| Oak Ridge to Ridgeland (Mississippi) | 414.32 mi (666.78 km) |
| Oak Ridge to Ridgewood (New Jersey) | 650.11 mi (1,046.26 km) |
| Oak Ridge to Rifle (Colorado) | 1,302.32 mi (2,095.88 km) |
| Oak Ridge to Rincon (Georgia) | 307.97 mi (495.62 km) |
| Oak Ridge to Ringwood (New Jersey) | 646.99 mi (1,041.23 km) |
| Oak Ridge to Río Grande (Puerto Rico) | 1,656.07 mi (2,665.19 km) |
| Oak Ridge to Rio Grande City (Texas) | 1,082.28 mi (1,741.77 km) |
| Oak Ridge to Rio Linda (California) | 2,035.73 mi (3,276.19 km) |
| Oak Ridge to Rio Rancho (New Mexico) | 1,256.38 mi (2,021.94 km) |
| Oak Ridge to Rio Rico (Arizona) | 1,559.55 mi (2,509.86 km) |
| Oak Ridge to Ripon (California) | 2,027.19 mi (3,262.44 km) |
| Oak Ridge to River Edge (New Jersey) | 651.67 mi (1,048.76 km) |
| Oak Ridge to River Falls (Wisconsin) | 754.05 mi (1,213.53 km) |
| Oak Ridge to River Forest (Illinois) | 451.38 mi (726.43 km) |
| Oak Ridge to River Grove (Illinois) | 453.62 mi (730.03 km) |
