EuroAirport Basel Mulhouse Freiburg (IATA: MLH, BSL, EAP, ICAO: LFSB, LSZM) is an international airport3.5 km northwest of the city of Basel, Switzerland, 20 km southeast of Mulhouse in France, and 46 km south-southwest of Freiburg im Breisgau in Germany. The Franco-Swiss administered airport is geographically located within the French Alsace region, in the administrative commune of Saint-Louis near the border tripoint between France, Germany, and Switzerland. Due to its international status, EuroAirport has three IATA airport codes: BSL (Basel) is the Swiss code, MLH (Mulhouse) is the French code and EAP (EuroAirport) is the neutral code. The ICAO airport code is: LFSB, sometimes LSZM is used to designate the Swiss airport
Plans for the construction of a joint Swiss–French airport started in the 1930s, but were halted by the Second World War. In 1946 talks resumed and it was agreed that an airport would be built 4 kilometres (2.5 mi) north of Blotzheim, France. France would provide the land and the Swiss canton of Basel-Stadt would cover the construction costs. Basel-Stadt's Grand Council agreed to pay the costs for a provisional airport even before an international treaty was signed (which was not until 1949). Construction began on 8 March 1946 and a provisional airport with a 1,200-metre (3,900 ft) runway was officially opened on 8 May.
Today the airport serves as a base for easyJet Switzerland and features mainly flights to European metropolitan and leisure destinations.