| Llantwit Major to Nuth | 406.63 mi (654.40 km) |
| Llantwit Major to Oegstgeest | 343.41 mi (552.67 km) |
| Llantwit Major to Oirschot | 377.64 mi (607.76 km) |
| Llantwit Major to Oisterwijk | 373.15 mi (600.53 km) |
| Llantwit Major to Oldebroek | 405.59 mi (652.73 km) |
| Llantwit Major to Oldenzaal | 448.15 mi (721.23 km) |
| Llantwit Major to Ommen | 427.71 mi (688.33 km) |
| Llantwit Major to Oosterend | 418.46 mi (673.45 km) |
| Llantwit Major to Oosterhout | 358.35 mi (576.71 km) |
| Llantwit Major to Oosterwolde | 427.46 mi (687.93 km) |
| Llantwit Major to Oostzaan | 362.96 mi (584.13 km) |
| Llantwit Major to Opmeer | 368.71 mi (593.39 km) |
| Llantwit Major to Oss | 386.57 mi (622.12 km) |
| Llantwit Major to Oud-Beijerland | 338.91 mi (545.42 km) |
| Llantwit Major to Oudenbosch | 344.12 mi (553.81 km) |
