More than 100,000 passengers, Ryanair could be in line for compensation after their flights were cancelled due to strikes.
The Civil Aviation Authority (CAA) has urged Ryanair customers to claim under European flight rules.
At the beginning of this month, the airline cancelled 30 flights between Ireland and the UNITED kingdom, because of a 24-hour strike.
Pilots in Dublin are to go on strike Tuesday, while the cabin crew in Europe, with the strike of Wednesday and Thursday.
This week’s industrial action is to hit more than 50,000 customers.
Ryanair: What should I do if my flight is cancelled?
In a statement, the CAA said passengers can claim compensation under the European air passenger rights regulations.
Known as EU261, compensation is set at €250 (about £223) for flights up to 1,500 km and €400(approx. £357) for the longer routes in Europe and North Africa.
However, if a flight is cancelled due to extraordinary circumstances, passengers are not necessarily entitled to compensation under the EU regulation.
Ryanair and other airlines keep hitting to qualify as “exceptional circumstances” and therefore are exempt from the EU compensation rules.
The airline has confirmed that it would dismiss the claims and told the BBC;
“In the EU 261 legislation, no compensation is due when the union acts in a way unwarranted, and totally beyond the company’s control.”
A spokesman for the CAA said: “When a flight cancellation is caused by the action of the strike by the airline employees, the airline is required to pay compensation to passengers in the matter of the cancellation of the flight, if he has not notified the passengers of the flight cancellation at least two weeks before the scheduled time of departure.”