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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2020-01-23</periodOfReport>

    <dateOfOriginalSubmission>2020-01-27</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000922224</issuerCik>
        <issuerName>PPL Corp</issuerName>
        <issuerTradingSymbol>PPL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001656784</rptOwnerCik>
            <rptOwnerName>Raphael Joanne H</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>TWO NORTH NINTH STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ALLENTOWN</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>18101</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>EVP, GC &amp; Corp Sec</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Performance Stock Unit (SIP)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2020-01-23</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>15892.343</value>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>15892.343</value>
                    <footnoteId id="F3"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                    <footnoteId id="F4"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">No conversion or exercise price or exercise or expiration date applies.</footnote>
        <footnote id="F2">This amended Form 4 restates the number of performance units forfeited on 01/23/2020. On 01/23/2020, only one of two 2017 grants were forfeited due to Company performance below minimum &quot;total shareowner return&quot; threshold at expiration of the applicable three-year performance period. The other 2017 grant, being reinstated by this report, earned a 200% payout based on the Company's return-on-equity over a three-year performance period. The payout of this 2017 award will be reported on or about 02/18/2020 following calculation of underlying shares to be delivered, net of withholding.</footnote>
        <footnote id="F3">Total includes the reinvestment of dividends.</footnote>
        <footnote id="F4">As of 02/07/2020, total performance units beneficially owned is 83,473.307. This total includes the 01/26/2017 grant of 5,297.447 performance units, the 01/25/2018 grants of 12,676.763 and 12,676.763 performance units, the 01/24/2019 grants of 13,835.158 and 13,835.158 performance units, and the 06/14/2019 grants of 657.009 and 657.009 performance units, plus in each case, the incremental addition of performance units credited to the original grant in amounts equal to dividend equivalents deemed earned on shares underlying such performance units, and the 01/23/2020 grants of 11,919 and 11,919 performance units.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/Frederick C. Paine, as Attorney-In-Fact for Joanne H. Raphael</signatureName>
        <signatureDate>2020-02-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
