| Niederkassel to Cookeville (Tennessee) | 4,438.64 mi (7,143.30 km) |
| Niederkassel to Coolidge (Arizona) | 5,550.37 mi (8,932.45 km) |
| Niederkassel to Coon Rapids (Minnesota) | 4,282.25 mi (6,891.62 km) |
| Niederkassel to Cooper City (Florida) | 4,731.18 mi (7,614.10 km) |
| Niederkassel to Coos Bay (Oregon) | 5,301.71 mi (8,532.28 km) |
| Niederkassel to Copiague (New York) | 3,745.31 mi (6,027.49 km) |
| Niederkassel to Coppell (Texas) | 5,039.96 mi (8,111.02 km) |
| Niederkassel to Copperas Cove (Texas) | 5,172.68 mi (8,324.62 km) |
| Niederkassel to Coral Gables (Florida) | 4,747.96 mi (7,641.11 km) |
| Niederkassel to Coral Springs (Florida) | 4,718.68 mi (7,593.98 km) |
| Niederkassel to Coral Terrace (Florida) | 4,747.20 mi (7,639.88 km) |
| Niederkassel to Coralville (Iowa) | 4,393.41 mi (7,070.51 km) |
| Niederkassel to Coram (New York) | 3,720.47 mi (5,987.51 km) |
| Niederkassel to Corcoran (California) | 5,613.77 mi (9,034.49 km) |
| Niederkassel to Cordele (Georgia) | 4,577.44 mi (7,366.68 km) |
