How long is the flight from Ko Samui to London?

Oman Air, Emirates, and Qatar Airways can get you from Ko Samui to London in just under 19h. Your travel time can differ by up to 14h 50m. 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.

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 City or Ko Samui - London Gatwick 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.

£297+ 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 6 September 2026.

Tue 20/1006:00 -

3 stops23h 55m

Tue 27/1007:10 -

3 stops25h 00m

Deal found 5/9£649

Mon 19/1019:00 -

2 stops20h 55m

Mon 26/1016:25 -

3 stops20h 25m

Deal found 4/9£679

Wed 23/906:00 -

2 stops35h 30m

Wed 7/1012:30 -

2 stops22h 05m

Deal found 31/8£727

Tue 29/917:55 -

3 stops23h 35m

Tue 6/1013:35 -

3 stops24h 50m

Deal found 31/8£737

Wed 23/917:50 -

2 stops30h 55m

Wed 7/1010:20 -

2 stops28h 30m

Deal found 31/8£740

Fri 25/917:25 -

2 stops27h 55m

Wed 7/1012:30 -

2 stops22h 05m

Deal found 31/8£747

Fri 25/914:30 -

2 stops24h 15m

Wed 7/1005:35 -

3 stops23h 40m

Deal found 31/8£748

Tue 20/1006:00 -

2 stops31h 30m

Tue 27/1020:30 -

2 stops27h 40m

Deal found 5/9£763

Tue 29/919:00 -

2 stops23h 45m

Tue 6/1012:30 -

2 stops22h 05m

Deal found 31/8£769

Sat 17/1008:40 -

3 stops27h 50m

Sat 24/1008:25 -

3 stops28h 25m

Deal found 2/9£774

Fri 16/1006:00 -

2 stops34h 15m

Fri 23/1021:05 -

2 stops28h 30m

Deal found 1/9£783

Mon 19/1014:00 -

2 stops26h 15m

Mon 26/1019:20 -

2 stops32h 20m

Deal found 4/9£794

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 6 September 2026.

