| Oak Ridge to Oakley (California) | 2,055.30 mi (3,307.68 km) |
| Oak Ridge to Oakton (Virginia) | 433.45 mi (697.56 km) |
| Oak Ridge to Oakville (Missouri) | 373.29 mi (600.75 km) |
| Oak Ridge to Oatfield (Oregon) | 2,087.64 mi (3,359.74 km) |
| Oak Ridge to Ocala (Florida) | 485.13 mi (780.75 km) |
| Oak Ridge to Ocean Acres (New Jersey) | 604.98 mi (973.63 km) |
| Oak Ridge to Ocean City (New Jersey) | 577.07 mi (928.71 km) |
| Oak Ridge to Ocean Pines (Maryland) | 530.25 mi (853.36 km) |
| Oak Ridge to Ocean Pointe (Hawaii) | 4,482.17 mi (7,213.36 km) |
| Oak Ridge to Ocean Springs (Mississippi) | 463.35 mi (745.69 km) |
| Oak Ridge to Oceanside (California) | 1,878.34 mi (3,022.89 km) |
| Oak Ridge to Oceanside (New York) | 661.15 mi (1,064.01 km) |
| Oak Ridge to Ocoee (Florida) | 535.01 mi (861.02 km) |
| Oak Ridge to Oconomowoc (Wisconsin) | 541.28 mi (871.11 km) |
| Oak Ridge to Odenton (Maryland) | 468.20 mi (753.50 km) |
