| Oak Ridge to Orangevale (California) | 2,023.89 mi (3,257.14 km) |
| Oak Ridge to Orchards (Washington) | 2,086.20 mi (3,357.41 km) |
| Oak Ridge to Orcutt (California) | 2,024.06 mi (3,257.41 km) |
| Oak Ridge to Oregon (Ohio) | 395.76 mi (636.91 km) |
| Oak Ridge to Oregon (Wisconsin) | 552.24 mi (888.74 km) |
| Oak Ridge to Oregon City (Oregon) | 2,087.18 mi (3,358.99 km) |
| Oak Ridge to Orem (Utah) | 1,512.90 mi (2,434.77 km) |
| Oak Ridge to Orinda (California) | 2,082.48 mi (3,351.43 km) |
| Oak Ridge to Orland Park (Illinois) | 434.61 mi (699.44 km) |
| Oak Ridge to Orlando (Florida) | 545.30 mi (877.57 km) |
| Oak Ridge to Ormond Beach (Florida) | 496.50 mi (799.03 km) |
| Oak Ridge to Oro Valley (Arizona) | 1,539.54 mi (2,477.66 km) |
| Oak Ridge to Oroville (California) | 2,036.60 mi (3,277.59 km) |
| Oak Ridge to Oshkosh (Wisconsin) | 600.67 mi (966.69 km) |
| Oak Ridge to Oskaloosa (Iowa) | 581.32 mi (935.55 km) |
