| Harlau to Nuth | 976.31 mi (1,571.22 km) |
| Harlau to Oegstgeest | 1,048.41 mi (1,687.26 km) |
| Harlau to Oirschot | 1,006.23 mi (1,619.37 km) |
| Harlau to Oisterwijk | 1,011.27 mi (1,627.48 km) |
| Harlau to Oldebroek | 992.34 mi (1,597.02 km) |
| Harlau to Oldenzaal | 947.81 mi (1,525.35 km) |
| Harlau to Ommen | 972.12 mi (1,564.48 km) |
| Harlau to Oosterend | 994.32 mi (1,600.21 km) |
| Harlau to Oosterhout | 1,026.42 mi (1,651.86 km) |
| Harlau to Oosterwolde | 985.04 mi (1,585.26 km) |
| Harlau to Oostzaan | 1,034.09 mi (1,664.21 km) |
| Harlau to Opmeer | 1,034.94 mi (1,665.58 km) |
| Harlau to Oss | 999.71 mi (1,608.88 km) |
| Harlau to Oud-Beijerland | 1,047.42 mi (1,685.66 km) |
| Harlau to Oudenbosch | 1,040.09 mi (1,673.87 km) |
