| Clevedon to Orbetello | 906.49 mi (1,458.85 km) |
| Clevedon to Oria | 1,233.45 mi (1,985.04 km) |
| Clevedon to Oristano | 967.18 mi (1,556.53 km) |
| Clevedon to Orta Nova | 1,121.74 mi (1,805.27 km) |
| Clevedon to Orte | 946.12 mi (1,522.64 km) |
| Clevedon to Ortona | 1,024.25 mi (1,648.37 km) |
| Clevedon to Orvieto | 923.55 mi (1,486.31 km) |
| Clevedon to Orzinuovi | 718.01 mi (1,155.53 km) |
| Clevedon to Osimo | 937.07 mi (1,508.07 km) |
| Clevedon to Ospitaletto | 716.39 mi (1,152.92 km) |
| Clevedon to Ostuni | 1,220.30 mi (1,963.88 km) |
| Clevedon to Ottaviano | 1,101.12 mi (1,772.09 km) |
| Clevedon to Ovada | 707.71 mi (1,138.95 km) |
| Clevedon to Ozieri | 938.81 mi (1,510.87 km) |
| Clevedon to Paceco | 1,193.40 mi (1,920.60 km) |
