Priceline will buy meta-search engine Kayak.com for $1.8 billion. Readers of Loyalty Traveler may know I am a frequent user of kayak.com. Both sites rank in the Top 10 travel sites in the USA.
Priceline makes most of its money from hotel bookings. Kayak makes 80% of its revenue from flight search referrals according to the Financial Times.
It should be interesting to see how the Priceline/Kayak partnership takes on the Expedia online travel network.
Then there is Google who owns itasoftware.com.
The online travel market is consolidating into technology empires.
TopTenReviews has an informative article 2013 Online Travel Sites Comparison with reviews of leading online travel sites and a highly detailed chart of their features.