Some passengers said they learned of the cancellation after they had checked in
Passengers were left stranded after Norwegian Air cancelled their Belfast to Providence flight due to staff sickness.
The US-bound flight had been due to leave Belfast International Airport on Saturday when the airline was forced to cancel the flight.
The service has been only been running since the beginning of July.
Some passengers said they learned of the cancellation after they had checked in.
Patrick Murphy, from North Belfast, told the BBC: “Our cases were checked in and we got texts from the airline to say it was cancelled.
“Desk staff knew nothing about it and said it must be an administrative error.
“We’ve been told some of us may be transferred to the flight to Newark.
“When asked how will you decide who goes we were told to form a line.”
A spokeswoman for Norwegian said: “We are extremely sorry that due to staff sickness, the planned flight from Belfast to Providence on Saturday 8th July has been cancelled.
“Arrangements are now being made to rebook passengers on flights from Belfast to the US later this evening and from Dublin to Providence tomorrow, together with additional transport and hotel accommodation as required.
“Any passengers no longer wishing to travel will be given a full refund. We would like to sincerely apologise again to passengers for the inconvenience caused.”