| Niles to Octeville | 3,949.75 mi (6,356.52 km) |
| Niles to Oignies | 4,100.94 mi (6,599.83 km) |
| Niles to Oissel | 4,066.68 mi (6,544.69 km) |
| Niles to Olivet | 4,150.25 mi (6,679.19 km) |
| Niles to Ollioules | 4,488.47 mi (7,223.50 km) |
| Niles to Olonne-sur-Mer | 4,047.82 mi (6,514.33 km) |
| Niles to Oloron-Sainte-Marie | 4,215.31 mi (6,783.89 km) |
| Niles to Onet Village | 4,306.53 mi (6,930.69 km) |
| Niles to Onnaing | 4,126.72 mi (6,641.32 km) |
| Niles to Orange | 4,406.57 mi (7,091.69 km) |
| Niles to Orchies | 4,110.26 mi (6,614.82 km) |
| Niles to Orleans | 4,149.21 mi (6,677.51 km) |
| Niles to Orly | 4,138.42 mi (6,660.14 km) |
| Niles to Ormesson-sur-Marne | 4,142.62 mi (6,666.90 km) |
| Niles to Orsay | 4,132.00 mi (6,649.81 km) |
