| Washington Court House to Orangeburg (South Carolina) | 441.18 mi (710.01 km) |
| Washington Court House to Orangevale (California) | 2,011.89 mi (3,237.82 km) |
| Washington Court House to Orchards (Washington) | 2,012.19 mi (3,238.30 km) |
| Washington Court House to Orcutt (California) | 2,046.65 mi (3,293.76 km) |
| Washington Court House to Oregon (Ohio) | 146.08 mi (235.10 km) |
| Washington Court House to Oregon (Wisconsin) | 388.05 mi (624.51 km) |
| Washington Court House to Oregon City (Oregon) | 2,016.13 mi (3,244.64 km) |
| Washington Court House to Orem (Utah) | 1,492.70 mi (2,402.27 km) |
| Washington Court House to Orinda (California) | 2,076.24 mi (3,341.38 km) |
| Washington Court House to Orland Park (Illinois) | 273.06 mi (439.44 km) |
| Washington Court House to Orlando (Florida) | 773.49 mi (1,244.81 km) |
| Washington Court House to Ormond Beach (Florida) | 719.73 mi (1,158.29 km) |
| Washington Court House to Oro Valley (Arizona) | 1,609.50 mi (2,590.24 km) |
| Washington Court House to Oroville (California) | 2,017.03 mi (3,246.10 km) |
| Washington Court House to Oshkosh (Wisconsin) | 407.23 mi (655.37 km) |
