| Kampen to Olympia Heights (Florida) | 4,673.79 mi (7,521.74 km) |
| Kampen to Omaha (Nebraska) | 4,464.10 mi (7,184.28 km) |
| Kampen to On Top of the World Designated Place (Florida) | 4,577.11 mi (7,366.14 km) |
| Kampen to Onalaska (Wisconsin) | 4,163.79 mi (6,700.98 km) |
| Kampen to Oneida (New York) | 3,634.92 mi (5,849.85 km) |
| Kampen to Oneonta (New York) | 3,640.20 mi (5,858.33 km) |
| Kampen to Ontario (California) | 5,557.76 mi (8,944.35 km) |
| Kampen to Ontario (Oregon) | 4,952.72 mi (7,970.63 km) |
| Kampen to Opa-locka (Florida) | 4,661.21 mi (7,501.50 km) |
| Kampen to Opelika (Alabama) | 4,516.10 mi (7,267.96 km) |
| Kampen to Opelousas (Louisiana) | 4,885.61 mi (7,862.63 km) |
| Kampen to Orange (California) | 5,578.06 mi (8,977.02 km) |
| Kampen to Orange (Texas) | 4,970.63 mi (7,999.45 km) |
| Kampen to Orange City (Florida) | 4,545.81 mi (7,315.78 km) |
| Kampen to Orangeburg (South Carolina) | 4,296.91 mi (6,915.21 km) |
