The low-cost flights are available to book through 11:59 p.m. March 19. Available trips include flights from Boston and New York City to Dublin, Cork, Shannon and Belfast from April through June. There are also trips from New York to Dublin, Shannon and Belfast in August, September and October.
The prices are for Norwegian Air’s LowFare tickets, which do not include meals, checked baggage or seat reservations. The price also does not include taxes and fees. The tickets are non-refundable, but can be cancelled without an additional fee within four hours of booking or up to 2 hours if booked a week before departure.