What are the cheapest airlines flying from Ko Samui to London round-trip?

Flying on SWISS is currently your cheapest option to London, with prices starting at £709. Additional return tickets that might be worth considering are offered by Lufthansa and Emirates, with the lowest prices starting at £756 and £757, respectively. You may be able to fly from Ko Samui to London for 23% less than the average price by searching for these airlines.

What are the cheapest airlines to fly from Ko Samui to London one-way?

The cheapet airlines for a one-way flight from Ko Samui to London are Qatar Airways (£411), Thai Airways (£444), and Etihad Airways (£496).

What is the cheapest month to book a flight from Ko Samui to London?

Currently, January is the cheapest month in which you can book a flight from Ko Samui to London (average of £112). Flying from Ko Samui to London in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest day to fly from Ko Samui to London?

Travellers seeking maximum savings on their Ko Samui to London flight should consider departing on Monday mornings when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 Gatwick, Ko Samui - London Heathrow or Ko Samui - London City as they are the most popular.

What is the cheapest day to fly round-trip from Ko Samui to London?

Travelers have found that booking a Thursday departure is the best way to save up to 22% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

What is the cheapest month to fly from Ko Samui to London?

The best pricing can be found in the month of October. Prices to London from Ko Samui average £927. You can even find prices in October for less than £927, as users have found deals to London from as low as £400. The month of January appears to be one of the more expensive times to travel to London from Ko Samui. Flying in the targeted month can save you up to 65%.

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.

£406+ Flights from Ko Samui to London

Cheap flight deals from Ko Samui to London

Round-trip from	£595
One-way from	£406
Popular in	January
Cheapest in	October
Average price	£862

3/11-15/11
4 total stops
59h 35m total
Ko Samui to London

Search Deals

14/8
2 total stops
25h 25m total
Ko Samui to London

Search Deals

Highest demand for flights based on searches. 16% potential increase in price (£139 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 8% potential price decrease (£51 potential savings vs. average return price).

Search Deals

Average for round-trip flights in July 2025

Search Deals

Find flight deals from Ko Samui to London

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 July 2025.

Mon 3/1107:00USM - LGW

2 stops32h 35mMultiple Airlines

Sat 15/1110:30LGW - USM

2 stops27h 00mMultiple Airlines

Deal found 9/7£595

Mon 3/1107:00USM - LHR

2 stops33h 35mMultiple Airlines

Sat 15/1106:00LHR - USM

2 stops21h 50mMultiple Airlines

Deal found 10/7£610

Mon 27/1009:20USM - LHR

2 stops19h 20mSWISS

Sat 8/1113:50LHR - USM

2 stops24h 15mSWISS

Deal found 10/7£709

Mon 27/1016:25USM - LGW

2 stops32h 25mSWISS

Sat 8/1118:40LGW - USM

2 stops19h 25mSWISS

Deal found 9/7£716

Mon 27/1016:25USM - LCY

2 stops23h 10mSWISS

Sat 8/1112:20LCY - USM

2 stops25h 45mSWISS

Deal found 10/7£734

Sun 16/1113:25USM - LHR

2 stops27h 20mLufthansa

Thu 20/1117:30LHR - USM

2 stops20h 35mLufthansa

Deal found 8/7£756

Mon 17/1108:15USM - LGW

2 stops34h 25mEmirates

Sat 29/1109:40LGW - USM

2 stops19h 10mEmirates

Deal found 10/7£757

Mon 10/1108:55USM - LGW

1 stop28h 30mSingapore Airlines

Sat 22/1109:20LGW - USM

1 stop26h 10mSingapore Airlines

Deal found 9/7£800

Mon 3/1119:25USM - LHR

1 stop26h 55mSingapore Airlines

Sat 15/1122:05LHR - USM

1 stop26h 55mSingapore Airlines

Deal found 9/7£890

Mon 13/1016:25USM - LHR

1 stop20h 10mQantas Airways

Sat 25/1020:50LHR - USM

1 stop18h 15mQantas Airways

Deal found 9/7£897

Mon 20/1008:45USM - LHR

1 stop16h 30mThai Airways

Sat 1/1121:35LHR - USM

1 stop27h 35mThai Airways

Deal found 10/7£950

Mon 15/1215:50USM - LHR

2 stops21h 35mQatar Airways

Sat 27/1214:15LHR - USM

2 stops17h 40mQatar Airways

Deal found 9/7£957

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 11 July 2025.

