| Elk River to Nuth | 4,239.71 mi (6,823.16 km) |
| Elk River to Oegstgeest | 4,138.38 mi (6,660.07 km) |
| Elk River to Oirschot | 4,195.15 mi (6,751.43 km) |
| Elk River to Oisterwijk | 4,188.24 mi (6,740.33 km) |
| Elk River to Oldebroek | 4,175.83 mi (6,720.35 km) |
| Elk River to Oldenzaal | 4,216.02 mi (6,785.03 km) |
| Elk River to Ommen | 4,190.34 mi (6,743.70 km) |
| Elk River to Oosterend | 4,158.34 mi (6,692.20 km) |
| Elk River to Oosterhout | 4,174.00 mi (6,717.41 km) |
| Elk River to Oosterwolde | 4,166.36 mi (6,705.10 km) |
| Elk River to Oostzaan | 4,142.25 mi (6,666.31 km) |
| Elk River to Opmeer | 4,133.54 mi (6,652.29 km) |
| Elk River to Oss | 4,191.40 mi (6,745.41 km) |
| Elk River to Oud-Beijerland | 4,151.16 mi (6,680.64 km) |
| Elk River to Oudenbosch | 4,164.80 mi (6,702.59 km) |
