Good luck flying KLM AMS > BKK, this flight is as close as you will get to a Ryanair long haul flight. The service is non existant, comfort is even worse. Why not try China Airline in BIz class on a D class fare from AMS with great times and service, or EVA. You can email me and I will put you in touch with a very good travel agent in AMS who can arrange these for you, he is the biggest agent for EVA in NL.