| Airline Name | Image | Swaps |
| Oasis International Airlines-Spain: Design 4 |
| yes |
| Ocean Air-Brazil: Design 1 |
| yes |
| Olympic Airways-Greece: Design 4 |
| yes |
| Olympic Airways-Greece: Design 5 |
| yes |
| Olympic Airways-Greece: Design 6 |
| yes |
| Olympic Airways-Greece: Design 7 |
| yes |
| Olympic Airways-Greece: Design 8 |
| yes |
| Olympic Airways-Greece: Design 9 |
| yes |
| Olympic Airways-Greece: Design-12 |
| yes |
| Olympic Airways-Greece: Design-13 |
| yes |
| Oman Air-Oman: Design 2 |
| yes |
| Oman Air-Oman: Design 5 |
| yes |
| Oman Air-Oman: Design 6 |
| yes |
| Oman Air-Oman: Design 7 |
| yes |
| Oman Air-Oman: Design 8 |
| yes |
| Oman Air-Oman: Design 9 |
| yes |
| Onur Air-Turkey: Design 3 |
| yes |
| Onur Air-Turkey: Design 5 |
| yes |
| Orion Airways-UK: Design 1 |
| yes |
| Orion Airways-UK: Design 2 |
| yes |
