Air travel between France and Dublin will be disrupted today because of a strike by French air traffic controllers.
Aer Lingus is cancelling just two flights on its Paris route, and says flights to other French cities are not affected.
However, Ryanair says it's been forced to cancel more than 20 flights to and from Irish airports.
The airline has had to cancel a total of 250 flights across Europe tomorrow due to the strike. A statement from the company went on to attack the striking workers, saying: “It’s grossly unfair that thousands of European travellers will once again have their travel plans disrupted by the selfish actions of a tiny number of French ATC workers.”
Ryanair is advising all passengers who have booked flights over French air space to check ryanair.com for updates.
Meanwhile in the UK, departure and arrivals boards at Heathrow suggested most European flights were either delayed or cancelled, affecting tens of thousands of passengers.
Easyjet has axed 118 flights. Most of these are within France, but some are to and from UK airports.
The airline said in a statement: "We can assure our passengers we are doing everything possible to limit the inconvenience of this strike on them."
British Airways said: "Unfortunately there will be some knock-on delays to other parts of our short-haul network as a result of the strike action, given how much airspace in Europe will be affected. We are sorry for any disruption to customers' travel plans."
The moves were a response to advice from the French aviation authority, the DGAC, which had urged companies to cut their flights to and from France by 40%.
Airlines have warned the action will have a knock-on effect for short and medium-haul flights across Europe, due to the large number of flights that normally use French airspace.
The strike has been called by France's largest Air Traffic Controllers union, the SNCTA, in a dispute over working conditions.
The union is planning further action on 16-18 April and 29 April to 2 May.
The SNCTA delayed a strike planned a strike for 25-27 March due to the Germanwings crash in the French Alps.
