The Irish carrier said Impact union's strikes, expected next week, had caused "significant damage" to bookings over the crucial summer months.
The firm said yesterday that, providing there were no more strikes, 2014 operating profits were set to be 10 to 20 per cent lower than last year, or between €49m (£39.5m) and €55m.
"The outcome will depend in part on the speed with which we can win back customer confidence," it said.
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