| Harpenden to Ashwaubenon (Wisconsin) | 3,826.21 mi (6,157.70 km) |
| Harpenden to Aspen Hill (Maryland) | 3,642.21 mi (5,861.57 km) |
| Harpenden to Astoria (Oregon) | 4,881.69 mi (7,856.32 km) |
| Harpenden to Atascadero (California) | 5,412.99 mi (8,711.37 km) |
| Harpenden to Atascocita (Texas) | 4,813.20 mi (7,746.10 km) |
| Harpenden to Atchison (Kansas) | 4,322.12 mi (6,955.78 km) |
| Harpenden to Athens (Alabama) | 4,242.93 mi (6,828.33 km) |
| Harpenden to Athens (Georgia) | 4,139.48 mi (6,661.85 km) |
| Harpenden to Athens (Ohio) | 3,832.79 mi (6,168.28 km) |
| Harpenden to Athens (Tennessee) | 4,116.23 mi (6,624.43 km) |
| Harpenden to Athens (Texas) | 4,722.41 mi (7,599.98 km) |
| Harpenden to Atlanta (Georgia) | 4,191.40 mi (6,745.41 km) |
| Harpenden to Atlantic Beach (Florida) | 4,236.73 mi (6,818.37 km) |
| Harpenden to Atlantic City (New Jersey) | 3,522.27 mi (5,668.55 km) |
| Harpenden to Attleboro (Massachusetts) | 3,282.82 mi (5,283.19 km) |
