We've gone through lots of different flights, to help you find the cheapest way to get from London Gatwick to Koh Samui. You can choose from four airlines. At the moment, 02 / Nov / 2025 is the cheapest date to travel, but scroll through the results to find the option that works best for you.
There are 105 flights from London Gatwick to or via Koh Samui every week. Out of the four available airlines, the most popular ones are Emirates, Qatar Airways & British Airways. But that doesn’t necessarily mean they’ll be the best option for your travel dates. To see as many flights as possible, try widening your search to include other departure airports.
The distance between London Gatwick to Koh Samui is 9894 km. Normally, it takes about 18 hrs 50 mins to fly, and you can definitely expect the journey to be at least 15 hrs 35 mins. You can see the various flight times in the results.
November is normally the cheapest month to fly to Koh Samui, but it’s important to try different options when you search. Searching by month, for instance, will show you the best time of the week to fly. July is always the most expensive time to fly but, if you check regularly and book early, you have a better chance of getting a good deal.
