| Fredericia to Olympia Heights (Florida) | 4,772.40 mi (7,680.44 km) |
| Fredericia to Omaha (Nebraska) | 4,466.63 mi (7,188.34 km) |
| Fredericia to On Top of the World Designated Place (Florida) | 4,659.71 mi (7,499.07 km) |
| Fredericia to Onalaska (Wisconsin) | 4,171.49 mi (6,713.36 km) |
| Fredericia to Oneida (New York) | 3,688.98 mi (5,936.84 km) |
| Fredericia to Oneonta (New York) | 3,698.42 mi (5,952.04 km) |
| Fredericia to Ontario (California) | 5,512.48 mi (8,871.48 km) |
| Fredericia to Ontario (Oregon) | 4,886.69 mi (7,864.36 km) |
| Fredericia to Opa-locka (Florida) | 4,759.59 mi (7,659.82 km) |
| Fredericia to Opelika (Alabama) | 4,578.18 mi (7,367.88 km) |
| Fredericia to Opelousas (Louisiana) | 4,932.87 mi (7,938.68 km) |
| Fredericia to Orange (California) | 5,532.59 mi (8,903.85 km) |
| Fredericia to Orange (Texas) | 5,013.62 mi (8,068.64 km) |
| Fredericia to Orange City (Florida) | 4,632.06 mi (7,454.59 km) |
| Fredericia to Orangeburg (South Carolina) | 4,370.30 mi (7,033.32 km) |
