| Rock Island to Duluth (Minnesota) | 374.61 mi (602.87 km) |
| Rock Island to Dumas (Texas) | 725.13 mi (1,166.99 km) |
| Rock Island to Dumont (New Jersey) | 861.82 mi (1,386.97 km) |
| Rock Island to Duncan (Oklahoma) | 623.06 mi (1,002.72 km) |
| Rock Island to Duncanville (Texas) | 702.01 mi (1,129.78 km) |
| Rock Island to Dundalk (Maryland) | 756.12 mi (1,216.86 km) |
| Rock Island to Dunedin (Florida) | 1,027.39 mi (1,653.43 km) |
| Rock Island to Dunkirk (New York) | 581.65 mi (936.08 km) |
| Rock Island to Dunmore (Pennsylvania) | 774.68 mi (1,246.72 km) |
| Rock Island to Dunwoody (Georgia) | 622.51 mi (1,001.84 km) |
| Rock Island to Durango (Colorado) | 966.48 mi (1,555.39 km) |
| Rock Island to Durant (Oklahoma) | 605.88 mi (975.07 km) |
| Rock Island to Durham (North Carolina) | 734.11 mi (1,181.44 km) |
| Rock Island to Dyer (Indiana) | 159.10 mi (256.05 km) |
| Rock Island to Dyersburg (Tennessee) | 380.29 mi (612.02 km) |
