| Fort Thomas to Odessa (Texas) | 1,120.19 mi (1,802.77 km) |
| Fort Thomas to Ogden (Utah) | 1,454.56 mi (2,340.88 km) |
| Fort Thomas to Oildale (California) | 1,906.73 mi (3,068.58 km) |
| Fort Thomas to Ojus (Florida) | 940.27 mi (1,513.22 km) |
| Fort Thomas to Okemos (Michigan) | 250.51 mi (403.16 km) |
| Fort Thomas to Oklahoma City (Oklahoma) | 759.44 mi (1,222.20 km) |
| Fort Thomas to Okmulgee (Oklahoma) | 677.76 mi (1,090.75 km) |
| Fort Thomas to Olathe (Kansas) | 556.73 mi (895.98 km) |
| Fort Thomas to Old Jamestown (Missouri) | 313.77 mi (504.96 km) |
| Fort Thomas to Oldsmar (Florida) | 768.89 mi (1,237.41 km) |
| Fort Thomas to Olean (New York) | 377.74 mi (607.92 km) |
| Fort Thomas to Olive Branch (Mississippi) | 411.64 mi (662.48 km) |
| Fort Thomas to Olivehurst (California) | 1,975.97 mi (3,180.01 km) |
| Fort Thomas to Olney (Maryland) | 395.57 mi (636.61 km) |
| Fort Thomas to Olympia (Washington) | 1,995.01 mi (3,210.66 km) |
