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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-01-02</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001668428</issuerCik>
        <issuerName>FGL Holdings</issuerName>
        <issuerTradingSymbol>FG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001393818</rptOwnerCik>
            <rptOwnerName>Blackstone Group L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>345 PARK AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10154</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001404071</rptOwnerCik>
            <rptOwnerName>Blackstone Group Management L.L.C.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O THE BLACKSTONE GROUP L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>345 PARK AVENUE</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10154</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001070844</rptOwnerCik>
            <rptOwnerName>SCHWARZMAN STEPHEN A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O THE BLACKSTONE GROUP L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>345 PARK AVENUE</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10154</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Ordinary Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2019-01-02</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>18328</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>30816</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F15"/>
                    <footnoteId id="F16"/>
                    <footnoteId id="F17"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Ordinary Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>14628906</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F3"/>
                    <footnoteId id="F5"/>
                    <footnoteId id="F15"/>
                    <footnoteId id="F16"/>
                    <footnoteId id="F17"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Ordinary Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>22500000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                    <footnoteId id="F15"/>
                    <footnoteId id="F16"/>
                    <footnoteId id="F17"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Ordinary Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>142111</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F6"/>
                    <footnoteId id="F15"/>
                    <footnoteId id="F16"/>
                    <footnoteId id="F17"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Ordinary Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4147302</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F7"/>
                    <footnoteId id="F14"/>
                    <footnoteId id="F15"/>
                    <footnoteId id="F16"/>
                    <footnoteId id="F17"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Ordinary Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1442118</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F8"/>
                    <footnoteId id="F14"/>
                    <footnoteId id="F15"/>
                    <footnoteId id="F16"/>
                    <footnoteId id="F17"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Ordinary Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>50912</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F9"/>
                    <footnoteId id="F14"/>
                    <footnoteId id="F15"/>
                    <footnoteId id="F16"/>
                    <footnoteId id="F17"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Ordinary Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>165079</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F10"/>
                    <footnoteId id="F14"/>
                    <footnoteId id="F15"/>
                    <footnoteId id="F16"/>
                    <footnoteId id="F17"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Ordinary Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>52541</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F11"/>
                    <footnoteId id="F14"/>
                    <footnoteId id="F15"/>
                    <footnoteId id="F16"/>
                    <footnoteId id="F17"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Ordinary Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>113921</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F12"/>
                    <footnoteId id="F14"/>
                    <footnoteId id="F15"/>
                    <footnoteId id="F16"/>
                    <footnoteId id="F17"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Ordinary Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>24016</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F13"/>
                    <footnoteId id="F14"/>
                    <footnoteId id="F15"/>
                    <footnoteId id="F16"/>
                    <footnoteId id="F17"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">On January 2, 2019, Menes Chee was granted 18,328 restricted stock units under the Issuer's 2017 Omnibus Incentive Plan, which is scheduled to vest on December 31, 2019 subject to the continuous existence of a service relationship through the vesting date.</footnote>
