Everyone's always asking us to "hook them up" with free travel, so we decided to give away free airfare vouchers each week for the next five weeks. Starting this week, some lucky person and three of their friends will win four airfare vouchers at kayak.com/flyfree.

Tomorrow, our site will look a bit different. We thought we'd say a few words about it.

New ‘Explore’ Service Allows Travelers To Search For Deals On an Interactive Map

KAYAK today announced the acquisition of Munich-based swoodoo (swoodoo.com), Germany’s leading flight and hotel search site.

Taking an iPhone app, and turning it into a useful iPad is, or can be, a pretty big undertaking.