| Diamond Bar to Decatur (Alabama) | 1,753.32 mi (2,821.69 km) |
| Diamond Bar to Decatur (Georgia) | 1,913.98 mi (3,080.26 km) |
| Diamond Bar to Decatur (Illinois) | 1,637.93 mi (2,635.99 km) |
| Diamond Bar to Deer Park (New York) | 2,460.24 mi (3,959.38 km) |
| Diamond Bar to Deer Park (Texas) | 1,362.21 mi (2,192.26 km) |
| Diamond Bar to Deerfield (Illinois) | 1,714.02 mi (2,758.45 km) |
| Diamond Bar to Deerfield Beach (Florida) | 2,299.94 mi (3,701.40 km) |
| Diamond Bar to Defiance (Ohio) | 1,885.18 mi (3,033.91 km) |
| Diamond Bar to DeForest (Wisconsin) | 1,653.95 mi (2,661.78 km) |
| Diamond Bar to DeKalb (Illinois) | 1,666.00 mi (2,681.16 km) |
| Diamond Bar to Del Aire (California) | 32.21 mi (51.84 km) |
| Diamond Bar to Del City (Oklahoma) | 1,159.34 mi (1,865.78 km) |
| Diamond Bar to Del Rio (Texas) | 1,044.33 mi (1,680.69 km) |
| Diamond Bar to DeLand (Florida) | 2,167.46 mi (3,488.20 km) |
| Diamond Bar to Delano (California) | 147.09 mi (236.71 km) |
