Showing 154 registered airlines with a combined fleet of 452 airframes.
| Airline Name | ICAO / IATA | Fleet Size |
|---|---|---|
| Helipistas | HLP | 0 |
| Iberia Airlines | IBE / IB | 58 |
| Iberia Express | IBS / I2 | 15 |
| Ibertour Servicios Aéreos | IBR | 0 |
| Ibertrans Aérea | IBT | 0 |
| Iberworld | IWD / TY | 0 |
| Ibicenca Air | IBC | 0 |
| Industrias Titan | ITN | 1 |
| Infinit Air | FFI | 0 |
| Instituto Cartografico de Cataluna | ICC | 0 |