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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2022-03-28</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001727263</issuerCik>
        <issuerName>Frontdoor, Inc.</issuerName>
        <issuerTradingSymbol>FTDR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
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            <rptOwnerCik>0001750883</rptOwnerCik>
            <rptOwnerName>Brim Chastitie</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>150 PEABODY PLACE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MEMPHIS</rptOwnerCity>
            <rptOwnerState>TN</rptOwnerState>
            <rptOwnerZipCode>38103</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP, Controller &amp; CAO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

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                <sharesOwnedFollowingTransaction>
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                <transactionPricePerShare>
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            <expirationDate>
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            <underlyingSecurity>
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            </underlyingSecurity>
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                    <value>D</value>
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        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Employee Stock Options (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>28.82</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2022-03-28</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
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            <transactionTimeliness>
                <value></value>
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            <transactionAmounts>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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            <exerciseDate>
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            <expirationDate>
                <value>2032-03-28</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
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            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
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                </sharesOwnedFollowingTransaction>
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            <transactionTimeliness>
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            <transactionAmounts>
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                <transactionPricePerShare>
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                    <value>0.00</value>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
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                <footnoteId id="F7"/>
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                </sharesOwnedFollowingTransaction>
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    </derivativeTable>

    <footnotes>
        <footnote id="F1">Reflects restricted stock units that upon vesting converted into shares of common stock on a one-for-one basis.</footnote>
        <footnote id="F2">Includes 83 aggregate shares of the Company's common stock acquired under the Frontdoor, Inc. 2019 Employee Stock Purchase Plan on June 30, 2021 and December 31,2021.</footnote>
        <footnote id="F3">Reflects shares withheld to cover the Reporting Person's tax liability incident to the vesting of restricted stock units.</footnote>
        <footnote id="F4">Each unit is the economic equivalent of one share of the Company's stock.  The restricted stock units were granted on March 28, 2022 and will vest and settle in three equal installments on March 28, 2023, 2024 and 2025, subject to continued employment with the Company.</footnote>
        <footnote id="F5">Non-qualified stock options granted on March 28, 2022 will vest 25% on March 28, 2023, and thereafter vest 6.25% quarterly over the next three years on the quarterly anniversary of the grant date, such that all shares will have vested on March 28, 2026, subject to continued employment with the Company.</footnote>
        <footnote id="F6">Each unit is the economic equivalent of one share of the Company's stock.  The restricted stock units were granted on March 29, 2019 and vested and settled in three equal installments on March 29, 2020, 2021 and 2022, subject to continued employment with the Company.</footnote>
        <footnote id="F7">Each unit is the economic equivalent of one share of the Company's stock.  The restricted stock units were granted on March 29, 2021 and will vest and settle in three equal installments on March 29, 2022, 2023 and 2024, subject to continued employment with the Company.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Stephanie Delavale, as Attorney-In-Fact for Chastitie Brim</signatureName>
        <signatureDate>2022-03-30</signatureDate>
    </ownerSignature>
</ownershipDocument>