        <footnote id="F2">Mr. Chee is an officer of an affiliate of The Blackstone Group L.P. (&quot;Blackstone&quot;). Pursuant to arrangements between Mr. Chee and Blackstone, Mr. Chee is required to transfer to Blackstone any and all compensation received in connection with his directorship for any company Blackstone invests in or advises. Blackstone has designated Blackstone Tactical Opportunities Advisors L.L.C. (&quot;BTOA&quot;) as the entity to receive the securities described herein.  BTOA is an indirect subsidiary of Blackstone.</footnote>
        <footnote id="F3">Reflects securities directly held by CFS Holdings (Cayman), L.P. (&quot;CFS 1&quot;).</footnote>
        <footnote id="F4">Reflects securities directly held by CFS Holdings II (Cayman), L.P. (&quot;CFS 2&quot;).</footnote>
        <footnote id="F5">CFS Holdings (Cayman) Manager L.L.C. (&quot;CFS Cayman Manager&quot;) is the general partner of CFS 1 and CFS 2. The Managing Member of CFS Cayman Manager is Blackstone Tactical Opportunities LR Associates-B (Cayman) Ltd. (&quot;BTO Cayman&quot;). The controlling shareholder of BTO Cayman is Blackstone Holdings III L.P. (&quot;Blackstone Holdings III&quot;). The general partner of Blackstone Holdings III is Blackstone Holdings III GP L.P. (&quot;Blackstone Holdings III GP&quot;). The general partner of Blackstone Holdings III GP is Blackstone Holdings III GP Management L.L.C. (&quot;Blackstone Holdings III LLC&quot;).</footnote>
        <footnote id="F6">Reflects securities directly held by GSO Aiguille des Grands Montets Fund II LP (&quot;Aiguille Fund&quot;). GSO Capital Partners LP (&quot;GSO Partners&quot;) is the investment manager of Aiguille Fund. GSO Advisor Holdings L.L.C. (&quot;GSO Holdings&quot;) is the special limited partner of GSO Partners with the investment and voting power over the securities beneficially owned by GSO Partners. Blackstone Holdings I L.P. (&quot;Blackstone Holdings I&quot;) is the sole member of GSO Holdings. Blackstone Holdings I/II GP Inc. (&quot;Blackstone Holdings I/II GP&quot;) is the general partner of Blackstone Holdings I.</footnote>
        <footnote id="F7">Reflects securities directly held by GSO COF III AIV-5 LP (&quot;GSO AIV-5&quot;). GSO Capital Opportunities Associates III LLC (&quot;GSO III LLC&quot;) is the general partner of GSO AIV-5.</footnote>
        <footnote id="F8">Reflects securities directly held by GSO COF III Co-Investment AIV-5 LP (&quot;GSO COF AIV-5&quot;). GSO COF III Co-Investment Associates LLC (&quot;GSO COF AIV-5 LLC&quot;) is the general partner of GSO COF AIV-5.</footnote>
        <footnote id="F9">Reflects securities directly held by GSO Co-Investment Fund-D LP (&quot;GSO D&quot;). GSO Co-Investment Fund-D Associates LLC (&quot;GSO D LLC&quot;) is the general partner of GSO D.</footnote>
        <footnote id="F10">Reflects securities directly held by GSO Credit Alpha Fund LP (&quot;GSO Alpha&quot;). GSO Credit Alpha Associates LLC (&quot;GSO Alpha LLC&quot;) is the general partner of GSO Alpha.</footnote>
        <footnote id="F11">Reflects securities directly held by GSO Churchill Partners LP (&quot;GSO Churchill&quot;). GSO Churchill Associates LLC (&quot;GSO Churchill LLC&quot;) is the general partner of GSO Churchill.</footnote>
        <footnote id="F12">Reflects securities directly held by GSO Credit-A Partners LP (&quot;GSO Credit-A&quot;). GSO Credit-A Associates LLC (&quot;GSO Credit-A LLC&quot;) is the general partner of GSO Credit-A.</footnote>
        <footnote id="F13">Reflects securities directly held by GSO Harrington Credit Alpha Fund (Cayman) L.P. (&quot;GSO Harrington&quot;, and collectively, with Aiguille Fund, GSO AIV-V, GSO COF AIV-5, GSO D, GSO Alpha, GSO Churchill and GSO Credit-A, the &quot;GSO Funds&quot;). GSO Harrington Credit Alpha Associates L.L.C. (&quot;GSO Harrington LLC&quot;) is the general partner of GSO Harrington.</footnote>
        <footnote id="F14">GSO Holdings I L.L.C. (&quot;GSO Holdings I&quot;) is the managing member of each of GSO III LLC, GSO COF AIV-5 LLC, GSO D LLC, GSO Alpha LLC, GSO Churchill LLC, GSO Credit-A LLC and GSO Harrington LLC. Blackstone Holdings II L.P. (&quot;Blackstone Holdings II&quot;) is the managing member of GSO Holdings I with respect to securities beneficially owned by the GSO Funds. Blackstone Holdings I/II GP is the general partner of Blackstone Holdings II.</footnote>
        <footnote id="F15">Blackstone is the controlling shareholder of Blackstone Holdings I/II GP and the sole member of Blackstone Holdings III LLC. Blackstone Group Management L.L.C. (&quot;Blackstone Management&quot;) is the general partner of Blackstone. Blackstone Management is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman. In addition, Bennett J. Goodman may be deemed to have shared voting power and/or investment power with respect to the securities held by the GSO Funds.</footnote>
        <footnote id="F16">Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.</footnote>
        <footnote id="F17">Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>THE BLACKSTONE GROUP L.P., By: Blackstone Group Management L.L.C., its general partner, By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer</signatureName>
        <signatureDate>2019-04-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>BLACKSTONE GROUP MANAGEMENT L.L.C., By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer</signatureName>
        <signatureDate>2019-04-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Stephen A. Schwarzman</signatureName>
        <signatureDate>2019-04-19</signatureDate>
    </ownerSignature>
</ownershipDocument>
