| Hampton to Orbetello | 824.88 mi (1,327.52 km) |
| Hampton to Oria | 1,142.02 mi (1,837.90 km) |
| Hampton to Oristano | 904.13 mi (1,455.05 km) |
| Hampton to Orta Nova | 1,031.99 mi (1,660.82 km) |
| Hampton to Orte | 860.96 mi (1,385.59 km) |
| Hampton to Ortona | 934.47 mi (1,503.88 km) |
| Hampton to Orvieto | 838.29 mi (1,349.09 km) |
| Hampton to Orzinuovi | 628.46 mi (1,011.41 km) |
| Hampton to Osimo | 845.83 mi (1,361.24 km) |
| Hampton to Ospitaletto | 625.75 mi (1,007.04 km) |
| Hampton to Ostuni | 1,128.42 mi (1,816.02 km) |
| Hampton to Ottaviano | 1,015.44 mi (1,634.20 km) |
| Hampton to Ovada | 626.03 mi (1,007.51 km) |
| Hampton to Ozieri | 871.85 mi (1,403.10 km) |
| Hampton to Paceco | 1,120.90 mi (1,803.91 km) |
