| Colwyn Bay to Nuth | 438.09 mi (705.04 km) |
| Colwyn Bay to Oegstgeest | 349.89 mi (563.10 km) |
| Colwyn Bay to Oirschot | 398.78 mi (641.77 km) |
| Colwyn Bay to Oisterwijk | 392.69 mi (631.97 km) |
| Colwyn Bay to Oldebroek | 404.25 mi (650.58 km) |
| Colwyn Bay to Oldenzaal | 448.79 mi (722.25 km) |
| Colwyn Bay to Ommen | 424.61 mi (683.35 km) |
| Colwyn Bay to Oosterend | 404.89 mi (651.60 km) |
| Colwyn Bay to Oosterhout | 377.46 mi (607.47 km) |
| Colwyn Bay to Oosterwolde | 414.29 mi (666.73 km) |
| Colwyn Bay to Oostzaan | 362.68 mi (583.67 km) |
| Colwyn Bay to Opmeer | 361.80 mi (582.26 km) |
| Colwyn Bay to Oss | 401.14 mi (645.57 km) |
| Colwyn Bay to Oud-Beijerland | 354.96 mi (571.25 km) |
| Colwyn Bay to Oudenbosch | 365.52 mi (588.25 km) |
