| Niederkassel to Crest Hill (Illinois) | 4,272.64 mi (6,876.15 km) |
| Niederkassel to Crestview (Florida) | 4,751.66 mi (7,647.06 km) |
| Niederkassel to Crestwood (Illinois) | 4,255.35 mi (6,848.32 km) |
| Niederkassel to Crestwood (Missouri) | 4,505.12 mi (7,250.28 km) |
| Niederkassel to Creve Coeur (Missouri) | 4,502.27 mi (7,245.71 km) |
| Niederkassel to Crofton (Maryland) | 3,952.12 mi (6,360.33 km) |
| Niederkassel to Crossville (Tennessee) | 4,429.41 mi (7,128.45 km) |
| Niederkassel to Crowley (Louisiana) | 5,008.62 mi (8,060.59 km) |
| Niederkassel to Crowley (Texas) | 5,074.13 mi (8,166.02 km) |
| Niederkassel to Crown Point (Indiana) | 4,251.89 mi (6,842.76 km) |
| Niederkassel to Crystal (Minnesota) | 4,290.75 mi (6,905.30 km) |
| Niederkassel to Crystal Lake (Illinois) | 4,248.89 mi (6,837.92 km) |
| Niederkassel to Cudahy (California) | 5,698.90 mi (9,171.50 km) |
| Niederkassel to Cudahy (Wisconsin) | 4,197.39 mi (6,755.05 km) |
| Niederkassel to Cullman (Alabama) | 4,588.78 mi (7,384.93 km) |
