| Delaware to Reidsville (North Carolina) | 329.18 mi (529.76 km) |
| Delaware to Reisterstown (Maryland) | 336.81 mi (542.04 km) |
| Delaware to Rendon (Texas) | 948.47 mi (1,526.42 km) |
| Delaware to Reno (Nevada) | 1,935.30 mi (3,114.57 km) |
| Delaware to Renton (Washington) | 1,987.77 mi (3,199.01 km) |
| Delaware to Republic (Missouri) | 599.23 mi (964.37 km) |
| Delaware to Reston (Virginia) | 318.45 mi (512.50 km) |
| Delaware to Revere (Massachusetts) | 642.54 mi (1,034.07 km) |
| Delaware to Rexburg (Idaho) | 1,485.73 mi (2,391.06 km) |
| Delaware to Reynoldsburg (Ohio) | 26.96 mi (43.39 km) |
| Delaware to Rialto (California) | 1,923.25 mi (3,095.17 km) |
| Delaware to Richardson (Texas) | 907.71 mi (1,460.82 km) |
| Delaware to Richfield (Minnesota) | 607.90 mi (978.32 km) |
| Delaware to Richfield (Wisconsin) | 335.34 mi (539.67 km) |
| Delaware to Richland (Washington) | 1,851.15 mi (2,979.14 km) |
