| Gagnef to Octeville | 1,000.03 mi (1,609.40 km) |
| Gagnef to Oignies | 841.76 mi (1,354.68 km) |
| Gagnef to Oissel | 951.27 mi (1,530.92 km) |
| Gagnef to Olivet | 1,024.23 mi (1,648.34 km) |
| Gagnef to Ollioules | 1,266.25 mi (2,037.83 km) |
| Gagnef to Olonne-sur-Mer | 1,185.21 mi (1,907.41 km) |
| Gagnef to Oloron-Sainte-Marie | 1,368.12 mi (2,201.77 km) |
| Gagnef to Onet Village | 1,233.85 mi (1,985.69 km) |
| Gagnef to Onnaing | 834.00 mi (1,342.19 km) |
| Gagnef to Orange | 1,213.81 mi (1,953.44 km) |
| Gagnef to Orchies | 836.10 mi (1,345.57 km) |
| Gagnef to Orleans | 1,021.66 mi (1,644.21 km) |
| Gagnef to Orly | 959.70 mi (1,544.49 km) |
| Gagnef to Ormesson-sur-Marne | 954.14 mi (1,535.55 km) |
| Gagnef to Orsay | 966.75 mi (1,555.83 km) |
