| Hennef to Castle Rock (Colorado) | 4,981.64 mi (8,017.18 km) |
| Hennef to Castro Valley (California) | 5,595.27 mi (9,004.71 km) |
| Hennef to Catalina Foothills (Arizona) | 5,575.08 mi (8,972.23 km) |
| Hennef to Cataño (Puerto Rico) | 4,519.42 mi (7,273.30 km) |
| Hennef to Cathedral City (California) | 5,663.74 mi (9,114.91 km) |
| Hennef to Catonsville (Maryland) | 3,954.07 mi (6,363.46 km) |
| Hennef to Cave Spring (Virginia) | 4,179.84 mi (6,726.80 km) |
| Hennef to Cayce (South Carolina) | 4,379.65 mi (7,048.37 km) |
| Hennef to Cayey (Puerto Rico) | 4,536.88 mi (7,301.40 km) |
| Hennef to Cedar City (Utah) | 5,337.99 mi (8,590.67 km) |
| Hennef to Cedar Falls (Iowa) | 4,393.59 mi (7,070.81 km) |
| Hennef to Cedar Hill (Texas) | 5,069.62 mi (8,158.77 km) |
| Hennef to Cedar Lake (Indiana) | 4,268.00 mi (6,868.69 km) |
| Hennef to Cedar Mill (Oregon) | 5,145.29 mi (8,280.55 km) |
| Hennef to Cedar Park (Texas) | 5,212.31 mi (8,388.40 km) |
