17) What time do I need to drop off my luggage for my TUI flight?

To check if day before luggage drop is available for your flight please see the question "Can I drop off my luggage the day before I fly"

UK Airports
At UK airports, Bag Drop desks open two to three hours before your departure time. If you're taking a long haul flight, we recommend you drop off your bags three hours before your flight leaves.
Only one person from your party is required to drop off the bags, provided all passengers are travelling on the same booking reference. Just one of you needs to bring all printed boarding passes, passports and luggage to the Bag Drop desk, and then you can all go straight to the departure gates together with your tickets and boarding passes.
Resort Airports
Check-in desks at resort airports usually open two hours before departure.
Bag drop desk closing times
At both UK airports and resort airports, desks usually close 45 minutes before departure, so make sure you've checked in at least an hour before you're due to fly.
Checking in with other airlines
Recommended check-in times vary depending on which airline you're travelling with, so make sure you check your tickets/confirmation email for details on when you need to check-in and arrive at the boarding gate.