| Horn Lake to Nuth | 4,626.94 mi (7,446.34 km) |
| Horn Lake to Oegstgeest | 4,533.04 mi (7,295.23 km) |
| Horn Lake to Oirschot | 4,586.00 mi (7,380.46 km) |
| Horn Lake to Oisterwijk | 4,579.56 mi (7,370.09 km) |
| Horn Lake to Oldebroek | 4,578.90 mi (7,369.02 km) |
| Horn Lake to Oldenzaal | 4,621.82 mi (7,438.09 km) |
| Horn Lake to Ommen | 4,596.12 mi (7,396.74 km) |
| Horn Lake to Oosterend | 4,567.73 mi (7,351.05 km) |
| Horn Lake to Oosterhout | 4,564.56 mi (7,345.95 km) |
| Horn Lake to Oosterwolde | 4,576.48 mi (7,365.13 km) |
| Horn Lake to Oostzaan | 4,541.17 mi (7,308.31 km) |
| Horn Lake to Opmeer | 4,535.50 mi (7,299.18 km) |
| Horn Lake to Oss | 4,585.90 mi (7,380.29 km) |
| Horn Lake to Oud-Beijerland | 4,541.71 mi (7,309.17 km) |
| Horn Lake to Oudenbosch | 4,553.45 mi (7,328.07 km) |
