Showing 1,012 registered airlines with a combined fleet of 8,797 airframes.
| Airline Name | ICAO / IATA | Fleet Size |
|---|---|---|
| Intel Air Shuttle | HGT | 2 |
| Inter-Air | ITA | 0 |
| Inter-Island Air | UGL | 0 |
| Inter-Mountain Airways | IMA | 0 |
| Inter-State Aviation | ITS | 0 |
| International Air Corporation | EXX | 0 |
| International Air Service | IAS | 0 |
| International Business Aircraft | IBY | 0 |
| International Flight Training Academy | IFX | 0 |
| International Jet Aviation Services | IJA | 9 |