| West Islip to Octeville | 3,409.87 mi (5,487.65 km) |
| West Islip to Oignies | 3,584.30 mi (5,768.37 km) |
| West Islip to Oissel | 3,532.18 mi (5,684.49 km) |
| West Islip to Olivet | 3,603.40 mi (5,799.12 km) |
| West Islip to Ollioules | 3,912.36 mi (6,296.33 km) |
| West Islip to Olonne-sur-Mer | 3,476.19 mi (5,594.39 km) |
| West Islip to Oloron-Sainte-Marie | 3,617.03 mi (5,821.05 km) |
| West Islip to Onet Village | 3,729.32 mi (6,001.76 km) |
| West Islip to Onnaing | 3,611.17 mi (5,811.62 km) |
| West Islip to Orange | 3,835.23 mi (6,172.20 km) |
| West Islip to Orchies | 3,594.48 mi (5,784.75 km) |
| West Islip to Orleans | 3,602.77 mi (5,798.10 km) |
| West Islip to Orly | 3,601.98 mi (5,796.82 km) |
| West Islip to Ormesson-sur-Marne | 3,607.08 mi (5,805.03 km) |
| West Islip to Orsay | 3,594.42 mi (5,784.66 km) |
