| Niederkassel to Dumas (Texas) | 5,064.34 mi (8,150.27 km) |
| Niederkassel to Dumont (New Jersey) | 3,757.26 mi (6,046.72 km) |
| Niederkassel to Duncan (Oklahoma) | 4,990.63 mi (8,031.64 km) |
| Niederkassel to Duncanville (Texas) | 5,053.93 mi (8,133.51 km) |
| Niederkassel to Dundalk (Maryland) | 3,932.94 mi (6,329.45 km) |
| Niederkassel to Dunedin (Florida) | 4,734.81 mi (7,619.94 km) |
| Niederkassel to Dunkirk (New York) | 3,898.69 mi (6,274.33 km) |
| Niederkassel to Dunmore (Pennsylvania) | 3,800.75 mi (6,116.71 km) |
| Niederkassel to Dunwoody (Georgia) | 4,500.37 mi (7,242.65 km) |
| Niederkassel to Durango (Colorado) | 5,187.16 mi (8,347.92 km) |
| Niederkassel to Durant (Oklahoma) | 4,963.26 mi (7,987.60 km) |
| Niederkassel to Durham (North Carolina) | 4,183.80 mi (6,733.17 km) |
| Niederkassel to Dyer (Indiana) | 4,253.93 mi (6,846.04 km) |
| Niederkassel to Dyersburg (Tennessee) | 4,593.28 mi (7,392.18 km) |
| Niederkassel to Eagan (Minnesota) | 4,294.85 mi (6,911.89 km) |
