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

A quick flight from Ko Samui to London Heathrow Airport can take about 17h 35m. EVA Air provides one of the quickest options available for as low as ฿37,037. Airlines will cover a distance of 9888 km. Both multi-stop and direct flights can be found to your destination and back. Find deals

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

Currently, December is the cheapest month in which you can book a flight from Ko Samui to London Heathrow Airport (average of ฿810). Flying from Ko Samui to London Heathrow Airport in July is currently the most expensive (average of ฿1,014). 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. Find deals

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm. Find deals

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C). Find deals

What is the cheapest month to fly from Ko Samui to London Heathrow Airport?

Our data shows that October tends to be the cheapest month to fly to London Heathrow Airport from Ko Samui. Users have commonly found prices around ฿40,583 for the month, but tickets can be as low as ฿17,250. Due to multiple factors, prepare for potentially higher prices in January.

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

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

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

Most people fly from Ko Samui (USM) if they book a flight from Ko Samui to London Heathrow. On average, Ko Samui has 0 outbound flights to London Heathrow per day from 0 airlines. Ko Samui is conveniently located just 3.3 km from Ko Samui’s city centre.

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

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

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

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

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

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

฿12,557+ Flights from Ko Samui to London Heathrow Airport

Cheap flight deals from Ko Samui to Heathrow

Round-trip from	฿32,439
One-way from	฿12,557
Popular in	January
Cheapest in	October
Average price	฿48,897

28/10-4/11
4 total stops
38h 05m total
Ko Samui to London

Search Deals

11/12
3 total stops
33h 40m total
Ko Samui to London

Search Deals

Highest demand for flights based on searches. 15% potential increase in price (฿239,122 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 6% potential price decrease (฿81,498 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

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Find flight deals from Ko Samui to Heathrow

Cheapest flights from Ko Samui to Heathrow
Explore the most affordable flight options available from Ko Samui to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 September 2025.

Tue 28/1010:00USM - LHR

2 stops18h 40mMultiple Airlines

Tue 4/1118:40LHR - USM

2 stops19h 25mMultiple Airlines

Deal found 13/9฿32,439

Tue 28/1008:30USM - LHR

1 stop17h 35mEVA Air

Tue 4/1121:20LHR - USM

1 stop16h 05mEVA Air

Deal found 13/9฿37,037

Tue 28/1016:25USM - LHR

2 stops28h 25mEmirates

Tue 4/1113:40LHR - USM

2 stops21h 35mEmirates

Deal found 13/9฿45,060

Best flights from Ko Samui to Heathrow
Discover carefully curated flight deals from Ko Samui to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 September 2025.

Tue 28/1010:00USM - LHR

2 stops18h 40mMultiple Airlines

Tue 4/1118:40LHR - USM

2 stops19h 25mMultiple Airlines

Deal found 13/9฿32,439

Tue 28/1008:30USM - LHR

1 stop17h 35mEVA Air

Tue 4/1121:20LHR - USM

1 stop16h 05mEVA Air

Deal found 13/9฿37,037

Tue 28/1016:25USM - LHR

2 stops28h 25mEmirates

Tue 4/1113:40LHR - USM

2 stops21h 35mEmirates

Deal found 13/9฿45,060

Last-minute flights from Ko Samui to Heathrow
Discover last-minute flight deals from Ko Samui to Heathrow. Data last updated 13 September 2025 and is based on user searches.

Tue 28/1010:00USM - LHR

2 stops18h 40mMultiple Airlines

Tue 4/1118:40LHR - USM

2 stops19h 25mMultiple Airlines

Deal found 13/9฿32,439

Tue 28/1008:30USM - LHR

1 stop17h 35mEVA Air

Tue 4/1121:20LHR - USM

1 stop16h 05mEVA Air

Deal found 13/9฿37,037

Tue 28/1016:25USM - LHR

2 stops28h 25mEmirates

Tue 4/1113:40LHR - USM

2 stops21h 35mEmirates

Deal found 13/9฿45,060

One-way flights from Ko Samui to Heathrow
Search for one-way flight options from Ko Samui to Heathrow. Find affordable one-way fares based on user searches. Data last updated 13 September 2025.

