The Dublin – Heathrow route, the second busiest air route in Europe, was severely impacted.

It comes after more than 1,000 flights to and from Heathrow were cancelled on Friday due to a power outage.

Some airlines are running additional flights from other London hubs, or using larger aircraft.

All flights to and from Dublin, Shannon, Cork and Knock airports to London Heathrow have been cancelled today

Michael O’Leary said the UK chancellor should scrap air passenger duty rather than ‘waffle on’ about Heathrow expansion

The route, operated by Loganair, is jointly funded by the UK Department for Transport and the Stormont Department for the Economy.