| Bristol to Orbetello | 898.47 mi (1,445.94 km) |
| Bristol to Oria | 1,224.42 mi (1,970.52 km) |
| Bristol to Oristano | 961.13 mi (1,546.79 km) |
| Bristol to Orta Nova | 1,112.89 mi (1,791.02 km) |
| Bristol to Orte | 937.73 mi (1,509.13 km) |
| Bristol to Ortona | 1,015.38 mi (1,634.09 km) |
| Bristol to Orvieto | 915.14 mi (1,472.78 km) |
| Bristol to Orzinuovi | 709.09 mi (1,141.16 km) |
| Bristol to Osimo | 928.02 mi (1,493.50 km) |
| Bristol to Ospitaletto | 707.34 mi (1,138.36 km) |
| Bristol to Ostuni | 1,211.22 mi (1,949.27 km) |
| Bristol to Ottaviano | 1,092.71 mi (1,758.55 km) |
| Bristol to Ovada | 699.60 mi (1,125.90 km) |
| Bristol to Ozieri | 932.34 mi (1,500.46 km) |
| Bristol to Paceco | 1,186.43 mi (1,909.37 km) |
