I was directed to an airline website from kayak to purchase a flight package. I submitted my ticket purchase on the airline website and a phishing note came up from the bank that issued my card requesting security info on my credit card. It is made to look like you have to fill out the form to complete the transaction so I did (stupid me) and the total came up as the original price listed on kayak without the additional charges I incurred for my tickets so I knew I had been phished. Kayak opens a new tab when they send you to the airline site. I would close down the kayak tab at that point or better yet, not use kayak.