What is the cheapest airline that flies from London to Ko Samui?

Etihad Airways, SWISS, and EVA Air are the most popular carriers operating from London to Ko Samui

Which airlines fly to Ko Samui?

EVA Air, Thai Airways and Singapore Airlines are the top three most popular airlines that fly to Ko Samui from London according to our data. EVA Air is the first choice among our users, with 47% of people opting to fly with this airline when travelling to Ko Samui. Keep in mind that there are 13 different airlines that fly to Ko Samui on a routine basis, so you have a few additional options to choose from.

Which airport is the most popular for stopovers for flights between London and Ko Samui?

Bangkok (BKK) was the most common stop: 83% of momondo users choosing one-stop flights on this route connected there.

Which stopover airport offers the lowest fares from London to Ko Samui?

Flights via Shanghai (PVG) offer the lowest average return price of £494.

Which stopover airport has the shortest travel time from London to Ko Samui?

Flights connecting via Kuwait City (KWI) have the shortest average one-way travel time: 15h 20m.

Which stopover airport has the shortest connection time from London to Ko Samui?

Bangkok (BKK) has the shortest average stopover time for this route: 2h 31m.

When did momondo last update prices for flights from London to Ko Samui Airport?

Prices for flights from London to Ko Samui Airport are updated daily.

How many operators does momondo search for flights from London to Ko Samui Airport?

As of September 2025, there are 13 operators available to choose from for flights from London to Ko Samui Airport.

How old do you have to be to fly from London to Ko Samui Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London to Ko Samui Airport.

What documentation or ID do you need to fly to Ko Samui Airport?

The travel and health documents you'll need for your trip to Ko Samui Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ko Samui Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

£325 Cheap Flights from London to Ko Samui in 2025

Q: What is the typical price of a round-trip flight between London and Ko Samui?

Prices are currently low for flights on this route. Typical prices usually range from £726 to £832. The lowest price recently found on this route was £696.

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Find the cheapest flights from London to Ko Samui

