Swiss International Air Lines is headquartered on the grounds of EuroAirport Basel-Mulhouse-Freiburg in Saint-Louis; while the airport is physically in France, the Swiss head office lies in the Swiss zone of the airport, and it may only be accessed from Switzerland).
Hello, a Swiss airline, had its head office in the General Aviation area of EuroAirport.

Prior to the formation of Swiss International Air Lines, the regional airline Crossair was headquartered on the grounds of EuroAirport.
Prior to its dissolution, Crossair Europe was headquartered on the grounds of EuroAirport.
The airline Farnair Switzerland formerly had its head office at EuroAirport.
As in the case of the Swiss head office, the area with the former Farnair head office may only be accessed from Switzerland.
The head office moved to its current location, the Villa Guggenheim in Allschwil, in proximity to EuroAirport, on 1 October 2011.
Swiss International Air Lines is headquartered on the grounds of EuroAirport Basel-Mulhouse-Freiburg in Saint-Louis; while the airport is physically in France, the Swiss head office lies in the Swiss zone of the airport, and it may only be accessed from Switzerland). Hello, a Swiss airline, had its head office in the General Aviation area of EuroAirport.
Prior to the formation of Swiss International Air Lines, the regional airline Crossair was headquartered on the grounds of EuroAirport. Prior to its dissolution, Crossair Europe was headquartered on the grounds of EuroAirport. The airline Farnair Switzerland formerly had its head office at EuroAirport. As in the case of the Swiss head office, the area with the former Farnair head office may only be accessed from Switzerland. The head office moved to its current location, the Villa Guggenheim in Allschwil, in proximity to EuroAirport, on 1 October 2011.
Saint-Louis, Haut-Rhin