| Diamond Bar to Rancho Cordova (California) | 369.43 mi (594.54 km) |
| Diamond Bar to Rancho Cucamonga (California) | 16.70 mi (26.88 km) |
| Diamond Bar to Rancho Mirage (California) | 81.32 mi (130.87 km) |
| Diamond Bar to Rancho Palos Verdes (California) | 35.63 mi (57.34 km) |
| Diamond Bar to Rancho San Diego (California) | 99.88 mi (160.75 km) |
| Diamond Bar to Rancho Santa Margarita (California) | 28.28 mi (45.52 km) |
| Diamond Bar to Randallstown (Maryland) | 2,282.75 mi (3,673.74 km) |
| Diamond Bar to Rantoul (Illinois) | 1,681.82 mi (2,706.62 km) |
| Diamond Bar to Rapid City (South Dakota) | 1,044.94 mi (1,681.68 km) |
| Diamond Bar to Ravenna (Ohio) | 2,046.77 mi (3,293.95 km) |
| Diamond Bar to Raymondville (Texas) | 1,301.23 mi (2,094.12 km) |
| Diamond Bar to Raymore (Missouri) | 1,336.63 mi (2,151.10 km) |
| Diamond Bar to Raytown (Missouri) | 1,338.03 mi (2,153.35 km) |
| Diamond Bar to Reading (Ohio) | 1,875.29 mi (3,017.99 km) |
| Diamond Bar to Reading (Pennsylvania) | 2,325.35 mi (3,742.28 km) |
