| Delaware to River Ridge (Louisiana) | 819.10 mi (1,318.22 km) |
| Delaware to Riverbank (California) | 2,025.45 mi (3,259.65 km) |
| Delaware to Riverdale (Georgia) | 470.20 mi (756.71 km) |
| Delaware to Riverdale (Illinois) | 255.85 mi (411.75 km) |
| Delaware to Riverside (California) | 1,928.41 mi (3,103.48 km) |
| Delaware to Riverside (Ohio) | 65.37 mi (105.21 km) |
| Delaware to Riverton (Utah) | 1,513.28 mi (2,435.39 km) |
| Delaware to Riverton (Wyoming) | 1,316.66 mi (2,118.95 km) |
| Delaware to Riverview (Florida) | 862.19 mi (1,387.56 km) |
| Delaware to Riverview (Michigan) | 130.54 mi (210.09 km) |
| Delaware to Riviera Beach (Florida) | 948.72 mi (1,526.81 km) |
| Delaware to Riviera Beach (Maryland) | 356.45 mi (573.64 km) |
| Delaware to Roanoke (Virginia) | 267.02 mi (429.73 km) |
| Delaware to Roanoke Rapids (North Carolina) | 395.79 mi (636.96 km) |
| Delaware to Robbinsdale (Minnesota) | 614.96 mi (989.69 km) |
