    <SEC-DOCUMENT>0001193125-19-326568-index.html : 20191231
    <SEC-HEADER>0001193125-19-326568.hdr.sgml : 20191231
    <ACCEPTANCE-DATETIME>20191231145633
    ACCESSION NUMBER:		0001193125-19-326568
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		9
    CONFORMED PERIOD OF REPORT:	20200204
    FILED AS OF DATE:		20191231
    DATE AS OF CHANGE:		20191231
    EFFECTIVENESS DATE:		20191231

    FILER:

    	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

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-38626
    		FILM NUMBER:		191319240

    	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>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>d849874ddef14a.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: d849874ddef14a.htm

    </DOCUMENT>
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    <SEQUENCE>2
    <FILENAME>g849874g03y75.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: g849874g03y75.jpg

    </DOCUMENT>
    <DOCUMENT>
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    <SEQUENCE>3
    <FILENAME>g849874g12x41.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: g849874g12x41.jpg

    </DOCUMENT>
    <DOCUMENT>
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    <SEQUENCE>4
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: g849874g28n00.jpg

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    <DOCUMENT>
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    <SEQUENCE>5
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: g849874g28v43.jpg

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    <DOCUMENT>
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    <SEQUENCE>6
    <FILENAME>g849874g71o86.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: g849874g71o86.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>g849874g71x50.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: g849874g71x50.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>g849874g89d88.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: g849874g89d88.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>g849874g96d50.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: g849874g96d50.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>