| Rock Island to Decatur (Alabama) | 514.94 mi (828.72 km) |
| Rock Island to Decatur (Georgia) | 633.07 mi (1,018.82 km) |
| Rock Island to Decatur (Illinois) | 141.08 mi (227.04 km) |
| Rock Island to Deer Park (New York) | 898.33 mi (1,445.71 km) |
| Rock Island to Deer Park (Texas) | 852.50 mi (1,371.96 km) |
| Rock Island to Deerfield (Illinois) | 148.61 mi (239.16 km) |
| Rock Island to Deerfield Beach (Florida) | 1,205.07 mi (1,939.37 km) |
| Rock Island to Defiance (Ohio) | 322.53 mi (519.06 km) |
| Rock Island to DeForest (Wisconsin) | 137.10 mi (220.64 km) |
| Rock Island to DeKalb (Illinois) | 99.87 mi (160.72 km) |
| Rock Island to Del Aire (California) | 1,598.06 mi (2,571.83 km) |
| Rock Island to Del City (Oklahoma) | 557.09 mi (896.54 km) |
| Rock Island to Del Rio (Texas) | 1,015.65 mi (1,634.54 km) |
| Rock Island to DeLand (Florida) | 1,005.90 mi (1,618.85 km) |
| Rock Island to Delano (California) | 1,589.67 mi (2,558.33 km) |
