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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2016-02-17</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001647509</issuerCik>
        <issuerName>Forest City Realty Trust, Inc.</issuerName>
        <issuerTradingSymbol>FCEA/FCEB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001666951</rptOwnerCik>
            <rptOwnerName>Kevin Ratner 1986 Trust Agreement dated December 18, 1986</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>50 PUBLIC SQUARE, SUITE 1600</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CLEVELAND</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>44113</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Member of 10% Group</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2016-02-17</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>6000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>14089</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class B Common Convertible</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>187327</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Performance Shares Award-granted 4/11/2012- performance period is from February 1, 2012 to December 31, 2015. Awards will be available to the grantee at the end of the performance period provided that certain performance criteria are met. The actual number of shares earned could range from 0 to 200% of the number of Performance Shares granted. Fair market value on date of grant is $14.74 per share. Shares vested and were approved by the Company's Compensation Committee on 2/17/2016, at 124.67% of the target shares resulting from the actual performance during the performance period.</footnote>
        <footnote id="F2">Stocks are convertible from Class B Common to Class A Common on 1-for-1 basis</footnote>
    </footnotes>

    <remarks>The reporting person is a party of the Ratner, Miller &amp; Shafran Shareholders Agreement, dated 12/20/2013 (the &quot;Agreement&quot;). As a result of the terms of the Agreement and the beneficial ownership of all parties thereto, the reporting person may be deemed to be a member of a &quot;group&quot;, within the meaning of Section 13(d)(3) of the Securities Exchange Act of 1934, that owns more than 10% of the outstanding shares of Class B Common Stock of the Issuer.</remarks>

    <ownerSignature>
        <signatureName>By: Mark Tepsich, Attorney-In-Fact For Kevin Ratner1986 Trust Agreement dated December 18, 1986</signatureName>
        <signatureDate>2016-03-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
