Showing 1,012 registered airlines with a combined fleet of 8,827 airframes.
| Airline Name | ICAO / IATA | Fleet Size |
|---|---|---|
| Monarch Airlines | MNH | 0 |
| Mooney Aircraft Corporation | MNY | 0 |
| Morris Air Service | MSS | 0 |
| Morrison Flying Service | MRO | 0 |
| Mountain Air Cargo | MTN | 14 |
| Mountain Air Express | PKP | 1 |
| Mountain Air Service | BRR | 0 |
| Mountain Bird | MBI | 0 |
| Mountain High Aviation | MHA | 0 |
| Mountain Valley Air Service | MTV | 0 |