| Plougastel-Daoulas to Oegstgeest | 470.23 mi (756.76 km) |
| Plougastel-Daoulas to Oirschot | 480.78 mi (773.74 km) |
| Plougastel-Daoulas to Oisterwijk | 479.12 mi (771.07 km) |
| Plougastel-Daoulas to Oldebroek | 532.06 mi (856.27 km) |
| Plougastel-Daoulas to Oldenzaal | 567.18 mi (912.78 km) |
| Plougastel-Daoulas to Ommen | 553.49 mi (890.75 km) |
| Plougastel-Daoulas to Oosterend | 556.91 mi (896.25 km) |
| Plougastel-Daoulas to Oosterhout | 467.45 mi (752.28 km) |
| Plougastel-Daoulas to Oosterwolde | 564.50 mi (908.47 km) |
| Plougastel-Daoulas to Oostzaan | 494.18 mi (795.31 km) |
| Plougastel-Daoulas to Opmeer | 506.25 mi (814.73 km) |
| Plougastel-Daoulas to Oss | 496.68 mi (799.32 km) |
| Plougastel-Daoulas to Oud-Beijerland | 455.35 mi (732.82 km) |
| Plougastel-Daoulas to Oudenbosch | 452.95 mi (728.96 km) |
| Plougastel-Daoulas to Oudewater | 479.40 mi (771.53 km) |
