| Westbrook to Octeville | 3,169.00 mi (5,100.01 km) |
| Westbrook to Oignies | 3,340.03 mi (5,375.25 km) |
| Westbrook to Oissel | 3,290.63 mi (5,295.75 km) |
| Westbrook to Olivet | 3,364.18 mi (5,414.12 km) |
| Westbrook to Ollioules | 3,679.79 mi (5,922.06 km) |
| Westbrook to Olonne-sur-Mer | 3,241.77 mi (5,217.12 km) |
| Westbrook to Oloron-Sainte-Marie | 3,389.46 mi (5,454.81 km) |
| Westbrook to Onet Village | 3,496.67 mi (5,627.35 km) |
| Westbrook to Onnaing | 3,366.79 mi (5,418.32 km) |
| Westbrook to Orange | 3,601.44 mi (5,795.96 km) |
| Westbrook to Orchies | 3,350.10 mi (5,391.46 km) |
| Westbrook to Orleans | 3,363.47 mi (5,412.98 km) |
| Westbrook to Orly | 3,360.89 mi (5,408.83 km) |
| Westbrook to Ormesson-sur-Marne | 3,365.85 mi (5,416.81 km) |
| Westbrook to Orsay | 3,353.52 mi (5,396.96 km) |
