Seven British airports, including Heathrow, Gatwick and Stansted, will be hit by strike action in the New Year.
Workers at the airports have voted in favour of industrial action on 7, 14 and 17 January.
The walkouts are in protest at the closure of a final salary pension scheme for new airport workers.
The strikes affects airports run by the British Airports Authority, namely Heathrow, Gatwick, Stansted, Southampton, Glasgow, Edinburgh and Aberdeen.
The workers involved include firefighters, maintenance and security staff as well as clerical workers.
The first strike starts at 6am on 7 January for 24 hours. The second is planned for 6am on 14 January, also for 24 hours, and the third is for 48 hours starting at 6am on 17 January.
The Unite trade union, whose members voted for the action, said it expected the strikes would close all seven airports and cause huge disruption to travellers.
