| Didymoteicho to Octeville | 1,467.30 mi (2,361.38 km) |
| Didymoteicho to Oignies | 1,285.86 mi (2,069.39 km) |
| Didymoteicho to Oissel | 1,343.34 mi (2,161.89 km) |
| Didymoteicho to Olivet | 1,284.31 mi (2,066.90 km) |
| Didymoteicho to Ollioules | 1,060.85 mi (1,707.28 km) |
| Didymoteicho to Olonne-sur-Mer | 1,442.97 mi (2,322.24 km) |
| Didymoteicho to Oloron-Sainte-Marie | 1,385.61 mi (2,229.93 km) |
| Didymoteicho to Onet Village | 1,224.09 mi (1,969.97 km) |
| Didymoteicho to Onnaing | 1,258.97 mi (2,026.12 km) |
| Didymoteicho to Orange | 1,113.95 mi (1,792.73 km) |
| Didymoteicho to Orchies | 1,275.66 mi (2,052.98 km) |
| Didymoteicho to Orleans | 1,284.46 mi (2,067.13 km) |
| Didymoteicho to Orly | 1,275.89 mi (2,053.35 km) |
| Didymoteicho to Ormesson-sur-Marne | 1,270.22 mi (2,044.22 km) |
| Didymoteicho to Orsay | 1,284.18 mi (2,066.68 km) |
