Wheres the cheapest site to get airline tickets?

There is no one cheapest website otherwise everyone would go to that website and the other websites would go out of business. You can check out a href="http://www.kayak.com" rel="nofollow"http://www.kayak.com/a or a href="http://www.expedia.com." rel="nofollow"http://www.expedia.com./a However many of the discount airlines such as JetBlue, Southwest, AirTran, Frontier, Sun Country, Allegiant, Spirit, Virgin America require that you buy your tickets from their website.