| Hemel Hempstead to Castle Rock (Colorado) | 4,678.06 mi (7,528.61 km) |
| Hemel Hempstead to Castro Valley (California) | 5,324.95 mi (8,569.68 km) |
| Hemel Hempstead to Catalina Foothills (Arizona) | 5,270.37 mi (8,481.85 km) |
| Hemel Hempstead to Cataño (Puerto Rico) | 4,189.84 mi (6,742.89 km) |
| Hemel Hempstead to Cathedral City (California) | 5,373.04 mi (8,647.07 km) |
| Hemel Hempstead to Catonsville (Maryland) | 3,617.32 mi (5,821.51 km) |
| Hemel Hempstead to Cave Spring (Virginia) | 3,843.33 mi (6,185.24 km) |
| Hemel Hempstead to Cayce (South Carolina) | 4,041.24 mi (6,503.75 km) |
| Hemel Hempstead to Cayey (Puerto Rico) | 4,207.64 mi (6,771.55 km) |
| Hemel Hempstead to Cedar City (Utah) | 5,047.02 mi (8,122.40 km) |
| Hemel Hempstead to Cedar Falls (Iowa) | 4,076.82 mi (6,561.02 km) |
| Hemel Hempstead to Cedar Hill (Texas) | 4,743.78 mi (7,634.37 km) |
| Hemel Hempstead to Cedar Lake (Indiana) | 3,943.20 mi (6,345.96 km) |
| Hemel Hempstead to Cedar Mill (Oregon) | 4,893.02 mi (7,874.56 km) |
| Hemel Hempstead to Cedar Park (Texas) | 4,885.03 mi (7,861.70 km) |
