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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-08-06</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001817118</rptOwnerCik>
            <rptOwnerName>OEP VII GP, L.L.C.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ONE EQUITY PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>510 MADISON AVENUE, 19TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001817112</rptOwnerCik>
            <rptOwnerName>OEP AHCO Investment Holdings, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ONE EQUITY PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>510 MADISON AVENUE, 19TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001733523</rptOwnerCik>
            <rptOwnerName>ONE EQUITY PARTNERS VII, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ONE EQUITY PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>510 MADISON AVENUE, 19TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001733525</rptOwnerCik>
            <rptOwnerName>ONE EQUITY PARTNERS VII-A, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ONE EQUITY PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>510 MADISON AVENUE, 19TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001733528</rptOwnerCik>
            <rptOwnerName>ONE EQUITY PARTNERS VII-B, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ONE EQUITY PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>510 MADISON AVENUE, 19TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001817120</rptOwnerCik>
            <rptOwnerName>OEP VII Project A Co-Investment Partners, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ONE EQUITY PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>510 MADISON AVENUE, 19TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001817115</rptOwnerCik>
            <rptOwnerName>OEP VII General Partner, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ONE EQUITY PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>510 MADISON AVENUE, 19TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001172898</rptOwnerCik>
            <rptOwnerName>CASHIN RICHARD M JR</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ONE EQUITY PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>510 MADISON AVENUE, 19TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001817107</rptOwnerCik>
            <rptOwnerName>Han David</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ONE EQUITY PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>510 MADISON AVENUE, 19TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-08-06</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F3"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>862983</value>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                    <footnoteId id="F3"/>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>10930471</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-08-06</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F3"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>862983</value>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                    <footnoteId id="F3"/>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>10930471</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Series A Convertible Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>13.75</value>
                <footnoteId id="F4"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2020-08-06</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F3"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3134</value>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F4"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F4"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>227927</value>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>39706</value>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Series A Convertible Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>13.75</value>
                <footnoteId id="F4"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2020-08-06</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F3"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3134</value>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F4"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F4"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>227927</value>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>39706</value>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">These securities are held directly by OEP AHCO Investment Holdings, LLC (&quot;Investor&quot;). Investor is owned by One Equity Partners VII, L.P., a Cayman Islands exempted limited partnership (&quot;OEP VII LP&quot;), One Equity Partners VII-A, L.P., a Cayman Islands exempted limited partnership (&quot;OEP VII-A LP&quot;), One Equity Partners VII-B, L.P., a Delaware limited partnership (&quot;OEP VII-B LP&quot;), and OEP VII Project A Co-Investment Partners, L.P., a Delaware limited partnership (&quot;OEP VII Project A LP&quot; and, together with OEP VII LP, OEP VII-A LP and OEP VII-B LP, the &quot;Parallel Funds&quot;). The general partner of each of the Parallel Funds is OEP VII General Partner, L.P., a Cayman Islands exempted limited partnership (&quot;OEP VII GP&quot;), and the general partner of OEP VII GP is OEP VII GP, L.L.C., a Cayman Islands limited liability company (&quot;OEP VII GP LLC&quot;). OEP VII GP LLC is member-managed by Messrs. Richard Cashin and David Han.</footnote>
        <footnote id="F2">(Continued from Footnote 1) By virtue of the relationships described above, each of the Parallel Funds, OEP VII GP, OEP VII GP LLC and Messrs. Richard Cashin and David Han may be deemed to beneficially own, and share voting and dispositive power with respect to, the securities held directly by Investor. Each of the reporting persons disclaims beneficial ownership of the securities except to the extent of its or his pecuniary interest therein.</footnote>
        <footnote id="F3">In connection with a re-allocation of ownership interests in Investor, the Reporting Persons are filing this Form 4 to report the acquisition by OEP VII Project A LP of additional membership interests in Investor, which reduced the relative percentage of membership interests of Investor owned by each of OEP VII LP, OEP VII-A LP and OEP VII-B LP prior to such acquisition. No shares of Class A Common Stock or Series A Convertible Preferred Stock were transferred by Investor in connection with such transaction.</footnote>
        <footnote id="F4">The number of shares of Class A Common Stock of AdaptHealth Corp., a Delaware corporation (the &quot;Issuer&quot;), having par value of $0.0001 per share (the &quot;Class A Common Stock&quot;), deliverable upon conversion of each share of Series A Convertible Preferred Stock, par value $0.0001 per share (the &quot;Series A Preferred Stock&quot;), is equal to 72.727273 shares, subject to customary anti-dilution and other adjustments. The terms of the Series A Preferred Stock generally restrict the conversion of such shares until the shares of Class A Common Stock issuable upon conversion thereof has been approved by stockholders of the Issuer in accordance with Nasdaq Listing Rules. Thereafter, the holder or the Issuer may convert the Series A Preferred Stock. The Series A Preferred Stock has no expiration date.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>OEP AHCO INVESTMENT HOLDINGS, LLC, By: /s/ Bradley J. Coppens, Authorized Person</signatureName>
        <signatureDate>2020-08-10</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>ONE EQUITY PARTNERS VII, L.P., By: OEP VII General Partner, L.P., its general partner, By: OEP VII GP, L.L.C., its general partner, By: /s/ Gregory
Belinfanti, Authorized Person</signatureName>
        <signatureDate>2020-08-10</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>ONE EQUITY PARTNERS VII-A, L.P., By: OEP VII General Partner, L.P., its general partner, By: OEP VII GP, L.L.C., its general partner, By: /s/
Gregory Belinfanti, Authorized Person</signatureName>
        <signatureDate>2020-08-10</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>ONE EQUITY PARTNERS VII-B, L.P., By: OEP VII General Partner, L.P., its general partner, By: OEP VII GP, L.L.C., its general partner, By: /s/
Gregory Belinfanti, Authorized Person</signatureName>
        <signatureDate>2020-08-10</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>OEP VII PROJECT A CO-INVESTMENT PARTNERS, L.P., By: OEP VII General Partner, L.P., its general partner, By: OEP VII GP, L.L.C., its general
partner, By: /s/ Gregory Belinfanti, Authorized Person</signatureName>
        <signatureDate>2020-08-10</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>OEP VII GENERAL PARTNER, L.P., By: OEP VII GP, L.L.C., its general partner, By: /s/ Gregory Belinfanti, Authorized Person</signatureName>
        <signatureDate>2020-08-10</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>OEP VII GP, L.L.C., By: /s/ Gregory Belinfanti, Authorized Person</signatureName>
        <signatureDate>2020-08-10</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Richard Cashin</signatureName>
        <signatureDate>2020-08-10</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ David Han</signatureName>
        <signatureDate>2020-08-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
