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

    <schemaVersion>X0407</schemaVersion>

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    <periodOfReport>2023-03-27</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001362117</rptOwnerCik>
            <rptOwnerName>Fiarman Jeffrey</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3400 PLAYERS CLUB PARKWAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MEMPHIS</rptOwnerCity>
            <rptOwnerState>TN</rptOwnerState>
            <rptOwnerZipCode>381125</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SVP &amp; General Counsel</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

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            <expirationDate>
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            </underlyingSecurity>
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        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Employee Stock Option (right to buy)</value>
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                <value>26.42</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2023-03-27</value>
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            <transactionTimeliness>
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                <transactionPricePerShare>
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            <exerciseDate>
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            <expirationDate>
                <value>2033-03-27</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
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            </underlyingSecurity>
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                </sharesOwnedFollowingTransaction>
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            <deemedExecutionDate></deemedExecutionDate>
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                </transactionShares>
                <transactionPricePerShare>
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                    <value>D</value>
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    <footnotes>
        <footnote id="F1">Reflects restricted stock units that upon vesting convert into shares of common stock on a one-for-one basis.</footnote>
        <footnote id="F2">Reflects shares withheld to cover the Reporting Person's tax liability incident to the vesting of restricted stock units.</footnote>
        <footnote id="F3">Each unit is the economic equivalent of one share of the Company's common stock.  The restricted stock units were granted on March 27, 2023 and vest and settle in three equal installments on March 27, 2024, 2025 and 2026, subject to continued service with the Company.</footnote>
        <footnote id="F4">The service condition will fully vest one year from the grant date, on March 27, 2024.  The performance-vesting criteria will vest in three performance tranches of 15,193, 23,482 and 33,449 shares respectively, each with a separate performance condition based on the volume-weighted average price of the Company's common stock on the NASDAQ of $32.23, $35.14 and $38.31, respectively, over any 20 consecutive trading-day period beginning on the grant date and ending on March 27, 2027, subject to continued service with the Company.</footnote>
        <footnote id="F5">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 service 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, 2021 and will vest and settle in three equal installments on March 29, 2022, 2023 and 2024, subject to continued service with the Company.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Stephanie Delavale, as Attorney-In-Fact for Jeffrey Fiarman</signatureName>
        <signatureDate>2023-03-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
