The airline said the council, which is led by Baroness Vere, has proved over the last six months to be a "talking shop" which delivers "no benefits, no reform and no change" for UK aviation or UK passengers.
Ryanair said the council held its first meeting in February 2023, its second in April – which was postponed by Baroness Vere at short notice – and the third on Tuesday (11 July).
In February, Ryanair called on Baroness Vere to implement five measures to improve UK aviation, including the improvement of NATS staffing to reduce ATC delays; the UK government to push for effective air space reform in Europe; improvement of Border Control staffing and processing times; a reduction in UK visa costs; and the restoration of temporary IDs at UK airports.
The airline claimed Baroness Vere and the UK Aviation Council has delivered "no action whatsoever" over the past six months on any of these goals.
Ryanair chief executive Michael O’Leary said: "We joined the UK Aviation Council in February when transport minister Mark Harper assured us it would be used as a ’delivery body’ to improve the resilience of UK aviation.
"Sadly, this has proved to be an empty promise. There has been no action, no delivery, and no improvement in UK aviation, and the Council has become a talking shop for Baroness Vere, government bureaucrats and the CAA to waffle on about reform while delivering none."
He continued: "If Baroness Vere wants to deliver change or improve UK aviation, then she should disband this useless council and work instead with the UK’s major airlines to deliver real and effective change.
"Instead, Baroness Vere prefers to waste her time, and ours, holding a quarterly talking shop, at which she promises action, but delivers none.
"Ryanair has better things to do with our time than waste it on her useless and ineffective Aviation Council, and so we have written today to Baroness Vere to resign from this council with immediate effect."
