| Harpenden to Corinth (Mississippi) | 4,297.01 mi (6,915.37 km) |
| Harpenden to Corinth (Texas) | 4,721.27 mi (7,598.16 km) |
| Harpenden to Cornelius (North Carolina) | 3,964.92 mi (6,380.93 km) |
| Harpenden to Cornelius (Oregon) | 4,900.30 mi (7,886.27 km) |
| Harpenden to Corning (New York) | 3,505.63 mi (5,641.76 km) |
| Harpenden to Corona (California) | 5,408.18 mi (8,703.62 km) |
| Harpenden to Coronado (California) | 5,463.46 mi (8,792.59 km) |
| Harpenden to Corpus Christi (Texas) | 5,017.26 mi (8,074.50 km) |
| Harpenden to Corsicana (Texas) | 4,753.24 mi (7,649.60 km) |
| Harpenden to Cortland (New York) | 3,451.08 mi (5,553.97 km) |
| Harpenden to Corvallis (Oregon) | 4,961.21 mi (7,984.29 km) |
| Harpenden to Coshocton (Ohio) | 3,779.84 mi (6,083.07 km) |
| Harpenden to Costa Mesa (California) | 5,430.55 mi (8,739.63 km) |
| Harpenden to Coto de Caza (California) | 5,424.05 mi (8,729.17 km) |
| Harpenden to Cottage Grove (Minnesota) | 3,986.79 mi (6,416.11 km) |
