| Romeoville to Decatur (Alabama) | 491.41 mi (790.85 km) |
| Romeoville to Decatur (Georgia) | 581.39 mi (935.66 km) |
| Romeoville to Decatur (Illinois) | 130.26 mi (209.63 km) |
| Romeoville to Deer Park (New York) | 769.69 mi (1,238.69 km) |
| Romeoville to Deer Park (Texas) | 913.46 mi (1,470.07 km) |
| Romeoville to Deerfield (Illinois) | 39.01 mi (62.79 km) |
| Romeoville to Deerfield Beach (Florida) | 1,151.98 mi (1,853.93 km) |
| Romeoville to Defiance (Ohio) | 194.85 mi (313.58 km) |
| Romeoville to DeForest (Wisconsin) | 127.34 mi (204.93 km) |
| Romeoville to DeKalb (Illinois) | 39.30 mi (63.25 km) |
| Romeoville to Del Aire (California) | 1,726.62 mi (2,778.72 km) |
| Romeoville to Del City (Oklahoma) | 660.63 mi (1,063.19 km) |
| Romeoville to Del Rio (Texas) | 1,108.49 mi (1,783.94 km) |
| Romeoville to DeLand (Florida) | 951.28 mi (1,530.93 km) |
| Romeoville to Delano (California) | 1,718.53 mi (2,765.70 km) |
