| Harpenden to Hisarcik | 1,657.39 mi (2,667.32 km) |
| Harpenden to Hizan | 2,249.83 mi (3,620.76 km) |
| Harpenden to Hopa | 2,076.18 mi (3,341.28 km) |
| Harpenden to Huyuk | 1,812.33 mi (2,916.66 km) |
| Harpenden to Idil | 2,266.04 mi (3,646.84 km) |
| Harpenden to Igdir | 2,247.14 mi (3,616.43 km) |
| Harpenden to Ihsaniye | 1,715.02 mi (2,760.05 km) |
| Harpenden to Ilic | 2,034.05 mi (3,273.49 km) |
| Harpenden to Ilica | 2,121.05 mi (3,413.49 km) |
| Harpenden to Incesu | 1,928.76 mi (3,104.04 km) |
| Harpenden to Incirliova | 1,663.38 mi (2,676.95 km) |
| Harpenden to Inebolu | 1,728.32 mi (2,781.46 km) |
| Harpenden to Inegol | 1,631.30 mi (2,625.32 km) |
| Harpenden to Ipsala | 1,467.86 mi (2,362.30 km) |
| Harpenden to Iskenderun | 2,061.90 mi (3,318.31 km) |
