How long is the flight from Ko Samui to London?

Gulf Air, Emirates, and SWISS can get you from Ko Samui to London in just under 21h 35m. Your travel time can differ by up to 8h 05m. 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 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.

£240+ 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 4 August 2026.

Wed 16/1219:00 -

1 stop25h 05m

Wed 6/109:50 -

2 stops38h 20m

Deal found 4/8£654

Wed 16/1219:00 -

1 stop25h 05m

Thu 7/111:05 -

2 stops37h 05m

Deal found 4/8£688

Wed 16/1219:00 -

1 stop25h 05m

Tue 5/111:05 -

2 stops37h 05m

Deal found 4/8£691

Sun 13/915:25 -

2 stops26h 05m

Sun 20/912:30 -

2 stops22h 05m

Deal found 30/7£728

Sat 19/914:35 -

2 stops22h 20m

Sat 26/922:00 -

2 stops31h 40m

Deal found 3/8£728

Tue 15/1211:10 -

1 stop16h 40m

Wed 6/109:50 -

2 stops38h 20m

Deal found 4/8£729

Thu 17/911:05 -

2 stops25h 35m

Thu 1/1009:00 -

2 stops27h 50m

Deal found 31/7£754

Wed 16/918:25 -

2 stops23h 40m

Sun 27/912:35 -

2 stops38h 45m

Deal found 2/8£766

Fri 11/915:25 -

2 stops26h 05m

Sun 13/920:35 -

2 stops29h 50m

Deal found 1/8£769

Thu 17/1207:00 -

1 stop21h 05m

Wed 6/117:40 -

2 stops30h 30m

Deal found 4/8£769

Thu 17/1207:00 -

1 stop21h 05m

Tue 5/112:40 -

1 stop24h 45m

Deal found 4/8£770

Thu 17/917:35 -

2 stops23h 55m

Thu 1/1020:45 -

2 stops28h 25m

Deal found 31/7£772

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 4 August 2026.

