If you don't mind putting in a little more work, visit the cheapest airline's website after you've compared it with others on an aggregator site. Some airlines will offer special deals and discounts if you buy tickets directly from the site. Popular flight aggregator sites include Priceline, Travelocity, and Expedia.Which airline has the cheapest flights?
Spirit Airlines wins for cheapest fares. Over 70 percent of the time, budget Spirit Airlines has the best rate for its routes.What is the best way to search for cheap flights?
One of the best ways to find a cheap flight is to search online airfare websites. As Nielsen Online International President John Carlson states, "Travel is a category extremely suited to the Internet due to the latter’s ability to provide efficient access to an extremely wide range of comparable information."...When are airlines tickets cheapest?
Tuesdays, Wednesdays and Saturdays are typically the cheapest days to fly; late-night flights ('red-eyes'), very early morning flights and flights with at least one stop tend to be discounted as well.