
The airline's boss, Michael O'Leary, has said that the scheme would be in place within two years.
However, he denied that Ryanair was trying to profit from customers needing a toilet break. The plan aims to discourage passengers from using the toilets onboard, which could then be replaced with additional seating on the aircraft; losing two toilets can create six extra seats.
Ryanair reported its first loss for 20 years yesterday, with profit down £145m for the year to the end of March. However, its passenger numbers continue to rise - up 15% to 58.5m last year.