| Westbrook to Nuth | 3,444.87 mi (5,543.98 km) |
| Westbrook to Oegstgeest | 3,355.29 mi (5,399.82 km) |
| Westbrook to Oirschot | 3,405.94 mi (5,481.33 km) |
| Westbrook to Oisterwijk | 3,399.77 mi (5,471.40 km) |
| Westbrook to Oldebroek | 3,404.69 mi (5,479.31 km) |
| Westbrook to Oldenzaal | 3,448.48 mi (5,549.79 km) |
| Westbrook to Ommen | 3,423.07 mi (5,508.90 km) |
| Westbrook to Oosterend | 3,396.88 mi (5,466.75 km) |
| Westbrook to Oosterhout | 3,384.58 mi (5,446.95 km) |
| Westbrook to Oosterwolde | 3,405.91 mi (5,481.28 km) |
| Westbrook to Oostzaan | 3,365.35 mi (5,416.01 km) |
| Westbrook to Opmeer | 3,361.24 mi (5,409.39 km) |
| Westbrook to Oss | 3,407.49 mi (5,483.83 km) |
| Westbrook to Oud-Beijerland | 3,361.96 mi (5,410.56 km) |
| Westbrook to Oudenbosch | 3,372.73 mi (5,427.89 km) |
