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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-11-11</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001725255</issuerCik>
        <issuerName>AdaptHealth Corp.</issuerName>
        <issuerTradingSymbol>AHCO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001427430</rptOwnerCik>
            <rptOwnerName>Assured Investment Management LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>280 PARK AVENUE, 12TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</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>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
                <footnoteId id="F3"/>
                <footnoteId id="F4"/>
            </securityTitle>
            <transactionDate>
                <value>2020-11-12</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>150581</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3797934</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Class B Common Stock</value>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
                <footnoteId id="F3"/>
                <footnoteId id="F4"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F3"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2020-11-11</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>150581</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2019-11-08</value>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F3"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Common Stock</value>
                    <footnoteId id="F3"/>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <footnoteId id="F3"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The filing of this Form 4 shall not be construed as an admission that Assured Investment Management LLC (f/k/a BlueMountain Capital Management, LLC) (&quot;AssuredIM&quot;) is or was for the purposes of Section 16(a) of the Securities Exchange Act of 1934, as amended (the &quot;Exchange Act&quot;), or otherwise the beneficial owner of any shares of Class A Common Stock, par value $0.0001 per share (&quot;Class A Common Stock&quot;), of AdaptHealth Corp. (the &quot;Issuer&quot;) or Class B Common Stock, par value $0.0001 per share (&quot;Class B Common Stock&quot; and, together with the Class A Common Stock, the &quot;Common Stock&quot;), of the Issuer.  Pursuant to Rule 16a-1(a)(4) of the Exchange Act, AssuredIM disclaims such beneficial ownership, except to the extent of its pecuniary interest.</footnote>
        <footnote id="F2">AssuredIM is the investment manager of BlueMountain Summit Opportunities Fund II (US) L.P. (the &quot;Fund&quot;), which was the direct beneficial owner of 150,581 shares of Class B Common Stock and is the beneficial owner of 150,581 shares of Class A Common Stock.  AssuredIM, although it directs the disposition and voting of the Common Stock held by the Fund, only receives an asset-based fee relating to the Common Stock.</footnote>
        <footnote id="F3">Pursuant to the terms of the Exchange Agreement dated as of November 8, 2019 by and among the Issuer, AdaptHealth Holdings LLC, a subsidiary of the Issuer, and the other parties thereto (the &quot;Exchange Agreement&quot;), each share of Class B Common Stock, when combined with a common unit representing limited liability company interests in AdaptHealth Holdings LLC (&quot;LLC Unit&quot;), is exchangeable at any time for one share of Class A Common Stock or, at the Issuer's election, the cash equivalent to the market value of one share of Class A Common Stock.  The Class B Common Stock has no expiration date.</footnote>
        <footnote id="F4">On November 11, 2020, the Fund delivered notice to the Issuer for the conversion of 150,581 shares of Class B Common Stock and LLC Units pursuant to the terms of the Exchange Agreement.  On November 12, 2020, in connection with such conversion, the Fund received 150,581 shares of Class A Common Stock from the Issuer.</footnote>
    </footnotes>

    <remarks>Dale Wolf serves as a director of the Issuer as the representative of AssuredIM.  In connection therewith, AssuredIM may be deemed to be a director by deputization of the Issuer solely for purposes of Section 16(a) of the Exchange Act.  As a result, AssuredIM is listed as a &quot;Reporting Person&quot; in Item 1 and the &quot;Director&quot; box is marked in Item 4 of this Form 4.</remarks>

    <ownerSignature>
        <signatureName>Assured Investment Management LLC, By: /s/ Eric M. Albert, Chief Compliance Officer</signatureName>
        <signatureDate>2020-11-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
