EuroAirport Basel-Mulhouse-Freiburg (IATA: BSL, MLH, EAP, ICAO: LFSB) is an international airport 6 km (3.7 mi) northwest of Basel (Switzerland), 22 km (14 mi) southeast of Mulhouse (France), and 70 km (43 mi) south of Freiburg (Germany).
It is located in France, on the administrative territory of the commune of Saint-Louis near the Swiss and German borders.
(Wikipedia : http://en.wikipedia.org/wiki/EuroAirport_Basel-Mulhouse-Freiburg)