The extra daily frequency will add up to 392 premium seats and 1,974 economy seats a week to the destination.
Prices start from £155 one way in economy and £455 one way in premium and are available to book now.
Thomas Ramdahl, chief commercial officer at Norwegian, said: “New York remains one of the most popular routes for Norwegian customers and we are delighted to be able to offer an additional frequency between London Gatwick and JFK Airport which will provide even further choice and flexibility combined with great value.”
Flight DI7017 departs Gatwick at 09.50 and lands at JFK at 13.00. Flight DI7018 departs JFK at 19.40 and lands at Gatwick at 07.10 the following day.
