| Olen to Oignies | 93.71 mi (150.81 km) |
| Olen to Oissel | 207.77 mi (334.38 km) |
| Olen to Olivet | 262.74 mi (422.85 km) |
| Olen to Ollioules | 555.44 mi (893.90 km) |
| Olen to Olonne-sur-Mer | 438.20 mi (705.22 km) |
| Olen to Oloron-Sainte-Marie | 606.09 mi (975.41 km) |
| Olen to Onet Village | 480.27 mi (772.92 km) |
| Olen to Onnaing | 75.93 mi (122.20 km) |
| Olen to Orange | 484.47 mi (779.67 km) |
| Olen to Orchies | 84.21 mi (135.52 km) |
| Olen to Orleans | 260.23 mi (418.79 km) |
| Olen to Orly | 198.90 mi (320.11 km) |
| Olen to Ormesson-sur-Marne | 192.95 mi (310.52 km) |
| Olen to Orsay | 206.67 mi (332.61 km) |
| Olen to Orthez | 590.82 mi (950.83 km) |
