Ryanair has threatened to ground its flights after the UK withdraws from the European Union in a bid to persuade voters to "rethink" Brexit.
The Dublin-based carrier's chief executive Michael O'Leary said he wants to "create an opportunity" by making people realise they are "no longer going to have cheap holidays".
He adressed an audience of airline leaders in Brussels saying "I think it's in our interests - not for a long period of time - that the aircraft are grounded.
"It's only when you get to that stage where you're going to persuade the average British voter that you were lied to in the entire Brexit debate.
"You were promised you could leave the EU and everything would stay the same. The reality is you can leave the EU, yes that's your choice, but everything will fundamentally change."
The Ryanair boss warned that there would be a "real crisis" as flights between the UK and the EU are disrupted after Brexit.
He said: "When you begin to realise that you're no longer going to have cheap holidays in Portugal or Spain or Italy, you've got to drive to Scotland or get a ferry to Ireland as your only holiday options, maybe we'll begin to rethink the whole Brexit debate. "They were misled and I think we have to create an opportunity."
EasyJet chief executive Johan Lundgren, who was on stage alongside Mr O'Leary, interrupted him to say: "If you start grounding your planes, I'm flying."
Carsten Spohr, the boss of German carrier Lufthansa, added: "In theory, if we could use this industry to prove to the British how wrong the decision was, that might be a good thing."