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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-11-02</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001407973</issuerCik>
        <issuerName>Sonendo, Inc.</issuerName>
        <issuerTradingSymbol>SONX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001207793</rptOwnerCik>
            <rptOwnerName>BERGHEIM OLAV</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O FJORD VENTURES LLC</rptOwnerStreet1>
            <rptOwnerStreet2>26051 MERIT CIRCLE, SUITE 102</rptOwnerStreet2>
            <rptOwnerCity>LAGUNA HILLS</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92653</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

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            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-11-02</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
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            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
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                </transactionShares>
                <transactionPricePerShare>
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                </transactionPricePerShare>
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                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
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                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held by Fjordinvest LLC</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
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            </transactionDate>
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                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
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                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held by Fjordinvest (Cayman) Ltd.</value>
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                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
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            </transactionDate>
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            <transactionTimeliness>
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        </nonDerivativeTransaction>
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                <value></value>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held by Micro LLC</value>
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                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
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                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Micro LLC</value>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
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            </transactionDate>
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                <transactionFormType>4</transactionFormType>
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            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
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                </transactionAcquiredDisposedCode>
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                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held by Fjord Capital Partners I, L.P.</value>
                    <footnoteId id="F6"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-11-02</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
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            <transactionTimeliness>
                <value></value>
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            </postTransactionAmounts>
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        <nonDerivativeTransaction>
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        </nonDerivativeTransaction>
    </nonDerivativeTable>

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            <expirationDate>
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            </underlyingSecurity>
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            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>592002</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>592002</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held by Fjord Capital Partners I, L.P.</value>
                    <footnoteId id="F6"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Series C Preferred Stock</value>
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            <transactionDate>
                <value>2021-11-02</value>
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                <transactionFormType>4</transactionFormType>
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            <transactionTimeliness>
                <value></value>
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            <transactionAmounts>
                <transactionShares>
                    <value>99626</value>
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                    <footnoteId id="F1"/>
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                <footnoteId id="F1"/>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
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                </underlyingSecurityTitle>
                <underlyingSecurityShares>
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                </underlyingSecurityShares>
            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
                    <value>0</value>
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            <ownershipNature>
                <directOrIndirectOwnership>
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                <natureOfOwnership>
                    <value>Held by Fjord Capital Partners I, L.P.</value>
                    <footnoteId id="F6"/>
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            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
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                <value>2021-11-02</value>
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            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>286673</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
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            <exerciseDate>
                <footnoteId id="F1"/>
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                <footnoteId id="F1"/>
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            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held by Fjordinvest (Cayman) II Ltd.</value>
                    <footnoteId id="F7"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Series E Preferred Stock</value>
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            <transactionTimeliness>
                <value></value>
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            <transactionAmounts>
                <transactionShares>
                    <value>24906</value>
                </transactionShares>
                <transactionPricePerShare>
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                    <value>D</value>
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                <footnoteId id="F1"/>
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                </underlyingSecurityShares>
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                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
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                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held by IRA</value>
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                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Upon the closing of the Issuer's initial public offering, each share of preferred stock automatically converted into shares of the Issuer's common stock on a one-for-one basis.</footnote>
        <footnote id="F2">Mr. Bergheim is the president of Micro LLC, the managing member of Fjordinvest LLC, and is the manager of Fjordinvest LLC. Mr. Bergheim exercises voting and dispositive power over the shares held by Fjordinvest LLC. Mr. Bergheim disclaims beneficial ownership of these shares except to the extent of his pecuniary interest in such shares.</footnote>
        <footnote id="F3">Mr. Bergheim is the chief executive officer of Fjordinvest (Cayman) Ltd. and exercises voting and dispositive power over the shares held by Fjordinvest (Cayman) Ltd. Mr. Bergheim disclaims beneficial ownership of these shares except to the extent of his pecuniary interest in such shares.</footnote>
        <footnote id="F4">Mr. Bergheim is the president of Fjord Ventures LLC and exercises voting and dispositive power over the shares held by Fjord Ventures LLC. Mr. Bergheim disclaims beneficial ownership of these shares except to the extent of his pecuniary interest in such shares</footnote>
        <footnote id="F5">Mr. Bergheim is the president of Micro LLC, the managing member of Fjordinvest LLC, and is the manager of Fjordinvest LLC. Mr. Bergheim exercises voting and dispositive power over the shares held by Fjordinvest LLC. Mr. Bergheim disclaims beneficial ownership of these shares except to the extent of his pecuniary interest in such shares.</footnote>
        <footnote id="F6">Mr. Bergheim is the manager of Fjord Venture Partners I, LLC, the general partner of Fjord Capital Partners I, LP, and exercises voting and dispositive power over the shares held Fjord Capital Partners I, LP. Mr. Bergheim disclaims beneficial ownership of these shares except to the extent of his pecuniary interest in such shares.</footnote>
        <footnote id="F7">Mr. Bergheim is the chief executive officer of Fjordinvest (Cayman) II Ltd. and exercises voting and dispositive power over the shares held by Fjordinvest (Cayman) II Ltd. Mr. Bergheim disclaims beneficial ownership of these shares except to the extent of his pecuniary interest in such shares.</footnote>
        <footnote id="F8">Held by PENSCO Trust Company, Custodian, FBO Olav Bergheim.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>By: /s/ Jacqueline Collins, Attorney-in-Fact for Olav Bergheim</signatureName>
        <signatureDate>2021-11-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
