Showing 394 registered airlines with a combined fleet of 1,328 airframes.
| Airline Name | ICAO / IATA | Fleet Size |
|---|---|---|
| One Air | HGO / HC | 5 |
| OpenSkies | BOS | 0 |
| Oxaero | OXE | 0 |
| Oxford Air Services | WDK | 0 |
| Oxford Aviation Academy | OXF | 21 |
| Palmer Aviation | JSP | 1 |
| Paragon Global Flight Support | PGF | 0 |
| Patriot Aviation Limited | BYT | 0 |
| Peach Air | KGC | 0 |
| Pen-Avia | PDY | 1 |