| Alken to Oignies | 105.16 mi (169.23 km) |
| Alken to Oissel | 214.76 mi (345.63 km) |
| Alken to Olivet | 258.42 mi (415.89 km) |
| Alken to Ollioules | 535.15 mi (861.25 km) |
| Alken to Olonne-sur-Mer | 440.26 mi (708.53 km) |
| Alken to Oloron-Sainte-Marie | 598.94 mi (963.90 km) |
| Alken to Onet Village | 467.17 mi (751.83 km) |
| Alken to Onnaing | 82.17 mi (132.24 km) |
| Alken to Orange | 466.11 mi (750.14 km) |
| Alken to Orchies | 94.51 mi (152.10 km) |
| Alken to Orleans | 256.02 mi (412.03 km) |
| Alken to Orly | 196.43 mi (316.12 km) |
| Alken to Ormesson-sur-Marne | 189.96 mi (305.71 km) |
| Alken to Orsay | 204.95 mi (329.84 km) |
| Alken to Orthez | 584.39 mi (940.48 km) |
