| Koflach to Olympia Heights (Florida) | 5,178.32 mi (8,333.70 km) |
| Koflach to Omaha (Nebraska) | 5,019.84 mi (8,078.65 km) |
| Koflach to On Top of the World Designated Place (Florida) | 5,096.10 mi (8,201.38 km) |
| Koflach to Onalaska (Wisconsin) | 4,718.91 mi (7,594.35 km) |
| Koflach to Oneida (New York) | 4,175.26 mi (6,719.44 km) |
| Koflach to Oneonta (New York) | 4,178.33 mi (6,724.38 km) |
| Koflach to Ontario (California) | 6,111.31 mi (9,835.21 km) |
| Koflach to Ontario (Oregon) | 5,499.25 mi (8,850.18 km) |
| Koflach to Opa-locka (Florida) | 5,166.02 mi (8,313.91 km) |
| Koflach to Opelika (Alabama) | 5,049.78 mi (8,126.83 km) |
| Koflach to Opelousas (Louisiana) | 5,426.81 mi (8,733.61 km) |
| Koflach to Orange (California) | 6,131.58 mi (9,867.83 km) |
| Koflach to Orange (Texas) | 5,513.77 mi (8,873.55 km) |
| Koflach to Orange City (Florida) | 5,061.93 mi (8,146.38 km) |
| Koflach to Orangeburg (South Carolina) | 4,823.73 mi (7,763.04 km) |
