Flights from Dublin to Kerry, Donegal, Edinburgh, Glasgow, Manchester and Newquay have been cancelled, as well as routes from Belfast to Edinburgh, Exeter, East Midlands, Leeds, Birmingham and Manchester.
Aer Lingus confirmed it had been notified of Stobart’s plans to call in a liquidator late on Friday evening (11 June).
"As a result, all Aer Lingus Regional flights operated by Stobart Air are cancelled," said the carrier.
According to Aer Lingus, Stobart Air cited the ongoing impact of the coronavirus pandemic for its troubles, resulting in "almost no flying" since March 2020.