| Harpenden to Imatra | 1,269.64 mi (2,043.28 km) |
| Harpenden to Jakobstad | 1,167.94 mi (1,879.61 km) |
| Harpenden to Jamsa | 1,176.20 mi (1,892.91 km) |
| Harpenden to Janakkala | 1,133.91 mi (1,824.86 km) |
| Harpenden to Jarvenpaa | 1,136.72 mi (1,829.37 km) |
| Harpenden to Joensuu | 1,331.40 mi (2,142.67 km) |
| Harpenden to Joutseno | 1,259.95 mi (2,027.70 km) |
| Harpenden to Jyvaskyla | 1,203.42 mi (1,936.72 km) |
| Harpenden to Jyvaskylan Maalaiskunta | 1,204.79 mi (1,938.93 km) |
| Harpenden to Kaarina | 1,048.80 mi (1,687.88 km) |
| Harpenden to Kajaani | 1,318.99 mi (2,122.71 km) |
| Harpenden to Kalajoki | 1,222.40 mi (1,967.27 km) |
| Harpenden to Kangasala | 1,131.25 mi (1,820.57 km) |
| Harpenden to Kankaanpaa | 1,092.96 mi (1,758.95 km) |
| Harpenden to Karhula | 1,196.92 mi (1,926.26 km) |
