| Tavistock to Orbetello | 917.66 mi (1,476.84 km) |
| Tavistock to Oria | 1,255.03 mi (2,019.78 km) |
| Tavistock to Oristano | 958.93 mi (1,543.26 km) |
| Tavistock to Orta Nova | 1,141.53 mi (1,837.12 km) |
| Tavistock to Orte | 961.14 mi (1,546.81 km) |
| Tavistock to Ortona | 1,044.58 mi (1,681.08 km) |
| Tavistock to Orvieto | 938.86 mi (1,510.95 km) |
| Tavistock to Orzinuovi | 740.43 mi (1,191.61 km) |
| Tavistock to Osimo | 959.84 mi (1,544.71 km) |
| Tavistock to Ospitaletto | 740.21 mi (1,191.25 km) |
| Tavistock to Ostuni | 1,242.55 mi (1,999.69 km) |
| Tavistock to Ottaviano | 1,115.85 mi (1,795.78 km) |
| Tavistock to Ovada | 720.97 mi (1,160.28 km) |
| Tavistock to Ozieri | 934.50 mi (1,503.93 km) |
| Tavistock to Paceco | 1,192.97 mi (1,919.90 km) |
