| Niederkassel to Decatur (Georgia) | 4,508.21 mi (7,255.26 km) |
| Niederkassel to Decatur (Illinois) | 4,386.87 mi (7,059.99 km) |
| Niederkassel to Deer Park (New York) | 3,738.42 mi (6,016.41 km) |
| Niederkassel to Deer Park (Texas) | 5,142.60 mi (8,276.21 km) |
| Niederkassel to Deerfield (Illinois) | 4,234.42 mi (6,814.64 km) |
| Niederkassel to Deerfield Beach (Florida) | 4,711.39 mi (7,582.24 km) |
| Niederkassel to Defiance (Ohio) | 4,146.49 mi (6,673.13 km) |
| Niederkassel to DeForest (Wisconsin) | 4,237.40 mi (6,819.44 km) |
| Niederkassel to DeKalb (Illinois) | 4,278.61 mi (6,885.76 km) |
| Niederkassel to Del Aire (California) | 5,707.19 mi (9,184.84 km) |
| Niederkassel to Del City (Oklahoma) | 4,925.13 mi (7,926.22 km) |
| Niederkassel to Del Rio (Texas) | 5,377.51 mi (8,654.27 km) |
| Niederkassel to DeLand (Florida) | 4,622.74 mi (7,439.58 km) |
| Niederkassel to Delano (California) | 5,624.04 mi (9,051.02 km) |
| Niederkassel to Delaware (Ohio) | 4,144.28 mi (6,669.58 km) |
