Here is a review of Top 15 travel websites by the site eBizMBA.com.
The top 15 travel sites have been ranked as per the estimated unique monthly visitors. The sites ranks as per quintcast and Alexa have been gien too. The top travel sites on the internet are
Tripadvisor
Yahoo Travel
Expedia
Travelocity
Priceline
Orbitz
Kayak
Hotels
Travelzoo
Hotwire
Booking
Cheaptickets
Lonely Planet
Virtual Tourist
Sidestep
Ref: - http://www.ebizmba.com/articles/travel-websites