There are dozens of great airfare booking sites out there.
But just a few of them specialize on last minute travel.
Hopper is a website, and now, an app, that gives users fair predictions, so you know went to buy.
It will also provide tips as to what you can tweak in your itinerary, like time of day, route, and airport, in order to save money.
The most useful feature of Airfare Watchdog is being able to tap into promo codes.
The people who run the site mine specific carriers promotional fares in order to pass along the savings to their users.
WhichBudget.com is another flight aggregating site that includes airlines of all sizes.
Your searches are not just limited to big global carriers, which can save you cash as Ashley on international flights.
And finally, there's yapta.
It, too, is a website for finding cheap airfare, but its most stand-out feature is a tool that helps you get a refund if you've already purchased airfare and it's dropped in price.
Enter your flight information and receive alerts, see if you can claim your refund from your carrier.
In San Francisco, I'm Caria Saboy, cnet dot com, for CBS news.