| Karhula to Olympia Heights (Florida) | 5,233.81 mi (8,423.00 km) |
| Karhula to Omaha (Nebraska) | 4,706.66 mi (7,574.63 km) |
| Karhula to On Top of the World Designated Place (Florida) | 5,087.31 mi (8,187.24 km) |
| Karhula to Onalaska (Wisconsin) | 4,431.70 mi (7,132.13 km) |
| Karhula to Oneida (New York) | 4,071.53 mi (6,552.49 km) |
| Karhula to Oneonta (New York) | 4,090.16 mi (6,582.48 km) |
| Karhula to Ontario (California) | 5,602.09 mi (9,015.70 km) |
| Karhula to Ontario (Oregon) | 4,933.14 mi (7,939.11 km) |
| Karhula to Opa-locka (Florida) | 5,220.67 mi (8,401.85 km) |
| Karhula to Opelika (Alabama) | 4,960.37 mi (7,982.94 km) |
| Karhula to Opelousas (Louisiana) | 5,273.28 mi (8,486.52 km) |
| Karhula to Orange (California) | 5,621.23 mi (9,046.50 km) |
| Karhula to Orange (Texas) | 5,342.18 mi (8,597.41 km) |
| Karhula to Orange City (Florida) | 5,068.31 mi (8,156.65 km) |
| Karhula to Orangeburg (South Carolina) | 4,782.26 mi (7,696.30 km) |
