<?xml version="1.0" encoding="us-ascii"?><InstanceReport xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><Version>2.2.0.25</Version><hasSegments>false</hasSegments><hasScenarios>false</hasScenarios><ReportLongName>006020 - Disclosure - Commitments and Contingencies</ReportLongName><DisplayLabelColumn>true</DisplayLabelColumn><ShowElementNames>false</ShowElementNames><RoundingOption /><HasEmbeddedReports>false</HasEmbeddedReports><Columns><Column><Id>1</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelColumn>false</LabelColumn><CurrencyCode>USD</CurrencyCode><FootnoteIndexer /><hasSegments>false</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName>1/1/2011 - 3/31/2011
USD ($)

USD ($) / shares

</KeyName><CurrencySymbol>$</CurrencySymbol><contextRef><ContextID>c00001</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0000948846</EntityValue><PeriodDisplayName /><PeriodType>duration</PeriodType><PeriodStartDate>2011-01-01T00:00:00</PeriodStartDate><PeriodEndDate>2011-03-31T00:00:00</PeriodEndDate><Segments /><Scenarios /></contextRef><UPS><UnitProperty><UnitID>u000</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://www.xbrl.org/2003/iso4217</MeasureSchema><MeasureValue>USD</MeasureValue><MeasureNamespace>iso4217</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty><UnitProperty><UnitID>u002</UnitID><UnitType>Divide</UnitType><NumeratorMeasure><MeasureSchema>http://www.xbrl.org/2003/iso4217</MeasureSchema><MeasureValue>USD</MeasureValue><MeasureNamespace>iso4217</MeasureNamespace></NumeratorMeasure><DenominatorMeasure><MeasureSchema>http://www.xbrl.org/2003/instance</MeasureSchema><MeasureValue>shares</MeasureValue><MeasureNamespace>xbrli</MeasureNamespace></DenominatorMeasure><Scale>0</Scale></UnitProperty><UnitProperty><UnitID>u001</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://www.xbrl.org/2003/instance</MeasureSchema><MeasureValue>shares</MeasureValue><MeasureNamespace>xbrli</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty></UPS><CurrencyCode>USD</CurrencyCode><OriginalCurrencyCode>USD</OriginalCurrencyCode></MCU><CurrencySymbol>$</CurrencySymbol><Labels><Label Id="1" Label="3 Months Ended" /><Label Id="2" Label="Mar. 31, 2011" /></Labels></Column></Columns><Rows><Row><Id>2</Id><IsAbstractGroupTitle>true</IsAbstractGroupTitle><Level>0</Level><ElementName>aai_NotesToFinancialStatementsAbstract</ElementName><ElementPrefix>aai</ElementPrefix><IsBaseElement>false</IsBaseElement><BalanceType>na</BalanceType><PeriodType>duration</PeriodType><ShortDefinition>No definition available.</ShortDefinition><IsReportTitle>false</IsReportTitle><IsSegmentTitle>false</IsSegmentTitle><IsSubReportEnd>false</IsSubReportEnd><IsCalendarTitle>false</IsCalendarTitle><IsTuple>false</IsTuple><IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow><IsEquityAdjustmentRow>false</IsEquityAdjustmentRow><IsBeginningBalance>false</IsBeginningBalance><IsEndingBalance>false</IsEndingBalance><IsReverseSign>false</IsReverseSign><PreferredLabelRole /><FootnoteIndexer /><Cells><Cell><Id>1</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText /><NonNumericTextHeader /><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat><hasSegments>false</hasSegments><hasScenarios>false</hasScenarios></Cell></Cells><OriginalInstanceReportColumns /><Unit>Other</Unit><ElementDataType>xbrli:stringItemType</ElementDataType><SimpleDataType>string</SimpleDataType><ElementDefenition>No definition available.</ElementDefenition><IsTotalLabel>false</IsTotalLabel><IsEPS>false</IsEPS><Label>Notes to Financial Statements [Abstract]</Label></Row><Row><Id>3</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><Level>0</Level><ElementName>us-gaap_CommitmentsAndContingenciesDisclosureTextBlock</ElementName><ElementPrefix>us-gaap</ElementPrefix><IsBaseElement>true</IsBaseElement><BalanceType>na</BalanceType><PeriodType>duration</PeriodType><ShortDefinition>No definition available.