| Diamond Bar to Ridgeland (Mississippi) | 1,598.27 mi (2,572.17 km) |
| Diamond Bar to Ridgewood (New Jersey) | 2,418.12 mi (3,891.58 km) |
| Diamond Bar to Rifle (Colorado) | 674.11 mi (1,084.88 km) |
| Diamond Bar to Rincon (Georgia) | 2,108.26 mi (3,392.92 km) |
| Diamond Bar to Ringwood (New Jersey) | 2,409.26 mi (3,877.33 km) |
| Diamond Bar to Río Grande (Puerto Rico) | 3,359.94 mi (5,407.30 km) |
| Diamond Bar to Rio Grande City (Texas) | 1,247.83 mi (2,008.19 km) |
| Diamond Bar to Rio Linda (California) | 381.55 mi (614.04 km) |
| Diamond Bar to Rio Rancho (New Mexico) | 637.87 mi (1,026.55 km) |
| Diamond Bar to Rio Rico (Arizona) | 432.70 mi (696.37 km) |
| Diamond Bar to Ripon (California) | 318.24 mi (512.16 km) |
| Diamond Bar to River Edge (New Jersey) | 2,422.17 mi (3,898.11 km) |
| Diamond Bar to River Falls (Wisconsin) | 1,530.47 mi (2,463.06 km) |
| Diamond Bar to River Forest (Illinois) | 1,712.74 mi (2,756.39 km) |
| Diamond Bar to River Grove (Illinois) | 1,712.11 mi (2,755.37 km) |
