646 € Cheap Flights from London Heathrow to Samui International

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Flight deals from London Heathrow to Samui International

Looking for a cheap last-minute deal or the best return flight from London Heathrow Airport to Samui International Airport? If you want to travel next month, return fares start from 767 €. Find the lowest prices on one-way and return tickets right here.

Koh Samui.646 € per passenger.Departing Sun, 25 Oct, returning Sun, 8 Nov.Return flight with Air China and Bangkok Airways.Outbound indirect flight with Air China, departs from London Heathrow on Sun, 25 Oct, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departs from Samui International on Sun, 8 Nov, arriving in London Heathrow.Price includes taxes and charges.From 646 €, select.

Koh Samui.733 € per passenger.Departing Thu, 5 Nov, returning Thu, 19 Nov.Return flight with Air China and Bangkok Airways.Outbound indirect flight with Air China, departs from London Heathrow on Thu, 5 Nov, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departs from Samui International on Thu, 19 Nov, arriving in London Heathrow.Price includes taxes and charges.From 733 €, select.

Koh Samui.739 € per passenger.Departing Tue, 29 Sep, returning Fri, 23 Oct.Return flight with Air China and Bangkok Airways.Outbound indirect flight with Air China, departs from London Heathrow on Tue, 29 Sep, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departs from Samui International on Fri, 23 Oct, arriving in London Heathrow.Price includes taxes and charges.From 739 €, select.

Koh Samui.743 € per passenger.Departing Sat, 12 Sep, returning Tue, 29 Sep.Return flight with Air China and Bangkok Airways.Outbound indirect flight with Air China, departs from London Heathrow on Sat, 12 Sep, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departs from Samui International on Tue, 29 Sep, arriving in London Heathrow.Price includes taxes and charges.From 743 €, select.

Koh Samui.763 € per passenger.Departing Mon, 9 Nov, returning Tue, 8 Dec.Return flight with Air China and Bangkok Airways.Outbound indirect flight with Air China, departs from London Heathrow on Mon, 9 Nov, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departs from Samui International on Tue, 8 Dec, arriving in London Heathrow.Price includes taxes and charges.From 763 €, select.

Koh Samui.767 € per passenger.Departing Thu, 1 Oct, returning Sat, 31 Oct.Return flight with China Eastern and Bangkok Airways.Outbound indirect flight with China Eastern, departs from London Heathrow on Thu, 1 Oct, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departs from Samui International on Sat, 31 Oct, arriving in London Heathrow.Price includes taxes and charges.From 767 €, select.

Koh Samui.783 € per passenger.Departing Sat, 31 Oct, returning Tue, 1 Dec.Return flight with China Southern and Bangkok Airways.Outbound indirect flight with China Southern, departs from London Heathrow on Sat, 31 Oct, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departs from Samui International on Tue, 1 Dec, arriving in London Heathrow.Price includes taxes and charges.From 783 €, select.

Koh Samui.788 € per passenger.Departing Mon, 7 Dec, returning Thu, 17 Dec.Return flight with Air China and Bangkok Airways.Outbound indirect flight with Air China, departs from London Heathrow on Mon, 7 Dec, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departs from Samui International on Thu, 17 Dec, arriving in London Heathrow.Price includes taxes and charges.From 788 €, select.

Koh Samui.800 € per passenger.Departing Tue, 6 Apr, returning Tue, 13 Apr.Return flight with Gulf Air and Bangkok Airways.Outbound indirect flight with Gulf Air, departs from London Heathrow on Tue, 6 Apr, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departs from Samui International on Tue, 13 Apr, arriving in London Heathrow.Price includes taxes and charges.From 800 €, select.

Koh Samui.814 € per passenger.Departing Tue, 23 Feb, returning Wed, 3 Mar.Return flight with Austrian Airlines.Outbound indirect flight with Austrian Airlines, departs from London Heathrow on Tue, 23 Feb, arriving in Samui International.Inbound indirect flight with Austrian Airlines, departs from Samui International on Wed, 3 Mar, arriving in London Heathrow.Price includes taxes and charges.From 814 €, select.

