| Niederkassel to Culpeper (Virginia) | 4,030.15 mi (6,485.89 km) |
| Niederkassel to Culver City (California) | 5,702.75 mi (9,177.69 km) |
| Niederkassel to Cumberland (Maryland) | 4,005.54 mi (6,446.30 km) |
| Niederkassel to Cupertino (California) | 5,609.76 mi (9,028.03 km) |
| Niederkassel to Cutler Bay (Florida) | 4,757.14 mi (7,655.87 km) |
| Niederkassel to Cutlerville (Michigan) | 4,121.89 mi (6,633.54 km) |
| Niederkassel to Cuyahoga Falls (Ohio) | 4,043.32 mi (6,507.09 km) |
| Niederkassel to Cypress (California) | 5,703.20 mi (9,178.41 km) |
| Niederkassel to Cypress Gardens (Florida) | 4,690.62 mi (7,548.83 km) |
| Niederkassel to Cypress Lake (Florida) | 4,773.84 mi (7,682.75 km) |
| Niederkassel to D'Iberville (Mississippi) | 4,858.63 mi (7,819.22 km) |
| Niederkassel to Dakota Ridge (Colorado) | 4,967.91 mi (7,995.07 km) |
| Niederkassel to Dale City (Virginia) | 3,995.74 mi (6,430.53 km) |
| Niederkassel to Dallas (Georgia) | 4,522.79 mi (7,278.73 km) |
| Niederkassel to Dallas (Oregon) | 5,186.46 mi (8,346.80 km) |
