<SEC-DOCUMENT>0001209191-20-033893.txt : 20200603
<SEC-HEADER>0001209191-20-033893.hdr.sgml : 20200603
<ACCEPTANCE-DATETIME>20200603142919
ACCESSION NUMBER:		0001209191-20-033893
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20200601
FILED AS OF DATE:		20200603
DATE AS OF CHANGE:		20200603

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			GILLMAN BRIAN S
		CENTRAL INDEX KEY:			0001091909

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38626
		FILM NUMBER:		20939653

	MAIL ADDRESS:	
		STREET 1:		410 N. 44TH STREET, SUITE 700
		CITY:			PHOENIX
		STATE:			AZ
		ZIP:			85008

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MESA AIR GROUP INC
		CENTRAL INDEX KEY:			0000810332
		STANDARD INDUSTRIAL CLASSIFICATION:	AIR TRANSPORTATION, SCHEDULED [4512]
		IRS NUMBER:				850302351
		STATE OF INCORPORATION:			NV
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		410 NORTH 44TH STREET
		STREET 2:		SUITE 700
		CITY:			PHOENIX
		STATE:			AZ
		ZIP:			85008
		BUSINESS PHONE:		602.685.4000

	MAIL ADDRESS:	
		STREET 1:		410 NORTH 44TH STREET
		STREET 2:		SUITE 700
		CITY:			PHOENIX
		STATE:			AZ
		ZIP:			85008

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MESA AIRLINES INC
		DATE OF NAME CHANGE:	19950426
</SEC-HEADER>
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<TYPE>4
<SEQUENCE>1
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<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
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    <issuer>
        <issuerCik>0000810332</issuerCik>
        <issuerName>MESA AIR GROUP INC</issuerName>
        <issuerTradingSymbol>MESA</issuerTradingSymbol>
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            <rptOwnerName>GILLMAN BRIAN S</rptOwnerName>
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            <rptOwnerStreet1>410 44TH STREET, SUITE 700</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PHOENIX</rptOwnerCity>
            <rptOwnerState>AZ</rptOwnerState>
            <rptOwnerZipCode>85008</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>EVP/GC/Secretary</officerTitle>
        </reportingOwnerRelationship>
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            <ownershipNature>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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                <value>2020-06-01</value>
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            <expirationDate>
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                <transactionCode>M</transactionCode>
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                <value></value>
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                <transactionShares>
                    <value>4568</value>
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                <transactionPricePerShare>
                    <value>0.00</value>
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                <transactionAcquiredDisposedCode>
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                    <value>D</value>
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        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Award</value>
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                <value>2020-06-01</value>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness>
                <value></value>
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            <transactionAmounts>
                <transactionShares>
                    <value>59701</value>
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                <transactionPricePerShare>
                    <value>0.00</value>
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                <transactionAcquiredDisposedCode>
                    <value>A</value>
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                <value>2021-06-01</value>
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            <expirationDate>
                <footnoteId id="F3"/>
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                <underlyingSecurityTitle>
                    <value>Common Stock</value>
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                    <value>59701</value>
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                <sharesOwnedFollowingTransaction>
                    <value>89629</value>
                </sharesOwnedFollowingTransaction>
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                    <value>D</value>
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        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">A restricted stock award of 92,437 was granted under the 2018 Equity Incentive Plan on August 10, 2018. Additional tranches of this award will vest as follows: 5,707 shares on June 1, 2021; and 7,500 shares on July 21, 2020. An additional restricted stock award of 7,583 was granted under the 2018 Equity Incentive Plan on July 15, 2019 and will vest on July 15, 2020.</footnote>
        <footnote id="F2">A restricted stock award of 13,706 was granted under the 2018 Equity Incentive Plan on June 1, 2019. Additional tranches of this award will vest as follows: 4,568 shares on June 1, 2021; and 4,570 on June 1, 2022.</footnote>
        <footnote id="F3">A restricted stock award of 59,701 was granted under the 2018 Equity Incentive Plan on June 1, 2020. Tranches of this award will vest annually in equal one third increments.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Brian Gillman</signatureName>
        <signatureDate>2020-06-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
