| Oostakker to Olympia Heights (Florida) | 4,607.06 mi (7,414.35 km) |
| Oostakker to Omaha (Nebraska) | 4,446.66 mi (7,156.21 km) |
| Oostakker to On Top of the World Designated Place (Florida) | 4,518.53 mi (7,271.87 km) |
| Oostakker to Onalaska (Wisconsin) | 4,144.32 mi (6,669.64 km) |
| Oostakker to Oneida (New York) | 3,592.79 mi (5,782.04 km) |
| Oostakker to Oneonta (New York) | 3,595.92 mi (5,787.07 km) |
| Oostakker to Ontario (California) | 5,563.31 mi (8,953.28 km) |
| Oostakker to Ontario (Oregon) | 4,970.39 mi (7,999.08 km) |
| Oostakker to Opa-locka (Florida) | 4,594.62 mi (7,394.33 km) |
| Oostakker to Opelika (Alabama) | 4,467.98 mi (7,190.52 km) |
| Oostakker to Opelousas (Louisiana) | 4,844.34 mi (7,796.22 km) |
| Oostakker to Orange (California) | 5,583.68 mi (8,986.06 km) |
| Oostakker to Orange (Texas) | 4,931.38 mi (7,936.30 km) |
| Oostakker to Orange City (Florida) | 4,485.46 mi (7,218.66 km) |
| Oostakker to Orangeburg (South Carolina) | 4,243.48 mi (6,829.23 km) |
