| Douglas to Octeville | 334.97 mi (539.08 km) |
| Douglas to Oignies | 504.02 mi (811.14 km) |
| Douglas to Oissel | 452.52 mi (728.27 km) |
| Douglas to Olivet | 536.61 mi (863.59 km) |
| Douglas to Ollioules | 896.42 mi (1,442.65 km) |
| Douglas to Olonne-sur-Mer | 475.63 mi (765.45 km) |
| Douglas to Oloron-Sainte-Marie | 701.39 mi (1,128.78 km) |
| Douglas to Onet Village | 725.19 mi (1,167.08 km) |
| Douglas to Onnaing | 531.15 mi (854.81 km) |
| Douglas to Orange | 810.64 mi (1,304.60 km) |
| Douglas to Orchies | 514.54 mi (828.07 km) |
| Douglas to Orleans | 535.41 mi (861.65 km) |
| Douglas to Orly | 523.87 mi (843.09 km) |
| Douglas to Ormesson-sur-Marne | 528.34 mi (850.29 km) |
| Douglas to Orsay | 517.20 mi (832.35 km) |
