Here are a few of the most interesting Kayak statistics and facts I was able to dig up including user counts. As always, be sure to check back in the future as I will be updating this post as new and updated stats become available.
What is Kayak?
KAYAK is a travel search engine that searches hundreds of sites at once for flights, hotels, rental cars and vacation packages. (source)
Kayak User Count
Number of consumer queries each year:
Last updated 11/5/18