A series of strikes have been called by Spanish airport workers over four days in September.
The action is expected to affect airports at Madrid, Barcelona, Alicante, Malaga and Majorca from next Friday.
The airport handlers are due to walk out in the peak morning and evening periods on September 4, 11, 18 and 25.
The Workers’ Commission Union, one of the three unions involved, warned that budget carriers easyJet and Vueling would be the airlines most affected, according to media reports this morning.
The threatened stoppages – from 4.30am to 7.30am and 7.30pm to 9.30pm – are being blamed on a decision by handling firm Menzies Aviation Iberica to postpone a collective bargaining agreement after ongoing negotiations.