<SUBMISSION>
<ACCESSION-NUMBER>0001209191-09-048095
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20090929
<FILING-DATE>20091008
<DATE-OF-FILING-DATE-CHANGE>20091008
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>bin Abdullah bin Abdulrahman Khalid
<CIK>0001473960
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>001-33963
<FILM-NUMBER>091111998
</FILING-VALUES>
<MAIL-ADDRESS>
<STREET1>C/O BARALONCO LIMITED
<STREET2>CRAIGMUIR CHAMBERS, PO BOX 71
<CITY>ROAD TOWN, TORTOLA
<STATE>D8
<ZIP>VG1110
</MAIL-ADDRESS>
</REPORTING-OWNER>
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>Iridium Communications Inc.
<CIK>0001418819
<ASSIGNED-SIC>3669
<IRS-NUMBER>221344998
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>6707 DEMOCRACY BOULEVARD
<STREET2>SUITE 300
<CITY>BETHESDA
<STATE>MD
<ZIP>20817
<PHONE>301-571-6200
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>6707 DEMOCRACY BOULEVARD
<STREET2>SUITE 300
<CITY>BETHESDA
<STATE>MD
<ZIP>20817
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>GHL Acquisition Corp.
<DATE-CHANGED>20071119
</FORMER-COMPANY>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>Baralonco Ltd
<CIK>0001473963
<STATE-OF-INCORPORATION>D8
<FISCAL-YEAR-END>1231
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>001-33963
<FILM-NUMBER>091111999
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>CRAIGMUIR CHAMBERS
<STREET2>PO BOX 71
<CITY>ROAD TOWN, TORTOLA
<STATE>D8
<ZIP>VG 1110
<PHONE>284-494-2233
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>CRAIGMUIR CHAMBERS
<STREET2>PO BOX 71
<CITY>ROAD TOWN, TORTOLA
<STATE>D8
<ZIP>VG 1110
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2009-09-29</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001418819</issuerCik>
        <issuerName>Iridium Communications Inc.</issuerName>
        <issuerTradingSymbol>IRDM</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001473963</rptOwnerCik>
            <rptOwnerName>Baralonco Ltd</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>P.O. BOX 71, ROAD TOWN</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>TORTOLA</rptOwnerCity>
            <rptOwnerState>D8</rptOwnerState>
            <rptOwnerZipCode>VG1110</rptOwnerZipCode>
            <rptOwnerStateDescription>VIRGIN ISLANDS, BRITISH</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001473960</rptOwnerCik>
            <rptOwnerName>bin Abdullah bin Abdulrahman Khalid</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>P.O. BOX 71, ROAD TOWN, TORTOLA</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BRITISH VIRGIN ISLANDS</rptOwnerCity>
            <rptOwnerState>D8</rptOwnerState>
            <rptOwnerZipCode>VG1110</rptOwnerZipCode>
            <rptOwnerStateDescription>VIRGIN ISLANDS, BRITISH</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2009-09-29</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1000000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>11648080</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This Form 4 is a joint filing with the sole owner of Baralonco Limited, Khalid bin Abdullah bin Abdulrahman, at the same business address. The joint filer is the Indirect Owner of the same shares as to which Baralonco Limited is the Direct Owner.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Steven B. Pfeiffer, Attorney-in-fact</signatureName>
        <signatureDate>2009-10-08</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Steven B. Pfeiffer, Attorney-in-fact</signatureName>
        <signatureDate>2009-10-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
