| Siano to Octeville | 998.42 mi (1,606.81 km) |
| Siano to Oignies | 872.89 mi (1,404.77 km) |
| Siano to Oissel | 885.65 mi (1,425.31 km) |
| Siano to Olivet | 796.91 mi (1,282.50 km) |
| Siano to Ollioules | 482.03 mi (775.75 km) |
| Siano to Olonne-sur-Mer | 911.00 mi (1,466.11 km) |
| Siano to Oloron-Sainte-Marie | 801.65 mi (1,290.13 km) |
| Siano to Onet Village | 662.19 mi (1,065.68 km) |
| Siano to Onnaing | 850.40 mi (1,368.58 km) |
| Siano to Orange | 553.51 mi (890.78 km) |
| Siano to Orchies | 865.47 mi (1,392.84 km) |
| Siano to Orleans | 798.04 mi (1,284.32 km) |
| Siano to Orly | 813.72 mi (1,309.56 km) |
| Siano to Ormesson-sur-Marne | 810.29 mi (1,304.04 km) |
| Siano to Orsay | 819.23 mi (1,318.42 km) |
