Ryanair is currently in talks with AlItalia about providing feeder flights to its long-haul hubs in a deal that could help the Italian flag carrier curb losses on short-haul flights.
Ryanair, which exclusively operates short-haul point-to-point services, is hoping to pilot a system of feeding long-haul flights in the coming months.
O'Leary said he hoped such plans with Norwegian Air Shuttle (NWC.OL) and Aer Lingus (ICAG.L) could start in May. The integration of their booking systems has delayed the signing of deals, he said.
Ryanair is offering long-haul carriers the ability to book its seats for resale at the same prices offered to customers on its own website. The long-haul carriers would take full responsibility for missed connections, though Ryanair would pay fines under EU rules for flights over three hours late, he said.