| Rockford to Dixon (California) | 1,734.08 mi (2,790.73 km) |
| Rockford to Dixon (Illinois) | 35.77 mi (57.56 km) |
| Rockford to Dobbs Ferry (New York) | 788.27 mi (1,268.59 km) |
| Rockford to Doctor Phillips (Florida) | 1,044.29 mi (1,680.62 km) |
| Rockford to Dodge City (Kansas) | 657.04 mi (1,057.40 km) |
| Rockford to Dolton (Illinois) | 87.05 mi (140.10 km) |
| Rockford to Donna (Texas) | 1,224.37 mi (1,970.44 km) |
| Rockford to Dorado (Puerto Rico) | 2,118.53 mi (3,409.45 km) |
| Rockford to Doral (Florida) | 1,239.07 mi (1,994.09 km) |
| Rockford to Doraville (Georgia) | 632.94 mi (1,018.62 km) |
| Rockford to Dothan (Alabama) | 788.05 mi (1,268.24 km) |
| Rockford to Douglas (Arizona) | 1,354.51 mi (2,179.88 km) |
| Rockford to Douglas (Georgia) | 817.80 mi (1,316.12 km) |
| Rockford to Douglasville (Georgia) | 634.55 mi (1,021.20 km) |
| Rockford to Dover (Delaware) | 740.00 mi (1,190.92 km) |
