go on to
www.landings.com and look for the Great Circle prog, or look for the Flight Planning program. specify show route, and the airport icao codes.....but to answer your question just south of greeland usually....Bumz
Just ran route, and it is about 300mn south of Greenland by Great Circle....
But this is the full link...EGCC and KJFK being the required inputs...
http://www.landings.com/evird.acgi$pass*70210478!_h-www.landings.com/_landings/pages/search/search_dist_apt.html