| Huercal-Overa to Opwijk | 985.39 mi (1,585.84 km) |
| Huercal-Overa to Ostend | 985.50 mi (1,586.02 km) |
| Huercal-Overa to Oud-Heverlee | 984.31 mi (1,584.10 km) |
| Huercal-Overa to Oud-Turnhout | 1,020.43 mi (1,642.22 km) |
| Huercal-Overa to Oudenaarde | 969.40 mi (1,560.09 km) |
| Huercal-Overa to Oudenburg | 983.64 mi (1,583.02 km) |
| Huercal-Overa to Oupeye | 993.31 mi (1,598.58 km) |
| Huercal-Overa to Overijse | 978.96 mi (1,575.48 km) |
| Huercal-Overa to Overpelt | 1,021.31 mi (1,643.64 km) |
| Huercal-Overa to Paal | 1,005.87 mi (1,618.78 km) |
| Huercal-Overa to Peer | 1,016.64 mi (1,636.12 km) |
| Huercal-Overa to Pepinster | 987.73 mi (1,589.59 km) |
| Huercal-Overa to Peruwelz | 947.34 mi (1,524.59 km) |
| Huercal-Overa to Perwez | 973.38 mi (1,566.50 km) |
| Huercal-Overa to Philippeville | 941.84 mi (1,515.74 km) |
