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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2021-03-29</periodOfReport>

    <dateOfOriginalSubmission>2021-03-31</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001161492</rptOwnerCik>
            <rptOwnerName>HEYER STEVEN J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>770 SOUTH DIXIE HIGHWAY, SUITE 200</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CORAL GABLES</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33146</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2021-03-29</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>257247</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1310683</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2021-03-29</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>180840</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1491523</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F4"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Steven Heyer Entities (as defined below)</value>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">On March 29, 2021, an aggregate of 438,087 common shares of the Issuer (the &quot;Common Shares&quot;) were issued to the reporting person, Harris Reid Heyer Trust, James Heyer Trust, Peter Justin Heyer Trust, William Heyer Trust, The Kate J Heyer 2013 Trust and The David H Heyer 2013 Trust (collectively with the reporting person, the &quot;Steven Heyer Holders&quot;) with no consideration being paid in connection therewith, in satisfaction of the Issuer's obligation to issue the Common Shares under the Business Combination Agreement, dated November 1, 2018 (as amended, the &quot;BCA&quot;), by and among the Issuer, Haymaker Sponsor LLC (&quot;Haymaker Sponsor&quot;) and the other parties named therein. The Steven Heyer Holders received the right in and to the Common Shares upon a distribution in kind from Haymaker Sponsor. The reporting person was directly issued 257,247 Common Shares.</footnote>
        <footnote id="F2">(Continued from footnote 1) Harris Reid Heyer Trust, James Heyer Trust, Peter Justin Heyer Trust, William Heyer Trust, The Kate J Heyer 2013 Trust and The David H Heyer 2013 Trust (collectively, the &quot;Steven Heyer Entities&quot;) were issued 17,385, 17,385, 17,385, 17,385, 55,650 and 55,650 Common Shares, respectively.</footnote>
        <footnote id="F3">Includes an aggregate of 1,053,436 Common Shares held prior to March 29, 2021, of which (i) 923,920 Common Shares were held directly by the reporting person, (ii) 32,379 Common Shares were held by Harris Reid Heyer Trust, (iii) 32,379 Common Shares were held by James Heyer Trust, (iv) 32,379 Common Shares were held by Peter Justin Heyer Trust and (v) 32,379 Common Shares were held by William Heyer Trust.</footnote>
        <footnote id="F4">The reporting person is a trustee of each of the Steven Heyer Entities. Accordingly, the reporting person may be deemed to have or share beneficial ownership of securities held by the Steven Heyer Entities. The reporting person disclaims beneficial ownership of such securities, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.</footnote>
    </footnotes>

    <remarks>This amendment is being filed to report the 55,650 Common Shares issued to each of The Kate J Heyer 2013 Trust and The David H Heyer 2013 Trust, which Common Shares the reporting person may be deemed to have or share beneficial ownership thereof, that were inadvertently omitted in the original filing.</remarks>

    <ownerSignature>
        <signatureName>/s/ Stephen B. Lazarus, as Attorney-in-Fact for Steven J. Heyer</signatureName>
        <signatureDate>2021-04-15</signatureDate>
    </ownerSignature>
</ownershipDocument>