Koh Samui.821 € per passenger.Departing Tue, 29 Sep, returning Tue, 10 Nov.Return flight with Vueling Airlines and Bangkok Airways.Outbound indirect flight with Vueling Airlines, departs from London Heathrow on Tue, 29 Sep, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departs from Samui International on Tue, 10 Nov, arriving in London Heathrow.Price includes taxes and charges.From 821 €, select.

Koh Samui.830 € per passenger.Departing Tue, 27 Oct, returning Tue, 27 Apr.Return flight with Brussels Airlines and Bangkok Airways.Outbound indirect flight with Brussels Airlines, departs from London Heathrow on Tue, 27 Oct, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departs from Samui International on Tue, 27 Apr, arriving in London Heathrow.Price includes taxes and charges.From 830 €, select.

Koh Samui.841 € per passenger.Departing Mon, 8 Mar, returning Sun, 14 Mar.Return flight with Air India and Bangkok Airways.Outbound indirect flight with Air India, departs from London Heathrow on Mon, 8 Mar, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departs from Samui International on Sun, 14 Mar, arriving in London Heathrow.Price includes taxes and charges.From 841 €, select.

Koh Samui.846 € per passenger.Departing Wed, 28 Apr, returning Sun, 9 May.Return flight with Air India and Bangkok Airways.Outbound indirect flight with Air India, departs from London Heathrow on Wed, 28 Apr, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departs from Samui International on Sun, 9 May, arriving in London Heathrow.Price includes taxes and charges.From 846 €, select.

Koh Samui.874 € per passenger.Departing Thu, 15 Oct, returning Wed, 31 Mar.Return flight with Shenzhen Airlines and Bangkok Airways.Outbound indirect flight with Shenzhen Airlines, departs from London Heathrow on Thu, 15 Oct, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departs from Samui International on Wed, 31 Mar, arriving in London Heathrow.Price includes taxes and charges.From 874 €, select.

Koh Samui.875 € per passenger.Departing Tue, 12 Jan, returning Thu, 28 Jan.Return flight with Brussels Airlines and Scoot.Outbound indirect flight with Brussels Airlines, departs from London Heathrow on Tue, 12 Jan, arriving in Samui International.Inbound indirect flight with Scoot, departs from Samui International on Thu, 28 Jan, arriving in London Heathrow.Price includes taxes and charges.From 875 €, select.

Find the cheapest month to fly from London Heathrow to Samui International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like London Heathrow to Samui International flights are currently cheapest in November.

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London Heathrow to Samui International: Alternative routes

Compare routes from London Heathrow to Koh Samui below. You may find an airport to fly into that's cheaper, faster, or easier than Samui International.

Samui International

5km from central Koh Samui

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from 646 €

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London to Koh Samui: Flight information

The things to know before you go.

Cheapest flight found	646 €
Cheapest month to fly	October

Finding cheap flights from London Heathrow to Samui International: Frequently asked questions

How much are return flights from London Heathrow to Samui International?

The best price we found for a return flight from London Heathrow to Samui International is 646 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

Which airlines fly direct from London Heathrow to Samui International?

Currently, there are no airlines that fly direct from London Heathrow to Samui International. But we found flights with one or more stops from 646 €.

How many flights are there a week from London Heathrow to Samui International?

As of September 2026, there are no flights flying from London Heathrow to Samui International.

When is the cheapest time to fly from London Heathrow to Samui International?

The cheapest month to fly from London Heathrow to Samui International is usually October.

Which upcoming date is cheapest to fly from London Heathrow Airport to Samui International Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from London Heathrow Airport to Samui International Airport on Sunday, 25 October 2026.

Can I get a direct flight from London Heathrow Airport to Samui International Airport?

No airlines currently offer direct flights between London Heathrow Airport and Samui International Airport. Most routes have one or more stops.

How can I find the best flight deal to Samui International?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Samui International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Koh Samui?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Koh Samui is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from London Heathrow Airport to Samui International with?

