| Fort Thomas to Orangevale (California) | 1,964.06 mi (3,160.85 km) |
| Fort Thomas to Orchards (Washington) | 1,976.41 mi (3,180.73 km) |
| Fort Thomas to Orcutt (California) | 1,993.57 mi (3,208.35 km) |
| Fort Thomas to Oregon (Ohio) | 185.65 mi (298.78 km) |
| Fort Thomas to Oregon (Wisconsin) | 369.82 mi (595.17 km) |
| Fort Thomas to Oregon City (Oregon) | 1,979.70 mi (3,186.02 km) |
| Fort Thomas to Orem (Utah) | 1,445.45 mi (2,326.23 km) |
| Fort Thomas to Orinda (California) | 2,027.53 mi (3,263.00 km) |
| Fort Thomas to Orland Park (Illinois) | 250.44 mi (403.05 km) |
| Fort Thomas to Orlando (Florida) | 753.96 mi (1,213.39 km) |
| Fort Thomas to Ormond Beach (Florida) | 702.29 mi (1,130.23 km) |
| Fort Thomas to Oro Valley (Arizona) | 1,550.46 mi (2,495.22 km) |
| Fort Thomas to Oroville (California) | 1,970.50 mi (3,171.21 km) |
| Fort Thomas to Oshkosh (Wisconsin) | 402.10 mi (647.12 km) |
| Fort Thomas to Oskaloosa (Iowa) | 458.23 mi (737.45 km) |
