| Niederkassel to Camas (Washington) | 5,124.36 mi (8,246.87 km) |
| Niederkassel to Cambridge (Maryland) | 3,949.20 mi (6,355.63 km) |
| Niederkassel to Cambridge (Massachusetts) | 3,579.78 mi (5,761.09 km) |
| Niederkassel to Camden (Arkansas) | 4,852.40 mi (7,809.19 km) |
| Niederkassel to Camden (New Jersey) | 3,847.07 mi (6,191.26 km) |
| Niederkassel to Cameron Park (California) | 5,499.71 mi (8,850.93 km) |
| Niederkassel to Camp Pendleton South (California) | 5,718.12 mi (9,202.43 km) |
| Niederkassel to Camp Springs (Maryland) | 3,971.37 mi (6,391.30 km) |
| Niederkassel to Camp Verde (Arizona) | 5,467.83 mi (8,799.63 km) |
| Niederkassel to Campbell (California) | 5,609.42 mi (9,027.49 km) |
| Niederkassel to Campbellsville (Kentucky) | 4,373.69 mi (7,038.77 km) |
| Niederkassel to Campton Hills (Illinois) | 4,265.57 mi (6,864.77 km) |
| Niederkassel to Canby (Oregon) | 5,150.64 mi (8,289.15 km) |
| Niederkassel to Candelaria (Puerto Rico) | 4,513.46 mi (7,263.71 km) |
| Niederkassel to Candler-McAfee (Georgia) | 4,509.46 mi (7,257.27 km) |
