| East Retford to Olympia Heights (Florida) | 4,383.31 mi (7,054.25 km) |
| East Retford to Omaha (Nebraska) | 4,195.93 mi (6,752.70 km) |
| East Retford to On Top of the World Designated Place (Florida) | 4,287.39 mi (6,899.89 km) |
| East Retford to Onalaska (Wisconsin) | 3,893.91 mi (6,266.64 km) |
| East Retford to Oneida (New York) | 3,350.37 mi (5,391.89 km) |
| East Retford to Oneonta (New York) | 3,354.68 mi (5,398.84 km) |
| East Retford to Ontario (California) | 5,312.57 mi (8,549.76 km) |
| East Retford to Ontario (Oregon) | 4,722.71 mi (7,600.46 km) |
| East Retford to Opa-locka (Florida) | 4,370.73 mi (7,034.01 km) |
| East Retford to Opelika (Alabama) | 4,229.21 mi (6,806.26 km) |
| East Retford to Opelousas (Louisiana) | 4,601.68 mi (7,405.68 km) |
| East Retford to Orange (California) | 5,332.95 mi (8,582.55 km) |
| East Retford to Orange (Texas) | 4,687.71 mi (7,544.14 km) |
| East Retford to Orange City (Florida) | 4,255.82 mi (6,849.08 km) |
| East Retford to Orangeburg (South Carolina) | 4,008.31 mi (6,450.76 km) |
