| Calan to Octeville | 1,172.08 mi (1,886.28 km) |
| Calan to Oignies | 976.06 mi (1,570.81 km) |
| Calan to Oissel | 1,048.16 mi (1,686.85 km) |
| Calan to Olivet | 1,005.89 mi (1,618.82 km) |
| Calan to Ollioules | 863.65 mi (1,389.91 km) |
| Calan to Olonne-sur-Mer | 1,182.89 mi (1,903.68 km) |
| Calan to Oloron-Sainte-Marie | 1,173.25 mi (1,888.16 km) |
| Calan to Onet Village | 998.27 mi (1,606.56 km) |
| Calan to Onnaing | 948.86 mi (1,527.05 km) |
| Calan to Orange | 894.95 mi (1,440.28 km) |
| Calan to Orchies | 965.36 mi (1,553.59 km) |
| Calan to Orleans | 1,005.53 mi (1,618.24 km) |
| Calan to Orly | 985.90 mi (1,586.65 km) |
| Calan to Ormesson-sur-Marne | 979.52 mi (1,576.39 km) |
| Calan to Orsay | 995.00 mi (1,601.30 km) |
