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.