</ShortDefinition><IsReportTitle>false</IsReportTitle><IsSegmentTitle>false</IsSegmentTitle><IsSubReportEnd>false</IsSubReportEnd><IsCalendarTitle>false</IsCalendarTitle><IsTuple>false</IsTuple><IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow><IsEquityAdjustmentRow>false</IsEquityAdjustmentRow><IsBeginningBalance>false</IsBeginningBalance><IsEndingBalance>false</IsEndingBalance><IsReverseSign>false</IsReverseSign><PreferredLabelRole>terselabel</PreferredLabelRole><FootnoteIndexer /><Cells><Cell><Id>1</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText>&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt; FONT-WEIGHT: bold"&gt;Note 2 &amp;#8211; Commitments and Contingencies&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;&lt;/font&gt;&amp;#160;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt; FONT-WEIGHT: bold"&gt;Aircraft Related Commitments, Financing Arrangements and Transactions&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;&lt;/font&gt;&amp;#160;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;We have contractual obligations to purchase 51 additional B737 aircraft from The Boeing Company (Boeing) between 2012 and 2017. In June 2010, December 2010, and February 2011, we entered into amendments to our aircraft purchase agreements with Boeing to defer delivery dates for 13 B737 aircraft originally scheduled for delivery between 2011 and 2014 to delivery dates between 2015 and 2017. Boeing Capital Corporation (BCC), a wholly-owned subsidiary of Boeing, also exercised a previously negotiated contractual right requiring us to lease two used B717 aircraft for a term of 10 years commencing in 2011. We took delivery of both used B717 aircraft in February 2011. For financial accounting purposes, the two aircraft leases are capital leases and we recorded additions to flight equipment and capital lease obligations aggregating $24 million during the quarter ended March 31, 2011. In April 2011, we also deferred one B737 scheduled for delivery in February 2012 until June 2012.&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;The table below summarizes, as of March 31, 2011, all scheduled aircraft fleet additions:&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;&lt;/font&gt;&amp;#160;&lt;/div&gt;&lt;div align="left"&gt;&lt;table style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt" cellspacing="0" cellpadding="0" width="100%"&gt;&lt;tr&gt;&lt;td style="PADDING-BOTTOM: 2px" valign="bottom" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;td style="PADDING-BOTTOM: 2px" valign="bottom" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 2px solid" valign="bottom" colspan="2"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt; FONT-WEIGHT: bold"&gt;B737 Aircraft Purchases&lt;/font&gt;&lt;/div&gt;&lt;/td&gt;&lt;td style="PADDING-BOTTOM: 2px" valign="bottom" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="#cceeff"&gt;&lt;td valign="bottom" width="88%"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"&gt;&lt;div style="TEXT-INDENT: -9pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;Remainder of 2011&lt;/font&gt;&lt;/div&gt;&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;td valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;td valign="bottom" width="9%"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#8212;&lt;/font&gt;&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" width="1%" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="white"&gt;&lt;td valign="bottom" width="88%"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"&gt;&lt;div style="TEXT-INDENT: -9pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;2012&lt;/font&gt;&lt;/div&gt;&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;td valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;td valign="bottom" width="9%"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;6&lt;/font&gt;&lt;/div&gt;&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="#cceeff"&gt;&lt;td valign="bottom" width="88%"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"&gt;&lt;div style="TEXT-INDENT: -9pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;2013&lt;/font&gt;&lt;/div&gt;&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;td valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;td valign="bottom" width="9%"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;6&lt;/font&gt;&lt;/div&gt;&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="white"&gt;&lt;td valign="bottom" width="88%"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"&gt;&lt;div style="TEXT-INDENT: -9pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;2014&lt;/font&gt;&lt;/div&gt;&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;td valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;td valign="bottom" width="9%"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;8&lt;/font&gt;&lt;/div&gt;&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="#cceeff"&gt;&lt;td valign="bottom" width="88%"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"&gt;&lt;div style="TEXT-INDENT: -9pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;2015&lt;/font&gt;&lt;/div&gt;&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;td valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;td valign="bottom" width="9%"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;12&lt;/font&gt;&lt;/div&gt;&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="white"&gt;&lt;td valign="bottom" width="88%"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"&gt;&lt;div style="TEXT-INDENT: -9pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;2016&lt;/font&gt;&lt;/div&gt;&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;td valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;td valign="bottom" width="9%"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;14&lt;/font&gt;&lt;/div&gt;&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="#cceeff"&gt;&lt;td style="PADDING-BOTTOM: 2px" valign="bottom" width="88%"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"&gt;&lt;div style="TEXT-INDENT: -9pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;2017&lt;/font&gt;&lt;/div&gt;&lt;/div&gt;&lt;/td&gt;&lt;td style="PADDING-BOTTOM: 2px" valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 2px solid" valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 2px solid" valign="bottom" width="9%"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;5&lt;/font&gt;&lt;/div&gt;&lt;/div&gt;&lt;/td&gt;&lt;td style="PADDING-BOTTOM: 2px" valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="white"&gt;&lt;td style="PADDING-BOTTOM: 4px" valign="bottom" width="88%"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"&gt;&lt;div style="TEXT-INDENT: -9pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;Total&lt;/font&gt;&lt;/div&gt;&lt;/div&gt;&lt;/td&gt;&lt;td style="PADDING-BOTTOM: 4px" valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 4px double" valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;td style="BORDER-BOTTOM: black 4px double" valign="bottom" width="9%"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;51&lt;/font&gt;&lt;/div&gt;&lt;/div&gt;&lt;/td&gt;&lt;td style="PADDING-BOTTOM: 4px" valign="bottom" width="1%"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 11pt"&gt;&amp;#160; &lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;In addition to the above, we hold options, exercisable in 2011, to purchase two B737 aircraft in the fourth quarter of 2012.&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;As of March 31, 2011, our aircraft purchase commitments for the remainder of 2011 and for the next five years and thereafter, in aggregate, are (in millions): 2011&amp;#8212;$10; 2012&amp;#8212;$270; 2013&amp;#8212;$280; 2014&amp;#8212;$370; 2015&amp;#8212;$530; 2016&amp;#8212;$540; and thereafter&amp;#8212;$200. These amounts include payment commitments, including payment of pre-delivery deposits and buyer-furnished equipment, for aircraft on firm order. Aircraft purchase commitments include the forecasted impact of contractual price escalations. Our intention is to finance the aircraft on order through either debt financing, lease financing, or a mix thereof. We have debt financing commitments from a lender to finance a significant portion of the purchase price of two B737 aircraft scheduled for delivery to us in 2012. AirTran has no existing arrangements for the financing of B737s other than as described in the immediately preceding sentence. In addition, BCC has the right to require us to lease up to three additional used B717s for lease terms of up to 10 years per aircraft. If BCC requires us to lease any such used B717 aircraft, we have the right to cancel a like number of B737 aircraft from our B737 order book with Boeing.&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;There are multiple variables including capital market conditions, asset valuations, and our own operating performance that could affect the availability of satisfactory financing for our future B737 aircraft deliveries.&amp;#160;&amp;#160;While there was limited availability of satisfactory aircraft financing in early 2009, it is our view that the aircraft financing market has improved. While we cannot provide assurance that sufficient financing will be available, we expect to be able to obtain acceptable financing for future deliveries. Our view is based upon our discussions with prospective lenders and lessors, the consummation of aircraft financing transactions by other airlines, our own operating performance, and our recent ability to refinance B737 aircraft.