Thu 11/1219:00USM - LHR

3 stops33h 40mMultiple Airlines

Deal found 13/9฿12,557

Fri 12/1215:50USM - LHR

2 stops21h 05mMultiple Airlines

Deal found 13/9฿12,652

Tue 3/215:50USM - LHR

2 stops33h 35mMultiple Airlines

Deal found 13/9฿12,779

Mon 8/1215:05USM - LHR

2 stops34h 20mMultiple Airlines

Deal found 13/9฿14,206

Wed 10/1219:00USM - LHR

3 stops33h 20mMultiple Airlines

Deal found 13/9฿14,270

Wed 10/1213:25USM - LHR

2 stops24h 15mเอทิฮัดแอร์เวย์

Deal found 13/9฿14,872

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 28/10

10:00-21:40

2 stops18h 40m

London Heathrow

Tue 4/11

18:40-21:05

2 stops19h 25m

฿32,439

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 28/10

08:30-19:05

1 stop17h 35m

London Heathrow

Tue 4/11

21:20-20:25

1 stop16h 05m

฿37,037

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 28/10

16:25-13:50

2 stops28h 25m

London Heathrow

Tue 4/11

13:40-18:15

2 stops21h 35m

฿45,060

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 11/12

19:00-21:40

3 stops33h 40m

฿12,557

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fri 12/12

15:50-05:55

2 stops21h 05m

฿12,652

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 3/2

15:50-18:25

2 stops33h 35m

฿12,779

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 8/12

15:05-18:25

2 stops34h 20m

฿14,206

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 10/12

19:00-21:20

3 stops33h 20m

฿14,270

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 13/1

11:40-12:10

2 stops31h 30m

฿17,377

Flights are sorted by cheapest return flights first.

Deals found on 13/9

Best time to book a flight from Ko Samui to Heathrow

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

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

What airport do you fly from for flights from Ko Samui to London Heathrow?
Most people fly from Ko Samui (USM) if they book a flight from Ko Samui to London Heathrow. On average, Ko Samui has 0 outbound flights to London Heathrow per day from 0 airlines. Ko Samui is conveniently located just 3.3 km from Ko Samui’s city centre.
How long is the flight from Ko Samui to London Heathrow Airport?
A quick flight from Ko Samui to London Heathrow Airport can take about 17h 35m. EVA Air provides one of the quickest options available for as low as ฿37,037. Airlines will cover a distance of 9888 km. Both multi-stop and direct flights can be found to your destination and back.
Can I find deals for flights from Ko Samui to Heathrow that include hotel bookings?
Yes. In addition to deals on Ko Samui to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Ko Samui to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ko Samui to Heathrow.
Can I find deals for business class flights from Ko Samui to Heathrow?
Yes. Cheapflights offers flight deals from Ko Samui to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Ko Samui to London Heathrow Airport?
Currently, December is the cheapest month in which you can book a flight from Ko Samui to London Heathrow Airport (average of ฿810). Flying from Ko Samui to London Heathrow Airport in July is currently the most expensive (average of ฿1,014). 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.

See more FAQs

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Cheapflights makes it easy to find Ko Samui to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Ko Samui to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ko Samui to Heathrow flexibly with Cheapflights today.

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

Yes, Cheapflights offers price alerts on Ko Samui to Heathrow flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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Cheap flights from Ko Samui to London Heathrow Airport from ฿12,557

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ko Samui to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ko Samui to Heathrow

Cheapest flights from Ko Samui to HeathrowExplore the most affordable flight options available from Ko Samui to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 September 2025.

Explore the most affordable flight options available from Ko Samui to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 September 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Ko Samui to Heathrow

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

Related info for your journey

Find useful and relevant information for your journey from Ko Samui to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

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

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

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

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

Travelling to a place near London Heathrow Airport?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ko Samui to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

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

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

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

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Cheapest flights from Ko Samui to Heathrow
Explore the most affordable flight options available from Ko Samui to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 September 2025.