Pilot Briefing for Flight Operations at St Athan Airfield Provided for eCube Solutions General ICAO code EGDX IATA code DGX St Athan is an ex-military RAF airfield located on the South Wales coast, twelve miles to the west of the city of Cardiff. It is now owned by the Welsh Government and operated by a civilian contractor on their behalf although the airfield is still regulated by the Military Aviation Authority (MAA). A process is under way to complete the transition to regulation by the Civil Aviation Authority by 2019. Information taken from the manufacturers’ Airport Planning Manuals indicates the airfield is suitable for aircraft up to and including the Boeing 747 in size for landing on an empty ferry flight with normal fuel reserves. This information must be checked against individual aircraft Flight Manual data and operators own Operations Manuals.