Availability Oct-Dec.
Check Google Flights.
https://www.google.com/flights/#search;f=JFK,EWR,LGA;t=MAD,XOC,XTI;d=2016-10-06;r=2016-10-09HT:FT
Gotta play with the dates on GF. At first only thurs-sat was open, now I see everyday available! It seems that Sat.stay required.
Edit: Nyc-London $197 RT!
Travel dates:
March 2016 – January 2017
Routing:
New York – Bilbao – New York
New York – Seville – New York
New York – Nice – New York
New York – London – New York
New York – Oslo – New York
New York – Nice – New York
New York – Paris – New York
New York – Lisbon – New York
New York – Barcelona – New York
New York – Rome – New York
New York – Milan – New York
New York – Amsterdam – New York
New York – Prague – New York
New York – Malaga – New York
New York – Bologna – New York
New York – Brussels – New York
