| Ostrov to Oignies | 437.95 mi (704.82 km) |
| Ostrov to Oissel | 531.72 mi (855.72 km) |
| Ostrov to Olivet | 526.65 mi (847.56 km) |
| Ostrov to Ollioules | 597.76 mi (962.00 km) |
| Ostrov to Olonne-sur-Mer | 721.63 mi (1,161.35 km) |
| Ostrov to Oloron-Sainte-Marie | 805.83 mi (1,296.86 km) |
| Ostrov to Onet Village | 633.90 mi (1,020.17 km) |
| Ostrov to Onnaing | 411.63 mi (662.45 km) |
| Ostrov to Orange | 571.28 mi (919.39 km) |
| Ostrov to Orchies | 426.93 mi (687.07 km) |
| Ostrov to Orleans | 525.26 mi (845.33 km) |
| Ostrov to Orly | 484.71 mi (780.06 km) |
| Ostrov to Ormesson-sur-Marne | 477.53 mi (768.51 km) |
| Ostrov to Orsay | 494.58 mi (795.96 km) |
| Ostrov to Orthez | 798.51 mi (1,285.08 km) |