Currently, Air China offers the cheapest flight tickets to Samui International.

Flying from London Heathrow Airport (LHR) to Samui International Airport (USM): what you need to know

Koh Samui is seven hours ahead of London and is in the UTC+7 timezone.
Leave enough time to make your LHR to USM flight. As a rule of thumb, arrive two hours before international departures and an hour ahead for domestic flights.
Flying during a peak time like July? School holidays and other popular seasons can mean longer queues at airport checkpoints. Play things extra safe and get there up to four hours before international flights and two hours before a domestic departure.
If you'd like to explore another city along the way, just uncheck 'Direct flights only' when searching for your ticket from London Heathrow Airport to Samui International Airport. Here are the top stopovers between LHR and USM:
- Bangkok Suvarnabhumi Airport
- Singapore Changi Airport
- Hong Kong Intl Airport

How to find the cheapest flights from London Heathrow Airport (LHR) to Samui International Airport (USM)

The lowest price we've seen for a one-way London Heathrow Airport to Samui International Airport flight is 335 €. A return fare is currently 646 €. Depending on the availability when you book, these fares can change.
Don't leave everything to the last minute. You're more likely to get cheap tickets from LHR to USM if you book in advance. Airlines often offer some fantastic early bird rates.
If you're willing to be flexible with your trip dates, use the 'Whole month' tool. It'll find the lowest price across the month when looking for your flight from London Heathrow Airport to Samui International Airport.
You don't need to check back in every day to see if fares have dropped when you create a Price Alert. We'll let you know as soon as there's a new deal on cheap flights from LHR to USM.
Lock in the ideal flight for you by using the filters. To see the 'Fastest,' 'Best' or 'Cheapest' flights from London Heathrow Airport to Samui International Airport, use the 'Sort by' tool. You can also filter results by airline, arrival and departure times, and journey duration.

Handy information about London Heathrow Airport (LHR)

Of the flights that depart from London Heathrow Airport, 78% arrive as scheduled at their destination.
To reach London Heathrow Airport from central London, it takes about 45 minutes by car. This depends on traffic though. It's approximately 24 kilometres from the airport to the city centre.
The trip on public transport typically takes 25 minutes.
Get your journey off to a hassle-free start by staying near LHR. Whether you've booked an early flight from London Heathrow Airport to Samui International Airport or just don't want to be rushed, these stays are ideal:

Arriving at Samui International Airport (USM)

If you're arriving on a late London Heathrow Airport to Samui International Airport flight, nothing beats the convenience of being close to the terminal. Grab your bags from the carousel and then be showered and snoozing soon after at one of these options near USM:
Grab a Samui International Airport rental car and discover Koh Samui and beyond with your own set of wheels. Asap car rental, Hertz and Drive Car Rental are top outlets to choose from here.
Lock in the best deal by booking your vehicle from Samui International Airport around four weeks ahead of your departure.

Getting from Samui International Airport (USM) to central Koh Samui

From Samui International Airport, Koh Samui is approximately 11 kilometres away. It takes around 20 minutes to get to the centre driving.
If you're travelling by public transport, expect a journey of about 30 minutes.

When to fly to Samui International Airport (USM)

It's time to choose your trip dates for your flight from London Heathrow Airport to Samui International Airport. December is the busiest month to head to Koh Samui. If you prefer a more low-key vibe, go in May.
The warmest month in Koh Samui is May, with the temperature ranging between 25ºC (77ºF) and 30ºC (86ºF). Book your flights from London Heathrow Airport to Samui International Airport in this month if you like this kind of weather.
Look for cheap tickets from LHR to USM in January if you like travelling in cooler conditions. Temperatures are at their lowest then, ranging between 23ºC (73ºF) and 28ºC (82ºF) on average.

Explore more of Thailand

Koh Samui has loads to offer, but there are so many other corners of Thailand waiting to be explored. Around 467 kilometres north of Koh Samui, a visit to Bangkok will keep you on the move. Start with attractions like Grand Palace, Wat Phra Kaew and Songkran Festival Silom.