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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0001209191-10-044953.txt : 20100902
<SEC-HEADER>0001209191-10-044953.hdr.sgml : 20100902
<ACCEPTANCE-DATETIME>20100902182332
ACCESSION NUMBER:		0001209191-10-044953
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100831
FILED AS OF DATE:		20100902
DATE AS OF CHANGE:		20100902

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WRIGHT PHILLIP D
		CENTRAL INDEX KEY:			0001216708

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32599
		FILM NUMBER:		101055902

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Williams Partners L.P.
		CENTRAL INDEX KEY:			0001324518
		STANDARD INDUSTRIAL CLASSIFICATION:	NATURAL GAS TRANSMISSION [4922]
		IRS NUMBER:				202485124
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ONE WILLIAMS CENTER
		CITY:			TULSA
		STATE:			OK
		ZIP:			74172-0172
		BUSINESS PHONE:		(918) 573-2000

	MAIL ADDRESS:	
		STREET 1:		ONE WILLIAMS CENTER
		CITY:			TULSA
		STATE:			OK
		ZIP:			74172-0172
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-08-31</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001324518</issuerCik>
        <issuerName>Williams Partners L.P.</issuerName>
        <issuerTradingSymbol>WPZ</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001216708</rptOwnerCik>
            <rptOwnerName>WRIGHT PHILLIP D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE WILLIAMS CENTER</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>TULSA</rptOwnerCity>
            <rptOwnerState>OK</rptOwnerState>
            <rptOwnerZipCode>74172</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Senior Vice President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common units representing limited partnership interest</value>
            </securityTitle>
            <transactionDate>
                <value>2010-08-31</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>7659</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>12084</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Acquired pursuant to the Agreement and Plan of Merger, dated as of May 24, 2010, by and among the issuer, Williams Partners GP LLC, Williams Partners Operating LLC, WPZ Operating Company Merger Sub LLC, Williams Pipeline Partners L.P. (&quot;WMZ&quot;) and Williams Pipeline GP LLC (the &quot;Merger Agreement&quot;).  The reporting person received the common units in exchange for 10,100 common units of WMZ pursuant to the Merger Agreement, and received cash for any fractional units.  On August 31, 2010, the effective date of the merger, the New York Stock Exchange (&quot;NYSE&quot;) closing price of the issuer's common units was $42.11, and the NYSE closing price of the WMZ common units was $31.86.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Beth A. Burkholder, Attorney-in-Fact for Mr. Phillip D. Wright</signatureName>
        <signatureDate>2010-09-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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