| Hennef to Caguas (Puerto Rico) | 4,525.42 mi (7,282.96 km) |
| Hennef to Cahokia (Illinois) | 4,507.81 mi (7,254.63 km) |
| Hennef to Calabasas (California) | 5,712.13 mi (9,192.78 km) |
| Hennef to Caldwell (Idaho) | 5,097.92 mi (8,204.32 km) |
| Hennef to Caledonia (Wisconsin) | 4,215.32 mi (6,783.90 km) |
| Hennef to Calera (Alabama) | 4,648.76 mi (7,481.46 km) |
| Hennef to Calexico (California) | 5,701.12 mi (9,175.07 km) |
| Hennef to Calhoun (Georgia) | 4,508.92 mi (7,256.41 km) |
| Hennef to California (Maryland) | 3,988.69 mi (6,419.17 km) |
| Hennef to California City (California) | 5,628.36 mi (9,057.97 km) |
| Hennef to Callaway (Florida) | 4,752.60 mi (7,648.57 km) |
| Hennef to Calumet City (Illinois) | 4,260.37 mi (6,856.40 km) |
| Hennef to Calverton (Maryland) | 3,971.83 mi (6,392.04 km) |
| Hennef to Camano (Washington) | 4,979.46 mi (8,013.66 km) |
| Hennef to Camarillo (California) | 5,717.75 mi (9,201.83 km) |
