| Leavenworth to Olympia Heights (Florida) | 1,263.43 mi (2,033.29 km) |
| Leavenworth to Omaha (Nebraska) | 146.57 mi (235.88 km) |
| Leavenworth to On Top of the World Designated Place (Florida) | 1,007.88 mi (1,622.02 km) |
| Leavenworth to Onalaska (Wisconsin) | 369.12 mi (594.05 km) |
| Leavenworth to Oneida (New York) | 1,031.82 mi (1,660.55 km) |
| Leavenworth to Oneonta (New York) | 1,056.93 mi (1,700.96 km) |
| Leavenworth to Ontario (California) | 1,304.82 mi (2,099.91 km) |
| Leavenworth to Ontario (Oregon) | 1,179.47 mi (1,898.17 km) |
| Leavenworth to Opa-locka (Florida) | 1,257.19 mi (2,023.26 km) |
| Leavenworth to Opelika (Alabama) | 704.07 mi (1,133.09 km) |
| Leavenworth to Opelousas (Louisiana) | 628.79 mi (1,011.95 km) |
| Leavenworth to Orange (California) | 1,322.57 mi (2,128.47 km) |
| Leavenworth to Orange (Texas) | 639.15 mi (1,028.62 km) |
| Leavenworth to Orange City (Florida) | 1,057.64 mi (1,702.11 km) |
| Leavenworth to Orangeburg (South Carolina) | 877.97 mi (1,412.96 km) |
