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Cheap flights from Ko Samui to London from £272

USM — LON
20 Oct — 27 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ko Samui to London

Enter your travel dates to find the best prices.

Cheapest flights from Ko Samui to London

Mon 19/1008:00 -
2 stops30h 45m
Mon 2/1108:45 -
2 stops26h 40m
Deal found 18/9£582
Sun 1/1111:10 -
2 stops28h 25m
Sun 8/1108:45 -
3 stops25h 15m
Deal found 17/9£614
Mon 19/1018:15 -
3 stops30h 30m
Mon 2/1109:30 -
2 stops23h 10m
Deal found 18/9£629
Sat 17/1015:20 -
2 stops21h 15m
Fri 30/1008:45 -
2 stops18h 55m
Deal found 19/9£760
Sat 17/1011:05 -
2 stops25h 25m
Fri 30/1009:30 -
2 stops20h 05m
Deal found 19/9£782
Thu 8/1019:45 -
3 stops29h 00m
Thu 22/1014:45 -
3 stops35h 00m
Deal found 16/9£797
Thu 8/1017:25 -
2 stops19h 30m
Thu 22/1016:00 -
3 stops22h 25m
Deal found 16/9£808
Sun 1/1120:30 -
1 stop17h 10m
Sun 8/1121:10 -
2 stops27h 35m
Deal found 17/9£826
Wed 23/1207:00 -
2 stops31h 45m
Sun 3/112:45 -
2 stops25h 35m
Deal found 17/9£838
Mon 19/1016:25 -
2 stops22h 15m
Mon 2/1113:30 -
2 stops24h 35m
Deal found 16/9£940
Sun 1/1116:25 -
2 stops23h 15m
Sun 8/1117:15 -
2 stops20h 50m
Deal found 17/9£1,019
Thu 8/1016:25 -
2 stops22h 15m
Thu 22/1018:00 -
2 stops21h 10m
Deal found 16/9£1,141

Find flight deals from Ko Samui to London

Round-trip from

£582

One-way from

£272

Popular in

April

Cheapest in

August

Average price

£985
19/10-2/11
  • 19/10-2/11
  • 4 total stops
  • 57h 25m total
  • Ko Samui to London
Search Deals
27/10-31/12
  • 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 (£138 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease (£58 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2026
Search Deals

Cheapflights Fare Finder

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

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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

£303

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

£303

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Sun 27/9

07:50-18:10

2 stops40h 20m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

£324

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

£325

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Wed 28/10

15:50-15:55

2 stops31h 05m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

£328

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

£328

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

£340

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

£360

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Tue 6/10

13:30-06:55

2 stops23h 25m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

£361

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Mon 5/10

17:55-09:55

2 stops22h 00m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

£364

Flights are sorted by cheapest return flights first.

Deals found on 18/9

Showing 1-10 of 41 resultsSorted by cheapest first
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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.
Estimated return price

Cheapflights Insights

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

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?

    SWISS can get you from Ko Samui to London in just under 22h 15m. Your travel time can differ by up to . Ko Samui and London are separated by a distance of 6123 mi.

  • 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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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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