Use comparison sites such as Cheapflights and Skyscanner to check the options available. These sites gather information from a range of airlines and ticket brokers; use at least two of these sites so that you have information on all available flights.
Be flexible with the date and time of your trip, if possible. You will find a greater choice of flights at a cheaper price if you are willing to travel midweek or outside of peak travel times. Also consider flying to cities within a few hundred miles of your actual destination and finishing your journey by car.
Search the websites of as many airlines as possible. Carriers such as American Airlines, JetBlue Airways and Southwest Airlines run daily flights on various domestic routes, and their websites give full details of all available flights.
Find the best time to book a flight by using the Bing travel website, which gathers information on airfares daily and then predicts the best time to book a seat on a particular route. It may advise you to either book immediately or wait for a time that's closer to your departure date.
Look for flights on LastMinute.com, which provides details of unsold seats on flights just prior to departure date, if you are traveling at short notice. You may pick up a good deal.
