Those affected by flights being cancelled or rescheduled this week are being reminded of their entitlements.
EU consumer protection law for air travel entitles passengers to a full refund of the cancelled flight, a rescheduled or alternative flight, as well as assistance and duty of care for delays.
The European Consumer Centre Ireland says those who have travel insurance should check their policy coverage before making the decision to not accept an offer from the airline.
A British air traffic control systems failure on Monday resulted in thousands of passengers across Europe facing delays and cancellations.