The move, which takes â€˜no frills travelâ€™ to a whole new level, could see 200 passengers vying to share one facility â€“ forcing them either to wait in very long queues or cross their legs and pray.
Ryanair chief executive Michael Oâ€™Leary said he wants to replace the toilets with extra passenger seats in order to offer cheaper air fares.
He is pressing Boeing to â€˜re-certifyâ€™ Ryanairâ€™s aircraft to enable six extra seats to be installed, particularly for short-haul flights.
The airline flies only one type of aircraft type, the Boeing 737-800. It has 189 seats on each plane, the maximum allowed under current rules.