Q: How much does it cost for a return flight from London Heathrow Airport to Ko Samui?

Airfare is below average for this route at the moment. London Heathrow Airport to Ko Samui flights typically cost between £795 and £910 in October. The cheapest return price found within the last 5 days was £672 on SWISS (27 Oct–3 Nov).

Question 1

What day of the week experiences the fewest flight delays on this route?

Accepted Answer

Saturday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Question 2

What’s the top stopover airport for flights from London Heathrow Airport to Ko Samui?

Accepted Answer

Bangkok (BKK) – chosen by Cheapflights users on 79% of one-stop itineraries from London Heathrow Airport to Ko Samui on Cheapflights.

Question 3

How much does it cost for a return flight from London Heathrow Airport to Ko Samui?

Accepted Answer

Airfare is below average for this route at the moment.London Heathrow Airport to Ko Samui flights typically cost between £795 and £910 in October.
The cheapest return price found within the last 5 days was £672 on SWISS (27 Oct–3 Nov).

Question 4

What’s the cheapest stopover airport for flights from London Heathrow Airport to Ko Samui?

Accepted Answer

Chengdu (TFU) is the most affordable one-stop option, with an average return flight price of £418.

Question 5

How often are flights from London to Ko Samui delayed?

Accepted Answer

About 9% of weekly flights between London and Ko Samui have experienced delays in the past year, with the average delay time being 162 minutes.

Question 6

Which airline has the best punctuality record on London to Ko Samui flights?

Accepted Answer

Over the past year, Delta have had the lowest number of delays on this route, with just 5% of flights being delayed.

Question 7

What is the most punctual flight time for London to Ko Samui flights?

Accepted Answer

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

Question 8

What’s the fastest stopover option from London Heathrow Airport to Ko Samui?

Accepted Answer

Flights via Vienna (VIE) have the shortest average one-way travel time for one-stop routes: 13h 20m.

Question 9

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Ko Samui?

Accepted Answer

Flights via Vienna (VIE) offer the fastest connection on this route, with an average stopover time of 0h 50m.

Question 10

How long is the flight from London Heathrow Airport to Ko Samui?

Accepted Answer

There are many flights that can get you from London Heathrow Airport to Ko Samui in 19h 45m. Fly via Gulf Air, Qatar Airways, or British Airways to get the fastest option. London Heathrow Airport and Ko Samui are separated by a distance of 6144 mi. This flight may include one or multiple stops.

Question 11

What are the cheapest airlines flying from London Heathrow Airport to Ko Samui round-trip?

Accepted Answer

Currently priced at £117, Bangkok Airways will fly you from London Heathrow Airport to Ko Samui and back. In addition to Bangkok Airways, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Oman Air and Austrian Airlines - these airlines can fly you to your destination from £461 and £589, respectively. Bangkok Airways is currently priced 87% below the average price you’ll pay for this route.

Question 12

How far ahead should I book a flight from London Heathrow Airport to Ko Samui?

Accepted Answer

The best time to book flights from London Heathrow Airport to Ko Samui is 84 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Question 13

What is the cheapest month to book a flight from London Heathrow Airport to Ko Samui?

Accepted Answer

Currently, November is the cheapest month in which you can book a flight from London Heathrow Airport to Ko Samui (average of £820). Flying from London Heathrow Airport to Ko Samui in December is currently the most expensive (average of £1,220). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 14

E

Accepted Answer

In terms of precipitation, rainfall in Ko Samui ranges from 58.0 - 490.0 inches per month. November is typically the wettest month, when rainfall can reach 490.0 mm. February is typically the driest time to visit Ko Samui when rainfall is around 58.0 mm.

Question 15

E

Accepted Answer

If weather is an important factor for your trip to Ko Samui, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 29.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 27.0 C).

Question 16

What are the most popular airlines that fly from London Heathrow Airport to Ko Samui?

Accepted Answer

The most popular airlines flying from London Heathrow Airport to Ko Samui are Thai Airways, EVA Air and Singapore Airlines. Something to consider prior to booking your flight.

Question 17

Where are the most common stopover locations when flying from London Heathrow Airport to Ko Samui?

Accepted Answer

The most popular stopover on flights from London Heathrow Airport to Ko Samui is Bangkok.

Question 18

Where are the least popular stopover locations for London Heathrow Airport to Ko Samui flights?

