| Korydallos to Octeville | 1,484.87 mi (2,389.66 km) |
| Korydallos to Oignies | 1,329.94 mi (2,140.33 km) |
| Korydallos to Oissel | 1,365.23 mi (2,197.13 km) |
| Korydallos to Olivet | 1,288.16 mi (2,073.09 km) |
| Korydallos to Ollioules | 997.67 mi (1,605.59 km) |
| Korydallos to Olonne-sur-Mer | 1,419.76 mi (2,284.89 km) |
| Korydallos to Oloron-Sainte-Marie | 1,317.41 mi (2,120.17 km) |
| Korydallos to Onet Village | 1,176.30 mi (1,893.08 km) |
| Korydallos to Onnaing | 1,304.55 mi (2,099.47 km) |
| Korydallos to Orange | 1,066.51 mi (1,716.39 km) |
| Korydallos to Orchies | 1,320.88 mi (2,125.74 km) |
| Korydallos to Orleans | 1,288.89 mi (2,074.27 km) |
| Korydallos to Orly | 1,293.98 mi (2,082.47 km) |
| Korydallos to Ormesson-sur-Marne | 1,289.42 mi (2,075.13 km) |
| Korydallos to Orsay | 1,300.90 mi (2,093.59 km) |
