Over the winter, Norwegian is offering round trip tickets for under US$ 300. The best way to search for these fares is to look at Google Flights. Sporadic dates available in February; more dates available for $304.


Google flights will link you over to Norwegian’s website to book. Norwegian is a low cost carrier and tacks on several fees, so be careful.

Link here: https://www.google.com/flights/#search;f=JFK,EWR,LGA;t=HEL;d=2017-02-27;r=2017-03-10;sel=JFKARN0DY7006-ARNHEL1DY4285,HELARN0DY4286-ARNJFK0DY7005