| Middelfart to Olympia Heights (Florida) | 4,773.43 mi (7,682.10 km) |
| Middelfart to Omaha (Nebraska) | 4,469.27 mi (7,192.60 km) |
| Middelfart to On Top of the World Designated Place (Florida) | 4,661.03 mi (7,501.21 km) |
| Middelfart to Onalaska (Wisconsin) | 4,174.04 mi (6,717.47 km) |
| Middelfart to Oneida (New York) | 3,690.76 mi (5,939.71 km) |
| Middelfart to Oneonta (New York) | 3,700.14 mi (5,954.79 km) |
| Middelfart to Ontario (California) | 5,515.83 mi (8,876.87 km) |
| Middelfart to Ontario (Oregon) | 4,890.28 mi (7,870.15 km) |
| Middelfart to Opa-locka (Florida) | 4,760.62 mi (7,661.48 km) |
| Middelfart to Opelika (Alabama) | 4,579.87 mi (7,370.59 km) |
| Middelfart to Opelousas (Louisiana) | 4,934.82 mi (7,941.83 km) |
| Middelfart to Orange (California) | 5,535.94 mi (8,909.24 km) |
| Middelfart to Orange (Texas) | 5,015.65 mi (8,071.91 km) |
| Middelfart to Orange City (Florida) | 4,633.32 mi (7,456.61 km) |
| Middelfart to Orangeburg (South Carolina) | 4,371.78 mi (7,035.71 km) |
