Jet2 is warning customers that industrial action by air traffic controllers could disrupt flights from Thursday evening into Saturday morning.
EasyJet issued a similar travel alert to its customers yesterday.
French air traffic controllers will be joining a national strike later today, which could affect flights travelling through French air space as well as flights to and from France.
In a message to customers, Jet2 said: “For us to achieve departures as close to our published schedules, it is necessary for us to close our check-in desks and board flights in line with your flight’s scheduled departure time.
“Check-in will close 40 minutes before your scheduled departure, and we will board your flight on time in order to get you on your way as quickly as possible. This way, we are in a position for an immediate departure when required.
“We apologise in advance if this results in prolonged waiting times onboard the aircraft whiles waiting for clearance to depart. Our dedicated operations teams are working hard behind the scenes at our UK-based HQ to ensure that any disruption is kept to a minimum.”
Air traffic controllers are due to take industrial action from 18:00 BST on Thursday till 05:00 BST on Saturday.