<SUBMISSION>
<ACCESSION-NUMBER>0001127602-15-025030
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20150814
<FILING-DATE>20150817
<DATE-OF-FILING-DATE-CHANGE>20150817
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>Bristow Group Inc
<CIK>0000073887
<ASSIGNED-SIC>4522
<IRS-NUMBER>720679819
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>0331
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>2103 CITY WEST BLVD.
<STREET2>4TH FLOOR
<CITY>HOUSTON
<STATE>TX
<ZIP>77042
<PHONE>7132677600
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>2103 CITY WEST BLVD.
<STREET2>4TH FLOOR
<CITY>HOUSTON
<STATE>TX
<ZIP>77042
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>OFFSHORE LOGISTICS INC
<DATE-CHANGED>19920703
</FORMER-COMPANY>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>Miller L. Don
<CIK>0001505027
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>001-31617
<FILM-NUMBER>151059547
</FILING-VALUES>
<MAIL-ADDRESS>
<STREET1>2000 WEST SAM HOUSTON PARKWAY S.
<STREET2>SUITE 1700
<CITY>HOUSTON
<STATE>TX
<ZIP>77042
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2015-08-14</periodOfReport>

    <issuer>
        <issuerCik>0000073887</issuerCik>
        <issuerName>Bristow Group Inc</issuerName>
        <issuerTradingSymbol>BRS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001505027</rptOwnerCik>
            <rptOwnerName>Miller L. Don</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2103 CITY WEST BLVD.</rptOwnerStreet1>
            <rptOwnerStreet2>4TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77042</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>1</isOfficer>
            <officerTitle>See Remarks</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Employee Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>39.91</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2015-08-14</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>26406</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>39.91</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2016-08-14</value>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2025-08-14</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>26406</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>26406</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Options granted on August 14, 2015 vest in three equal annual installments beginning on the first anniversary of the date of grant, but vesting of the options is contingent on the reporting person's continuous employment with the Company from the date of grant through the applicable vesting date.  Accelerated vesting in the event of a &quot;Termination without Cause&quot; of the reporting person as set forth in the Company's Management Severance Benefits Plan for U.S. Employees effective June 4, 2014 will not apply to these options.</footnote>
    </footnotes>

    <remarks>Senior Vice President and Chief Financial Officer</remarks>

    <ownerSignature>
        <signatureName>/s/ E. Chipman Earle, Attorney-in-Fact</signatureName>
        <signatureDate>2015-08-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
