| Rockford to Des Plaines (Illinois) | 61.58 mi (99.11 km) |
| Rockford to Desert Hot Springs (California) | 1,591.68 mi (2,561.56 km) |
| Rockford to DeSoto (Texas) | 792.04 mi (1,274.67 km) |
| Rockford to Destin (Florida) | 832.26 mi (1,339.40 km) |
| Rockford to Destrehan (Louisiana) | 852.72 mi (1,372.32 km) |
| Rockford to Detroit (Michigan) | 304.61 mi (490.23 km) |
| Rockford to Diamond Bar (California) | 1,654.04 mi (2,661.92 km) |
| Rockford to Diamond Springs (California) | 1,678.20 mi (2,700.81 km) |
| Rockford to Dickinson (North Dakota) | 746.27 mi (1,201.00 km) |
| Rockford to Dickinson (Texas) | 945.62 mi (1,521.83 km) |
| Rockford to Dickson (Tennessee) | 437.62 mi (704.28 km) |
| Rockford to Difficult Run (Virginia) | 656.48 mi (1,056.51 km) |
| Rockford to Dinuba (California) | 1,657.46 mi (2,667.43 km) |
| Rockford to Discovery Bay (California) | 1,735.16 mi (2,792.46 km) |
| Rockford to Dix Hills (New York) | 818.43 mi (1,317.13 km) |
