These flights you can book over Norwegian web page to New York flying from Oslo Gardermoen airport.
Departure: 01.03., 08.02.;
Return: 12.02., 13.02., 12.03.;
There are many dates options in January and February for little bit expensive as well (like, 259 EUR roundtrip etc.)
There are some great accommodation options listed on booking.com or if you are interested in booking apartment or room then visit airbnb.com (here you will get € 20 bonus credit for accommodation after registration).
These flights are bookable via Norwegian.
As the number of tickets for this price is limited, then do not wait long and book now!
Have a look at Trip Advisor when planning your holiday to find out whats hot and whats not when it comes to all the local attractions.
To know more about New York, you can visit and read more in Wikitravel here
To check more details about flights, look screenshot: