First of all, plan ahead. A few months of advance can make a big differwnt in pricing. You might catch a last-minute cheap flight here and there but as a general rule of thumb early booking of flight tickets, give you a better chance of paying less. Reason? The owners of the popular airlines are aware of the fact that when your mind's made up about the date of flight, you don't have much choice but to buy the seat on a plane, no matter the price. If you haven't had an opportunity to look four your flight earlier, try using a search engine with funcionalities allowing to separate the outcomes into price ranges, 'deals' etc. or seats availability.