| Thornbury to Orbetello | 902.78 mi (1,452.89 km) |
| Thornbury to Oria | 1,227.20 mi (1,974.99 km) |
| Thornbury to Oristano | 967.70 mi (1,557.36 km) |
| Thornbury to Orta Nova | 1,115.95 mi (1,795.96 km) |
| Thornbury to Orte | 941.53 mi (1,515.25 km) |
| Thornbury to Ortona | 1,018.42 mi (1,638.99 km) |
| Thornbury to Orvieto | 918.92 mi (1,478.86 km) |
| Thornbury to Orzinuovi | 712.09 mi (1,145.99 km) |
| Thornbury to Osimo | 930.78 mi (1,497.95 km) |
| Thornbury to Ospitaletto | 710.15 mi (1,142.88 km) |
| Thornbury to Ostuni | 1,213.91 mi (1,953.60 km) |
| Thornbury to Ottaviano | 1,096.46 mi (1,764.58 km) |
| Thornbury to Ovada | 703.83 mi (1,132.71 km) |
| Thornbury to Ozieri | 938.49 mi (1,510.35 km) |
| Thornbury to Paceco | 1,192.00 mi (1,918.35 km) |
