| Barbastro to Oswego (Illinois) | 4,325.40 mi (6,961.05 km) |
| Barbastro to Oswego (New York) | 3,743.58 mi (6,024.71 km) |
| Barbastro to Otsego (Minnesota) | 4,408.12 mi (7,094.18 km) |
| Barbastro to Ottawa (Illinois) | 4,358.99 mi (7,015.11 km) |
| Barbastro to Ottawa (Kansas) | 4,746.84 mi (7,639.30 km) |
| Barbastro to Ottumwa (Iowa) | 4,526.08 mi (7,284.02 km) |
| Barbastro to Overland (Missouri) | 4,530.28 mi (7,290.78 km) |
| Barbastro to Overland Park (Kansas) | 4,710.09 mi (7,580.16 km) |
| Barbastro to Overlea (Maryland) | 3,878.08 mi (6,241.16 km) |
| Barbastro to Oviedo (Florida) | 4,504.43 mi (7,249.18 km) |
| Barbastro to Owasso (Oklahoma) | 4,869.60 mi (7,836.86 km) |
| Barbastro to Owatonna (Minnesota) | 4,438.28 mi (7,142.72 km) |
| Barbastro to Owensboro (Kentucky) | 4,422.52 mi (7,117.35 km) |
| Barbastro to Owings Mills (Maryland) | 3,889.19 mi (6,259.04 km) |
| Barbastro to Owosso (Michigan) | 4,097.16 mi (6,593.75 km) |
