A one way fare, including taxes, from Belfast to New York starts at £120 (conditions apply).
The offer expires on Monday coming, March 19, at midnight and is valid for travel between April 15 and May 31, 2018, and Sept 5 and October 31, 2018.
Other sale fares include London to Chicago from £140, London-New York, JFK from £145, London-Boston £150, London-Oakland SanFrancisco £150, London-Fort Lauderdale Miami, £155 and London-Seattle £160.
Other sale routes include other non-stop destinations to north America, Buenos Aires and Singapore.
Bookings can be made on the Norwegian website.