Tue 20/1006:00 -

3 stops23h 55m

Tue 27/1007:10 -

3 stops25h 00m

Deal found 5/9£649

Tue 15/915:20 -

2 stops33h 50m

Sat 19/920:50 -

2 stops18h 45m

Deal found 3/9£846

Wed 16/916:25 -

2 stops33h 20m

Sun 20/909:05 -

2 stops30h 05m

Deal found 2/9£887

Tue 15/919:00 -

2 stops19h 00m

Tue 6/1016:00 -

2 stops17h 45m

Deal found 3/9£889

Mon 19/1016:25 -

2 stops22h 15m

Mon 26/1018:15 -

2 stops19h 50m

Deal found 4/9£955

Tue 20/1008:45 -

2 stops29h 55m

Tue 27/1009:15 -

2 stops19h 40m

Deal found 5/9£982

Tue 15/909:15 -

1 stop16h 05m

Tue 6/1021:35 -

1 stop16h 55m

Deal found 2/9£996

Mon 19/1017:55 -

3 stops23h 20m

Mon 26/1016:25 -

3 stops21h 00m

Deal found 4/9£700

Tue 29/919:00 -

2 stops23h 45m

Tue 6/1012:30 -

2 stops22h 05m

Deal found 31/8£769

Wed 16/912:10 -

2 stops24h 30m

Sun 20/909:00 -

2 stops27h 00m

Deal found 5/9£915

Tue 15/916:25 -

2 stops20h 40m

Sat 19/909:05 -

2 stops30h 05m

Deal found 31/8£993

Sat 17/1007:50 -

2 stops28h 40m

Sat 24/1011:00 -

2 stops27h 25m

Deal found 2/9£872

Sat 17/1016:25 -

2 stops26h 50m

Sat 24/1012:10 -

2 stops18h 55m

Deal found 2/9£2,196

Fri 16/1006:00 -

2 stops30h 40m

Fri 23/1011:35 -

2 stops22h 55m

Deal found 1/9£914

Fri 9/1009:15 -

2 stops29h 10m

Sun 25/1013:20 -

2 stops18h 50m

Deal found 2/9£1,229

Wed 23/909:15 -

1 stop16h 05m

Wed 7/1012:30 -

2 stops22h 05m

Deal found 31/8£925

Fri 16/1009:15 -

2 stops29h 10m

Fri 23/1013:10 -

2 stops17h 35m

Deal found 1/9£1,282

Mon 19/1007:50 -

1 stop17h 25m

Mon 26/1019:20 -

2 stops32h 20m

Deal found 4/9£953

Wed 23/909:15 -

2 stops29h 25m

Wed 7/1013:10 -

2 stops17h 35m

Deal found 31/8£1,398

Tue 20/1009:15 -

1 stop16h 05m

Tue 27/1021:20 -

1 stop16h 05m

Deal found 5/9£970

Tue 29/909:15 -

2 stops29h 25m

Tue 6/1013:10 -

2 stops17h 35m

Deal found 31/8£1,398

Fri 25/909:15 -

2 stops29h 10m

Wed 7/1013:10 -

2 stops18h 00m

Deal found 31/8£1,398

Find flight deals from Ko Samui to London

Round-trip from	£649
One-way from	£297
Popular in	April
Cheapest in	August
Average price	£976

20/10-27/10
6 total stops
48h 55m total
Ko Samui to London

Search Deals

15/10-31/12
3 total stops
43h 30m total
Ko Samui to London

Search Deals

Highest demand for flights based on searches. 15% potential increase in price (£135 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 8% potential price decrease (£57 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 - LGW London Gatwick

USMLGW

Ko Samui

Fri 26/2

07:15-13:40

2 stops37h 25m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

£342

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Mon 28/9

08:00-19:10

3 stops41h 10m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

£350

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Mon 28/9

17:55-08:20

3 stops44h 25m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

£365

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Sun 31/1

18:05-12:20

3 stops49h 15m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

£368

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Fri 22/1

13:25-14:45

2 stops32h 20m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

£374

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Sat 30/1

08:55-10:15

3 stops56h 20m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

£374

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Tue 26/1

16:30-06:35

2 stops21h 05m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

£378

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Tue 26/1

14:05-06:30

2 stops23h 25m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

£378

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Wed 20/1

18:15-13:05

1 stop25h 50m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

£382

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Fri 26/2

07:15-16:05

3 stops39h 50m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

£390

Flights are sorted by cheapest return flights first.

Deals found on 1/9

Showing 1-10 of 51 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-LHR

USM-LGW

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-LHR

USM-LGW

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?
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?
Oman Air, Emirates, and Qatar Airways can get you from Ko Samui to London in just under 19h. Your travel time can differ by up to 14h 50m. 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 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 City or Ko Samui - London Gatwick 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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How does Cheapflights help users find flights from Ko Samui to London?

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!

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

Yes! Cheapflights helps users easily 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?

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 £297

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/10. 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 6 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 6 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 6 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 6 September 2026.

Last-minute flights from Ko Samui to LondonDiscover last-minute flight deals from Ko Samui to London. Data last updated 6 September 2026 and is based on user searches.

Discover last-minute flight deals from Ko Samui to London. Data last updated 6 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 6 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 6 September 2026.

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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

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

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

Alternative routes for Ko Samui to London

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

Complete your trip

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

Direct flights to England

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Search flights from Ko Samui to London by cabin class

Find flights from Ko Samui to London, based on your preferred cabin class, be it economy, premium economy, business, or first class.

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 6 September 2026.

Ko Samui and London flights

Browse other Ko Samui and London flight options. Last updated on 6 September 2026.

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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 6 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 6 September 2026.

Last-minute flights from Ko Samui to London
Discover last-minute flight deals from Ko Samui to London. Data last updated 6 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 6 September 2026.