&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;Our B737 contract with Boeing requires us to make pre-delivery deposits to Boeing. Although we typically have financed a significant portion of our pre-delivery deposit requirements with debt from banks or other financial institutions, we currently have no such financing in place for future deliveries. In recent years, we have rescheduled new aircraft deliveries to moderate our rate of growth and accordingly, we have stretched out our aircraft purchase obligations through 2017. We currently believe that our cash resources will be sufficient to satisfy our pre-delivery deposit obligations. Should our existing cash resources be insufficient, we may seek to: obtain additional debt financing or equity capital; further revise our aircraft delivery schedule; and/or amend the terms of our aircraft purchase agreement, including those provisions relating to pre-delivery deposits.&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt; FONT-WEIGHT: bold"&gt;Credit Card Processing Arrangements&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;We have agreements with organizations that process credit card transactions arising from purchases of air travel by customers of Airways. Each of our agreements with our credit card processors&amp;#160;allows, under specified conditions, the processor to retain cash related to future travel that such processor otherwise would remit to us (i.e., a holdback). Holdbacks are classified as restricted cash on our consolidated balance sheets. Our exposure to credit card holdbacks consists of advanced ticket sales that customers purchase with credit cards. Once the customer travels, any related holdback is remitted to us.&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;Each agreement with our two largest credit card processors provides that a processor may holdback amounts that would otherwise be remitted to us in the event that a processor reasonably determines that there has been a material adverse occurrence or certain other events occur. Our agreement with our largest credit card processor also provides that the processor may holdback amounts that would otherwise be remitted to us in the event that our aggregate unrestricted cash and investments (as defined) falls below agreed upon levels. Should the processor be entitled in the future to withhold amounts that would otherwise be remitted to us, we retain the contractual right to reduce the amounts withheld by providing the processor with letters of credit. As of March 31, 2011, a $50 million letter of credit had been issued under our letter of credit facility for the benefit of our largest credit card processor. Drawings on the letter of credit may be made by the processor only if we do not satisfy our obligations to reimburse the processor for chargebacks.&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;As of March 31, 2011, we had advance ticket sales of $365.6 million related to all credit card sales, we were in compliance with our credit card processing agreements, and our two largest processors were holding back no cash remittances from us. Our potential cash exposure to holdbacks by our two largest credit card processors, based on advance ticket sales as of March 31, 2011, was $296.1 million (after considering the $50 million letter of credit issued in favor of our largest credit card processor). Even had there been no letter of credit issued for the benefit of our largest credit card processor, as of March 31, 2011, neither of our two largest credit card processors would have been entitled to holdback any cash remittances from us.&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt; FONT-WEIGHT: bold"&gt;Taxes&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;&lt;/font&gt;&amp;#160;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;We remit a variety of taxes and fees to various governmental authorities, including income taxes, transportation fees and taxes collected from our customers, property taxes, sales and use taxes, payroll taxes, and fuel taxes. The taxes and fees remitted by us are subject to review and audit by the applicable governmental authorities which could result in liability for additional assessments. Contingencies for taxes, which are not based on income, are accounted for in accordance with the ASC Contingencies Topic. Uncertain income tax positions taken on income tax returns are accounted for in accordance with the ASC Income Taxes Topic. Although management