| Fehmarnsund to Olympia Heights (Florida) | 4,847.90 mi (7,801.94 km) |
| Fehmarnsund to Omaha (Nebraska) | 4,558.44 mi (7,336.10 km) |
| Fehmarnsund to On Top of the World Designated Place (Florida) | 4,738.84 mi (7,626.43 km) |
| Fehmarnsund to Onalaska (Wisconsin) | 4,262.66 mi (6,860.09 km) |
| Fehmarnsund to Oneida (New York) | 3,773.30 mi (6,072.54 km) |
| Fehmarnsund to Oneonta (New York) | 3,782.00 mi (6,086.54 km) |
| Fehmarnsund to Ontario (California) | 5,607.80 mi (9,024.89 km) |
| Fehmarnsund to Ontario (Oregon) | 4,982.42 mi (8,018.44 km) |
| Fehmarnsund to Opa-locka (Florida) | 4,835.14 mi (7,781.40 km) |
| Fehmarnsund to Opelika (Alabama) | 4,661.42 mi (7,501.83 km) |
| Fehmarnsund to Opelousas (Louisiana) | 5,018.82 mi (8,077.01 km) |
| Fehmarnsund to Orange (California) | 5,627.92 mi (9,057.27 km) |
| Fehmarnsund to Orange (Texas) | 5,100.29 mi (8,208.12 km) |
| Fehmarnsund to Orange City (Florida) | 4,710.38 mi (7,580.63 km) |
| Fehmarnsund to Orangeburg (South Carolina) | 4,451.26 mi (7,163.60 km) |
