The Easyjet cabin teams in Spain will be on strike for their salary for three days next week.
USO Union in Spain said industrial action would take place from Wednesday June 25 to Friday, June 27.
He said that more than 650 on -board agents – based in Alicante, Barcelona, Malaga and Majorca Palma – could be involved.
However, the airline said it intended to operate normally and hoped to avoid any disruption.
The union said Easyjet cabin crew Win much less in Spain than in other countries.
He added that the objective of the strike was “to level the working and salary conditions of the crews in Spain with those in other bases of the company in Europe”.
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A spokesperson for the airline said he would do everything possible to minimize the impact of strikes.
They added that Easyjet employed teams in eight different countries “under local terms and conditions”.
Regulations in Spain oblige air workers to provide a minimum level of service during industrial action to limit disturbances.