Leuchars Station Airfield, designated EGQL and IATA code ADX, is located near the village of Leuchars in Fife, Scotland. Formerly a Royal Air Force station, RAF Leuchars was one of the United Kingdom's primary air defence bases and home to fast-jet interceptor squadrons for many decades. In 2015, RAF Leuchars was transferred to the British Army and redesignated Leuchars Station, becoming a major Army garrison. The airfield remains operational in a limited military capacity, though its role as a frontline fast-jet base has ended. The site retains historical significance as one of Scotland's longest-serving military airfields, with aviation activity dating back to the First World War era. The IATA code ADX and ICAO code EGQL remain assigned to the airfield, though it no longer serves scheduled commercial passenger flights. The airfield has occasionally hosted aviation events and military exercises.