Ryanair said Friday it planned to cut between 40 and 50 flights per day over the next six weeks to "improve punctuality".
"Cancellation notices for flights cancelled up to and including Wednesday 20 Sept have been sent to affected customers and we will continue to send regular updates".
In the first two weeks of September, punctuality has fallen below 80%, which Ryanair blamed on a number of factors, including air traffic control delays and strikes and weather disruptions.
However, travellers who had booked flights with Ryanair were furious at being left without transport.
"Ryanair apologises sincerely for the inconvenience caused to customers by these cancellations". At least one person has said on social media that their flight next week has been cancelled, but is still showing as scheduled on the airline's website. "Most stressful days of our lives".
No Ryanair flights from Leeds Bradford appear to have been cancelled today, with departures to Venice, Dublin and Chania getting underway this morning.
Ryanair said it had operated at record schedule and traffic levels during July and August, but this had led to a "backlog of crew leave" as the airline's holiday year transitions from its current April start to a calendar year.
He apologised to the "small number" of customers affected by the cancellations, and said the airline would be doing its utmost to arrange alternative flights and/or full refunds for them.
In a statement, the airline said: "These tighter crewing numbers and the impact of ATC capacity restrictions in the UK, Germany and Spain, as well as French ATC strikes and adverse weather (thunderstorms) have given rise to significant delays in recent weeks".
The budget airline says the measure is created to improve punctuality, which has fallen below 80 per cent in the first two weeks of September.
Between 40 and 50 flights, less than 2 per cent of the 2,500 it operates daily, will be cancelled until the end of October.
- Europa League: Arsenal fight back to defeat Cologne
- Trump calls May after London terror attack; pledges support
- Star Wars 8 leaks: Rey's Force connection revealed? It's a 'SHOCKING twist'
- VEVO Documents Hacked, Posted Online
- Kim Jong-un Vows To Finish Nuclear Program
- Virat Kohli backs Ajinkya Rahane to open batting
- Mike Brown Sr. speaks out following Stockley verdict
- Nike unveils Cleveland Cavaliers' new "Statement Edition" uniforms
- Hurricane Irma : At least nine dead on St. Martin Island
- Dreamers are Americans, just like the rest of us