RYANAIR could replace planes with buses as the airline tries to limit the “£1billion compensation bill” for its cancelled flights shambles.
The company yesterday agreed to pay passengers affected for alternative flights, along with hotels and other expenses.
Travellers who want a refund have been told they will be first moved to the next available Ryanair flight on the same route or from/to a suitable alternative airport.
If this fails, then they will offer to fly the customer on Easyjet, Jet2, Vueling, Cityjet, Aer Lingus, Norwegian or Eurowings airlines.
But if there are no seats available with their rivals either, the airline said it could to put passengers on "any comparable alternative transport".
This could include hire cars, trains or even buses – with the cost assessed on a case by case basis.
Ryanair has also agreed to pay passengers "reasonable out-of-pocket expenses," if they fill out an EU261 expense claim and provide receipts.
But some passengers who had already accepted refunds before yesterday’s announcement have reportedly complained of being locked out of the improved compensation offer.
Vasileios Ntontis told the Observer he accepted the offer of his money back before receiving an email saying the firm would cover the cost of a flight with another carrier.
He said: “But when I contacted them through their chat service they told me that I was not eligible as I had already opted for a refund.”
“When I said that they had not given me that option in the first place, they weren’t very cooperative and tried to avoid any further conversation.”
The airline promised to look into any issue where a customer believes they were misled into cancelling their flights.
The company said: "If any Ryanair customer on one of these disrupted flights believes that they may have chosen an option that was not suitable for them as a result of any misunderstanding of their EU261 rights, then they should write directly to Ryanair’s Director of Customer Services.
"Ryanair will assist them in any way it can to obtain their full EU261 rights and entitlements."
The airline made the statement after meeting with Ireland's Commission for Aviation Regulation.
The UK's Civil Aviation Authority has accused the Dublin-based carrier of "not complying with the law" over its handling of the fiasco.
Ryanair has pledged to send a "clarification email" to customers outlining their rights and explaining how and when they will booked onto other flights.
CAA guidelines state that if an airline cancels a flight it must offer passengers an alternative flight under European Union law.