How long is the flight from Ko Samui to London?

EVA Air, Qatar Airways, and Singapore Airlines can get you from Ko Samui to London in just under 18h 50m. Your travel time can differ by up to 9h 40m. Ko Samui and London are separated by a distance of 6144 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

What are the cheapest airlines to fly from Ko Samui to London one-way?

The cheapet airlines for a one-way flight from Ko Samui to London are Thai Airways (£423), Qatar Airways (£445), and EVA Air (£451).

In terms of precipitation, rainfall in London 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 when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London, 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).

What are the most popular routes from Ko Samui to London?

When deciding which route to take from Ko Samui to London consider Ko Samui - London Heathrow, Ko Samui - London Gatwick or Ko Samui - London City as they are the most popular.

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

When flying from Ko Samui to London, 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?

If you book a flight to London from Ko Samui, you will be flying from Ko Samui, which is the city’s only airport. Ko Samui (USM) is located 2.1 mi from the center of Ko Samui. There are 0 flights from Ko Samui to London per day from 0 different airlines.

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

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

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

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

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

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

£247+ Flights from Ko Samui to London

Cheap flight deals from Ko Samui to London

Enter your travel dates to find the best prices.

Best flights from Ko Samui to London
Discover carefully curated flight deals from Ko Samui to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 2 January 2026.

Wed 28/117:40USM - LHR

3 stops44h 40mMultiple Airlines

Wed 25/220:55LHR - USM

2 stops28h 10mMultiple Airlines

Deal found 1/1£859

Wed 28/107:15USM - LHR

1 stop18h 50mEVA Air

Wed 25/221:20LHR - USM

1 stop14h 20mEVA Air

Deal found 1/1£896

Mon 9/317:05USM - LGW

2 stops19h 50mQatar Airways

Wed 11/308:40LGW - USM

2 stops26h 45mQatar Airways

Deal found 31/12£1,023

Mon 9/308:55USM - LGW

1 stop28h 30mSingapore Airlines

Wed 11/309:20LGW - USM

1 stop24h 50mSingapore Airlines

Deal found 31/12£1,196

Mon 9/309:00USM - LHR

1 stop17h 05mEVA Air

Wed 11/321:20LHR - USM

1 stop14h 20mEVA Air

Deal found 31/12£960

Mon 9/315:35USM - LHR

2 stops21h 50mQatar Airways

Wed 11/308:05LHR - USM

2 stops19h 35mQatar Airways

Deal found 31/12£1,054

Last-minute flights from Ko Samui to London
Discover last-minute flight deals from Ko Samui to London. Data last updated 2 January 2026 and is based on user searches.

Wed 28/117:40USM - LHR

3 stops44h 40mMultiple Airlines

Wed 25/220:55LHR - USM

2 stops28h 10mMultiple Airlines

Deal found 1/1£859

Wed 28/107:15USM - LHR

1 stop18h 50mEVA Air

Wed 25/221:20LHR - USM

1 stop14h 20mEVA Air

Deal found 1/1£896

Wed 28/117:40USM - LHR

2 stops20h 40mQatar Airways

Wed 25/214:55LHR - USM

2 stops18h 30mQatar Airways

Deal found 30/12£1,064

Wed 28/111:40USM - LHR

1 stop36h 40mCathay Pacific

Wed 25/211:00LHR - USM

1 stop25h 35mCathay Pacific

Deal found 1/1£1,108

One-way flights from Ko Samui to London
Search for one-way flight options from Ko Samui to London. Find affordable one-way fares based on user searches. Data last updated 2 January 2026.

