| Saint-Cyr-sur-Mer to Octeville | 565.89 mi (910.71 km) |
| Saint-Cyr-sur-Mer to Oignies | 519.40 mi (835.89 km) |
| Saint-Cyr-sur-Mer to Oissel | 479.04 mi (770.94 km) |
| Saint-Cyr-sur-Mer to Olivet | 372.11 mi (598.86 km) |
| Saint-Cyr-sur-Mer to Ollioules | 7.61 mi (12.25 km) |
| Saint-Cyr-sur-Mer to Olonne-sur-Mer | 433.20 mi (697.17 km) |
| Saint-Cyr-sur-Mer to Oloron-Sainte-Marie | 318.06 mi (511.88 km) |
| Saint-Cyr-sur-Mer to Onet Village | 175.54 mi (282.51 km) |
| Saint-Cyr-sur-Mer to Onnaing | 507.62 mi (816.94 km) |
| Saint-Cyr-sur-Mer to Orange | 79.81 mi (128.44 km) |
| Saint-Cyr-sur-Mer to Orchies | 516.98 mi (832.00 km) |
| Saint-Cyr-sur-Mer to Orleans | 374.20 mi (602.22 km) |
| Saint-Cyr-sur-Mer to Orly | 415.77 mi (669.12 km) |
| Saint-Cyr-sur-Mer to Ormesson-sur-Marne | 415.83 mi (669.21 km) |
| Saint-Cyr-sur-Mer to Orsay | 416.77 mi (670.73 km) |
