KAYAK searches hundreds of other travel sites at once to find the information you need to make the right decisions on flights, hotels & rental cars. KAYAK routes all privacy requests (access, deletion, correction, opt-out) through its online feedback form, and California residents can also use the "Do Not Sell or Share My Info" link on the site. Include the email address tied to your KAYAK account; the policy says KAYAK may need to verify your identity (e.g., signing in or security questions). KAYAK's own request report lists average response times of about 14 business days for access requests and ~2 for deletion/opt-out. Separately, you can stop marketing sharing with Booking Holdings group companies and travel partners in your KAYAK account preferences, and unsubscribe from marketing email via the link in those emails.