The low-cost long-haul carrier revealed its full winter schedule on Monday (July 16).
Flights will commence October 31, pending delivery of its full Airbus A321neo fleet, which has been blighted by delays.
Besides New York, Primera will launch a new four-times weekly Washington DC route on August 22 and continue its three-times weekly Toronto service.
Its seasonal Stansted-Boston route will return in early 2019.
Anastasija Visnakova, Primera chief commercial officer, said: “The demand we’ve seen so far shows there is a lot of interest in the catchment area of Stansted.
“There is clearly a huge amount of appetite for low-fare transatlantic flights and we’ve seen more than 70,000 passengers booking flights on our new transatlantic routes.
“This gives us great encouragement to build on the existing routes throughout winter and continue to run a daily operation between London Stansted and New York.”
Mark Souter, Stansted head of aviation, added: “We’re delighted Primera Air is continuing its popular daily service to New York over the winter period, as well as the existing Stansted-Toronto route.
“We have seen strong demand from customers on the New York route since its introduction earlier this year and we look forward to continuing to welcome Primera passengers at London Stansted.”
Primera’s transatlantic programme has been beset from the outset by delays to its fleet of Airbus A321neo aircraft.
The airline was forced to launch its Stansted-New York service in April with replacement Boeing 757 aircraft, chartered from National Airlines, following late delivery of its own Airbus.
In May, it postponed its inaugural Stansted-Toronto flights due to further Airbus delays, and chartered an aircraft for the launch of its proposed transatlantic routes from Birmingham.
However, yet further delays to its A321neo aircraft in June forced Primera to postpone its Birmingham transatlantic programme entirely until 2019.
Primera’s winter 2018/19 schedule will fly October 31 to March 31.
Its daily New York flights lead in from £149 one way, Washington £199 flying Mondays, Wednesdays, Fridays and Saturdays, and Toronto £149 flying Tuesdays, Thursdays and Sundays.