| 1 | MML | Mongolian Airlines Group | IATA: MR, Callsign: Trans Mongolia, IATA Prefix: 861, Name changed to Hunnu Air | MGL | AVCODES |
| 2 | MML | Manchester Metrolink | City: Manchester | GB | TRAFFIC |
| 3 | MML | Midland Main Line | | UK | VKM |
| 4 | MMLA | MICHIGAN METAL TRANSPORTERS INC | | | SCAC4 |
| 5 | MMLB | M & M LOGISTICS | | | SCAC4 |
| 6 | MMLC | UNITED STATES LINES, INC. | | | PWRC |
| 7 | MMLC | UNITED STATES LINES, INC. | | | SCAC3 |
| 8 | MMLD | MOLD-MASTERS (2007) LIMITED | | | SCAC4 |
| 9 | MMLJ | MARITECH MARINE LTD | | | SCAC4 |
| 10 | MMLL | MCMULLENS TRANSFER INC | | | SCAC4 |
| 11 | MMLM | MIDA MARITIME LIMITED | | | SCAC4 |
| 12 | MMLN | MOMETAL STRUCTURES INC | | | SCAC4 |
| 13 | MMLP | MARC MEX LLC | | | SCAC4 |
| 14 | MMLQ | MILLER, MICHELLE LLC | | | SCAC4 |
| 15 | MMLS | MARTIN MOTOR LINES, INC | | | SCAC1 |
| 16 | MMLU | CFL MULTIMODAL SA | | L | BIC |
| 17 | MMLU | UNITED STATES LINES, INC. | | | SCAC3 |
| 18 | MMLU | CFL MULTIMODAL SA | | | SCAC4 |
| 19 | MMLV | MARCUS MOTORSPORTS LLC | | | SCAC4 |
| 20 | MMLW | M & M LOGISTICS INCORPORATED | | | SCAC4 |
