| East Grinstead to Orbetello | 799.44 mi (1,286.58 km) |
| East Grinstead to Oria | 1,117.55 mi (1,798.52 km) |
| East Grinstead to Oristano | 878.63 mi (1,414.02 km) |
| East Grinstead to Orta Nova | 1,007.27 mi (1,621.05 km) |
| East Grinstead to Orte | 835.76 mi (1,345.02 km) |
| East Grinstead to Ortona | 909.74 mi (1,464.09 km) |
| East Grinstead to Orvieto | 813.08 mi (1,308.53 km) |
| East Grinstead to Orzinuovi | 603.62 mi (971.43 km) |
| East Grinstead to Osimo | 821.28 mi (1,321.72 km) |
| East Grinstead to Ospitaletto | 601.04 mi (967.28 km) |
| East Grinstead to Ostuni | 1,104.02 mi (1,776.74 km) |
| East Grinstead to Ottaviano | 990.31 mi (1,593.75 km) |
| East Grinstead to Ovada | 600.56 mi (966.50 km) |
| East Grinstead to Ozieri | 846.24 mi (1,361.89 km) |
| East Grinstead to Paceco | 1,095.24 mi (1,762.61 km) |
