Showing 1,012 registered airlines with a combined fleet of 8,756 airframes.
| Airline Name | ICAO / IATA | Fleet Size |
|---|---|---|
| Denver Express | FEC | 0 |
| Diamond Aviation | SPK | 0 |
| Digital Equipment Corporation | DGT | 0 |
| Direct Air | DIA | 0 |
| Direct Air trading as Midway Connection | XAP | 0 |
| Discover Air | DCV | 0 |
| Discovery Airways | DVA / DH | 0 |
| Dispatch Services | XDS | 0 |
| Dixie Airways | DEE | 0 |
| Dolphin Express Airlines | IXX | 0 |