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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3/A</documentType>

    <periodOfReport>2018-01-17</periodOfReport>

    <dateOfOriginalSubmission>2018-01-17</dateOfOriginalSubmission>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001634997</issuerCik>
        <issuerName>Avangrid, Inc.</issuerName>
        <issuerTradingSymbol>AGR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001727795</rptOwnerCik>
            <rptOwnerName>Herling Douglas A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE CITY CENTER, 5TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PORTLAND</rptOwnerCity>
            <rptOwnerState>ME</rptOwnerState>
            <rptOwnerZipCode>04101</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>See Remarks</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <footnotes></footnotes>

    <remarks>This amendment is being filed to include the Power of Attorney as Exhibit 24, which was inadvertently omitted from the reporting person's original Form 3.

The reporting person serves as President &amp; CEO of Central Maine Power Company</remarks>

    <ownerSignature>
        <signatureName>/s/ Susan Johnston by power of attorney</signatureName>
        <signatureDate>2018-07-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
