| East Retford to Orbetello | 936.81 mi (1,507.66 km) |
| East Retford to Oria | 1,239.30 mi (1,994.47 km) |
| East Retford to Oristano | 1,029.47 mi (1,656.77 km) |
| East Retford to Orta Nova | 1,132.47 mi (1,822.53 km) |
| East Retford to Orte | 968.68 mi (1,558.94 km) |
| East Retford to Ortona | 1,035.50 mi (1,666.48 km) |
| East Retford to Orvieto | 946.04 mi (1,522.51 km) |
| East Retford to Orzinuovi | 732.70 mi (1,179.17 km) |
| East Retford to Osimo | 945.31 mi (1,521.33 km) |
| East Retford to Ospitaletto | 728.46 mi (1,172.34 km) |
| East Retford to Ostuni | 1,225.04 mi (1,971.51 km) |
| East Retford to Ottaviano | 1,121.59 mi (1,805.02 km) |
| East Retford to Ovada | 739.61 mi (1,190.28 km) |
| East Retford to Ozieri | 995.14 mi (1,601.52 km) |
| East Retford to Paceco | 1,239.52 mi (1,994.82 km) |
