| Harpenden to Arpajon | 250.84 mi (403.69 km) |
| Harpenden to Arques | 136.94 mi (220.38 km) |
| Harpenden to Arras | 172.07 mi (276.92 km) |
| Harpenden to Artigues-pres-Bordeaux | 480.72 mi (773.64 km) |
| Harpenden to Athis-Mons | 246.61 mi (396.88 km) |
| Harpenden to Aubagne | 650.14 mi (1,046.31 km) |
| Harpenden to Aubenas | 542.85 mi (873.63 km) |
| Harpenden to Aubergenville | 220.16 mi (354.32 km) |
| Harpenden to Aubervilliers | 234.07 mi (376.70 km) |
| Harpenden to Aubiere | 447.71 mi (720.51 km) |
| Harpenden to Aucamville | 569.05 mi (915.80 km) |
| Harpenden to Auch | 566.23 mi (911.26 km) |
| Harpenden to Auchel | 152.22 mi (244.97 km) |
| Harpenden to Audenge | 493.84 mi (794.75 km) |
| Harpenden to Audincourt | 439.18 mi (706.79 km) |
