United Airlines said in a statement:
"We have regretfully taken this decision because of the route's poor financial performance. We will contact customers with bookings for flights beyond those dates to provide refunds and re-accommodate where possible. We apologize for any inconvenience caused."
Doubtless contributing to United's decision to end this service is the European Commission's decision that a 9M GBP subsidy offered to United by the government of Northern Ireland would create an "undue advantage" for the airline.
Too bad. This is a serious blow to NI tourism.