3) How do I check in online if I'm not flying with TUI?

To check in online, you'll need to go to the airline's website - a list of airline websites is in the attachment below. 
Make sure you use the airline's booking reference to log in to their website, and not your TUI booking reference - You'll be able to find the name of the airline you're travelling with, the airline's booking reference, and the airline's website address on your Manage my Booking page, just below your flight details.

If you're flying with TUI  or one of our chartered airlines*, please see our 'How do I check in online' FAQ. 
*Our chartered airlines are Air Europa, Albastar, ASL Airlines France, ASL Airlines Ireland, Evelop Airlines, Germania, Norwegian, Travel Service, TUI operated by Norwegian, and Volotea.

Please click here to access the Third Party Airline Weblinks