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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2019-06-27</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001743881</issuerCik>
        <issuerName>BridgeBio Pharma, Inc.</issuerName>
        <issuerTradingSymbol>BBIO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001209181</rptOwnerCik>
            <rptOwnerName>MOMTAZEE JAMES C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O KOHLBERG KRAVIS ROBERTS &amp; CO. L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>2800 SAND HILL ROAD, SUITE 200</rptOwnerStreet2>
            <rptOwnerCity>MENLO PARK</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94025</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <footnotes></footnotes>

    <remarks>Exhibit 24.1 - Power of Attorney.  Mr. Momtazee, an executive of Kohlberg Kravis Roberts &amp; Co. L.P. (&quot;KKR&quot;), is a member of the board of directors of BridgeBio Pharma, Inc. (the &quot;Issuer&quot;). Certain affiliates of KKR have filed a separate Form 3 reporting securities of the Issuer that they may be deemed to beneficially own. Mr. Momtazee disclaims beneficial ownership of any securities of the Issuer that may be deemed to be beneficially owned by affiliates of KKR.</remarks>

    <ownerSignature>
        <signatureName>/s/ Ralph Scarborough, as attorney-in-fact</signatureName>
        <signatureDate>2019-06-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
