| Harpenden to Coldwater (Michigan) | 3,825.48 mi (6,156.52 km) |
| Harpenden to Colesville (Maryland) | 3,639.79 mi (5,857.68 km) |
| Harpenden to College (Alaska) | 4,189.78 mi (6,742.80 km) |
| Harpenden to College Park (Georgia) | 4,199.30 mi (6,758.12 km) |
| Harpenden to College Park (Maryland) | 3,640.54 mi (5,858.89 km) |
| Harpenden to College Station (Texas) | 4,824.60 mi (7,764.44 km) |
| Harpenden to Collegedale (Tennessee) | 4,153.71 mi (6,684.75 km) |
| Harpenden to Colleyville (Texas) | 4,737.43 mi (7,624.16 km) |
| Harpenden to Collierville (Tennessee) | 4,338.79 mi (6,982.60 km) |
| Harpenden to Collinsville (Illinois) | 4,172.34 mi (6,714.74 km) |
| Harpenden to Colonia (New Jersey) | 3,463.15 mi (5,573.40 km) |
| Harpenden to Colonial Heights (Virginia) | 3,738.55 mi (6,016.62 km) |
| Harpenden to Colonial Park (Pennsylvania) | 3,576.97 mi (5,756.57 km) |
| Harpenden to Colorado Springs (Colorado) | 4,703.08 mi (7,568.87 km) |
| Harpenden to Colton (California) | 5,389.48 mi (8,673.53 km) |
