The bases have been shut as a result of covid disruptions.
Michael O'Leary is reassuring people that Ryanair bases at Shannon and Cork will reopen.
The bases were closed for winter, resulting in 135 people being laid off.
The airline has agreed to buy 75 Boeing 737 Max aircraft, but says any passengers with safety concerns can be moved to the next available flight on an older model.
Group CEO of Ryanair, Mullingar's Michael O'Leary says how soon Cork and Shannon reopen will depend on the government's response: