On KAYAK you can create one by signing in and going directly to Price Alerts in your account or you can look for the "Track Prices" button on the top left-hand side of flight results. If you're searching hotels, select "Set Price Alert" at the top right of the hotel results list. If you're on our app, you can get to Price Alerts using the app's navigation menu and follow instructions there.
KAYAK processes over 2 billion flight queries annually and displays results from hundreds of airlines and third party sites, allowing it to find a variety of flight prices and options. It also displays results from 2M+ properties along with rental cars, vacation packages, activities and millions of verified reviews so users can see as many available travel options as possible.