Wed 16/1219:00 -

1 stop25h 05m

Thu 7/111:05 -

2 stops37h 05m

Deal found 4/8£688

Tue 15/915:20 -

2 stops21h 35m

Tue 6/1022:05 -

2 stops37h 00m

Deal found 30/7£814

Thu 12/1116:25 -

2 stops26h 15m

Mon 16/1113:35 -

2 stops24h 30m

Deal found 3/8£853

Wed 16/1209:20 -

2 stops29h 20m

Thu 7/118:40 -

2 stops19h 25m

Deal found 4/8£972

Tue 15/909:15 -

1 stop16h 05m

Tue 6/1021:35 -

1 stop18h 00m

Deal found 2/8£989

Mon 26/1015:50 -

2 stops21h 35m

Wed 28/1009:25 -

2 stops18h 15m

Deal found 30/7£993

Wed 23/919:15 -

1 stop16h 40m

Sat 26/922:15 -

1 stop16h 15m

Deal found 30/7£1,015

Thu 12/1118:05 -

1 stop19h 20m

Mon 16/1109:20 -

1 stop24h 50m

Deal found 3/8£1,250

Tue 15/1208:15 -

1 stop19h 35m

Wed 6/109:50 -

1 stop15h 35m

Deal found 4/8£766

Thu 12/1116:25 -

2 stops21h 45m

Mon 16/1113:40 -

2 stops24h 25m

Deal found 3/8£879

Thu 27/818:15 -

2 stops32h 10m

Sun 30/819:00 -

2 stops30h 45m

Deal found 1/8£801

Thu 17/1210:00 -

2 stops18h 40m

Wed 6/118:40 -

2 stops19h 25m

Deal found 4/8£979

Thu 27/818:15 -

2 stops29h 50m

Sun 30/818:00 -

2 stops31h 45m

Deal found 1/8£818

Tue 15/1209:20 -

2 stops29h 40m

Wed 6/118:40 -

2 stops19h 25m

Deal found 4/8£1,017

Tue 15/909:15 -

1 stop16h 05m

Tue 6/1021:35 -

1 stop16h 55m

Deal found 3/8£989

Sat 19/916:25 -

2 stops26h 50m

Sat 26/912:10 -

2 stops19h 35m

Deal found 3/8£2,733

Thu 17/1210:00 -

2 stops29h 40m

Wed 6/109:15 -

2 stops22h 40m

Deal found 4/8£1,152

Thu 17/1210:00 -

2 stops29h 40m

Tue 5/109:15 -

2 stops22h 55m

Deal found 4/8£1,152

Thu 17/916:25 -

2 stops22h 15m

Thu 1/1013:10 -

2 stops17h 35m

Deal found 31/7£1,189

Tue 15/1210:00 -

2 stops29h 40m

Tue 5/109:15 -

2 stops22h 40m

Deal found 4/8£1,191

Tue 15/1210:00 -

2 stops29h 40m

Thu 7/109:15 -

2 stops22h 40m

Deal found 4/8£1,191

Wed 16/1210:00 -

2 stops29h 40m

Tue 5/109:15 -

2 stops22h 40m

Deal found 4/8£1,191

Fri 28/811:55 -

2 stops26h 55m

Sun 30/817:50 -

2 stops18h 25m

Deal found 2/8£2,835

Thu 27/816:25 -

2 stops22h 15m

Sun 30/818:00 -

2 stops21h 10m

Deal found 2/8£1,618

Find flight deals from Ko Samui to London

Round-trip from	£654
One-way from	£240

16/12-6/1
3 total stops
63h 25m total
Ko Samui to London

Search Deals

6/11
2 total stops
43h 05m total
Ko Samui to London

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Wed 16/12

19:00-13:05

1 stop25h 05m

London Gatwick

Thu 7/1

11:05-07:10

2 stops37h 05m

£688

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Tue 15/12

08:15-20:50

1 stop19h 35m

London Gatwick

Wed 6/1

09:50-08:25

1 stop15h 35m

£766

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 27/8

18:15-20:25

2 stops32h 10m

London Heathrow

Sun 30/8

19:00-07:45

2 stops30h 45m

£801

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 15/9

15:20-06:55

2 stops21h 35m

London Heathrow

Tue 6/10

22:05-17:05

2 stops37h 00m

£814

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Thu 27/8

18:15-18:05

2 stops29h 50m

London Gatwick

Sun 30/8

18:00-07:45

2 stops31h 45m

£818

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Thu 12/11

16:25-11:40

2 stops26h 15m

London Gatwick

Mon 16/11

13:35-21:05

2 stops24h 30m

£853

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 12/11

16:25-07:10

2 stops21h 45m

London Heathrow

Mon 16/11

13:40-21:05

2 stops24h 25m

£879

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Wed 16/12

09:20-07:40

2 stops29h 20m

London Gatwick

Thu 7/1

18:40-21:05

2 stops19h 25m

£972

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 17/12

10:00-21:40

2 stops18h 40m

London Heathrow

Wed 6/1

18:40-21:05

2 stops19h 25m

£979

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 15/9

09:15-19:20

1 stop16h 05m

London Heathrow

Tue 6/10

21:35-21:35

1 stop18h 00m

£989

Flights are sorted by cheapest return flights first.

Deals found on 2/8

Showing 1-10 of 52 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?
Gulf Air, Emirates, and SWISS can get you from Ko Samui to London in just under 21h 35m. Your travel time can differ by up to 8h 05m. 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 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.

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 £240

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 6/11. 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 4 August 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 4 August 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 4 August 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 4 August 2026.

Last-minute flights from Ko Samui to LondonDiscover last-minute flight deals from Ko Samui to London. Data last updated 4 August 2026 and is based on user searches.

Discover last-minute flight deals from Ko Samui to London. Data last updated 4 August 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 4 August 2026.

Search for one-way flight options from Ko Samui to London. Find affordable one-way fares based on user searches. Data last updated 4 August 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 4 August 2026.

Ko Samui and London flights

Browse other Ko Samui and London flight options. Last updated on 4 August 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 4 August 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 4 August 2026.

Last-minute flights from Ko Samui to London
Discover last-minute flight deals from Ko Samui to London. Data last updated 4 August 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 4 August 2026.