| Harpenden to Crest Hill (Illinois) | 3,961.74 mi (6,375.80 km) |
| Harpenden to Crestview (Florida) | 4,428.71 mi (7,127.32 km) |
| Harpenden to Crestwood (Illinois) | 3,944.17 mi (6,347.52 km) |
| Harpenden to Crestwood (Missouri) | 4,192.44 mi (6,747.09 km) |
| Harpenden to Creve Coeur (Missouri) | 4,189.80 mi (6,742.83 km) |
| Harpenden to Crofton (Maryland) | 3,629.41 mi (5,840.97 km) |
| Harpenden to Crossville (Tennessee) | 4,109.29 mi (6,613.26 km) |
| Harpenden to Crowley (Louisiana) | 4,689.19 mi (7,546.52 km) |
| Harpenden to Crowley (Texas) | 4,761.75 mi (7,663.30 km) |
| Harpenden to Crown Point (Indiana) | 3,939.99 mi (6,340.80 km) |
| Harpenden to Crystal (Minnesota) | 3,991.77 mi (6,424.14 km) |
| Harpenden to Crystal Lake (Illinois) | 3,939.20 mi (6,339.52 km) |
| Harpenden to Cudahy (California) | 5,422.20 mi (8,726.19 km) |
| Harpenden to Cudahy (Wisconsin) | 3,888.30 mi (6,257.61 km) |
| Harpenden to Cullman (Alabama) | 4,268.43 mi (6,869.37 km) |
