| population | |
| BUPA Harpenden Hospital | |
| Harpenden | 30240 |
 | London Luton Airport | ~ 6.84 km |
| RAF Northolt | ~ 29.28 km |
| Wycombe Air Park | ~ 38.37 km |
| London Heathrow Airport | ~ 38.82 km |
| London Stansted Airport | ~ 41.41 km |
| London City Airport | ~ 44.53 km |
| RAF Benson | ~ 55.44 km |
| Cambridge Airport | ~ 56.74 km |
| London Biggin Hill Airport | ~ 60.04 km |
