| Seia to Octeville | 700.90 mi (1,127.99 km) |
| Seia to Oignies | 864.59 mi (1,391.42 km) |
| Seia to Oissel | 750.67 mi (1,208.09 km) |
| Seia to Olivet | 699.72 mi (1,126.09 km) |
| Seia to Ollioules | 721.99 mi (1,161.94 km) |
| Seia to Olonne-sur-Mer | 516.23 mi (830.79 km) |
| Seia to Oloron-Sainte-Marie | 412.39 mi (663.68 km) |
| Seia to Onet Village | 591.22 mi (951.48 km) |
| Seia to Onnaing | 878.09 mi (1,413.15 km) |
| Seia to Orange | 688.33 mi (1,107.76 km) |
| Seia to Orchies | 872.11 mi (1,403.53 km) |
| Seia to Orleans | 701.85 mi (1,129.52 km) |
| Seia to Orly | 758.55 mi (1,220.77 km) |
| Seia to Ormesson-sur-Marne | 765.27 mi (1,231.58 km) |
| Seia to Orsay | 749.75 mi (1,206.61 km) |
