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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-12-09</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001559720</issuerCik>
        <issuerName>Airbnb, Inc.</issuerName>
        <issuerTradingSymbol>ABNB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001209185</rptOwnerCik>
            <rptOwnerName>JORDAN JEFFREY D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>888 BRANNAN STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94103</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>2020-12-09</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2127</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2127</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>63640</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By AH Parallel Fund III, L.P.</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents an award of restricted stock units that will vest in full on May 25, 2021. Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock and has no expiration date.</footnote>
        <footnote id="F2">These shares are held of record by AH Parallel Fund III, L.P., for itself and as nominee for AH Parallel Fund III-A, L.P., AH Parallel Fund III-B, L.P. and AH Parallel Fund III-Q, L.P. (the &quot;AH Parallel Fund III Entities&quot;). AH Equity Partners III (Parallel), L.L.C. (&quot;AH EP III Parallel&quot;) is the general partner of the AH Parallel Fund III Entities and has sole voting and dispositive power with regard to the shares held by the AH Parallel Fund III Entities. The managing members of AH EP III Parallel are Marc Andreessen and Benjamin Horowitz. Marc Andreessen and Benjamin Horowitz share voting and dispositive power with respect to the shares held by the AH Parallel Fund III Entities.</footnote>
        <footnote id="F3">Mr. Jordan is a member of AH EP III Parallel, but he disclaims the existence of a &quot;group&quot; and disclaims beneficial ownership of the shares held by the AH Parallel Fund III Entities and this report shall not be deemed an admission that he is the beneficial owner of such shares, except to the extent of his pecuniary interest, if any, in such shares by virtue of his interest in the AH Parallel Fund III Entities, and/or AH EP III Parallel, as applicable.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Brian Savage, Attorney-in-fact</signatureName>
        <signatureDate>2020-12-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
