At www.TUIfly.com, once you have signed in on the “My account” tab, you can update your personal details at any time under menu item “Change my data”. If your name has to be changed (e.g. because of marriage), you need to call our Servicecenter 0049 (0) 1805 / 45 22 45, Mondays - Fridays: 08.00-20.00; Saturdays - Sundays: 10.00-19.00.