| Stansted Mountfitchet to Orbetello | 831.62 mi (1,338.37 km) |
| Stansted Mountfitchet to Oria | 1,141.43 mi (1,836.95 km) |
| Stansted Mountfitchet to Oristano | 920.20 mi (1,480.92 km) |
| Stansted Mountfitchet to Orta Nova | 1,032.82 mi (1,662.17 km) |
| Stansted Mountfitchet to Orte | 865.36 mi (1,392.66 km) |
| Stansted Mountfitchet to Ortona | 935.48 mi (1,505.52 km) |
| Stansted Mountfitchet to Orvieto | 842.68 mi (1,356.16 km) |
| Stansted Mountfitchet to Orzinuovi | 630.68 mi (1,014.99 km) |
| Stansted Mountfitchet to Osimo | 845.99 mi (1,361.49 km) |
| Stansted Mountfitchet to Ospitaletto | 627.17 mi (1,009.33 km) |
| Stansted Mountfitchet to Ostuni | 1,127.51 mi (1,814.55 km) |
| Stansted Mountfitchet to Ottaviano | 1,019.13 mi (1,640.13 km) |
| Stansted Mountfitchet to Ovada | 633.56 mi (1,019.61 km) |
| Stansted Mountfitchet to Ozieri | 886.23 mi (1,426.24 km) |
| Stansted Mountfitchet to Paceco | 1,131.97 mi (1,821.74 km) |
