How long is the flight from Ko Samui to London?

Lufthansa, SWISS, and British Airways can get you from Ko Samui to London in just under 16h 40m. Your travel time can differ by up to 18h 25m. Ko Samui and London are separated by a distance of 6138 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 City, Ko Samui - London Gatwick or Ko Samui - London Heathrow as they are the most popular.

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.

£276+ Flights from Ko Samui to London

Cheap flight deals from Ko Samui to London

Round-trip from	£676
One-way from	£276
Popular in	January
Cheapest in	June
Average price	£887

Austrian Airlines
17/5-19/5
4 total stops
35h 50m total
Ko Samui to London

Search Deals

1/12
3 total stops
46h 25m total
Ko Samui to London

Search Deals

Highest demand for flights based on searches. 14% potential increase in price (£135 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 6% potential price decrease (£49 potential savings vs. average return price).

Search Deals

Average for round-trip flights in November 2025

Search Deals

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 18 November 2025.

Wed 26/1116:25USM - LGW

2 stops26h 15mEmirates

Sun 30/1109:40LGW - USM

2 stops25h 35mEmirates

Deal found 17/11£848

Wed 26/1116:25USM - LCY

2 stops27h 30mSWISS

Sun 30/1113:20LCY - USM

2 stops19h 15mSWISS

Deal found 16/11£879

Wed 26/1117:40USM - LGW

1 stop18h 50mBritish Airways

Sun 30/1121:15LGW - USM

1 stop15h 35mBritish Airways

Deal found 17/11£1,183

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 18 November 2025.

Sun 17/513:30USM - LCY

2 stops35h 05mLufthansa

Tue 19/509:15LCY - USM

2 stops29h 55mLufthansa

Deal found 15/11£741

Sun 17/516:25USM - LGW

2 stops31h 25mSWISS

Tue 19/518:35LGW - USM

2 stops36h 10mSWISS

Deal found 15/11£789

Sun 17/519:15USM - LGW

1 stop16h 40mBritish Airways

Tue 19/522:15LGW - USM

1 stop17h 20mBritish Airways

Deal found 15/11£994

Thu 1/108:30USM - LGW

1 stop16h 50mMultiple Airlines

Thu 8/113:25LGW - USM

2 stops46h 25mMultiple Airlines

Deal found 17/11£1,123

Thu 1/107:55USM - LHR

1 stop18h 10mEVA Air

Thu 8/121:20LHR - USM

1 stop15h 30mEVA Air

Deal found 17/11£1,181

Thu 1/107:55USM - LHR

2 stops20h 45mMultiple Airlines

Thu 8/113:30LHR - USM

2 stops40h 35mMultiple Airlines

Deal found 17/11£1,194

Thu 1/116:25USM - LCY

2 stops23h 55mMultiple Airlines

Thu 8/117:40LCY - USM

2 stops20h 25mMultiple Airlines

Deal found 17/11£1,370

Last-minute flights from Ko Samui to London
Discover last-minute flight deals from Ko Samui to London. Data last updated 18 November 2025 and is based on user searches.

Wed 26/1116:25USM - LGW

2 stops26h 15mEmirates

Sun 30/1109:40LGW - USM

2 stops25h 35mEmirates

Deal found 17/11£848

Wed 26/1116:25USM - LCY

2 stops27h 30mSWISS

Sun 30/1113:20LCY - USM

2 stops19h 15mSWISS

Deal found 16/11£879

Wed 26/1117:40USM - LGW

1 stop18h 50mBritish Airways

Sun 30/1121:15LGW - USM

1 stop15h 35mBritish Airways

Deal found 17/11£1,183

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 18 November 2025.

Mon 1/1208:15USM - LGW

3 stops46h 25mMultiple Airlines

Deal found 16/11£276

Sun 30/1109:05USM - LGW

2 stops40h 25mMultiple Airlines

Deal found 16/11£303

Fri 28/1108:30USM - LGW

2 stops29h 00mMultiple Airlines

Deal found 17/11£310

Mon 1/1219:00USM - LHR

3 stops29h 30mMultiple Airlines

Deal found 17/11£320

Thu 27/1119:00USM - LHR

2 stops29h 30mMultiple Airlines

Deal found 17/11£326

Thu 27/1119:00USM - LGW

2 stops42h 30mMultiple Airlines

Deal found 17/11£328

Fri 28/1108:30USM - LHR

2 stops40h 00mMultiple Airlines

Deal found 17/11£334

Sun 30/1109:05USM - LHR

3 stops39h 25mMultiple Airlines

Deal found 16/11£344

Mon 1/1216:25USM - LCY

3 stops36h 25mMultiple Airlines

Deal found 16/11£396

Mon 1/1216:25USM - LCY

2 stops27h 30mSWISS

Deal found 17/11£416

Thu 27/1108:15USM - LCY

2 stops31h 30mSWISS

Deal found 17/11£433

Tue 13/111:40USM - LHR

2 stops31h 35mQatar Airways

Deal found 17/11£453

Fly from

Fly to

Route

Depart

Return

Price

Ko SamuiLondon

USM - LCY

USMLCY

Ko Samui

Sun 17/5

13:30-18:35

2 stops35h 05m

London City

Tue 19/5

09:15-21:10

2 stops29h 55m

£741

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Sun 17/5

16:25-17:50

2 stops31h 25m

London Gatwick

Tue 19/5

18:35-12:45

2 stops36h 10m

£789

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Sun 17/5

19:15-05:55

1 stop16h 40m

London Gatwick

Tue 19/5

22:15-21:35

1 stop17h 20m

£994

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Thu 1/1

08:30-18:20

1 stop16h 50m

London Gatwick

Thu 8/1

13:25-18:50

2 stops46h 25m

£1,123

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 1/1

07:55-19:05

1 stop18h 10m

London Heathrow

Thu 8/1

21:20-19:50

1 stop15h 30m

£1,181

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 1/1

07:55-21:40

2 stops20h 45m

London Heathrow

Thu 8/1

13:30-13:05

2 stops40h 35m

£1,194

Ko SamuiLondon

USM - LCY

USMLCY

Ko Samui

Thu 1/1

16:25-09:20

2 stops23h 55m

London City

Thu 8/1

17:40-21:05

2 stops20h 25m

£1,370

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 1/12

08:15-23:40

3 stops46h 25m

£276

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Sun 30/11

09:05-18:30

2 stops40h 25m

£303

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Fri 28/11

08:30-06:30

2 stops29h 00m

£310

Flights are sorted by cheapest return flights first.

Deals found on 16/11

Showing 1-10 of 29 results

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?

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?

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?

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?

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?

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

Reviews of airlines servicing London

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

873 reviews

Check prices

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

873 reviews

Austrian Airlines

7.6

Good

873 reviews

Check prices

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

3,664 reviews

Austrian Airlines

7.6

Good

873 reviews

Check prices

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

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, SWISS, and British Airways can get you from Ko Samui to London in just under 16h 40m. Your travel time can differ by up to 18h 25m. Ko Samui and London are separated by a distance of 6138 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 City, Ko Samui - London Gatwick or Ko Samui - London Heathrow 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.

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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!

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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 £276

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 1/12. 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

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find 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 18 November 2025.

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 18 November 2025.

Cheapflights Fare Finder

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

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

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 18 November 2025.

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.

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.

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.

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.

Reviews of airlines servicing London

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.

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?

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?

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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.

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?

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

Can Cheapflights 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?

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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 18 November 2025.