| Fort Thomas to Oakley (California) | 2,000.08 mi (3,218.81 km) |
| Fort Thomas to Oakton (Virginia) | 384.15 mi (618.23 km) |
| Fort Thomas to Oakville (Missouri) | 319.08 mi (513.52 km) |
| Fort Thomas to Oatfield (Oregon) | 1,979.70 mi (3,186.01 km) |
| Fort Thomas to Ocala (Florida) | 696.63 mi (1,121.12 km) |
| Fort Thomas to Ocean Acres (New Jersey) | 544.60 mi (876.44 km) |
| Fort Thomas to Ocean City (New Jersey) | 527.49 mi (848.91 km) |
| Fort Thomas to Ocean Pines (Maryland) | 503.49 mi (810.29 km) |
| Fort Thomas to Ocean Pointe (Hawaii) | 4,442.95 mi (7,150.24 km) |
| Fort Thomas to Ocean Springs (Mississippi) | 647.51 mi (1,042.06 km) |
| Fort Thomas to Oceanside (California) | 1,866.41 mi (3,003.70 km) |
| Fort Thomas to Oceanside (New York) | 583.19 mi (938.56 km) |
| Fort Thomas to Ocoee (Florida) | 744.48 mi (1,198.12 km) |
| Fort Thomas to Oconomowoc (Wisconsin) | 348.41 mi (560.70 km) |
| Fort Thomas to Odenton (Maryland) | 416.01 mi (669.51 km) |
