Ja'Vonne's Travel Minute - Who's Watching
When you visit a particular site, that site records your computers IP address and your search data is tracked just as your browser history is stored on your computer. That’s right booking sites record your computers web browsing data.
Some sites use this information to track your patterns, cities and dates searched and will raise prices when you’re interested in a particular flight or route.
To combat this, you should clear your web browsing history. Depending on your system it can be called cache or footprints. You’re then more likely to find that lower airfare again, unless of course, it’s just sold out.