| Barbastro to Oerlinghausen | 794.20 mi (1,278.15 km) |
| Barbastro to Oestrich-Winkel | 666.64 mi (1,072.85 km) |
| Barbastro to Offenburg | 583.86 mi (939.63 km) |
| Barbastro to Oftersheim | 649.84 mi (1,045.81 km) |
| Barbastro to Ohrdruf | 788.40 mi (1,268.81 km) |
| Barbastro to Ohringen | 669.97 mi (1,078.22 km) |
| Barbastro to Olbernhau | 864.96 mi (1,392.01 km) |
| Barbastro to Olching | 690.95 mi (1,111.98 km) |
| Barbastro to Oldenburg | 853.74 mi (1,373.96 km) |
| Barbastro to Oldenburg in Holstein | 979.21 mi (1,575.89 km) |
| Barbastro to Olfen | 750.69 mi (1,208.12 km) |
| Barbastro to Olpe | 719.68 mi (1,158.22 km) |
| Barbastro to Olsberg | 754.53 mi (1,214.30 km) |
| Barbastro to Oranienburg | 958.42 mi (1,542.43 km) |
| Barbastro to Ortenberg | 715.01 mi (1,150.69 km) |
