| Niederkassel to Dardenne Prairie (Missouri) | 4,508.29 mi (7,255.39 km) |
| Niederkassel to Darien (Illinois) | 4,259.50 mi (6,855.00 km) |
| Niederkassel to Davenport (Iowa) | 4,364.63 mi (7,024.19 km) |
| Niederkassel to Davidson (North Carolina) | 4,285.13 mi (6,896.25 km) |
| Niederkassel to Davie (Florida) | 4,729.56 mi (7,611.49 km) |
| Niederkassel to Davis (California) | 5,527.16 mi (8,895.10 km) |
| Niederkassel to Dayton (Nevada) | 5,425.87 mi (8,732.10 km) |
| Niederkassel to Dayton (Ohio) | 4,211.51 mi (6,777.78 km) |
| Niederkassel to Daytona Beach (Florida) | 4,606.00 mi (7,412.64 km) |
| Niederkassel to De Pere (Wisconsin) | 4,134.49 mi (6,653.82 km) |
| Niederkassel to De Witt (New York) | 3,748.08 mi (6,031.96 km) |
| Niederkassel to Dearborn (Michigan) | 4,054.52 mi (6,525.12 km) |
| Niederkassel to Dearborn Heights (Michigan) | 4,056.76 mi (6,528.73 km) |
| Niederkassel to DeBary (Florida) | 4,631.34 mi (7,453.42 km) |
| Niederkassel to Decatur (Alabama) | 4,574.83 mi (7,362.48 km) |
