Angry passengers face spending the weekend in Dublin after their Aer Lingus flight was cancelled on Saturday.
The Chicago-bound flight was forced to do a U-turn just south of Iceland yesterday afternoon when a medical emergency was declared on board.
Flight EI-123 was two hours into the flight when a decision was made to return to Dublin.
The diverted flight was then cancelled and passengers had to remain in Dublin until alternative arrangements were made for them.
Not all passengers were able to secure seats on flights departing on Sunday and some were informed that they would have to wait until Monday before they could fly out.
"They were putting people on Monday flights and some people waited three hours just to get booked into hotels. They were then told that they would need to return the following morning to re-book their flights," a passenger told Independent.ie.
"There were only three people at the counter helping the 200 people that were waiting in line," she added. "People took photos and a woman took a video to show how crazy the lines were after two hours of waiting but she was told that 'this is not America' and she was not allowed to film."
An Aer Lingus spokesperson said Saturday's flight was cancelled due to operational reasons arising from its diversion to base. Guests were accommodated into hotels and booked onto flights, where possible, on Sunday, April 30.
The airline explained that it took longer than usual to accommodate everyone due to the "lack of availability of seats on alternative routings during a busy Bank Holiday weekend".
The Bank Holiday weekend also meant that there was limited local accommodation available and this contributed to further delays.
"Aer Lingus ground operations staff worked throughout the evening to accommodate as many guests as possible with flight and hotel bookings and advised those who could find available hotel rooms, through their own means, that Aer Lingus would refund their accommodation costs.
"Some guests who had secured accommodation were advised to return to the airport on Sunday where they would be rebooked onto alternative flights. This was to allow the ground operations staff to focus on assisting those who still required overnight accommodation.
"Aer Lingus apologises sincerely for the inconvenience caused by this disruption in service."