Portugal's TAP will cancel 1,316 flights due to a strike planned for the end of January, affecting nearly 160,000 passengers, the state-owned airline said on Thursday 19 January.
TAP, currently under an EU-approved €3.2 billion bailout plan, said it expected the walkout to cost the company about €48 million in revenue.
A further loss of €20 million was also expected due to the potential impact on sales, TAP said.
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Demanding higher wages and better working conditions, cabin crew union SNPVAC announced earlier this month it would walk out from 25-31 January. It follows a shorter strike on 8-9 December, which led to the cancellation of 360 flights.
"The decision to go ahead with a strike ... throws out of the window all the work of rapprochement between the parties, leaving thousands of TAP customers with their plans defrauded and seriously affecting the company's results," TAP said in a statement.
TAP said it was drawing up a contingency plan to minimise the impact on customers, such as by adjusting operations and making it easier to re-book flights and get refunds.
The EU restructuring plan includes downsizing TAP's fleet, axing more than 2,900 jobs and cutting most workers' wages by up to 25%. But cuts have come at a time when surging inflation has left workers struggling with higher costs.