Accepted Answer

London Heathrow Airport to Ko Samui flights that have stopovers will least frequently stop in Singapore.

Question 19

What are some popular things to do or see while on a stopover in Bangkok?

Accepted Answer

Bangkok travellers tend to visit Pratunam, Siam Square, and Patpong Night Market more than anywhere else. Travelers on a layover in Bangkok can visit Pratunam, Siam Square, and Patpong Night Market, by traveling 14.8 mi, 15.1 mi, and 14.9 mi, respectively after landing at Bangkok Suvarnabhumi. Those looking to explore during their stopover in Bangkok can hire a car from Bangkok Suvarnabhumi for about £22 per day.

Question 20

What is the cheapest time of day to fly from LHR to USM?

Accepted Answer

When flying from London Heathrow Airport to Ko Samui, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Question 21

What airport do you fly into for flights to Ko Samui from London Heathrow?

Accepted Answer

Most people fly into Ko Samui (USM) if they book a flight to Ko Samui from London Heathrow. On average, Ko Samui has 0 inbound flights from London Heathrow per day from 13 airlines. Ko Samui is conveniently located just 2.1 mi from Ko Samui’s city center.

Question 22

Can I find deals for flights from Heathrow to Ko Samui that include hotel bookings?

Accepted Answer

Yes. In addition to deals on Heathrow to Ko Samui flights, Cheapflights offers holiday packages that include both flights and hotel.

Question 23

How can I find direct flights from Heathrow to Ko Samui?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Ko Samui.

Question 24

Can I find deals for business class flights from Heathrow to Ko Samui?

Accepted Answer

Yes. Cheapflights offers flight deals from Heathrow to Ko Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 25

How does Cheapflights help users find flights from Heathrow to Ko Samui?

Accepted Answer

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Ko Samui. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Question 26

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Ko Samui?

Accepted Answer

Cheapflights simply makes it quick and affordable to book flights from Heathrow to Ko Samui by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Question 27

Can Cheapflights find flights from Heathrow to Ko Samui with no change fees?

Accepted Answer

Cheapflights does show flights with no change fees to all users. To see these options for flights from Heathrow to Ko Samui, users can toggle the no change fees filter when performing a flight search.

Question 28

Can Cheapflights notify me if prices for flights from Heathrow to Ko Samui become cheaper?

Accepted Answer

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Ko Samui from Heathrow today and book when prices fit your budget.

Round-trip from	£672
One-way from	£344
Popular in	December
Cheapest in	November
Average price	£879

Airline	Cheapest	Average	Flexibility	On-time
Bangkok Airways	Cheapest£117	Average£166	FlexibilityNo cancel fee	On-time74%	Search Bangkok Airways flights
Oman Air	Cheapest£461	Average£948	FlexibilityNo cancel fee	On-time76%	Search Oman Air flights
Austrian Airlines	Cheapest£589	Average£683	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights
Lufthansa	Cheapest£600	Average£779	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Etihad Airways	Cheapest£611	Average£788	FlexibilityNo cancel fee	On-time75%	Search Etihad Airways flights
SWISS	Cheapest£612	Average£707	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
British Airways	Cheapest£716	Average£1,095	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
EVA Air	Cheapest£734	Average£860	FlexibilityNo cancel fee	On-time74%	Search EVA Air flights
Singapore Airlines	Cheapest£754	Average£956	FlexibilityNo cancel fee	On-time81%	Search Singapore Airlines flights
Qatar Airways	Cheapest£793	Average£900	FlexibilityNo cancel fee	On-time68%	Search Qatar Airways flights

Cheap flights from London Heathrow Airport to Ko Samui from £344

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to Ko Samui

Cheapest flights from Heathrow to Ko SamuiExplore the most affordable flight options available from Heathrow to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2026.

Explore the most affordable flight options available from Heathrow to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2026.

Best flights from Heathrow to Ko SamuiDiscover carefully curated flight deals from Heathrow to Ko Samui that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 September 2026.

Discover carefully curated flight deals from Heathrow to Ko Samui that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 September 2026.

Last-minute flights from Heathrow to Ko SamuiDiscover last-minute flight deals from Heathrow to Ko Samui. Data last updated 17 September 2026 and is based on user searches.

