How much are tickets to SEA LIFE London? Online tickets are priced from £20.40. On the day pricing are £26.00 for an adult and £21.00 for a child. For full information on prices please visit our website here. Related articles Do Under 3's need a ticket? Do you offer any concessionary rates? How can I buy tickets for SEA LIFE London? Can we save by booking online? How does a Merlin's Magical London Pass work?