Easyjet and Ryanair have been forced to cancel up to 300 flights going to France or surrounding countries due to strike action this weekend.
EasyJet has announced more than 200 flights have been scrapped due to industrial action by air traffic controllers in Marseille on Saturday (June 23) and Sunday (June 23).
Likewise up to 100 flights by Ryanair have been cancelled, with widespread chaos expected for travellers, Mirror Online reports .
A spokesman for EasyJet said: “Due to local air traffic control industrial action from 23rd to 24th June affecting Marseille airspace, EasyJet, like all airlines, has been required to cancel 100 flights on Saturday 23rd and 108 flights on Sunday 24th June which include flights to and from Marseille and some flights which pass through Marseille airspace which are unable to be rerouted.
“EasyJet will be doing everything possible to minimise the effects of the strike action for our customers and priority for cancellation has been given to those flights where passengers could find alternative options."
Customers have been told to check the status of their flight on the EasyJet website.
A spokesman for Ryanair said: "Due to yet another French ATC strike, Ryanair regrets to inform customers that it has been forced to cancel a number of flights (we expect up to 100 flights) on Saturday and Sunday
"All affected customers have been contacted by email and text message and advised of their options: a full refund, rebooking on to the next available flight or transferring to an alternative flight.
"As a result of this unjustified strike action, we also expect some significant delays to flights to/from/over France and we advise customers due to travel on Saturday & Sunday to check the status of their flight on the Ryanair.com website."
Other airlines are expected to be affected.
A spokeswoman for British Airways said they are running a normal schedule this weekend.
Last week Ryanair warned that Europe's skies could be empty all summer due to French ATC industrial action.
Ryanair itself was forced to cancel “just over 1,000 flights, almost all due to ATC staff shortages and strikes” in May, which is 24 times as many as it cancelled in the same month last year.