Find a good deal on your flight from Belfast to Koh Samui with Netflights. If you want to keep your options open, take a look at flights from another airport in Belfast.
Both flight prices and accommodation rates fluctuate throughout the year, but searching by month will reveal the cheapest times to fly.
Or you could broaden your search by looking at flights to other airports in Thailand to see if there are any cheaper options.
You can also compare the prices of hotels and hire cars for your stay in Thailand. Simply use the tabs above, or add them to your booking once you’ve chosen your flight.