| Niederkassel to Cloverly (Maryland) | 3,960.70 mi (6,374.12 km) |
| Niederkassel to Clovis (California) | 5,573.14 mi (8,969.10 km) |
| Niederkassel to Clovis (New Mexico) | 5,184.55 mi (8,343.72 km) |
| Niederkassel to Clute (Texas) | 5,188.75 mi (8,350.48 km) |
| Niederkassel to Coachella (California) | 5,653.14 mi (9,097.85 km) |
| Niederkassel to Coalinga (California) | 5,632.07 mi (9,063.94 km) |
| Niederkassel to Coamo (Puerto Rico) | 4,536.75 mi (7,301.19 km) |
| Niederkassel to Coatesville (Pennsylvania) | 3,873.42 mi (6,233.67 km) |
| Niederkassel to Cockeysville (Maryland) | 3,928.74 mi (6,322.70 km) |
| Niederkassel to Cocoa (Florida) | 4,633.31 mi (7,456.60 km) |
| Niederkassel to Cocoa Beach (Florida) | 4,629.95 mi (7,451.19 km) |
| Niederkassel to Coconut Creek (Florida) | 4,715.02 mi (7,588.08 km) |
| Niederkassel to Coeur d'Alene (Idaho) | 4,859.11 mi (7,819.98 km) |
| Niederkassel to Cohoes (New York) | 3,665.94 mi (5,899.76 km) |
| Niederkassel to Cold Springs (Nevada) | 5,411.57 mi (8,709.09 km) |
