JetRadar compares airfares from Udon Thani to Koh Samui with hundreds of airlines (including Lufthansa, Qatar Airways, Malaysia Airlines) and dozens of online travel agencies in one single place. We provide you with all the options to find the cheapest flights to Koh Samui, you choose where to book. Also there you can find airlines special offers from Udon Thani to Koh Samui. The cheapest round-trip price found within the last week was €301. The cheapest oneway price found within the last week was €147.