Since then, Ryanair has begun to recognise trade unions on a country-by-country basis, and its Irish union is now threatening to ballot pilots over working practices. "And at group structure, again, model on the IAG structure would enable us to build some scale to participate in those kind of processes".
Europe's largest low-priced airline said that profits could fall by as much as 14 percent in its financial year through March 2019. While the prospect of 380,000 dwellings coming up for sale might be music to some ears, they pointed out that it would also mean a big reduction in available private rentals. If there are (strikes), we will take them as we have in Germany and Portugal.
Ryanair's statement said it expected the market for experienced pilots in Europe to remain tight, putting further upward pressure on staff costs.
Earlier this year it surprised aviation observers by buying a chunk of Austria-based airline LaudaMotion - and the Irish company is now sniffing around for more acquisitions.
In the past 12 months, three smaller European airlines have folded.
Mr O'Leary said that Ryanair planned to restrict non-EU shareholders' voting rights in order to prepare the airline for a hard Brexit in March 2019.
Ryanair also recently announced it is acquiring 24.9% of Austrian carrier LaudaMotion, with plans to increase this to 75% subject to regulatory approval.
Staff costs will rise by nearly 200 million euros (£174 million).
Although the airline has bought ahead 90% of its expected fuel needs for the current year, at $59 a barrel, the increase in oil prices is expected to add more than €400m to the airline's fuel bill.
He added: "Forward bookings are strong but pricing remains soft.
Air fares tend to follow oil prices (as they have downwards over the last 3 years) but with a lag of up to 12 months before higher oil prices feed through to higher air fares", said Ryanair. Ryanair is anticipating fares will drop by 5% in the first quarter, before improving 4% in the second quarter.
"The thinking is Ryanair Holdings will evolve probably into a holding company not dissimilar to IAG over the next two to three years, O'Leary said on an earnings call with analysts after the release of the company's full-year results on Monday".