| Harpenden to Altenbeken | 396.57 mi (638.23 km) |
| Harpenden to Altenberge | 333.27 mi (536.35 km) |
| Harpenden to Altenburg | 553.39 mi (890.60 km) |
| Harpenden to Altenholz | 469.52 mi (755.61 km) |
| Harpenden to Altenstadt | 417.13 mi (671.31 km) |
| Harpenden to Altensteig | 454.26 mi (731.06 km) |
| Harpenden to Altlandsberg | 597.88 mi (962.19 km) |
| Harpenden to Altotting | 628.29 mi (1,011.13 km) |
| Harpenden to Altusried | 546.17 mi (878.97 km) |
| Harpenden to Alzenau in Unterfranken | 427.19 mi (687.49 km) |
| Harpenden to Alzey | 396.36 mi (637.88 km) |
| Harpenden to Amberg | 558.51 mi (898.84 km) |
| Harpenden to Andernach | 349.25 mi (562.06 km) |
| Harpenden to Angermunde | 609.46 mi (980.83 km) |
| Harpenden to Anklam | 601.37 mi (967.82 km) |