believes that the positions taken on previously filed tax returns are reasonable, we nevertheless have recorded accrued liabilities in recognition that various taxing authorities may challenge certain of the positions we have taken, which may also potentially result in additional liabilities for taxes and interest in excess of accrued liabilities. These accrued liabilities are reviewed periodically and are adjusted as events occur that affect the estimates, such as the availability of new information, the lapsing of applicable statutes of limitations, the conclusion of tax audits, the measurement of additional estimated liability based on current calculations, the identification of new tax contingencies, or the rendering of relevant court decisions.&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt; FONT-WEIGHT: bold"&gt;Litigation&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;br /&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;As of April 21, 2011, eight purported class action lawsuits have been filed on behalf of&amp;#160;AirTran shareholders in connection with AirTran's proposed merger with Southwest Airlines. Four cases were brought in Nevada:&amp;#160;three in Nevada state court (&lt;font style="FONT-STYLE: italic; DISPLAY: inline"&gt;Leonelli&lt;/font&gt;, No.&amp;#160;10-OC-00448 1B; &lt;font style="FONT-STYLE: italic; DISPLAY: inline"&gt;Frohman&lt;/font&gt;, No.&amp;#160;10-OC-00449 1B; &lt;font style="FONT-STYLE: italic; DISPLAY: inline"&gt;Church&lt;/font&gt;, No.&amp;#160;A-10-626971-C), and one in federal court (&lt;font style="FONT-STYLE: italic; DISPLAY: inline"&gt;Nesbit&lt;/font&gt;, No.&amp;#160;2:11-cv-00092 (PMP)(GWF)). Four cases were brought in Florida state court&amp;#160;(&lt;font style="FONT-STYLE: italic; DISPLAY: inline"&gt;DeBardelaben&lt;/font&gt;, No. 2010-CA-022893-O; &lt;font style="FONT-STYLE: italic; DISPLAY: inline"&gt;Hoffner&lt;/font&gt;, No. 2010-CA-022143-O; &lt;font style="FONT-STYLE: italic; DISPLAY: inline"&gt;Loretisch&lt;/font&gt;, No. 2010-CA-023520-O; &lt;font style="FONT-STYLE: italic; DISPLAY: inline"&gt;Rosenberger&lt;/font&gt;, No. 2010-CA-023117-O). The allegations in all eight complaints were similar. In each case, plaintiffs allege that the members of the board of directors of AirTran violated their fiduciary duties to the company&amp;#160;by voting to approve the proposed merger and that AirTran, Southwest and Merger Sub&amp;#160;aided and abetted the board in&amp;#160;breaching those duties. (AirTran and the defendant directors will be referred to as the "AirTran Defendants".) In each case, plaintiffs&amp;#160;generally seek injunctive relief: (i) enjoining the defendants from consummating the merger unless AirTran adopts and implements a procedure or process to obtain the highest possible price for AirTran&amp;#8217;s stockholders and discloses all material information to AirTran&amp;#8217;s stockholders, (ii) directing the&amp;#160;board&amp;#160;to exercise their fiduciary duties to obtain a transaction that is in the best interests of AirTran&amp;#8217;s stockholders, (iii) rescinding, to the extent already implemented, the merger agreement, including the deal protection devices that may preclude premium competing bids for AirTran, (iv) awarding plaintiffs' costs and disbursements of the action, including reasonable attorneys&amp;#8217; and experts&amp;#8217; fees, and (v) granting such other and further equitable relief as the court may deem just and proper.&amp;#160;The &lt;font style="FONT-STYLE: italic; DISPLAY: inline"&gt;Leonelli &lt;/font&gt;and &lt;font style="FONT-STYLE: italic; DISPLAY: inline"&gt;Frohman&lt;/font&gt; cases were consolidated on November 24, 2010, and plaintiffs filed a Consolidated Complaint on December 14, 2010. The AirTran Defendants moved to dismiss the Consolidated Complaint on&amp;#160;January 7, 2011. Plaintiffs in the consolidated case&amp;#160;have not yet filed an opposition to that motion. Discovery in the consolidated case is in its early stages. The plaintiff in &lt;font style="FONT-STYLE: italic; DISPLAY: inline"&gt;Church&lt;/font&gt; voluntarily dismissed that case on&amp;#160;November 30, 2010, and filed a new complaint in the United States District Court for the District of Nevada on&amp;#160;December 2, 2010. The federal action raises substantially the same claims as in the state case, except plaintiff added claims under&amp;#160;Sections 14(a) and 20(a) of the Securities Exchange Act based on&amp;#160;the preliminary&amp;#160;proxy