EasyJet check-in staff will stage a series of strikes totalling 17 days at Stansted Airport - starting later this month.
Unite the Union has announced the industrial action will begin on Thursday July 25 - just as the summer holiday season ramps up.
The strikes are part of an ongoing pay dispute between its members and Stobart Aviation Services Limited.
The company employs 43 people as part of its contract for EasyJet check-in staff at Stansted.
"Unite apologises in advance to affected passengers, but says that the best way to help avoid the dispute is if the public contacts EasyJet and asks the airline to insist that Stobart does everything it can to genuinely resolve the situation."
The walk-outs will take place on:
July 25 to 29
August 2 to 5
August 9 to 12
August 16 to 19
August 23 to 27
Unite claims workers employed by other companies at Stansted are being paid up to 20 per cent more to do the same job.
It insists the strikes will cause "severe disruption to thousands of EasyJet passengers".
But EasyJet assured customers there would be no impact on people travelling with them.
"We are aware dates have been published for proposed industrial action by Stobart Aviation check-in staff at London Stansted Airport.