| Niederkassel to Clarkston (Georgia) | 4,503.96 mi (7,248.42 km) |
| Niederkassel to Clarksville (Indiana) | 4,342.06 mi (6,987.87 km) |
| Niederkassel to Clarksville (Tennessee) | 4,488.91 mi (7,224.20 km) |
| Niederkassel to Clawson (Michigan) | 4,041.75 mi (6,504.57 km) |
| Niederkassel to Clay (Alabama) | 4,603.86 mi (7,409.20 km) |
| Niederkassel to Clayton (California) | 5,569.20 mi (8,962.76 km) |
| Niederkassel to Clayton (Missouri) | 4,498.95 mi (7,240.37 km) |
| Niederkassel to Clayton (North Carolina) | 4,180.72 mi (6,728.23 km) |
| Niederkassel to Clayton (Ohio) | 4,212.23 mi (6,778.93 km) |
| Niederkassel to Clearfield (Utah) | 5,101.70 mi (8,210.39 km) |
| Niederkassel to Clearlake (California) | 5,526.95 mi (8,894.77 km) |
| Niederkassel to Clearwater (Florida) | 4,736.55 mi (7,622.75 km) |
| Niederkassel to Cleburne (Texas) | 5,088.01 mi (8,188.35 km) |
| Niederkassel to Clemmons (North Carolina) | 4,241.11 mi (6,825.40 km) |
| Niederkassel to Clemson (South Carolina) | 4,403.84 mi (7,087.30 km) |
