Aer Lingus returned to a full service on Wednesday, a week after the suspension of the industrial action called by its pilots over a pay dispute.
The work-to-rule action, which began on June 26, saw the cancellation of 610 flights impacting over 80,000 passengers.
Due to the strike, Aer Lingus had cancelled flights up until yesterday, which it said could not be reversed.
The strike was called off after the Irish Pilot Association (IALPA), which represents hundreds of pilots at the airline, recommended acceptance of the Labour Court proposal aimed at breaking the deadlock.
The court had recommended a 17.75 per cent pay increase for pilots over a four-year period.