| Alcobendas to Opwijk | 812.37 mi (1,307.38 km) |
| Alcobendas to Ostend | 802.42 mi (1,291.37 km) |
| Alcobendas to Oud-Heverlee | 815.50 mi (1,312.42 km) |
| Alcobendas to Oud-Turnhout | 851.07 mi (1,369.66 km) |
| Alcobendas to Oudenaarde | 792.80 mi (1,275.88 km) |
| Alcobendas to Oudenburg | 801.29 mi (1,289.54 km) |
| Alcobendas to Oupeye | 832.34 mi (1,339.51 km) |
| Alcobendas to Overijse | 809.47 mi (1,302.71 km) |
| Alcobendas to Overpelt | 855.50 mi (1,376.80 km) |
| Alcobendas to Paal | 839.43 mi (1,350.93 km) |
| Alcobendas to Peer | 851.60 mi (1,370.51 km) |
| Alcobendas to Pepinster | 828.98 mi (1,334.11 km) |
| Alcobendas to Peruwelz | 772.32 mi (1,242.93 km) |
| Alcobendas to Perwez | 806.90 mi (1,298.58 km) |
| Alcobendas to Philippeville | 776.04 mi (1,248.91 km) |