Mon 3/1107:00USM - LGW

2 stops32h 35mMultiple Airlines

Sat 15/1110:30LGW - USM

2 stops27h 00mMultiple Airlines

Deal found 9/7£595

Mon 27/1009:20USM - LHR

2 stops19h 20mSWISS

Sat 8/1113:50LHR - USM

2 stops24h 15mSWISS

Deal found 10/7£709

Sun 16/1113:25USM - LHR

2 stops27h 20mLufthansa

Thu 20/1117:30LHR - USM

2 stops20h 35mLufthansa

Deal found 8/7£756

Mon 17/1108:15USM - LGW

2 stops34h 25mEmirates

Sat 29/1109:40LGW - USM

2 stops19h 10mEmirates

Deal found 10/7£757

Mon 10/1108:55USM - LGW

1 stop28h 30mSingapore Airlines

Sat 22/1109:20LGW - USM

1 stop26h 10mSingapore Airlines

Deal found 9/7£800

Mon 13/1016:25USM - LHR

1 stop20h 10mQantas Airways

Sat 25/1020:50LHR - USM

1 stop18h 15mQantas Airways

Deal found 9/7£897

Mon 20/1008:45USM - LHR

1 stop16h 30mThai Airways

Sat 1/1121:35LHR - USM

1 stop27h 35mThai Airways

Deal found 10/7£950

Mon 15/1215:50USM - LHR

2 stops21h 35mQatar Airways

Sat 27/1214:15LHR - USM

2 stops17h 40mQatar Airways

Deal found 9/7£957

Mon 24/1111:40USM - LCY

2 stops27h 30mKLM

Sat 6/1208:40LCY - USM

2 stops29h 25mKLM

Deal found 11/7£1,093

Mon 3/1107:00USM - LHR

2 stops33h 35mMultiple Airlines

Sat 15/1106:00LHR - USM

2 stops21h 50mMultiple Airlines

Deal found 10/7£610

Mon 27/1016:25USM - LGW

2 stops32h 25mSWISS

Sat 8/1118:40LGW - USM

2 stops19h 25mSWISS

Deal found 9/7£716

Mon 27/1016:25USM - LCY

2 stops23h 10mSWISS

Sat 8/1112:20LCY - USM

2 stops25h 45mSWISS

Deal found 10/7£734

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 11 July 2025.

