Tourism is booming and the Olympics are looming—but travel to Paris is on shaky ground once again. The air traffic controllers are calling for a strike at Orly next week and Ryanair has been forced to cancel 100 flights today due to a last-minute action at Paris Beauvais, where it operates flights from Manchester, Birmingham, Leeds, Edinburgh and Belfast.

A Ryanair spokesperson said, “EU passengers are sick and tired of suffering unnecessary cancellations during ATC strikes. It is inexplicable that Ursula von der Leyen and the EU Commission have failed to take action to protect EU passengers’ Freedom of Movement during these repeated French ATC strikes.

A previous strike by French air traffic controllers saw almost 70% of flights canceled.

The threatened strike, called for  June 11-13, will affect more than just British travelers, though. It is expected to disrupt flights at Paris Orly and possibly Charles De Gaulle.