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Cheap flights from Ko Samui to London from £232

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 2/12. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LON
11 Dec — 18 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ko Samui to London

Discover tips and strategies to find the most affordable flight options for your journey from Ko Samui (USM) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 11 November 2025.

Round-trip from

£729

One-way from

£232

Popular in

January

Cheapest in

June

Average price

£887
25/12-1/1
  • 25/12-1/1
  • 4 total stops
  • 48h 10m total
  • Ko Samui to London
Search Deals
2/12
  • 2/12
  • 3 total stops
  • 46h 40m total
  • Ko Samui to London
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£109 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£50 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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Find flight deals from Ko Samui to London

Enter your travel dates to find the best prices.

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 11 November 2025.

Thu 25/1207:00USM - LGW
1 stop18h 20mMultiple Airlines
Thu 1/107:00LGW - USM
3 stops29h 50mMultiple Airlines
Deal found 10/11£729
Sun 30/1118:15USM - LGW
3 stops36h 40mMultiple Airlines
Thu 1/107:00LGW - USM
3 stops29h 50mMultiple Airlines
Deal found 10/11£757
Thu 25/1220:30USM - LHR
2 stops28h 40mMultiple Airlines
Thu 1/116:50LHR - USM
2 stops20h 00mMultiple Airlines
Deal found 10/11£940
Sun 30/1117:40USM - LHR
2 stops20h 00mMultiple Airlines
Thu 1/113:30LHR - USM
2 stops21h 10mMultiple Airlines
Deal found 10/11£994
Sun 7/1216:35USM - LGW
1 stop32h 55mMultiple Airlines
Sun 14/1206:25LGW - USM
2 stops42h 35mMultiple Airlines
Deal found 9/11£1,001
Thu 25/1208:30USM - LHR
1 stop18h 05mThai Airways
Thu 1/111:50LHR - USM
1 stop17h 00mThai Airways
Deal found 10/11£1,050
Sun 7/1211:40USM - LHR
2 stops26h 40mMultiple Airlines
Sun 14/1208:35LHR - USM
2 stops19h 00mMultiple Airlines
Deal found 9/11£1,088
Sun 30/1109:20USM - LCY
2 stops30h 20mMultiple Airlines
Thu 1/117:40LCY - USM
2 stops40h 10mMultiple Airlines
Deal found 10/11£1,167
Sun 30/1111:40USM - LHR
1 stop34h 20mCathay Pacific
Thu 1/122:05LHR - USM
1 stop38h 30mCathay Pacific
Deal found 10/11£1,168
Sun 30/1119:10USM - LGW
1 stop17h 20mBritish Airways
Thu 1/121:15LGW - USM
1 stop16h 10mBritish Airways
Deal found 10/11£1,235
Sun 7/1216:25USM - LCY
2 stops27h 30mMultiple Airlines
Sun 14/1213:20LCY - USM
2 stops19h 20mMultiple Airlines
Deal found 9/11£1,540

Cheapflights Fare Finder

 
Customise your flight search to find flights from Ko Samui to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 11 November 2025.
Use the filters below to find and compare flights from Ko Samui to London that are best for you.

Fly from

Ko Samui

Fly to

London

Route

Depart

Return

Price

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Sun 30/11

18:15-23:55

3 stops36h 40m

London Gatwick

Thu 1/1

07:00-19:50

3 stops29h 50m

£757

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Thu 25/12

07:00-23:40

2 stops23h 40m

London Gatwick

Thu 1/1

07:00-19:45

3 stops29h 45m

£796

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Tue 10/2

08:15-23:55

3 stops46h 40m

London Gatwick

Fri 13/2

07:25-12:45

3 stops22h 20m

£817

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 10/2

13:25-08:05

2 stops25h 40m

London Heathrow

Fri 13/2

17:30-21:05

2 stops20h 35m

£924

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 25/12

20:30-18:10

2 stops28h 40m

London Heathrow

Thu 1/1

16:50-19:50

2 stops20h 00m

£940

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 30/11

17:40-06:40

2 stops20h 00m

London Heathrow

Thu 1/1

13:30-17:40

2 stops21h 10m

£994

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Sun 7/12

16:35-18:30

1 stop32h 55m

London Gatwick

Sun 14/12

06:25-08:00

2 stops42h 35m

£1,001

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 25/12

08:30-19:35

1 stop18h 05m

London Heathrow

Thu 1/1

11:50-11:50

1 stop17h 00m

£1,050

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 10/2

20:30-18:40

2 stops29h 10m

London Heathrow

Fri 13/2

19:20-18:55

3 stops40h 35m

£1,088

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 7/12

11:40-07:20

2 stops26h 40m

London Heathrow

Sun 14/12

08:35-10:35

2 stops19h 00m

£1,088

Flights are sorted by cheapest return flights first.

Deals found on 9/11

Showing 1-10 of 45 results
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2
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5

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

Find hourly flight availability from Ko Samui to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 11 November 2025.

When flying from Ko Samui to London, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 47% versus a flight at midday.

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.

Bangkok (BKK) – chosen by Cheapflights users on 80% of one-stop itineraries from Ko Samui to London on Cheapflights.

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.

Singapore (SIN) is the most affordable one-stop option, with an average return flight price of £850.

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.

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?

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.

Flights via Bangkok (BKK) offer the fastest connection on this route, with an average stopover time of 2h 43m.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 11 November 2025.
See what other customers who have flown with Austrian Airlines and Qatar Airways 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
864 reviews
Check prices

Boarding

7.6

Comfort

7.3

Overall

7.6

Crew

8.1

Entertainment

6.8

Food

6.8

Reviews

1 / 20
10.0
Excellent

Andrew,Sept 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
Austrian Airlines
7.6
Good
864 reviews
Austrian Airlines
7.6
Good
864 reviews
Check prices

Boarding

7.6

Comfort

7.3

Overall

7.6

Crew

8.1

Entertainment

6.8

Food

6.8

Reviews

1 / 20
10.0
Excellent

Andrew,Sept 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
Qatar Airways
7.4
Good
3,660 reviews
Austrian Airlines
7.6
Good
864 reviews
Check prices

Boarding

7.6

Comfort

7.3

Overall

7.6

Crew

8.1

Entertainment

6.8

Food

6.8

Reviews

1 / 20
10.0
Excellent

Andrew,Sept 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.

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?

    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?

    Lufthansa and SWISS can get you from Ko Samui to London in just under 25h 40m. Your travel time can differ by up to 4h 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 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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Alternative routes for Ko Samui to London

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

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?

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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