El Dorado/Captain Jack Thomas Memorial Airport (IATA: EDK, ICAO: KEQA, FAA LID: EQA) is a general aviation public use airport located three miles (5 km) southeast of the central business district of El Dorado, in Butler County, Kansas, United States. This airport is publicly owned by the City of El Dorado.

Although most U.S. airports use the same three-letter location identifier for the FAA and IATA, this airport is assigned EQA by the FAA and EDK by the IATA. The airport's ICAO identifier is KEQA. It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017–2021, in which it is categorized as a local general aviation facility.