| Bombarral to Olympia Heights (Florida) | 4,147.05 mi (6,674.03 km) |
| Bombarral to Omaha (Nebraska) | 4,375.31 mi (7,041.38 km) |
| Bombarral to On Top of the World Designated Place (Florida) | 4,126.52 mi (6,640.99 km) |
| Bombarral to Onalaska (Wisconsin) | 4,072.32 mi (6,553.76 km) |
| Bombarral to Oneida (New York) | 3,376.84 mi (5,434.50 km) |
| Bombarral to Oneonta (New York) | 3,362.82 mi (5,411.93 km) |
| Bombarral to Ontario (California) | 5,617.30 mi (9,040.17 km) |
| Bombarral to Ontario (Oregon) | 5,138.04 mi (8,268.88 km) |
| Bombarral to Opa-locka (Florida) | 4,136.18 mi (6,656.53 km) |
| Bombarral to Opelika (Alabama) | 4,160.14 mi (6,695.10 km) |
| Bombarral to Opelousas (Louisiana) | 4,573.69 mi (7,360.64 km) |
| Bombarral to Orange (California) | 5,637.37 mi (9,072.47 km) |
| Bombarral to Orange (Texas) | 4,672.71 mi (7,520.00 km) |
| Bombarral to Orange City (Florida) | 4,080.79 mi (6,567.39 km) |
| Bombarral to Orangeburg (South Carolina) | 3,904.03 mi (6,282.93 km) |
