It's an airfare search engine for cheap flights, showing hidden city ticketing trips in addition to what sites like Expedia, KAYAK, and Travelocity show.
Although it doesn't save you money for every single flight, it can save you 15%, 20%, 35%, and sometimes even save you more than half the regular fare - depending on where you're going.
How does it work?
A lot of the time, a trip to a 'connecting' city will be cheaper
than if that city was the final destination.
What I mean by that is this:
Let's say I wanted to fly from Seattle to Cincinnati, 1-way.
A ticket might cost around $215 (one-way).
Yet a ticket from Seattle to Nashville is only $160...
Why do I mention Nashville, when I really want to go to Cincinnati?
Because the trip to Nashville has a layover in Cincinnati.
You save $55 by just booking the trip to Nashville,
but not getting on that connecting flight when you're in Cincinnati.
Yes, you can do this - as long as you have no checked baggage
since any checked bags would go to the final destination, even if you get off at a connecting city.