| Harpenden to Ittiri | 883.12 mi (1,421.25 km) |
| Harpenden to Ivrea | 576.83 mi (928.33 km) |
| Harpenden to L'Aquila | 917.16 mi (1,476.03 km) |
| Harpenden to La Loggia | 599.29 mi (964.47 km) |
| Harpenden to La Maddalena | 865.18 mi (1,392.38 km) |
| Harpenden to La Spezia | 709.81 mi (1,142.33 km) |
| Harpenden to Lacchiarella | 623.17 mi (1,002.90 km) |
| Harpenden to Ladispoli | 896.81 mi (1,443.27 km) |
| Harpenden to Lainate | 607.17 mi (977.14 km) |
| Harpenden to Laives | 645.49 mi (1,038.81 km) |
| Harpenden to Lana | 630.05 mi (1,013.97 km) |
| Harpenden to Lanciano | 955.91 mi (1,538.39 km) |
| Harpenden to Langhirano | 696.17 mi (1,120.38 km) |
| Harpenden to Lanuvio | 931.05 mi (1,498.38 km) |
| Harpenden to Lariano | 932.43 mi (1,500.60 km) |
