| Severn to Nuth | 3,898.32 mi (6,273.75 km) |
| Severn to Oegstgeest | 3,809.36 mi (6,130.57 km) |
| Severn to Oirschot | 3,859.70 mi (6,211.59 km) |
| Severn to Oisterwijk | 3,853.57 mi (6,201.73 km) |
| Severn to Oldebroek | 3,859.08 mi (6,210.59 km) |
| Severn to Oldenzaal | 3,902.93 mi (6,281.16 km) |
| Severn to Ommen | 3,877.55 mi (6,240.32 km) |
| Severn to Oosterend | 3,851.52 mi (6,198.42 km) |
| Severn to Oosterhout | 3,838.37 mi (6,177.25 km) |
| Severn to Oosterwolde | 3,860.56 mi (6,212.97 km) |
| Severn to Oostzaan | 3,819.61 mi (6,147.07 km) |
| Severn to Opmeer | 3,815.64 mi (6,140.68 km) |
| Severn to Oss | 3,861.47 mi (6,214.43 km) |
| Severn to Oud-Beijerland | 3,815.79 mi (6,140.92 km) |
| Severn to Oudenbosch | 3,826.43 mi (6,158.04 km) |
