| Ruislip to Octeville | 144.74 mi (232.94 km) |
| Ruislip to Oignies | 167.39 mi (269.38 km) |
| Ruislip to Oissel | 168.29 mi (270.83 km) |
| Ruislip to Olivet | 276.82 mi (445.50 km) |
| Ruislip to Ollioules | 652.25 mi (1,049.69 km) |
| Ruislip to Olonne-sur-Mer | 353.45 mi (568.82 km) |
| Ruislip to Oloron-Sainte-Marie | 579.18 mi (932.10 km) |
| Ruislip to Onet Village | 517.37 mi (832.63 km) |
| Ruislip to Onnaing | 193.58 mi (311.54 km) |
| Ruislip to Orange | 568.11 mi (914.29 km) |
| Ruislip to Orchies | 176.97 mi (284.80 km) |
| Ruislip to Orleans | 274.48 mi (441.73 km) |
| Ruislip to Orly | 232.20 mi (373.69 km) |
| Ruislip to Ormesson-sur-Marne | 233.30 mi (375.46 km) |
| Ruislip to Orsay | 230.20 mi (370.46 km) |
