Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Koh Samui to Yangon as you normally would.
Related info for your journey
Useful info, stats and facts about Koh Samui to Yangon flights.
USM stands for Ko Samui Airport, while RGN stands for Yangon Mingaladon Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.