| Niederkassel to Clermont (Florida) | 4,665.38 mi (7,508.20 km) |
| Niederkassel to Cleveland (Mississippi) | 4,762.14 mi (7,663.92 km) |
| Niederkassel to Cleveland (Ohio) | 4,034.97 mi (6,493.66 km) |
| Niederkassel to Cleveland (Tennessee) | 4,461.17 mi (7,179.56 km) |
| Niederkassel to Cleveland Heights (Ohio) | 4,028.87 mi (6,483.84 km) |
| Niederkassel to Cliffside Park (New Jersey) | 3,762.53 mi (6,055.21 km) |
| Niederkassel to Clifton (Colorado) | 5,105.23 mi (8,216.07 km) |
| Niederkassel to Clifton (New Jersey) | 3,767.52 mi (6,063.24 km) |
| Niederkassel to Clinton (Iowa) | 4,337.32 mi (6,980.24 km) |
| Niederkassel to Clinton (Maryland) | 3,973.37 mi (6,394.52 km) |
| Niederkassel to Clinton (Mississippi) | 4,818.43 mi (7,754.52 km) |
| Niederkassel to Clinton (Utah) | 5,100.89 mi (8,209.08 km) |
| Niederkassel to Clive (Iowa) | 4,476.22 mi (7,203.78 km) |
| Niederkassel to Cloquet (Minnesota) | 4,179.14 mi (6,725.67 km) |
| Niederkassel to Cloverleaf (Texas) | 5,139.58 mi (8,271.36 km) |