statement. On December 9, 2010, the plaintiff in &lt;font style="FONT-STYLE: italic; DISPLAY: inline"&gt;Church&lt;/font&gt; moved for expedited discovery, which was denied on&amp;#160;December 29, 2010. On December 20, 2010, the AirTran Defendants moved to dismiss the complaint, and&amp;#160;on December 22, 2010, the AirTran Defendants moved to stay discovery pursuant to the Private Securities Litigation Reform Act. The plaintiff filed an opposition to the motion to stay discovery on January 7, 2011, but has not yet filed an opposition to the motion to dismiss. The complaint in &lt;font style="FONT-STYLE: italic; DISPLAY: inline"&gt;Nesbit &lt;/font&gt;was filed on January 18, 2011. On February 9, 2011, after the plaintiff refused to voluntarily withdraw the complaint, the AirTran Defendants and the Southwest Defendants moved for a stay pending approval of the Memorandum of Understanding described below. Over the Plaintiff&amp;#8217;s objections, the magistrate judge recommended approval of the motion to stay on March 31, 2011. The magistrate also recommended that the plaintiff&amp;#8217;s motion for expedited discovery, which had been filed in connection with his opposition to the stay motion, be denied. The plaintiff moved for reconsideration of the magistrate&amp;#8217;s recommendations on April 11, 2011. The AirTran Defendants filed motions to stay the&amp;#160;four Florida cases&amp;#160;in favor of the&amp;#160;cases in Nevada. The court granted such motions on December 2, 2010.&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;While Southwest, AirTran, and the individual AirTran defendants believe that each of the above described lawsuits is without merit, the parties to the Leonelli consolidated complaint and the Church federal complaint entered into a Memorandum of Understanding (MOU) on January 26, 2011 to settle those lawsuits. The settlement provides for the inclusion of additional disclosures with respect to various aspects of the merger in the proxy statement/prospectus with respect to the proposed merger with Southwest. In addition, it provides for the payment of plaintiffs&amp;#8217; attorneys&amp;#8217; fees and expenses, subject to court approval. The MOU further provides that the parties will enter into a stipulation of settlement which will provide, among other things, for the conditional certification of a settlement class. The MOU and stipulation of settlement are subject to various conditions, including court approval following notice to AirTran stockholders, completion of certain discovery (which is ongoing now) and consummation of the merger. If the settlement is finally approved, it will resolve and release on behalf of the entire class of AirTran stockholders, all claims that were or could have been brought challenging any aspect of the merger, the merger agreement and any disclosure made in connection therewith, among other claims.&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;A complaint alleging violations of federal antitrust laws and seeking certification as a class action was filed against Delta Air Lines, Inc. (Delta) and AirTran in the United States District Court for the Northern District of Georgia in Atlanta on May 22, 2009. The complaint alleges, among other things, that AirTran attempted to monopolize air travel in violation of Section 2 of the Sherman Act, and conspired with Delta in imposing $15-per-bag fees for the first item of checked luggage in violation of Section 1 of the Sherman Act. The initial complaint sought treble damages on behalf of a putative class of persons or entities in the United States who directly paid Delta and/or AirTran such fees on domestic flights beginning December 5, 2008. Subsequent to the filing of the May 2009 complaint, various other nearly identical complaints also seeking certification as class actions were filed in federal district courts in Atlanta, Georgia; Orlando, Florida; and Las Vegas, Nevada. All of the cases&amp;#160;were consolidated before a single federal district court judge in Atlanta. A Consolidated Amended Complaint filed in the consolidated action on February 1, 2010 broadened the allegations to add claims that Delta and AirTran conspired to cut capacity on competitive routes and&amp;#160;raise&amp;#160;prices in violation of Section 1 of the Sherman Act, and that Delta attempted to monopolize air travel in violation of Section 2 of the Sherman Act. In addition to treble damages, the Consolidated Amended Complaint seeks injunctive relief against a broad range of alleged anticompetitive activities, as well as attorneys&amp;#8217; fees.