| Roura to Olympia Heights (Florida) | 2,353.26 mi (3,787.20 km) |
| Roura to Omaha (Nebraska) | 3,691.80 mi (5,941.37 km) |
| Roura to On Top of the World Designated Place (Florida) | 2,583.34 mi (4,157.48 km) |
| Roura to Onalaska (Wisconsin) | 3,589.61 mi (5,776.91 km) |
| Roura to Oneida (New York) | 3,009.21 mi (4,842.85 km) |
| Roura to Oneonta (New York) | 2,956.69 mi (4,758.33 km) |
| Roura to Ontario (California) | 4,625.71 mi (7,444.36 km) |
| Roura to Ontario (Oregon) | 4,742.87 mi (7,632.92 km) |
| Roura to Opa-locka (Florida) | 2,355.61 mi (3,790.99 km) |
| Roura to Opelika (Alabama) | 2,874.39 mi (4,625.89 km) |
| Roura to Opelousas (Louisiana) | 3,138.26 mi (5,050.54 km) |
| Roura to Orange (California) | 4,634.98 mi (7,459.27 km) |
| Roura to Orange (Texas) | 3,216.52 mi (5,176.50 km) |
| Roura to Orange City (Florida) | 2,527.34 mi (4,067.36 km) |
| Roura to Orangeburg (South Carolina) | 2,704.06 mi (4,351.77 km) |
