TRAVEL TIP: It happens all of the time. You find a cheap flight online, search for it again later that day … and the price has skyrocketed. Why? All booking sites record your web browsing data and some (e.g. Travelocity) use this information to raise prices when you’re interested in a flight. If you clear your web browsing data (known as a cache), there’s a chance that you’ll find the original price.