I am looking for a cheap ticket from a New York area airport (Newark, JFK, LGA) to London (Heathrow, Gatwick). The cheapest I have come up with is $400 (using hotwire, expedia, orbitz, travelocity). I know I have seen lower advertised prices in the past. I am looking to travel from Sep. 12 to Sep. 23. Anyone know where I can look for a cheaper flight? I know I can try priceline, but I want to explore other options first. Thanks.