How long do I have to use my combination ticket? The 2nd attraction ticket is valid for 12 months so you don't have to visit both attractions on the same day! Related articles What is a combination ticket? Do I have to visit both attractions in one day? Why do I need to book a time slot with my combination ticket? When is SEA LIFE Manchester open? How do I redeem a 2 for 1 voucher at SEA Life Centre Manchester?