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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-09-10</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001809104</issuerCik>
        <issuerName>Alight, Inc. / Delaware</issuerName>
        <issuerTradingSymbol>ALIT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000903213</rptOwnerCik>
            <rptOwnerName>FOLEY WILLIAM P II</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ALIGHT, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>4 OVERLOOK POINT</rptOwnerStreet2>
            <rptOwnerCity>LINCOLNSHIRE</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60069-4337</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-09-10</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>250000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>350000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>23197500</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See notes</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents restricted stock units scheduled to vest in approximately three equal installments on December 31, 2021, December 31, 2022 and December 31, 2023.</footnote>
        <footnote id="F2">Represents 16,238,250 shares of Class A common stock directly held by Trasimene Capital FT, LP and 6,959,250 shares of Class A common stock directly held by Bilcar FT, LP.</footnote>
        <footnote id="F3">William P. Foley, II (the &quot;Reporting Person&quot;) is the sole member of Bilcar FT, LLC, which, in turn, is the sole general partner of Bilcar FT, LP. The Reporting Person is also the sole member of Trasimene Capital FT, LLC, which, in turn, is the sole general partner of Trasimene Capital FT, LP. Because of the relationships between the Reporting Person and Bilcar FT, LP, Bilcar FT, LLC, Trasimene Capital FT, LP and Trasimene Capital FT, LLC, the Reporting Person may be deemed to beneficially own the securities reported herein to the extent of his pecuniary interests. The
Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of his pecuniary interest therein, if any.</footnote>
    </footnotes>

    <remarks>Exhibit List:
Exhibit 24.1 Power of Attorney</remarks>

    <ownerSignature>
        <signatureName>/s/ Paulette Dodson, General Counsel and Corporate Secretary, as Attorney-in-Fact</signatureName>
        <signatureDate>2021-09-14</signatureDate>
    </ownerSignature>
</ownershipDocument>
