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

    <schemaVersion>X0407</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2023-06-21</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001758488</issuerCik>
        <issuerName>ONESPAWORLD HOLDINGS Ltd</issuerName>
        <issuerTradingSymbol>OSW</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001018946</rptOwnerCik>
            <rptOwnerName>STEINER LEISURE Ltd</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>OFFICE NUMBER 2, PINEAPPLE BUSINESS PARK</rptOwnerStreet1>
            <rptOwnerStreet2>AIRPORT INDUSTRIAL PARK, P.O. BOX N-624</rptOwnerStreet2>
            <rptOwnerCity>NASSAU</rptOwnerCity>
            <rptOwnerState>C5</rptOwnerState>
            <rptOwnerZipCode>00000</rptOwnerZipCode>
            <rptOwnerStateDescription>BAHAMAS</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001770497</rptOwnerCik>
            <rptOwnerName>Nemo Investor Aggregator, Ltd</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O MOURANT OZANNES CORPORATE SERVICES</rptOwnerStreet1>
            <rptOwnerStreet2>94 SOLARIS AVENUE, PO BOX 1348</rptOwnerStreet2>
            <rptOwnerCity>CAMANA BAY, GRAND CAYMAN</rptOwnerCity>
            <rptOwnerState>E9</rptOwnerState>
            <rptOwnerZipCode>0000</rptOwnerZipCode>
            <rptOwnerStateDescription>CAYMAN ISLANDS</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2023-06-21</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3200000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10.29</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>7960760</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The reported securities were sold by Steiner Leisure Ltd. (&quot;SLL&quot;) pursuant to Rule 144 under the Securities Act of 1933, as amended.</footnote>
        <footnote id="F2">SLL is controlled by Nemo Investor Aggregator, Limited, a Cayman Islands exempted company. Nemo Investor Aggregator, Limited is governed by a board of directors consisting of seven directors. Each director has one vote, and the approval of a majority of the directors is required to approve an action of Nemo Investor Aggregator, Limited. Based upon the foregoing, each director of Nemo Investor Aggregator, Limited disclaims beneficial ownership of such shares.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>STEINER LEISURE LIMITED, /s/ Marc Magliacano, Vice President and Assistant Secretary</signatureName>
        <signatureDate>2023-06-23</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>NEMO INVESTOR AGGREGATOR LIMITED, /s/ Marc Magliacano, President and Chairman</signatureName>
        <signatureDate>2023-06-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