Discover last-minute flight deals from Heathrow to Ko Samui. Data last updated 17 September 2026 and is based on user searches.

One-way flights from Heathrow to Ko SamuiSearch for one-way flight options from Heathrow to Ko Samui. Find affordable one-way fares based on user searches. Data last updated 17 September 2026.

Search for one-way flight options from Heathrow to Ko Samui. Find affordable one-way fares based on user searches. Data last updated 17 September 2026.

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Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Ko Samui that are best for you.

Best time to book a flight from Heathrow to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Heathrow with our price prediction graph.

Cheapflights Insights

How far ahead should I book a flight from London Heathrow Airport to Ko Samui?

The best time to book flights from London Heathrow Airport to Ko Samui is 84 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from London Heathrow Airport to Ko Samui?

How much does it cost for a return flight from London Heathrow Airport to Ko Samui?

Airfare is below average for this route at the moment.

London Heathrow Airport to Ko Samui flights typically cost between £795 and £910 in October.The cheapest return price found within the last 5 days was £672 on SWISS (27 Oct–3 Nov).

How often are flights from London to Ko Samui delayed?

About 9% of weekly flights between London and Ko Samui have experienced delays in the past year, with the average delay time being 162 minutes.

What is the most punctual flight time for London to Ko Samui flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Ko Samui flights?

Over the past year, Delta have had the lowest number of delays on this route, with just 5% of flights being delayed.

What’s the top stopover airport for flights from London Heathrow Airport to Ko Samui?

Bangkok (BKK) – chosen by Cheapflights users on 79% of one-stop itineraries from London Heathrow Airport to Ko Samui on Cheapflights.

What’s the cheapest stopover airport for flights from London Heathrow Airport to Ko Samui?

Chengdu (TFU) is the most affordable one-stop option, with an average return flight price of £418.

What’s the fastest stopover option from London Heathrow Airport to Ko Samui?

Flights via Vienna (VIE) have the shortest average one-way travel time for one-stop routes: 13h 20m.

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Ko Samui?

Flights via Vienna (VIE) offer the fastest connection on this route, with an average stopover time of 0h 50m.

Reviews of airlines servicing Ko Samui

Read through reviews of airlines operating flights from London Heathrow Airport to Ko Samui, such as EVA Air,Singapore Airlines, andThai Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

What airport do you fly into for flights to Ko Samui from London Heathrow?

How long is the flight from London Heathrow Airport to Ko Samui?

What are the cheapest airlines flying from London Heathrow Airport to Ko Samui round-trip?

Where are the most common stopover locations when flying from London Heathrow Airport to Ko Samui?

What are some popular things to do or see while on a stopover in Bangkok?

Where are the least popular stopover locations for London Heathrow Airport to Ko Samui flights?

Can I find deals for flights from Heathrow to Ko Samui that include hotel bookings?

How can I find direct flights from Heathrow to Ko Samui?

Can I find deals for business class flights from Heathrow to Ko Samui?

What is the cheapest month to book a flight from London Heathrow Airport to Ko Samui?

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Alternative routes for Heathrow to Ko Samui

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Complete your trip

Complete your trip to Ko Samui by adding a car hire and/or hotel booking to your travel itinerary.

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Search flights from Heathrow to Ko Samui by cabin class

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Other flights to Ko Samui

Explore flights to Ko Samui departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 17 September 2026.

Heathrow and Ko Samui flights

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Other flights from Heathrow

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Top 10 airlines flying from Heathrow to Ko Samui

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Why should you use Cheapflights to find cheap flight tickets from Heathrow to Ko Samui?

Cheapest flights from Heathrow to Ko Samui
Explore the most affordable flight options available from Heathrow to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2026.

Best flights from Heathrow to Ko Samui
Discover carefully curated flight deals from Heathrow to Ko Samui that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 September 2026.

Last-minute flights from Heathrow to Ko Samui
Discover last-minute flight deals from Heathrow to Ko Samui. Data last updated 17 September 2026 and is based on user searches.

One-way flights from Heathrow to Ko Samui
Search for one-way flight options from Heathrow to Ko Samui. Find affordable one-way fares based on user searches. Data last updated 17 September 2026.

London Heathrow Airport to Ko Samui flights typically cost between £795 and £910 in October.
The cheapest return price found within the last 5 days was £672 on SWISS (27 Oct–3 Nov).