<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-11-10</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001538849</issuerCik>
        <issuerName>CrossAmerica Partners LP</issuerName>
        <issuerTradingSymbol>CAPL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001278166</rptOwnerCik>
            <rptOwnerName>CIRCLE K STORES INC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1130 WEST WARNER ROAD</rptOwnerStreet1>
            <rptOwnerStreet2>BUILDING B</rptOwnerStreet2>
            <rptOwnerCity>TEMPE</rptOwnerCity>
            <rptOwnerState>AZ</rptOwnerState>
            <rptOwnerZipCode>85284</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001562039</rptOwnerCik>
            <rptOwnerName>CST BRANDS, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>19500 BULVERDE ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN ANTONIO</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>78259</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001586471</rptOwnerCik>
            <rptOwnerName>CST Services LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE VALERO WAY</rptOwnerStreet1>
            <rptOwnerStreet2>19500 BULVERDE ROAD</rptOwnerStreet2>
            <rptOwnerCity>SAN ANTONIO</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>78259</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001586474</rptOwnerCik>
            <rptOwnerName>CST USA INC.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>19500 BULVERDE ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN ANTONIO</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>78259</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Units</value>
            </securityTitle>
            <transactionDate>
                <value>2017-11-10</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>126491</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>26.0889</value>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>7070010</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Circle K Stores Inc. indirectly owns 100% of CST Brands, LLC, the owner of CST USA Inc., which is the parent of CST Services LLC. As a result, Circle K Stores Inc. is deemed the beneficial owner of the
CAPL common units owned by CST Services LLC.</footnote>
        <footnote id="F2">Pursuant to that certain Amended and Restated Omnibus Agreement (the &quot;Omnibus Agreement&quot;) by and among CrossAmerica Partners LP, a Delaware limited partnership (the &quot;Partnership&quot;), CrossAmerica
GP LLC, a Delaware limited liability company and general partner of the Partnership (the &quot;General Partner&quot;), Lehigh Gas Corporation, a Delaware corporation, CST Services LLC, a Delaware limited liability
company (&quot;CST Services&quot;), and Joseph V. Topper, J r., the Partnership is required to pay to CST Services a management fee for providing services to the Partnership (the &quot;Management Fee&quot;).</footnote>
        <footnote id="F3">The board of directors of the General Partner, based on the approval and recommendation of the independent conflicts committee of the General Partner, determined it is in the best interests of the Partnership
to pay the Management Fee to CST Services in whole or in part in newly issued common units representing limited partner interests in the Partnership (&quot;Common Units&quot;) in lieu of cash.</footnote>
        <footnote id="F4">Pursuant to the Omnibus Agreement, the price of the acquired Common units was determined using a 20-day trailing volume weighted average price ending on the business day prior to the quarterly invoice
date of October 30, 2017.</footnote>
        <footnote id="F5">CST and CST USA are indirect beneficial owners of the Common Units held by CST Services.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Giovanna Rueda, Authorized Representative of Circle K Stores Inc.</signatureName>
        <signatureDate>2018-03-05</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Giovanna Rueda, Corporate Secretary CST Brands, LLC</signatureName>
        <signatureDate>2018-03-05</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Giovanna Rueda, Corporate Secretary of CST USA Inc.</signatureName>
        <signatureDate>2018-03-05</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Giovanna Rueda, Corporate Secrertary of CST Services LLC</signatureName>
        <signatureDate>2018-03-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
