-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 BpeTC3bCCKVjKMxIPYXqhPn5i7YyN9F+45val5qvgB5i/ihsJrZ+XuiCYWQPITz8
 Vu37whESu3HV8CfWDYXC9A==

<SEC-DOCUMENT>0000906279-06-000001.txt : 20060213
<SEC-HEADER>0000906279-06-000001.hdr.sgml : 20060213
<ACCEPTANCE-DATETIME>20060213160257
ACCESSION NUMBER:		0000906279-06-000001
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060202
FILED AS OF DATE:		20060213
DATE AS OF CHANGE:		20060213

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UAL CORP /DE/
		CENTRAL INDEX KEY:			0000100517
		STANDARD INDUSTRIAL CLASSIFICATION:	AIR TRANSPORTATION, SCHEDULED [4512]
		IRS NUMBER:				362675207
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1200 ALGONQUIN ROAD
		CITY:			ELK GROVE TOWNSHIP
		STATE:			IL
		ZIP:			60007
		BUSINESS PHONE:		8477004000

	MAIL ADDRESS:	
		STREET 1:		JOHN LAKOSIL - WHQLD
		STREET 2:		1200 E. ALGONQUIN ROAD
		CITY:			ELK GROVE TOWNSHIP
		STATE:			IL
		ZIP:			60007

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ALLEGIS CORP
		DATE OF NAME CHANGE:	19880613

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	UAL INC
		DATE OF NAME CHANGE:	19870517

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PENSION BENEFIT GUARANTY CORP/132-129/
		CENTRAL INDEX KEY:			0000906279
		STATE OF INCORPORATION:			DC
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-06033
		FILM NUMBER:		06603673

	BUSINESS ADDRESS:	
		STREET 1:		1200 K. STREET, NW
		CITY:			WASHINGTON
		STATE:			DC
		ZIP:			20005
		BUSINESS PHONE:		202-326-4000

	MAIL ADDRESS:	
		STREET 1:		1200 K. STREET, NW
		CITY:			WASHINGTON
		STATE:			DC
		ZIP:			20005
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2006-02-02</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000100517</issuerCik>
        <issuerName>UAL CORP /DE/</issuerName>
        <issuerTradingSymbol>uaua</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000906279</rptOwnerCik>
            <rptOwnerName>PENSION BENEFIT GUARANTY CORP/132-129/</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1200 K. STREET, NW</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WASHINGTON</rptOwnerCity>
            <rptOwnerState>DC</rptOwnerState>
            <rptOwnerZipCode>20005</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, par value $0.01 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>11103316</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>2% Convertible Preferred Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5000000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>/s/ James Gerber, Chief Financial Officer</signatureName>
        <signatureDate>2006-02-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----