| Niederkassel to Commerce City (Colorado) | 4,945.04 mi (7,958.27 km) |
| Niederkassel to Compton (California) | 5,704.36 mi (9,180.28 km) |
| Niederkassel to Comstock Park (Michigan) | 4,112.47 mi (6,618.38 km) |
| Niederkassel to Concord (California) | 5,569.23 mi (8,962.82 km) |
| Niederkassel to Concord (Missouri) | 4,506.60 mi (7,252.67 km) |
| Niederkassel to Concord (New Hampshire) | 3,561.12 mi (5,731.07 km) |
| Niederkassel to Concord (North Carolina) | 4,281.95 mi (6,891.13 km) |
| Niederkassel to Conneaut (Ohio) | 3,971.44 mi (6,391.42 km) |
| Niederkassel to Connersville (Indiana) | 4,253.38 mi (6,845.16 km) |
| Niederkassel to Conroe (Texas) | 5,123.07 mi (8,244.79 km) |
| Niederkassel to Converse (Texas) | 5,273.91 mi (8,487.55 km) |
| Niederkassel to Conway (Arkansas) | 4,760.23 mi (7,660.85 km) |
| Niederkassel to Conway (Florida) | 4,651.01 mi (7,485.08 km) |
| Niederkassel to Conway (South Carolina) | 4,292.35 mi (6,907.87 km) |
| Niederkassel to Conyers (Georgia) | 4,501.51 mi (7,244.48 km) |
