| Prospect Heights to Decatur (Alabama) | 522.79 mi (841.34 km) |
| Prospect Heights to Decatur (Georgia) | 608.62 mi (979.47 km) |
| Prospect Heights to Decatur (Illinois) | 163.98 mi (263.90 km) |
| Prospect Heights to Deer Park (New York) | 761.26 mi (1,225.13 km) |
| Prospect Heights to Deer Park (Texas) | 946.51 mi (1,523.25 km) |
| Prospect Heights to Deerfield (Illinois) | 5.73 mi (9.23 km) |
| Prospect Heights to Deerfield Beach (Florida) | 1,177.74 mi (1,895.40 km) |
| Prospect Heights to Defiance (Ohio) | 192.30 mi (309.47 km) |
| Prospect Heights to DeForest (Wisconsin) | 105.98 mi (170.56 km) |
| Prospect Heights to DeKalb (Illinois) | 43.82 mi (70.52 km) |
| Prospect Heights to Del Aire (California) | 1,740.22 mi (2,800.61 km) |
| Prospect Heights to Del City (Oklahoma) | 687.75 mi (1,106.82 km) |
| Prospect Heights to Del Rio (Texas) | 1,138.17 mi (1,831.70 km) |
| Prospect Heights to DeLand (Florida) | 977.03 mi (1,572.37 km) |
| Prospect Heights to Delano (California) | 1,729.55 mi (2,783.45 km) |
