| Koekelberg to Olympia Heights (Florida) | 4,634.68 mi (7,458.79 km) |
| Koekelberg to Omaha (Nebraska) | 4,476.10 mi (7,203.58 km) |
| Koekelberg to On Top of the World Designated Place (Florida) | 4,546.78 mi (7,317.34 km) |
| Koekelberg to Onalaska (Wisconsin) | 4,173.76 mi (6,717.02 km) |
| Koekelberg to Oneida (New York) | 3,621.91 mi (5,828.90 km) |
| Koekelberg to Oneonta (New York) | 3,624.96 mi (5,833.80 km) |
| Koekelberg to Ontario (California) | 5,592.20 mi (8,999.77 km) |
| Koekelberg to Ontario (Oregon) | 4,998.63 mi (8,044.52 km) |
| Koekelberg to Opa-locka (Florida) | 4,622.25 mi (7,438.80 km) |
| Koekelberg to Opelika (Alabama) | 4,496.83 mi (7,236.94 km) |
| Koekelberg to Opelousas (Louisiana) | 4,873.46 mi (7,843.07 km) |
| Koekelberg to Orange (California) | 5,612.56 mi (9,032.55 km) |
| Koekelberg to Orange (Texas) | 4,960.56 mi (7,983.25 km) |
| Koekelberg to Orange City (Florida) | 4,513.59 mi (7,263.92 km) |
| Koekelberg to Orangeburg (South Carolina) | 4,272.06 mi (6,875.22 km) |
