| 1 | MTD | Macknight Airlines | | AUS | AVCODES |
| 2 | MTD | MetroJets, LLC | IATA: 7N, Callsign: Matador, IATA Prefix: 007, | USA | AVCODES |
| 3 | MTD | MacKnight Airlines | | | ICAO1 |
| 4 | MTDA | MTL WORLDWODE AGENCY INC | | | SCAC4 |
| 5 | MTDB | METROPOLITAN TRANSIT DEVELOPMENT BOARD | | | PWRC |
| 6 | MTDD | MID-ATLANTIC TRANSPORTATION INC | | | SCAC4 |
| 7 | MTDI | MITCO LIMITED | | | SCAC4 |
| 8 | MTDJ | MIG TRANSPORT INC | | | SCAC4 |
| 9 | MTDK | MTD TRUCKING | | | SCAC4 |
| 10 | MTDO | METRO DELIVERY INC | | | SCAC4 |
| 11 | MTDU | LLC «MODULTRANS» | | RUS | BIC |
| 12 | MTDX | Midwest Transportation & Development Corp. | added 4/2001; eliminated 10/2002; 7/2005 (not listed) | | NAKINA |
| 13 | MTDX | Midwest Transportation & Development Corp. | added 4/2001 | | NRHS |
| 14 | MTDX | MIDWEST TRANSPORTATION & DEVELOPMENT CORP. | | | PWRC |
| 15 | MTDX | Midwest Transportation and Development | | | RSRV |
| 16 | MTDX | MIDWEST TRANSPORTATION & | | | SCAC4 |
