| English | eng-000 |
| by airmail | |
| català | cat-000 | per avió |
| čeština | ces-000 | leteckou poštou |
| Middle Cornish | cnx-000 | der ayrbost |
| Kernowek | cor-000 | der ayrbost |
| eesti | ekk-000 | lennupostiga |
| ελληνικά | ell-000 | αεροπορικώς |
| English | eng-000 | by air |
| English | eng-000 | by plane |
| français | fra-000 | par avion |
| interlingua | ina-000 | per avion |
| interlingua | ina-000 | via aeree |
| Old Cornish | oco-000 | der ayrbost |
| русский | rus-000 | воздушной почтой |