&amp;#160;On August 2, 2010, the Court dismissed plaintiffs&amp;#8217; claims that AirTran and Delta had violated Section 2 of the Sherman Act; the Court let stand the claims of a conspiracy with respect to the imposition of a first bag fee and the airlines&amp;#8217; capacity and pricing decisions. AirTran denies all allegations of wrongdoing, including those in the Consolidated Amended Complaint, and intends to defend vigorously any and all such allegations.&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;In addition to the above litigation, AirTran is a party to&amp;#160;other claims, and litigation incidental to its business, for which it is not currently possible to determine the ultimate liability, if any. While the outcome of such claims and litigation is subject to uncertainty,&amp;#160;based on an evaluation of information currently available and consultation with legal counsel, management believes that resolution of such claims and litigation is not likely to have a material effect on the financial position, cash flows, or results of operations of the Company. The Company expenses legal costs as they are incurred.&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt; FONT-WEIGHT: bold"&gt;Restricted Cash and Letters of Credit&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;Restricted cash consists primarily of amounts escrowed related to aircraft leases, letters of credit for airports and insurance, credit card holdbacks for advance ticket sales, derivative financial instruments, and cash escrowed for future interest payments. As of March 31, 2011, $15.1 million of restricted cash relates to outstanding letters of credit, primarily for airport facilities and insurance.&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;We provide counterparties to our derivative financial instrument arrangements with collateral when the fair value of our obligation exceeds specified amounts. The collateral is classified as restricted cash if the funds are held in our name. The collateral is classified as deposits held by counterparty to derivative financial instruments if the funds are held by the counterparty. As of March 31, 2011, we provided interest rate swap counterparties with collateral aggregating $20.4&amp;#160;million, of which $17.0 million was classified as restricted cash.&lt;/font&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;We have a letter of credit facility which provides for a financial institution to issue letters of credit for the benefit of our credit card processors. The letter of credit facility is supported by a variety of assets. &lt;/font&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;As of &lt;/font&gt;&lt;font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 11pt"&gt;March 31, 2011, no amount was drawn against the $50 million letter of credit.&lt;/font&gt;&lt;/div&gt;</NonNumbericText><NonNumericTextHeader>Note 2 &amp;#8211; Commitments and Contingencies&amp;#160;Aircraft Related Commitments, Financing Arrangements and Transactions&amp;#160;We have contractual obligations to</NonNumericTextHeader><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat><hasSegments>false</hasSegments><hasScenarios>false</hasScenarios></Cell></Cells><OriginalInstanceReportColumns /><Unit>Other</Unit><ElementDataType>us-types:textBlockItemType</ElementDataType><SimpleDataType>string</SimpleDataType><ElementDefenition>Includes disclosure of commitments and contingencies. This element may be used as a single block of text to encapsulate the entire disclosure including data and tables.</ElementDefenition><ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name FASB Interpretation (FIN)
 -Number 14
 -Paragraph 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name Statement of Financial Accounting Standard (FAS)
 -Number 5
 -Paragraph 9, 10, 11, 12

</ElementReferences><IsTotalLabel>false</IsTotalLabel><IsEPS>false</IsEPS><Label>Commitments and Contingencies</Label></Row></Rows><Footnotes /><NumberOfCols>1</NumberOfCols><NumberOfRows>2</NumberOfRows><ReportName>Commitments and Contingencies</ReportName><MonetaryRoundingLevel>UnKnown</MonetaryRoundingLevel><SharesRoundingLevel>UnKnown</SharesRoundingLevel><PerShareRoundingLevel>UnKnown</PerShareRoundingLevel><ExchangeRateRoundingLevel>UnKnown</ExchangeRateRoundingLevel><HasCustomUnits>false</HasCustomUnits><SharesShouldBeRounded>true</SharesShouldBeRounded></InstanceReport>
