Showing 1,012 registered airlines with a combined fleet of 8,751 airframes.
| Airline Name | ICAO / IATA | Fleet Size |
|---|---|---|
| Date Transformation Corp | XDT | 0 |
| Dawn Air | DWN | 0 |
| DayJet | DJS | 0 |
| Decatur Aviation | DAA | 0 |
| Deere and Company | JDC | 1 |
| Delaware Skyways | DWR | 0 |
| Delta Air Elite | ELJ | 2 |
| Delta Air Lines | DAL / DL | 771 |
| Delta Private Jets | DPJ | 3 |
| Delta State University | DSU | 0 |