| Harpenden to Clermont (Florida) | 4,339.64 mi (6,983.97 km) |
| Harpenden to Cleveland (Mississippi) | 4,444.45 mi (7,152.65 km) |
| Harpenden to Cleveland (Ohio) | 3,718.04 mi (5,983.60 km) |
| Harpenden to Cleveland (Tennessee) | 4,140.28 mi (6,663.14 km) |
| Harpenden to Cleveland Heights (Ohio) | 3,711.88 mi (5,973.69 km) |
| Harpenden to Cliffside Park (New Jersey) | 3,439.86 mi (5,535.92 km) |
| Harpenden to Clifton (Colorado) | 4,818.34 mi (7,754.37 km) |
| Harpenden to Clifton (New Jersey) | 3,444.97 mi (5,544.14 km) |
| Harpenden to Clinton (Iowa) | 4,029.11 mi (6,484.22 km) |
| Harpenden to Clinton (Maryland) | 3,650.57 mi (5,875.03 km) |
| Harpenden to Clinton (Mississippi) | 4,499.17 mi (7,240.72 km) |
| Harpenden to Clinton (Utah) | 4,824.39 mi (7,764.11 km) |
| Harpenden to Clive (Iowa) | 4,171.83 mi (6,713.91 km) |
| Harpenden to Cloquet (Minnesota) | 3,882.32 mi (6,248.00 km) |
| Harpenden to Cloverleaf (Texas) | 4,822.18 mi (7,760.55 km) |
