A further escalation of industrial action will see mixed fleet cabin crew at British Airways walk out for seven consecutive days.
The latest action in an ongoing dispute over pay will be staged from Friday (March 3) until midnight on the following Thursday (March 9).
The announcement by the Unite union came at the end of the fourth wave of strike action for far this year on Saturday.
The airline said: “We have flown all customers to their destinations during the previous strikes by mixed fleet Unite and we will ensure this happens again.
“We will publish more details this week once we have finalised our contingency plans.
“Our pay offer for mixed fleet crew is consistent with the deal accepted by 92% of colleagues across the airline, most of whom are represented by Unite.
“It also reflects pay awards given by other companies in the UK and will ensure that rewards for Mixed Fleet remain in line with those for cabin crew at our airline competitors.
Unite claimed the airline “can afford” to address low pay following BA parent company International Airlines Group announcing a rise in annual operating profits to more than €2.5 billion on Friday.
Unite national officer Oliver Richardson said: “We would urge British Airways to meet Unite at Acas to resolve this dispute, as it claims to want to, and enable us to cancel these further damaging strike days.”