| Niel to Oignies | 73.65 mi (118.53 km) |
| Niel to Oissel | 188.57 mi (303.47 km) |
| Niel to Olivet | 249.83 mi (402.06 km) |
| Niel to Ollioules | 555.72 mi (894.34 km) |
| Niel to Olonne-sur-Mer | 420.79 mi (677.20 km) |
| Niel to Oloron-Sainte-Marie | 594.23 mi (956.32 km) |
| Niel to Onet Village | 473.37 mi (761.82 km) |
| Niel to Onnaing | 59.74 mi (96.15 km) |
| Niel to Orange | 482.67 mi (776.78 km) |
| Niel to Orchies | 65.04 mi (104.67 km) |
| Niel to Orleans | 247.25 mi (397.91 km) |
| Niel to Orly | 185.26 mi (298.14 km) |
| Niel to Ormesson-sur-Marne | 179.72 mi (289.24 km) |
| Niel to Orsay | 192.44 mi (309.71 km) |
| Niel to Orthez | 578.45 mi (930.93 km) |
