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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2013-09-10</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001575571</issuerCik>
        <issuerName>LIN Media LLC</issuerName>
        <issuerTradingSymbol>LIN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001447294</rptOwnerCik>
            <rptOwnerName>Schmaeling Richard J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O LIN MEDIA LLC</rptOwnerStreet1>
            <rptOwnerStreet2>ONE WEST EXCHANGE STREET, SUITE 5A</rptOwnerStreet2>
            <rptOwnerCity>PROVIDENCE</rptOwnerCity>
            <rptOwnerState>RI</rptOwnerState>
            <rptOwnerZipCode>02903</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Sr. VP Chief Financial Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2013-09-10</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>43000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>17.03</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>243228</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Shares were awarded pursuant to the amended and restated 2002 Non-Employee Director Stock Plan. The shares are subject to forfeiture and are non-transferable until vested. The shares vest in three (3) annual installments from the date of grant. Twenty five percent (25%) of the shares vest upon the first and second anniversary, the remaining fifty percent (50%) vests on the third anniversary of the date of grant.</footnote>
        <footnote id="F2">This number includes 141,776 restricted shares awarded pursuant to the amended and restated 2002 Non-Employee Director Stock Plan. These shares remain subject to forfeiture and are nontransferable until vested. The shares vest over either three (3) or four (4) years from the date of grant..</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Nicholas N. Mohamed, Attorney-in-fact for Richard J. Schmaeling</signatureName>
        <signatureDate>2013-09-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
