| Niederkassel to Corinth (Mississippi) | 4,615.41 mi (7,427.78 km) |
| Niederkassel to Corinth (Texas) | 5,033.33 mi (8,100.36 km) |
| Niederkassel to Cornelius (North Carolina) | 4,287.96 mi (6,900.81 km) |
| Niederkassel to Cornelius (Oregon) | 5,144.38 mi (8,279.08 km) |
| Niederkassel to Corning (New York) | 3,825.21 mi (6,156.08 km) |
| Niederkassel to Corona (California) | 5,686.35 mi (9,151.30 km) |
| Niederkassel to Coronado (California) | 5,744.41 mi (9,244.74 km) |
| Niederkassel to Corpus Christi (Texas) | 5,334.45 mi (8,584.97 km) |
| Niederkassel to Corsicana (Texas) | 5,067.12 mi (8,154.75 km) |
| Niederkassel to Cortland (New York) | 3,770.75 mi (6,068.43 km) |
| Niederkassel to Corvallis (Oregon) | 5,206.71 mi (8,379.39 km) |
| Niederkassel to Coshocton (Ohio) | 4,098.06 mi (6,595.18 km) |
| Niederkassel to Costa Mesa (California) | 5,708.31 mi (9,186.64 km) |
| Niederkassel to Coto de Caza (California) | 5,702.62 mi (9,177.48 km) |
| Niederkassel to Cottage Grove (Minnesota) | 4,286.74 mi (6,898.84 km) |
