| Sierning to Oignies | 536.47 mi (863.36 km) |
| Sierning to Oissel | 608.69 mi (979.59 km) |
| Sierning to Olivet | 573.74 mi (923.34 km) |
| Sierning to Ollioules | 530.77 mi (854.20 km) |
| Sierning to Olonne-sur-Mer | 759.47 mi (1,222.24 km) |
| Sierning to Oloron-Sainte-Marie | 793.20 mi (1,276.53 km) |
| Sierning to Onet Village | 614.39 mi (988.76 km) |
| Sierning to Onnaing | 509.29 mi (819.63 km) |
| Sierning to Orange | 528.67 mi (850.81 km) |
| Sierning to Orchies | 525.87 mi (846.31 km) |
| Sierning to Orleans | 573.09 mi (922.29 km) |
| Sierning to Orly | 548.30 mi (882.41 km) |
| Sierning to Ormesson-sur-Marne | 541.71 mi (871.81 km) |
| Sierning to Orsay | 557.64 mi (897.44 km) |
| Sierning to Orthez | 790.40 mi (1,272.03 km) |
