| Soure to Olympia Heights (Florida) | 4,164.97 mi (6,702.87 km) |
| Soure to Omaha (Nebraska) | 4,369.38 mi (7,031.84 km) |
| Soure to On Top of the World Designated Place (Florida) | 4,139.97 mi (6,662.64 km) |
| Soure to Onalaska (Wisconsin) | 4,065.69 mi (6,543.09 km) |
| Soure to Oneida (New York) | 3,377.06 mi (5,434.86 km) |
| Soure to Oneonta (New York) | 3,364.07 mi (5,413.95 km) |
| Soure to Ontario (California) | 5,606.52 mi (9,022.82 km) |
| Soure to Ontario (Oregon) | 5,119.73 mi (8,239.41 km) |
| Soure to Opa-locka (Florida) | 4,153.97 mi (6,685.18 km) |
| Soure to Opelika (Alabama) | 4,168.28 mi (6,708.19 km) |
| Soure to Opelousas (Louisiana) | 4,580.41 mi (7,371.45 km) |
| Soure to Orange (California) | 5,626.64 mi (9,055.21 km) |
| Soure to Orange (Texas) | 4,678.89 mi (7,529.94 km) |
| Soure to Orange City (Florida) | 4,094.96 mi (6,590.19 km) |
| Soure to Orangeburg (South Carolina) | 3,913.57 mi (6,298.29 km) |