Thu 14/811:45USM - LGW

2 stops25h 25mMultiple Airlines

Deal found 10/7£406

Tue 12/808:20USM - LHR

2 stops28h 05mQatar Airways

Deal found 10/7£411

Tue 12/819:00USM - LHR

3 stops30h 30mMultiple Airlines

Deal found 10/7£412

Tue 12/808:20USM - LGW

2 stops35h 05mQatar Airways

Deal found 10/7£414

Fri 5/908:45USM - LHR

1 stop16h 30mThai Airways

Deal found 9/7£444

Tue 12/813:30USM - LHR

2 stops29h 15mEtihad Airways

Deal found 10/7£496

Fri 8/808:45USM - LCY

3 stops30h 45mMultiple Airlines

Deal found 9/7£543

Mon 11/819:25USM - LHR

1 stop29h 55mEVA Air

Deal found 10/7£614

Sat 9/808:20USM - LHR

1 stop28h 15mQantas Airways

Deal found 11/7£641

Fri 5/916:25USM - LCY

2 stops25h 15mSWISS

Deal found 9/7£682

Tue 12/816:25USM - LCY

2 stops21h 45mLufthansa

Deal found 10/7£737

Fri 29/813:30USM - LHR

1 stop23h 00mBritish Airways

Deal found 9/7£777

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 3/11

07:00-08:35

2 stops32h 35m

London Gatwick

Sat 15/11

10:30-20:30

2 stops27h 00m

£595

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 3/11

07:00-09:35

2 stops33h 35m

London Heathrow

Sat 15/11

06:00-10:50

2 stops21h 50m

£610

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 27/10

09:20-21:40

2 stops19h 20m

London Heathrow

Sat 8/11

13:50-21:05

2 stops24h 15m

£709

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 27/10

16:25-17:50

2 stops32h 25m

London Gatwick

Sat 8/11

18:40-21:05

2 stops19h 25m

£716

Ko SamuiLondon

USM - LCY

USMLCY

Ko Samui

Mon 27/10

16:25-08:35

2 stops23h 10m

London City

Sat 8/11

12:20-21:05

2 stops25h 45m

£734

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 16/11

13:25-09:45

2 stops27h 20m

London Heathrow

Thu 20/11

17:30-21:05

2 stops20h 35m

£756

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 17/11

08:15-11:40

2 stops34h 25m

London Gatwick

Sat 29/11

09:40-11:50

2 stops19h 10m

£757

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 10/11

08:55-06:25

1 stop28h 30m

London Gatwick

Sat 22/11

09:20-18:30

1 stop26h 10m

£800

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 3/11

19:25-15:20

1 stop26h 55m

London Heathrow

Sat 15/11

22:05-08:00

1 stop26h 55m

£890

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 13/10

16:25-06:35

1 stop20h 10m

London Heathrow

Sat 25/10

20:50-21:05

1 stop18h 15m

£897

Flights are sorted by cheapest return flights first.

Deals found on 10/7

Showing 1-10 of 30 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 morning, which can drop the price by up to 11% versus a flight at midday.

Reviews of airlines servicing London

See what other customers who have flown with EVA Air, Emirates, andSingapore Airlines 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.

EVA Air

8.4

Very Good

1,215 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

EVA Air

8.4

Very Good

1,215 reviews

EVA Air

8.4

Very Good

1,215 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Emirates

8.1

Very Good

3,285 reviews

EVA Air

8.4

Very Good

1,215 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Singapore Airlines

8.1

Very Good

1,324 reviews

EVA Air

8.4

Very Good

1,215 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

KLM

7.8

Good

1,372 reviews

EVA Air

8.4

Very Good

1,215 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Thai Airways

7.7

Good

336 reviews

EVA Air

8.4

Very Good

1,215 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

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.
What are the cheapest airlines flying from Ko Samui to London round-trip?
Flying on SWISS is currently your cheapest option to London, with prices starting at £709. Additional return tickets that might be worth considering are offered by Lufthansa and Emirates, with the lowest prices starting at £756 and £757, respectively. You may be able to fly from Ko Samui to London for 23% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Ko Samui to London one-way?
The cheapet airlines for a one-way flight from Ko Samui to London are Qatar Airways (£411), Thai Airways (£444), and Etihad Airways (£496).
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.
What is the cheapest month to book a flight from Ko Samui to London?
Currently, January is the cheapest month in which you can book a flight from Ko Samui to London (average of £112). Flying from Ko Samui to London in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Hounslow

Croydon

Milton Keynes

Deal

Gatwick

Slough

Luton

Wembley

Crawley

Eastbourne

Ilford

Hayes

Ipswich

Folkestone

Southend-on-Sea

Watford

Winchester

Maidstone

Guildford

Chichester

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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 £406

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 14/8. 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 11 July 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 11 July 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 11 July 2025.

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 July 2025.

See what other customers who have flown with EVA Air, Emirates, andSingapore Airlines 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?

What are the cheapest airlines flying from Ko Samui to London round-trip?

What are the cheapest airlines to fly from Ko Samui to London one-way?

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?

What is the cheapest month to book a flight from Ko Samui to London?

Travelling to a place near Ko Samui?

Browse thousands of different options on Cheapflights for your next trip

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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 11 July 2025.