CIE Tours guided coach vacations are recommended for ages 8 and older. Those aged 8 to 17 are charged 90% of the full adult rate and must travel with an adult. Unaccompanied travelers must be at least 18 years of age. For Walking & Hiking tours, the minimum age is 16, and all travelers pay the full adult rate. Children of any age are permitted on custom groups, private driver tours or self-drive vacations.