| River Falls to Nuth | 4,229.98 mi (6,807.49 km) |
| River Falls to Oegstgeest | 4,129.18 mi (6,645.28 km) |
| River Falls to Oirschot | 4,185.68 mi (6,736.20 km) |
| River Falls to Oisterwijk | 4,178.81 mi (6,725.15 km) |
| River Falls to Oldebroek | 4,167.46 mi (6,706.88 km) |
| River Falls to Oldenzaal | 4,207.95 mi (6,772.05 km) |
| River Falls to Ommen | 4,182.24 mi (6,730.66 km) |
| River Falls to Oosterend | 4,150.53 mi (6,679.63 km) |
| River Falls to Oosterhout | 4,164.48 mi (6,702.08 km) |
| River Falls to Oosterwolde | 4,158.63 mi (6,692.67 km) |
| River Falls to Oostzaan | 4,133.46 mi (6,652.15 km) |
| River Falls to Opmeer | 4,125.01 mi (6,638.57 km) |
| River Falls to Oss | 4,182.26 mi (6,730.70 km) |
| River Falls to Oud-Beijerland | 4,141.61 mi (6,665.27 km) |
| River Falls to Oudenbosch | 4,155.09 mi (6,686.97 km) |
