| Barbastro to Odessa (Texas) | 5,350.64 mi (8,611.03 km) |
| Barbastro to Ogden (Utah) | 5,294.80 mi (8,521.16 km) |
| Barbastro to Oildale (California) | 5,848.46 mi (9,412.19 km) |
| Barbastro to Ojus (Florida) | 4,564.47 mi (7,345.81 km) |
| Barbastro to Okemos (Michigan) | 4,117.76 mi (6,626.90 km) |
| Barbastro to Oklahoma City (Oklahoma) | 4,978.50 mi (8,012.12 km) |
| Barbastro to Okmulgee (Oklahoma) | 4,906.31 mi (7,895.94 km) |
| Barbastro to Olathe (Kansas) | 4,715.95 mi (7,589.58 km) |
| Barbastro to Old Jamestown (Missouri) | 4,520.88 mi (7,275.65 km) |
| Barbastro to Oldsmar (Florida) | 4,601.92 mi (7,406.08 km) |
| Barbastro to Olean (New York) | 3,874.40 mi (6,235.25 km) |
| Barbastro to Olive Branch (Mississippi) | 4,658.26 mi (7,496.74 km) |
| Barbastro to Olivehurst (California) | 5,745.01 mi (9,245.69 km) |
| Barbastro to Olney (Maryland) | 3,911.28 mi (6,294.59 km) |
| Barbastro to Olympia (Washington) | 5,363.74 mi (8,632.11 km) |
