| Alken to Olympia Heights (Florida) | 4,675.85 mi (7,525.05 km) |
| Alken to Omaha (Nebraska) | 4,510.32 mi (7,258.66 km) |
| Alken to On Top of the World Designated Place (Florida) | 4,587.14 mi (7,382.29 km) |
| Alken to Onalaska (Wisconsin) | 4,208.33 mi (6,772.65 km) |
| Alken to Oneida (New York) | 3,660.12 mi (5,890.39 km) |
| Alken to Oneonta (New York) | 3,663.46 mi (5,895.78 km) |
| Alken to Ontario (California) | 5,621.82 mi (9,047.44 km) |
| Alken to Ontario (Oregon) | 5,025.36 mi (8,087.53 km) |
| Alken to Opa-locka (Florida) | 4,663.41 mi (7,505.03 km) |
| Alken to Opelika (Alabama) | 4,535.93 mi (7,299.88 km) |
| Alken to Opelousas (Louisiana) | 4,911.66 mi (7,904.55 km) |
| Alken to Orange (California) | 5,642.17 mi (9,080.19 km) |
| Alken to Orange (Texas) | 4,998.47 mi (8,044.27 km) |
| Alken to Orange City (Florida) | 4,554.14 mi (7,329.18 km) |
| Alken to Orangeburg (South Carolina) | 4,311.82 mi (6,939.20 km) |
