Hundreds of passengers from a US-bound Aer Lingus flight spent last night in hotel accommodation, after their flight was forced to return to Dublin Airport yesterday evening.
A decision was made to turn the plane around more than two hours into the flight as seven of the eight cabin crew reported feeling unwell.
The crew did not declare an emergency.
Flight EI-139 left Dublin for Boston at 4.20pm yesterday afternoon with 280 passengers on board.
The aircraft landed safely at 8.40pm last night and was met at Dublin Airport by medical personnel.
An airline spokesperson told RTÉ News that none of the staff required hospital treatment.
They were sent home after the aircraft landed.
Aer Lingus has launched an investigation into the incident.
Passengers travelled on to Boston today after an additional flight was organised for this afternoon.
An Aer Lingus spokesman said a number of passengers were accommodated on earlier flights.