EuroAirport Basel–Mulhouse–Freiburg

Construction begins March 8, 1946; a provisional airport with a 1,200-meter runway opens May 8, 1946, on French territory near Blotzheim, ahead of the formal bilateral treaty.

France and Switzerland formalize the airport's binational status by treaty, establishing joint governance (eight board representatives per country plus German advisers) even though the site sits entirely in France.

The north-south runway is extended to 3,900 meters, enabling long-haul and larger jet operations.

The trademark 'EuroAirport Basel–Mulhouse–Freiburg' is introduced, reflecting the tri-national catchment area the airport serves.

easyJet opens a base at EuroAirport, which becomes its largest base outside the UK and drives a doubling of passenger numbers within a few years (1 million in 1984 to 4 million by 2006).

Switzerland's accession to the Schengen Area requires reorganizing the airside into separate Swiss/Schengen and French/non-Schengen zones, formalizing the airport's dual customs system.

Reports surface that firefighting foam used at the airport before 2017 contaminated tap water for roughly 60,000 residents in 11 surrounding French communes, with cleanup costs estimated up to €20 million — an ongoing environmental and public-health issue as of 2026.