| Barbastro to Opwijk | 646.25 mi (1,040.04 km) |
| Barbastro to Ostend | 648.50 mi (1,043.66 km) |
| Barbastro to Oud-Heverlee | 644.82 mi (1,037.73 km) |
| Barbastro to Oud-Turnhout | 680.93 mi (1,095.85 km) |
| Barbastro to Oudenaarde | 630.85 mi (1,015.25 km) |
| Barbastro to Oudenburg | 646.43 mi (1,040.32 km) |
| Barbastro to Oupeye | 653.91 mi (1,052.37 km) |
| Barbastro to Overijse | 639.50 mi (1,029.18 km) |
| Barbastro to Overpelt | 681.73 mi (1,097.14 km) |
| Barbastro to Paal | 666.29 mi (1,072.29 km) |
| Barbastro to Peer | 677.07 mi (1,089.64 km) |
| Barbastro to Pepinster | 648.51 mi (1,043.67 km) |
| Barbastro to Peruwelz | 608.59 mi (979.42 km) |
| Barbastro to Perwez | 633.81 mi (1,020.01 km) |
| Barbastro to Philippeville | 602.27 mi (969.26 km) |
