| Mickleover to Olympia Heights (Florida) | 4,362.35 mi (7,020.52 km) |
| Mickleover to Omaha (Nebraska) | 4,189.15 mi (6,741.79 km) |
| Mickleover to On Top of the World Designated Place (Florida) | 4,268.74 mi (6,869.87 km) |
| Mickleover to Onalaska (Wisconsin) | 3,886.60 mi (6,254.87 km) |
| Mickleover to Oneida (New York) | 3,336.46 mi (5,369.52 km) |
| Mickleover to Oneonta (New York) | 3,340.15 mi (5,375.45 km) |
| Mickleover to Ontario (California) | 5,312.18 mi (8,549.12 km) |
| Mickleover to Ontario (Oregon) | 4,726.02 mi (7,605.79 km) |
| Mickleover to Opa-locka (Florida) | 4,349.81 mi (7,000.35 km) |
| Mickleover to Opelika (Alabama) | 4,213.55 mi (6,781.05 km) |
| Mickleover to Opelousas (Louisiana) | 4,587.97 mi (7,383.62 km) |
| Mickleover to Orange (California) | 5,332.57 mi (8,581.94 km) |
| Mickleover to Orange (Texas) | 4,674.57 mi (7,523.00 km) |
| Mickleover to Orange City (Florida) | 4,236.66 mi (6,818.24 km) |
| Mickleover to Orangeburg (South Carolina) | 3,991.12 mi (6,423.08 km) |
