The low-cost airline’s chief marketing officer Kenny Jacobs said airlines needed to know if there would be a new agreement on open skies, which is governed by the European Court of Justice.
He then gave a pessimistic forecast on Brexit with the UK heading towards a “very ugly divorce”.
Speaking on Radio 4’s Today programme, he said: “Britain is going to leave open skies as it now stands, we need to see clarity interns of what is going to be the future of open skies, which will mean either a bilateral or not.
Kenny Jacobs called for "clarity" on Brexit or risk jeopardising flights into Europe
I think It’s clear we’re heading to what looks to be a very ugly divorce at the moment
“If there isn’t a new bilateral in place, you may have very restrictive or no flying between Europe and the UK for a period.
“And I think It’s clear we’re heading to what looks to be a very ugly divorce at the moment.”
He then called on the British government to give clarity with much of his airline’s custom coming from the UK.
Brexit Negotiations: Britain's sternest enemies Tue, April 4, 2017
According to a new index, the EU27 countries fall into three groups: hard-core, hard and soft. These are the countries with the highest scores which indicate a fairly strong opposition to Britain’s position
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France has the highest score in the index at 32.5
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Kenny Jacobs said a "messy" Brexit could lead to Ryanair halting flights in the UK
He said: “Our call on the government here is to please give us and other airlines clarity. Every airline is saying the same.
“We want to continue doing what we do. Three-quarters of British citizens go to Europe on their holidays, 80 per cent of British business travel is to the continent of Europe, so we need clarity.”
When asked if a “messy” Brexit could lead to Ryanair being excluded from the UK altogether, Mr Jacobs admitted it was a “very small possibility”.
He added: “That’s one that we’re keen to avoid. The UK has been the leading market across all of Europe in terms of low-cost airlines, we have 40 million passengers here in the UK.
“But yes, it’s a possibility that there may be major disruption for us and other airlines unless open skies is sorted out.”