I am trying to get the cheapest possible flight to NY around the holiday season, dates flexible. I have been trying the app "hitlist" but without much success. I also did the rounds on Kayak, Expedia, TripAdvisor etc. I just feel like there is a better deal out there. I mean, I am going between two major US cities so these routes should have deals on them and I am willing to travel on major holidays. Does anyone have a cheap flight website or app they recommend for when dates are flexible? Like one that shows the best option for both out and return flights taking advantage of every possible discount and sale?