HUY stands for Grimsby Humberside Airport, while IEV stands for Kyiv Zhuliany Intl Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. Kyiv Boryspil Intl Airport (KBP), Lviv Danylo Halytskyi Intl Airport (LWO), Odesa Intl Airport (ODS), Kharkiv Intl Airport (HRK), Dnipro Dnepropetrovsk Airport (DNK) are other airports near this flight route and their unique identifiers/IATA codes.