| Rock Island to Delaware (Ohio) | 400.58 mi (644.67 km) |
| Rock Island to Delhi (California) | 1,626.34 mi (2,617.34 km) |
| Rock Island to Delray Beach (Florida) | 1,196.90 mi (1,926.22 km) |
| Rock Island to Deltona (Florida) | 1,015.17 mi (1,633.76 km) |
| Rock Island to Deming (New Mexico) | 1,139.20 mi (1,833.37 km) |
| Rock Island to Denison (Texas) | 624.91 mi (1,005.69 km) |
| Rock Island to Dent (Ohio) | 349.31 mi (562.16 km) |
| Rock Island to Denton (Texas) | 673.98 mi (1,084.67 km) |
| Rock Island to Dentsville (South Carolina) | 732.26 mi (1,178.46 km) |
| Rock Island to Denver (Colorado) | 757.97 mi (1,219.84 km) |
| Rock Island to Depew (New York) | 615.65 mi (990.79 km) |
| Rock Island to Derby (Connecticut) | 905.48 mi (1,457.23 km) |
| Rock Island to Derby (Kansas) | 446.52 mi (718.60 km) |
| Rock Island to Des Moines (Iowa) | 156.78 mi (252.32 km) |
| Rock Island to Des Moines (Washington) | 1,606.01 mi (2,584.62 km) |
