How long is the flight from Ko Samui to London?

A quick flight from Ko Samui to London can take about 22h 15m. สวิส อินเตอร์เนชั่นแนล แอร์ไลน์ provides one of the quickest options available for as low as ฿41,923. The distance between Ko Samui and London is about 9854 km.

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 Gatwick, Ko Samui - London Heathrow 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?

For a flight from Ko Samui to London, you will be flying from Ko Samui. Ko Samui (USM) is just 3.3 km from the centre of the city. Ko Samui is the only Ko Samui airport and it handles 0 outbound flights to London per day. 0 airlines have flights to London from Ko Samui on a regular basis.

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.

฿12,154+ Cheap Flights from Ko Samui to London

Cheap flight deals from Ko Samui to London

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from Ko Samui to London
Explore the most affordable flight options available from Ko Samui to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 September 2026.

Mon 19/1008:00 -

2 stops30h 45m

Mon 2/1108:45 -

2 stops26h 40m

Deal found 18/9฿25,973

Sun 1/1111:10 -

2 stops28h 25m

Sun 8/1108:45 -

3 stops25h 15m

Deal found 17/9฿27,372

Mon 19/1018:15 -

3 stops30h 30m

Mon 2/1109:30 -

2 stops23h 10m

Deal found 18/9฿28,071

Mon 12/1011:05 -

2 stops25h 30m

Mon 19/1013:50 -

3 stops24h 35m

Deal found 14/9฿30,069

Thu 8/1014:30 -

2 stops22h 10m

Thu 22/1006:30 -

3 stops26h 15m

Deal found 15/9฿35,264

Thu 8/1011:05 -

3 stops25h 55m

Thu 22/1014:45 -

3 stops35h 00m

Deal found 15/9฿35,430

Sun 1/1120:30 -

1 stop17h 10m

Sun 8/1121:10 -

2 stops27h 35m

Deal found 17/9฿36,829

Mon 19/1016:25 -

2 stops22h 15m

Mon 2/1113:30 -

2 stops24h 35m

Deal found 16/9฿41,923

Mon 19/1016:25 -

2 stops22h 15m

Mon 2/1118:15 -

2 stops19h 50m

Deal found 14/9฿42,823

Sun 1/1116:25 -

2 stops23h 15m

Sun 8/1117:15 -

2 stops20h 50m

Deal found 17/9฿45,453

Thu 8/1016:25 -

2 stops22h 15m

Thu 22/1018:00 -

2 stops21h 10m

Deal found 15/9฿48,783

Mon 12/1016:25 -

2 stops22h 15m

Mon 19/1013:10 -

2 stops17h 35m

Deal found 14/9฿50,048

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 19 September 2026.

Mon 19/1008:00 -

2 stops30h 45m

Mon 2/1108:45 -

2 stops26h 40m

Deal found 18/9฿25,973

Mon 19/1019:00 -

2 stops17h 40m

Mon 2/1108:35 -

2 stops26h 40m

Deal found 14/9฿37,761

Mon 19/1007:50 -

2 stops42h 50m

Mon 2/1116:15 -

2 stops21h 10m

Deal found 18/9฿41,724

Mon 19/1016:25 -

2 stops22h 15m

Mon 2/1113:30 -

2 stops24h 35m

Deal found 16/9฿41,923

Mon 19/1018:15 -

3 stops30h 30m

Mon 2/1109:30 -

2 stops23h 10m

Deal found 18/9฿28,071

Sun 1/1112:25 -

3 stops28h 55m

Sun 8/1108:45 -

3 stops25h 15m

Deal found 17/9฿28,337

Mon 12/1011:05 -

2 stops25h 30m

Mon 19/1013:50 -

3 stops24h 35m

Deal found 14/9฿30,069

Thu 8/1014:30 -

2 stops22h 10m

Thu 22/1006:30 -

3 stops26h 15m

Deal found 15/9฿35,264

Thu 8/1016:25 -

2 stops22h 15m

Thu 22/1018:00 -

2 stops21h 10m

Deal found 15/9฿48,783

Thu 8/1011:05 -

3 stops25h 55m

Thu 22/1014:45 -

3 stops35h 00m

Deal found 15/9฿35,430

Mon 12/1016:25 -

2 stops22h 15m

Mon 19/1013:10 -

2 stops17h 35m

Deal found 14/9฿50,048

Wed 23/1207:00 -

2 stops31h 45m

Sun 3/112:45 -

2 stops25h 35m

Deal found 17/9฿37,395

Wed 23/1207:00 -

2 stops42h 25m

Sun 3/108:25 -

2 stops23h 30m

Deal found 17/9฿39,459

Mon 12/1006:00 -

1 stop19h 15m

Mon 19/1022:40 -

2 stops26h 30m

Deal found 14/9฿41,357

Mon 19/1016:25 -

2 stops22h 15m

Mon 2/1118:15 -

2 stops19h 50m

Deal found 14/9฿42,823

Sun 1/1116:25 -

2 stops23h 15m

Sun 8/1117:15 -

2 stops20h 50m

Deal found 17/9฿45,453

Fri 18/1209:20 -

2 stops17h 15m

Fri 1/118:55 -

2 stops17h 55m

Deal found 15/9฿55,809

Last-minute flights from Ko Samui to London
Discover last-minute flight deals from Ko Samui to London. Data last updated 19 September 2026 and is based on user searches.

