| Dinan to Oria | 1,110.56 mi (1,787.28 km) |
| Dinan to Oristano | 790.35 mi (1,271.94 km) |
| Dinan to Orta Nova | 995.63 mi (1,602.30 km) |
| Dinan to Orte | 811.14 mi (1,305.41 km) |
| Dinan to Ortona | 900.07 mi (1,448.53 km) |
| Dinan to Orvieto | 789.39 mi (1,270.40 km) |
| Dinan to Orzinuovi | 602.78 mi (970.08 km) |
| Dinan to Osimo | 819.30 mi (1,318.54 km) |
| Dinan to Ospitaletto | 604.56 mi (972.94 km) |
| Dinan to Ostuni | 1,098.99 mi (1,768.65 km) |
| Dinan to Ottaviano | 964.37 mi (1,552.00 km) |
| Dinan to Ovada | 571.92 mi (920.41 km) |
| Dinan to Ozieri | 768.10 mi (1,236.14 km) |
| Dinan to Paceco | 1,028.15 mi (1,654.65 km) |
| Dinan to Pachino | 1,186.16 mi (1,908.94 km) |
