| Seini to Octeville | 1,139.14 mi (1,833.27 km) |
| Seini to Oignies | 933.75 mi (1,502.72 km) |
| Seini to Oissel | 1,017.43 mi (1,637.40 km) |
| Seini to Olivet | 989.24 mi (1,592.02 km) |
| Seini to Ollioules | 900.90 mi (1,449.86 km) |
| Seini to Olonne-sur-Mer | 1,175.44 mi (1,891.69 km) |
| Seini to Oloron-Sainte-Marie | 1,194.28 mi (1,922.01 km) |
| Seini to Onet Village | 1,015.93 mi (1,634.98 km) |
| Seini to Onnaing | 906.82 mi (1,459.39 km) |
| Seini to Orange | 919.52 mi (1,479.83 km) |
| Seini to Orchies | 922.78 mi (1,485.07 km) |
| Seini to Orleans | 988.50 mi (1,590.84 km) |
| Seini to Orly | 960.73 mi (1,546.15 km) |
| Seini to Ormesson-sur-Marne | 953.93 mi (1,535.21 km) |
| Seini to Orsay | 970.28 mi (1,561.52 km) |