Thu 8/1014:30 -

2 stops22h 10m

Thu 22/1006:30 -

3 stops26h 15m

Deal found 15/9฿35,264

Thu 8/1011:05 -

3 stops25h 55m

Thu 22/1014:45 -

3 stops35h 00m

Deal found 15/9฿35,430

Thu 8/1016:25 -

2 stops22h 15m

Thu 22/1018:00 -

2 stops21h 10m

Deal found 15/9฿48,783

Mon 12/1011:05 -

2 stops25h 30m

Mon 19/1013:50 -

3 stops24h 35m

Deal found 14/9฿30,069

Mon 12/1016:25 -

2 stops22h 15m

Mon 19/1013:10 -

2 stops17h 35m

Deal found 14/9฿50,048

Mon 19/1008:00 -

2 stops30h 45m

Mon 2/1108:45 -

2 stops26h 40m

Deal found 18/9฿25,973

Mon 19/1018:15 -

3 stops30h 30m

Mon 2/1109:30 -

2 stops23h 10m

Deal found 18/9฿28,071

Mon 19/1019:00 -

2 stops17h 40m

Mon 2/1108:35 -

2 stops26h 40m

Deal found 14/9฿37,761

Mon 19/1016:25 -

2 stops22h 15m

Mon 2/1113:30 -

2 stops24h 35m

Deal found 16/9฿41,923

Mon 19/1016:25 -

2 stops22h 15m

Mon 2/1118:15 -

2 stops19h 50m

Deal found 14/9฿42,823

Find flight deals from Ko Samui to London

Round-trip from	฿25,973
One-way from	฿12,154
Popular in	April
Cheapest in	August
Average price	฿43,921

19/10-2/11
4 total stops
57h 25m total
Ko Samui to London

Search Deals

27/10-31/12
2 total stops
25h 15m total
Ko Samui to London

Search Deals

Highest demand for flights based on searches. 15% potential increase in price (฿274,965 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 8% potential price decrease (฿114,500 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Mon 12/10

08:40-19:10

3 stops40h 30m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿13,519

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Sun 11/10

08:40-19:10

3 stops40h 30m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿13,519

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Tue 13/10

11:05-19:30

3 stops38h 25m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿13,819

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Tue 6/10

06:55-17:45

2 stops40h 50m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿14,518

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Tue 27/10

08:50-21:55

3 stops44h 05m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿14,618

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Sun 11/10

08:40-15:00

2 stops36h 20m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿14,652

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Tue 13/10

11:05-13:00

3 stops55h 55m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿15,184

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Wed 28/10

08:50-07:10

3 stops29h 20m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿15,651

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Sat 27/2

08:55-18:25

2 stops40h 30m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿15,784

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Sat 27/2

16:30-06:20

2 stops20h 50m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿16,050

Flights are sorted by cheapest return flights first.

Deals found on 18/9

Showing 1-10 of 43 resultsSorted by cheapest first

...

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.

USM-LON

USM-LGW

USM-LHR

USM-LCY

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

USM-LON

USM-LGW

USM-LHR

USM-LCY

No data available for this route at this time. Please check back soon.

Related info for your journey

What airport do you fly from for flights from Ko Samui to London?
For a flight from Ko Samui to London, you will be flying from Ko Samui. Ko Samui (USM) is just 3.3 km from the centre of the city. Ko Samui is the only Ko Samui airport and it handles 0 outbound flights to London per day. 0 airlines have flights to London from Ko Samui on a regular basis.
How long is the flight from Ko Samui to London?
A quick flight from Ko Samui to London can take about 22h 15m. สวิส อินเตอร์เนชั่นแนล แอร์ไลน์ provides one of the quickest options available for as low as ฿41,923. The distance between Ko Samui and London is about 9854 km.
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 Gatwick, Ko Samui - London Heathrow 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.

See more FAQs

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

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

Certainly. Search results for flights to London from Ko Samui shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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Cheap flights from Ko Samui to London from ฿12,154

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/10. 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

Cheapest flights from Ko Samui to LondonExplore the most affordable flight options available from Ko Samui to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 September 2026.

Explore the most affordable flight options available from Ko Samui to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 September 2026.

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 19 September 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 19 September 2026.

Last-minute flights from Ko Samui to LondonDiscover last-minute flight deals from Ko Samui to London. Data last updated 19 September 2026 and is based on user searches.

Discover last-minute flight deals from Ko Samui to London. Data last updated 19 September 2026 and is based on user searches.

One-way flights from Ko Samui to LondonSearch for one-way flight options from Ko Samui to London. Find affordable one-way fares based on user searches. Data last updated 19 September 2026.

Search for one-way flight options from Ko Samui to London. Find affordable one-way fares based on user searches. Data last updated 19 September 2026.

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Related info for your journey

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 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?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ko Samui to London

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Complete your trip

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Direct flights to England

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Search flights from Ko Samui to London by cabin class

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Other flights to London

Explore flights to London departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 19 September 2026.

Ko Samui and London flights

Browse other Ko Samui and London flight options. Last updated on 19 September 2026.

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

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

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Cheapest flights from Ko Samui to London
Explore the most affordable flight options available from Ko Samui to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 September 2026.

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 19 September 2026.

Last-minute flights from Ko Samui to London
Discover last-minute flight deals from Ko Samui to London. Data last updated 19 September 2026 and is based on user searches.

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 19 September 2026.