Map - EuroAirport Basel Mulhouse Freiburg (EuroAirport Basel–Mulhouse–Freiburg)

EuroAirport Basel Mulhouse Freiburg is an international airport in the administrative commune of Saint-Louis, in the French Alsace part of the Trinational Eurodistrict of Basel. It is 4.7 km west of the tripoint of France, Germany, and Switzerland, 3.5 km northwest of the city of Basel in Switzerland, 20 km southeast of Mulhouse in France, and 46 km south-southwest of Freiburg im Breisgau in Germany. The airport is jointly administered by France and Switzerland, governed by a 1949 international convention. The airport serves as a base for easyJet Switzerland and mainly features flights to European metropolitan and leisure destinations.

Plans for the construction of a joint Swiss–French airport started in the 1930s but were halted by the Second World War. Swiss planners identified Basel as one of the four cities for which a main urban airport would be developed and recognized that the existing airfield at Sternenfeld in Birsfelden was too small and, due to the development of the adjacent river port facilities, unsuitable for expansion. The suburb of Allschwil was proposed for a new airport, and this would require being constructed across the Franco-Swiss border, leading to talks with French authorities centered on developing a single airport that would serve both countries, enhancing its international airport status.

In 1946 talks resumed and it was agreed that an airport would be built 4 km 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 1200 m runway was officially opened on 8 May.

Between autumn 1951 and spring 1953, the east–west runway was extended to 1600 m and the "Zollfreistrasse" (customs-free road) was constructed, allowing access from Basel to the departure terminal without passing through French border controls.

The first enlargement project was approved by referendum in Basel in 1960 and, over the following decades, the terminals and runways were continually extended. The north–south runway was extended further to 3900 m in 1972. In 1984, an annual total of 1 million passengers was reached. In 1987, the trademark name EuroAirport Basel–Mulhouse–Freiburg was introduced.

In 1992 a total of 2 million passengers used the airport. By 1998, this number rose up to 3 million.

In December 1998, Swissair inaugurated service to Newark. Aircraft used on this route included Airbus A310s and A330s. According to the local newspaper bz Basel, Swissair mainly launched the link to prevent another airline from starting it first. The newspaper was possibly referring to Swiss World Airways, which had expressed its desire to connect the two cities. Swiss law stipulated that if a carrier based in the country introduced a route, no other Swiss airline could add that route to its network for ten years. Swissair also hoped the flight would attract people working for pharmaceutical companies in Basel. Crossair, a subsidiary of Swissair, code-shared on the route. The carrier operated a hub at the EuroAirport, from which it flew to 40 regional destinations. As a result, passengers travelling between Newark and one of those cities could change planes in Basel.