| Concarneau to Oria | 1,177.81 mi (1,895.50 km) |
| Concarneau to Oristano | 829.55 mi (1,335.03 km) |
| Concarneau to Orta Nova | 1,062.32 mi (1,709.64 km) |
| Concarneau to Orte | 875.67 mi (1,409.26 km) |
| Concarneau to Ortona | 968.35 mi (1,558.40 km) |
| Concarneau to Orvieto | 854.53 mi (1,375.24 km) |
| Concarneau to Orzinuovi | 678.00 mi (1,091.14 km) |
| Concarneau to Osimo | 890.83 mi (1,433.66 km) |
| Concarneau to Ospitaletto | 680.90 mi (1,095.81 km) |
| Concarneau to Ostuni | 1,166.94 mi (1,878.00 km) |
| Concarneau to Ottaviano | 1,026.60 mi (1,652.15 km) |
| Concarneau to Ovada | 639.66 mi (1,029.43 km) |
| Concarneau to Ozieri | 812.44 mi (1,307.49 km) |
| Concarneau to Paceco | 1,073.71 mi (1,727.97 km) |
| Concarneau to Pachino | 1,234.84 mi (1,987.28 km) |
