From BBC News:
Aer Lingus is stopping flights from George Best Belfast City Airport to several UK destinations.
It comes after Stobart Air, which operates Aer Lingus' regional services, including those from Belfast, failed to find a buyer and is being liquidated.
Flights to Leeds Bradford, Edinburgh, Exeter, Manchester, East Midlands and Birmingham have been cancelled.
Stobart Air also operated a number of routes within the Republic of Ireland for Aer Lingus and those routes have all been cancelled.
Aer Lingus was due to replace Stobart Air with a new regional operator next year but it is not clear how quickly it could now start to operate the services.
Emerald Airlines was being lined up to take over the contract.
Stobart Air staff received an email from the company's managing director on Friday night informing them of the situation.
It outlined that Ettyl Limited, a company based in the Isle of Man, had agreed terms with Esken, the owners of Stobart Air, to buy the company.
However, according to the email, Esken discovered on Thursday evening Ettyl Limited was unable to acquire the company "on the original terms" or "obtain an alternative funding package within the required timescale".
The email stated that Stobart Air was now in the process of appointing a liquidator.
