| Westminster to Nuth | 263.50 mi (424.07 km) |
| Westminster to Oegstgeest | 202.10 mi (325.25 km) |
| Westminster to Oirschot | 233.74 mi (376.17 km) |
| Westminster to Oisterwijk | 229.31 mi (369.05 km) |
| Westminster to Oldebroek | 265.14 mi (426.71 km) |
| Westminster to Oldenzaal | 306.49 mi (493.25 km) |
| Westminster to Ommen | 287.37 mi (462.48 km) |
| Westminster to Oosterend | 282.18 mi (454.12 km) |
| Westminster to Oosterhout | 214.60 mi (345.37 km) |
| Westminster to Oosterwolde | 290.74 mi (467.91 km) |
| Westminster to Oostzaan | 223.22 mi (359.25 km) |
| Westminster to Opmeer | 231.29 mi (372.23 km) |
| Westminster to Oss | 243.07 mi (391.18 km) |
| Westminster to Oud-Beijerland | 195.64 mi (314.85 km) |
| Westminster to Oudenbosch | 200.29 mi (322.33 km) |
