De acordo com o site do aeroporto de Bangkok :
Suvarnabhumi International Airport Departure Tax (Bangkok International Airport Departure Tax) = 700 Baht
MAS, note que também diz:
Since February 1, 2007 the 700 Baht international departure tax was included in the price of flight tickets.
(The international departure tax is usually included in the cost of your ticket. However, some travel agency may exclude the tax from their published rate, so please review the terms & conditions of the ticket price carefully every time before making a purchase . )