Airfare tracking service Yapta said today it is partnering with travel search site Kayak to power its flight search engine.

"By introducing Kayak's best-in-class flight search engine, Yapta members now have greater access to flight data and are able to track prices for virtually any flight in the world," said Tom Romary, president and CEO of Yapta.

"Tracking airfare prices prior to purchase will help travelers save money 45 percent of the time. And those travelers that continue to track the price of their flight after purchase will find that they're eligible for an airline refund about 15 percent of the time. By combining Yapta's price tracking capability with Kayak's flight search, we're looking to help even more travelers save on their airfare -- before and after they book."

Kayak said it plans to eventually pair Yapta's airfare tracking service with the search results on some of its websites.

Yapta said it has tracked pricing on more than 3 million flights and has provided more than $300 million in savings for its members.