TUI flights Firstly, make sure that you've entered your email address in the lead customer email box at the top of the page. This is the address that we'll use to send confirmation of your selected seats, any extras you book and any special assistance you request. If you can't click on the Check-in button, it means that online check-in isn't open for your flight yet. Online check-in opens 72 hours before your outward flight departing the UK and 72 hours before your return flight. Please contact us if you're having difficulty in checking in online. This also applies if you're flying with the following airlines: - Air Europa (flight prefix AEA) - Albastar (flight prefix JQ) - ASL Airlines France (flight prefix FPO) - ASL Airlines Ireland (flight prefix ABR) - Evelop Airlines (flight prefix EVE) - Germania (flight prefix ST) - Norwegian (flight prefix D8) - Travel Service (flight prefix QS) - TUI operated by Norwegian (flight prefix BY) - Volotea (flight prefix VOE)