The Unite union has confirmed around 370 workers employed by Edinburgh airport have backed industrial action in a dispute over pay, while a further 320 workers employed by ICTS and Menzies Aviation at Glasgow airport have also voted in favour of striking after rejecting pay offers.
The union said strike dates would be announced "in the coming days", with action expected to coincide with the World Cup and Commonwealth Games events taking place in Glasgow.
Sharon Graham, general secretary of Unite the Union, said the disputes were the result of employers failing to offer fair pay deals despite strong profits.
