| Diamond Bar to Robertsville (New Jersey) | 2,411.20 mi (3,880.45 km) |
| Diamond Bar to Robinson (Texas) | 1,213.69 mi (1,953.24 km) |
| Diamond Bar to Robstown (Texas) | 1,266.41 mi (2,038.09 km) |
| Diamond Bar to Rochester (Michigan) | 1,957.97 mi (3,151.04 km) |
| Diamond Bar to Rochester (Minnesota) | 1,517.74 mi (2,442.57 km) |
| Diamond Bar to Rochester (New Hampshire) | 2,572.20 mi (4,139.55 km) |
| Diamond Bar to Rochester (New York) | 2,238.09 mi (3,601.86 km) |
| Diamond Bar to Rochester Hills (Michigan) | 1,955.96 mi (3,147.81 km) |
| Diamond Bar to Rock Hill (South Carolina) | 2,084.85 mi (3,355.25 km) |
| Diamond Bar to Rock Island (Illinois) | 1,567.26 mi (2,522.27 km) |
| Diamond Bar to Rock Springs (Wyoming) | 703.25 mi (1,131.78 km) |
| Diamond Bar to Rockford (Illinois) | 1,654.04 mi (2,661.92 km) |
| Diamond Bar to Rockledge (Florida) | 2,214.94 mi (3,564.60 km) |
| Diamond Bar to Rocklin (California) | 383.08 mi (616.51 km) |
| Diamond Bar to Rockport (Texas) | 1,292.97 mi (2,080.84 km) |
