| Document And Entity Information | Jan. 10, 2024 |
| Cover [Abstract] | |
| Entity Registrant Name | MESA AIR GROUP, INC. |
| Amendment Flag | true |
| Entity Central Index Key | 0000810332 |
| Document Type | 8-K/A |
| Document Period End Date | Jan. 10, 2024 |
| Entity Incorporation, State or Country Code | NV |
| Securities Act File Number | 001-38626 |
| Entity Tax Identification Number | 85-0302351 |
| Entity Address, Address Line One | 410 North 44th Street |
| Entity Address, Address Line Two | Suite 700 |
| Entity Address, City or Town | Phoenix |
| Entity Address, State or Province | AZ |
| Entity Address, Postal Zip Code | 85008 |
| City Area Code | (602) |
| Local Phone Number | 685-4000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, no par value |
| Trading Symbol | MESA |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Amendment Description | This Amendment No. 1 to the Current Report on Form 8-K amends Item 9.01 of the Current Report on Form 8-K of Mesa Air Group, Inc. (the “Company”) filed on January 9, 2024 (the “Original Form 8-K”) solely to correct the press release link in the Original Form 8-K (the “Exhibit”). The link in the Original Form 8-K does not refer to the Company’s press release. This error has been corrected in the refiled Exhibit 99.1 to this Amendment No. 1 to refer to the Company’s press release issued on such date. No other changes have been made to the Original Form 8-K. |
