| Huercal-Overa to Nuth | 1,010.80 mi (1,626.73 km) |
| Huercal-Overa to Oegstgeest | 1,068.62 mi (1,719.78 km) |
| Huercal-Overa to Oirschot | 1,037.34 mi (1,669.43 km) |
| Huercal-Overa to Oisterwijk | 1,041.01 mi (1,675.34 km) |
| Huercal-Overa to Oldebroek | 1,107.74 mi (1,782.74 km) |
| Huercal-Overa to Oldenzaal | 1,117.50 mi (1,798.44 km) |
| Huercal-Overa to Ommen | 1,120.71 mi (1,803.61 km) |
| Huercal-Overa to Oosterend | 1,145.68 mi (1,843.79 km) |
| Huercal-Overa to Oosterhout | 1,039.39 mi (1,672.73 km) |
| Huercal-Overa to Oosterwolde | 1,148.51 mi (1,848.34 km) |
| Huercal-Overa to Oostzaan | 1,090.84 mi (1,755.54 km) |
| Huercal-Overa to Opmeer | 1,109.10 mi (1,784.93 km) |
| Huercal-Overa to Oss | 1,057.93 mi (1,702.57 km) |
| Huercal-Overa to Oud-Beijerland | 1,043.80 mi (1,679.84 km) |
| Huercal-Overa to Oudenbosch | 1,030.84 mi (1,658.98 km) |
