| Harpenden to Aldine (Texas) | 4,823.81 mi (7,763.17 km) |
| Harpenden to Alexander City (Alabama) | 4,294.04 mi (6,910.59 km) |
| Harpenden to Alexandria (Louisiana) | 4,637.75 mi (7,463.73 km) |
| Harpenden to Alexandria (Minnesota) | 4,023.00 mi (6,474.39 km) |
| Harpenden to Alexandria (Virginia) | 3,654.77 mi (5,881.78 km) |
| Harpenden to Algonquin (Illinois) | 3,941.76 mi (6,343.66 km) |
| Harpenden to Alhambra (California) | 5,413.75 mi (8,712.59 km) |
| Harpenden to Alice (Texas) | 5,042.68 mi (8,115.42 km) |
| Harpenden to Aliso Viejo (California) | 5,429.62 mi (8,738.13 km) |
| Harpenden to Allen (Texas) | 4,707.96 mi (7,576.74 km) |
| Harpenden to Allen Park (Michigan) | 3,742.27 mi (6,022.61 km) |
| Harpenden to Allendale (Michigan) | 3,814.31 mi (6,138.54 km) |
| Harpenden to Allentown (Pennsylvania) | 3,510.05 mi (5,648.88 km) |
| Harpenden to Alliance (Ohio) | 3,721.52 mi (5,989.21 km) |
| Harpenden to Allison Park (Pennsylvania) | 3,690.91 mi (5,939.95 km) |
