| Collado-Villalba to Opwijk | 814.58 mi (1,310.95 km) |
| Collado-Villalba to Ostend | 803.17 mi (1,292.57 km) |
| Collado-Villalba to Oud-Heverlee | 818.30 mi (1,316.92 km) |
| Collado-Villalba to Oud-Turnhout | 853.70 mi (1,373.90 km) |
| Collado-Villalba to Oudenaarde | 794.55 mi (1,278.70 km) |
| Collado-Villalba to Oudenburg | 802.15 mi (1,290.94 km) |
| Collado-Villalba to Oupeye | 836.14 mi (1,345.63 km) |
| Collado-Villalba to Overijse | 812.19 mi (1,307.09 km) |
| Collado-Villalba to Overpelt | 858.61 mi (1,381.80 km) |
| Collado-Villalba to Paal | 842.49 mi (1,355.86 km) |
| Collado-Villalba to Peer | 854.81 mi (1,375.69 km) |
| Collado-Villalba to Pepinster | 833.08 mi (1,340.71 km) |
| Collado-Villalba to Peruwelz | 774.37 mi (1,246.22 km) |
| Collado-Villalba to Perwez | 810.04 mi (1,303.64 km) |
| Collado-Villalba to Philippeville | 779.36 mi (1,254.26 km) |