Tue 21/407:50USM - LHR

2 stops41h 40mMultiple Airlines

Deal found 1/1£247

Fri 5/607:50USM - LHR

2 stops37h 15mMultiple Airlines

Deal found 1/1£266

Sat 2/507:50USM - LHR

2 stops29h 10mMultiple Airlines

Deal found 2/1£286

Sat 14/208:50USM - LHR

2 stops40h 20mEtihad Airways

Deal found 31/12£292

Sat 28/318:15USM - LHR

2 stops30h 05mMultiple Airlines

Deal found 31/12£299

Fri 5/607:50USM - LGW

3 stops41h 25mMultiple Airlines

Deal found 1/1£324

Sat 14/219:00USM - LGW

3 stops34h 55mMultiple Airlines

Deal found 31/12£332

Sat 28/308:15USM - LGW

2 stops28h 20mMultiple Airlines

Deal found 31/12£348

Fri 13/219:00USM - LHR

3 stops48h 05mMultiple Airlines

Deal found 31/12£352

Fri 13/219:00USM - LGW

3 stops35h 50mMultiple Airlines

Deal found 31/12£352

Sat 2/507:50USM - LGW

3 stops37h 55mMultiple Airlines

Deal found 2/1£353

Mon 16/219:00USM - LHR

3 stops52h 20mMultiple Airlines

Deal found 31/12£356

Find flight deals from Ko Samui to London

Round-trip from	£859
One-way from	£247

Etihad Airways
28/1-25/2
5 total stops
72h 50m total
Ko Samui to London

Search Deals

21/4
2 total stops
41h 40m total
Ko Samui to London

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 28/1

17:40-07:20

3 stops44h 40m

London Heathrow

Wed 25/2

20:55-08:05

2 stops28h 10m

£859

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 28/1

07:15-19:05

1 stop18h 50m

London Heathrow

Wed 25/2

21:20-18:40

1 stop14h 20m

£896

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 9/3

09:00-19:05

1 stop17h 05m

London Heathrow

Wed 11/3

21:20-18:40

1 stop14h 20m

£960

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 9/3

17:05-05:55

2 stops19h 50m

London Gatwick

Wed 11/3

08:40-18:25

2 stops26h 45m

£1,023

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 9/3

15:35-06:25

2 stops21h 50m

London Heathrow

Wed 11/3

08:05-10:40

2 stops19h 35m

£1,054

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 9/3

08:55-06:25

1 stop28h 30m

London Gatwick

Wed 11/3

09:20-17:10

1 stop24h 50m

£1,196

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 21/4

07:50-19:30

2 stops41h 40m

£247

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fri 5/6

07:50-15:05

2 stops37h 15m

£266

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 14/2

08:50-18:10

2 stops40h 20m

£292

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 28/3

18:15-17:20

2 stops30h 05m

£299

Flights are sorted by cheapest return flights first.

Deals found on 1/1

Showing 1-10 of 30 results

Best time to book a flight from Ko Samui to London

Have a flexible travel schedule? Discover the best time to fly to London 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.

Cheapflights Insights

Everything you need to know about your flight from Ko Samui to London

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

Bangkok (BKK) – chosen by Cheapflights users on 78% of one-stop itineraries from Ko Samui to London on Cheapflights.

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

Singapore (SIN) is the most affordable one-stop option, with an average return flight price of £831.

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

Flights via Bangkok (BKK) have the shortest average one-way travel time for one-stop routes: 16h 05m.

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

Flights via Bangkok (BKK) offer the fastest connection on this route, with an average stopover time of 2h 25m.

Reviews of airlines servicing London

See what other customers who have flown with Austrian Airlines from Ko Samui to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Austrian Airlines

7.6

Good

888 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful

Austrian Airlines

7.6

Good

888 reviews

Austrian Airlines

7.6

Good

888 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Anonymous,Dec 2025

VIE - DXB

Related info for your journey

What airport do you fly from for flights from Ko Samui to London?
If you book a flight to London from Ko Samui, you will be flying from Ko Samui, which is the city’s only airport. Ko Samui (USM) is located 2.1 mi from the center of Ko Samui. There are 0 flights from Ko Samui to London per day from 0 different airlines.
How long is the flight from Ko Samui to London?
EVA Air, Qatar Airways, and Singapore Airlines can get you from Ko Samui to London in just under 18h 50m. Your travel time can differ by up to 9h 40m. Ko Samui and London are separated by a distance of 6144 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines to fly from Ko Samui to London one-way?
The cheapet airlines for a one-way flight from Ko Samui to London are Thai Airways (£423), Qatar Airways (£445), and EVA Air (£451).
What are the most popular routes from Ko Samui to London?
When deciding which route to take from Ko Samui to London consider Ko Samui - London Heathrow, Ko Samui - London Gatwick or Ko Samui - London City as they are the most popular.
Can I find deals for flights from Ko Samui to London that include hotel bookings?
Yes. In addition to deals on Ko Samui to London flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Ko Samui to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ko Samui to London.
Can I find deals for business class flights from Ko Samui to London?
Yes. Cheapflights offers flight deals from Ko Samui to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

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

Cheapflights helps you find that perfect flight to London from Ko Samui by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

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

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Cheap flights from Ko Samui to London from £247

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 21/4. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ko Samui to London

Best flights from Ko Samui to LondonDiscover carefully curated flight deals from Ko Samui to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 2 January 2026.

Discover carefully curated flight deals from Ko Samui to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 2 January 2026.

Find flight deals from Ko Samui to London

Round-trip from

One-way from

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

Best time to book a flight from Ko Samui to London

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

Cheapflights Insights

Everything you need to know about your flight from Ko Samui to London

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

Share of one-stop return flights from Ko Samui to London chosen by Cheapflights users in the past 12 months, using the same stopover each way.

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

Average return fare for one-stop flights from Ko Samui to London, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

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

Shortest average travel time for one-stop one-way flights from Ko Samui to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

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

Average stopover duration for one-stop one-way flights from Ko Samui to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Reviews of airlines servicing London

See what other customers who have flown with Austrian Airlines from Ko Samui to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Ko Samui to London. 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?

How long is the flight from Ko Samui to London?

What are the cheapest airlines to fly from Ko Samui to London one-way?

What are the most popular routes from Ko Samui to London?

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

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

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

Travelling to a place near London?

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Alternative routes for Ko Samui to London

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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 London?

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

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

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

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Best flights from Ko Samui to London
Discover carefully curated flight deals from Ko Samui to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 2 January 2026.