| Bletchley to Orbetello | 863.79 mi (1,390.14 km) |
| Bletchley to Oria | 1,177.38 mi (1,894.81 km) |
| Bletchley to Oristano | 945.96 mi (1,522.37 km) |
| Bletchley to Orta Nova | 1,068.12 mi (1,718.97 km) |
| Bletchley to Orte | 898.85 mi (1,446.55 km) |
| Bletchley to Ortona | 970.68 mi (1,562.16 km) |
| Bletchley to Orvieto | 876.16 mi (1,410.05 km) |
| Bletchley to Orzinuovi | 665.19 mi (1,070.52 km) |
| Bletchley to Osimo | 881.55 mi (1,418.72 km) |
| Bletchley to Ospitaletto | 662.06 mi (1,065.49 km) |
| Bletchley to Ostuni | 1,163.60 mi (1,872.63 km) |
| Bletchley to Ottaviano | 1,053.03 mi (1,694.68 km) |
| Bletchley to Ovada | 665.19 mi (1,070.51 km) |
| Bletchley to Ozieri | 913.30 mi (1,469.81 km) |
| Bletchley to Paceco | 1,161.46 mi (1,869.19 km) |
