| Rock Island to Darby (Pennsylvania) | 808.65 mi (1,301.40 km) |
| Rock Island to Dardenne Prairie (Missouri) | 187.64 mi (301.98 km) |
| Rock Island to Darien (Illinois) | 135.68 mi (218.35 km) |
| Rock Island to Davenport (Iowa) | 6.10 mi (9.81 km) |
| Rock Island to Davidson (North Carolina) | 669.81 mi (1,077.95 km) |
| Rock Island to Davie (Florida) | 1,214.60 mi (1,954.72 km) |
| Rock Island to Davis (California) | 1,651.88 mi (2,658.45 km) |
| Rock Island to Dayton (Nevada) | 1,526.23 mi (2,456.23 km) |
| Rock Island to Dayton (Ohio) | 354.36 mi (570.29 km) |
| Rock Island to Daytona Beach (Florida) | 1,000.80 mi (1,610.63 km) |
| Rock Island to De Pere (Wisconsin) | 240.58 mi (387.17 km) |
| Rock Island to De Witt (New York) | 748.46 mi (1,204.52 km) |
| Rock Island to Dearborn (Michigan) | 383.37 mi (616.98 km) |
| Rock Island to Dearborn Heights (Michigan) | 380.16 mi (611.80 km) |
| Rock Island to DeBary (Florida) | 1,013.40 mi (1,630.91 km) |
