The new early-morning service will depart Dublin at 8.10am and land in the US at 10.30am local time.
The new service will increase the route capacity by 66,000 seats.
Norwegian will also announce plans to double the frequency of its Shannon to Boston-Providence service, from two to four flights a week, and add a third weekly flight to Stewart, from March 27.
The airline introduced the new Boeing 737 MAX 189-seat aircraft on the Boston route late last year.
Norwegian’s Chief Commercial Officer, Thomas Ramdahl, said more than 130,000 passengers have flown Norwegian between Ireland and the US since flights started last July.
Norwegian began flying between Belfast and New York Stewart Airport and Belfast to Providence, Rhode Island. Currently the Providence service is suspended for the winter season.
