| Niort to Oignies | 327.12 mi (526.46 km) |
| Niort to Oissel | 220.46 mi (354.80 km) |
| Niort to Olivet | 153.70 mi (247.36 km) |
| Niort to Ollioules | 379.70 mi (611.07 km) |
| Niort to Olonne-sur-Mer | 64.15 mi (103.25 km) |
| Niort to Oloron-Sainte-Marie | 216.49 mi (348.41 km) |
| Niort to Onet Village | 200.82 mi (323.19 km) |
| Niort to Onnaing | 336.77 mi (541.98 km) |
| Niort to Orange | 297.58 mi (478.90 km) |
| Niort to Orchies | 333.15 mi (536.16 km) |
| Niort to Orleans | 155.81 mi (250.76 km) |
| Niort to Orly | 213.58 mi (343.72 km) |
| Niort to Ormesson-sur-Marne | 220.06 mi (354.16 km) |
| Niort to Orsay | 205.25 mi (330.32 km) |
| Niort to Orthez | 196.65 mi (316.48 km) |
