How much is the departure tax when leaving London?

Question

Im thinking about going to London for a couple days. Ive been looking around online but cant find how much the taxes are to leave.

I would be leaving London going back to the United States.

Answer 1

Do you mean APD (Airline Passenger Duty)
Short-haul flights leaving the UK £10 per economy class passenger.
On long-haul flights, £40 for economy class and £80 in business class.