| Harpenden to Ianca | 1,345.70 mi (2,165.69 km) |
| Harpenden to Iasi | 1,285.92 mi (2,069.49 km) |
| Harpenden to Iernut | 1,164.99 mi (1,874.87 km) |
| Harpenden to Ineu | 1,065.17 mi (1,714.23 km) |
| Harpenden to Jibou | 1,098.37 mi (1,767.66 km) |
| Harpenden to Jilava | 1,315.89 mi (2,117.72 km) |
| Harpenden to Jimbolia | 1,041.27 mi (1,675.77 km) |
| Harpenden to Liesti | 1,332.07 mi (2,143.76 km) |
| Harpenden to Lipova | 1,070.35 mi (1,722.57 km) |
| Harpenden to Liteni | 1,230.64 mi (1,980.53 km) |
| Harpenden to Ludus | 1,158.43 mi (1,864.31 km) |
| Harpenden to Lugoj | 1,093.51 mi (1,759.84 km) |
| Harpenden to Lupeni | 1,160.26 mi (1,867.27 km) |
| Harpenden to Magurele | 1,313.26 mi (2,113.49 km) |
| Harpenden to Mangalia | 1,439.80 mi (2,317.13 km) |
