The IATA airport code is a three-letter code assigned to the world airports by the International Air Transport Association (IATA). These codes are used for tickets booking.
| IATA code | Number of airports |
| A... | 528 airports |
| B... | 616 airports |
| C... | 559 airports |
| D... | 297 airports |
| E... | 252 airports |
| F... | 225 airports |
| G... | 367 airports |
| H... | 311 airports |
| I... | 255 airports |
| J... | 155 airports |
| K... | 511 airports |
| L... | 467 airports |
| M... | 662 airports |
| N... | 316 airports |
| O... | 291 airports |
| P... | 510 airports |
| Q... | 28 airports |
| R... | 322 airports |
| S... | 635 airports |
| T... | 486 airports |
| U... | 196 airports |
| V... | 178 airports |
| W... | 233 airports |
| X... | 103 airports |
| Y... | 469 airports |
| Z... | 118 airports |