| Radstock to Orbetello | 886.52 mi (1,426.72 km) |
| Radstock to Oria | 1,213.27 mi (1,952.57 km) |
| Radstock to Oristano | 948.42 mi (1,526.34 km) |
| Radstock to Orta Nova | 1,101.57 mi (1,772.81 km) |
| Radstock to Orte | 926.04 mi (1,490.31 km) |
| Radstock to Ortona | 1,004.08 mi (1,615.91 km) |
| Radstock to Orvieto | 903.46 mi (1,453.98 km) |
| Radstock to Orzinuovi | 697.84 mi (1,123.06 km) |
| Radstock to Osimo | 916.89 mi (1,475.60 km) |
| Radstock to Ospitaletto | 696.21 mi (1,120.44 km) |
| Radstock to Ostuni | 1,200.12 mi (1,931.41 km) |
| Radstock to Ottaviano | 1,081.03 mi (1,739.75 km) |
| Radstock to Ovada | 687.71 mi (1,106.76 km) |
| Radstock to Ozieri | 919.73 mi (1,480.16 km) |
| Radstock to Paceco | 1,173.98 mi (1,889.33 km) |
