When booking flights, choose the least popular travel times to save money on airfare, and consider flying mid-week or on a Saturday. For holiday travel, extend your trip or fly on the holiday itself to find a cheaper airfare. The added bonus will be shorter lines at the airport. As long as you are truly flexible with travel dates, compare as many dates as possible for your departure and return dates to find the best combination, and while doing these various dates searches, don’t forget to look at several options of departure and return times as well.
If you take multiple flights per year, you’ll likely also benefit from joining a rewards or loyalty program with the airline of your choice. It is free to join, and you earn points for each flight you take. Earn enough points and get free flights or upgrades. Online travel agent websites such as Orbitz even have rewards programs of their own, separate from airline programs.