| Treia to Octeville | 832.61 mi (1,339.95 km) |
| Treia to Oignies | 693.04 mi (1,115.34 km) |
| Treia to Oissel | 715.28 mi (1,151.13 km) |
| Treia to Olivet | 634.25 mi (1,020.73 km) |
| Treia to Ollioules | 375.95 mi (605.04 km) |
| Treia to Olonne-sur-Mer | 769.53 mi (1,238.44 km) |
| Treia to Oloron-Sainte-Marie | 699.72 mi (1,126.10 km) |
| Treia to Onet Village | 538.77 mi (867.06 km) |
| Treia to Onnaing | 669.59 mi (1,077.60 km) |
| Treia to Orange | 428.22 mi (689.15 km) |
| Treia to Orchies | 685.10 mi (1,102.56 km) |
| Treia to Orleans | 635.05 mi (1,022.02 km) |
| Treia to Orly | 643.45 mi (1,035.53 km) |
| Treia to Ormesson-sur-Marne | 639.36 mi (1,028.94 km) |
| Treia to Orsay | 649.82 mi (1,045.78 km) |