Round-trip

One-way

Last minute

Cheap return flights

09:15 - 21:05LCY-USM

28h 50m2 stops

13:25 - 17:40USM-LCY

35h 15m2 stops

£696

Find Deal

Tue, 18 Nov - Wed, 3 Dec

17:45 - 21:05LCY-USM

20h 20m2 stops

13:25 - 16:40USM-LCY

34h 15m2 stops

£697

Find Deal

Tue, 18 Nov - Wed, 3 Dec

21:45 - 08:00LHR-USM

27h 15m1 stop

12:00 - 15:20USM-LHR

34h 20m1 stop

£768Singapore Airlines

Find Deal

Tue, 4 Nov - Thu, 20 Nov

21:45 - 08:00LHR-USM

27h 15m1 stop

19:45 - 15:20USM-LHR

26h 35m1 stop

£769Singapore Airlines

Find Deal

Tue, 11 Nov - Tue, 25 Nov

11:50 - 15:35LHR-USM

20h 45m1 stop

13:45 - 06:40USM-LHR

23h 55m1 stop

£790Thai Airways

Find Deal

Tue, 28 Oct - Wed, 26 Nov

21:35 - 07:15LHR-USM

26h 40m1 stop

07:00 - 06:40USM-LHR

30h 40m1 stop

£801Thai Airways

Find Deal

Mon, 3 Nov - Mon, 1 Dec

21:35 - 18:30LHR-USM

14h 55m1 stop

08:45 - 19:20USM-LHR

16h 35m1 stop

£805EVA Air

Find Deal

Wed, 8 Oct - Fri, 24 Oct

21:35 - 18:30LHR-USM

14h 55m1 stop

08:00 - 19:20USM-LHR

17h 20m1 stop

£806EVA Air

Find Deal

Sun, 28 Sep - Fri, 17 Oct

21:15 - 20:15LGW-USM

16h 00m1 stop

19:10 - 05:30USM-LGW

17h 20m1 stop

£816British Airways

Find Deal

Tue, 18 Nov - Wed, 3 Dec

21:15 - 20:15LGW-USM

16h 00m1 stop

18:35 - 05:30USM-LGW

17h 55m1 stop

£817British Airways

Find Deal

Tue, 18 Nov - Wed, 3 Dec

KLM flights from London to Ko Samui

Our best KLM deals on London to Ko Samui flight tickets

KLM

18 Sept

LHR14:45London Heathrow

21h 30m

2 stops

USM18:15Ko Samui

29 Sept

USM08:00Ko Samui

18h 55m

2 stops

LHR20:55London Heathrow

£735

Find similar

KLM

18 Sept

LHR14:45London Heathrow

21h 30m

2 stops

USM18:15Ko Samui

29 Sept

USM08:45Ko Samui

18h 10m

2 stops

LHR20:55London Heathrow

£765

Find similar

KLM

18 Sept

LCY08:40London City

27h 35m

2 stops

USM18:15Ko Samui

29 Sept

USM08:45Ko Samui

38h 35m

2 stops

LCY17:20London City

£823

Find similar

Qatar Airways flights from London to Ko Samui

Our best Qatar Airways deals on London to Ko Samui flight tickets

Qatar Airways

18 Sept

LGW09:00London Gatwick

20h 55m

2 stops

USM11:55Ko Samui

29 Sept

USM08:00Ko Samui

35h 25m

2 stops

LGW13:25London Gatwick

£750

Find similar

Qatar Airways

18 Nov

LGW08:40London Gatwick

19h 00m

2 stops

USM10:40Ko Samui

3 Dec

USM17:05Ko Samui

19h 50m

2 stops

LGW05:55London Gatwick

£797

Find similar

Qatar Airways

28 Sept

LGW14:55London Gatwick

37h 35m

2 stops

USM10:30Ko Samui

17 Oct

USM19:00Ko Samui

41h 40m

2 stops

LGW06:40London Gatwick

£811

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LondonKo Samui

LCY - USM

LCYUSM

London City

Tue 18/11

09:15-21:05

2 stops28h 50m

Ko Samui

Wed 3/12

13:25-17:40

2 stops35h 15m

£696

LondonKo Samui

LCY - USM

LCYUSM

London City

Tue 18/11

17:45-21:05

2 stops20h 20m

Ko Samui

Wed 3/12

13:25-16:40

2 stops34h 15m

£697

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 4/11

21:45-08:00

1 stop27h 15m

Ko Samui

Thu 20/11

12:00-15:20

1 stop34h 20m

£768

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 11/11

21:45-08:00

1 stop27h 15m

Ko Samui

Tue 25/11

19:45-15:20

1 stop26h 35m

£769

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 28/10

11:50-15:35

1 stop20h 45m

Ko Samui

Wed 26/11

13:45-06:40

1 stop23h 55m

£790

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 3/11

21:35-07:15

1 stop26h 40m

Ko Samui

Mon 1/12

07:00-06:40

1 stop30h 40m

£801

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Wed 8/10

21:35-18:30

1 stop14h 55m

Ko Samui

Fri 24/10

08:45-19:20

1 stop16h 35m

£805

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sun 28/9

21:35-18:30

1 stop14h 55m

Ko Samui

Fri 17/10

08:00-19:20

1 stop17h 20m

£806

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Tue 18/11

21:15-20:15

1 stop16h 00m

Ko Samui

Wed 3/12

19:10-05:30

1 stop17h 20m

£816

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Tue 18/11

21:15-20:15

1 stop16h 00m

Ko Samui

Wed 3/12

18:35-05:30

1 stop17h 55m

£817

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from London to Ko Samui

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Stopovers

What is the typical price of a round-trip flight between London and Ko Samui?

What is the cheapest month to fly to Ko Samui?

The cheapest month to fly to Ko Samui from London is in September. Flight prices, which tend to average around £789, are often lower during this time because this is during the off-season. If you don’t want to visit Ko Samui in September, then you should wait until May to fly from London, when ticket prices are also cheap, with an average price of £791.

What is the cheapest day to depart on your flight to Ko Samui?

According to our data, Wednesday is the cheapest day to fly to Ko Samui from London. The lowest ticket price found for a Wednesday departure recently was £488. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Ko Samui on Sunday is £832.

What is the cheapest time of day to depart on your flight to Ko Samui?

Our most recent data shows that the best time of day to fly to Ko Samui is in the afternoon. Flights from London to Ko Samui during this time can be as low as £494. Flights at midday are often more expensive, with an average ticket price of £803.

How far in advance should I book a flight to Ko Samui?

You are more likely to see cheaper flights to Ko Samui from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Ko Samui for around £908 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ko Samui from London for as low as £785 on momondo.

How have London to Ko Samui flight prices changed over time?

As of September 2025, prices for London to Ko Samui flights are approximately 10% cheaper when compared to flights at the same time last year.

When to book flights from London to Ko Samui

Are you open to changing your travel dates? Check out the ideal times to fly from London to Ko Samui according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap London to Ko Samui (LON to USM) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Ko Samui

Direct flights	None

There are no direct flights from London to Ko Samui. There are no popular flight routes from London to Ko Samui.

Search flight deals

How far is London to Ko Samui by plane?
London and Ko Samui are 6131.1 mi apart from one another. In terms of flight time, this usually takes a little over 14h 55m.
When did momondo last update prices for flights from London to Ko Samui Airport?
Prices for flights from London to Ko Samui Airport are updated daily.
How many operators does momondo search for flights from London to Ko Samui Airport?
As of September 2025, there are 13 operators available to choose from for flights from London to Ko Samui Airport.
How old do you have to be to fly from London to Ko Samui Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London to Ko Samui Airport.
What documentation or ID do you need to fly to Ko Samui Airport?
The travel and health documents you'll need for your trip to Ko Samui Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ko Samui Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from London to Ko Samui?
momondo data reveals that the most frequently booked airline on the route from London to Ko Samui is EVA Air, representing 38% of all bookings. The subsequent popular airlines are Thai Airways at 29%, British Airways at 11%, and Singapore Airlines at 10%.

Best airlines flying from London to Ko Samui

Compare and see reviews for airlines that fly from London to Ko Samui with momondo

Airline	Rating	Free Cancellation	Price
Bangkok Airways	PriceFrom £111	Free Cancellation	Rating 8.0 113 reviews	Search Bangkok Airways flights
Austrian Airlines	PriceFrom £594	Free Cancellation	Rating 7.6 850 reviews	Search Austrian Airlines flights
SWISS	PriceFrom £603	Free Cancellation	Rating 7.5 1,731 reviews	Search SWISS flights
Emirates	PriceFrom £617	Free Cancellation	Rating 8.1 3,334 reviews	Search Emirates flights
KLM	PriceFrom £628	Free Cancellation	Rating 7.8 1,385 reviews	Search KLM flights
Lufthansa	PriceFrom £630	Free Cancellation	Rating 6.8 7,409 reviews	Search Lufthansa flights
Air France	PriceFrom £653	Free Cancellation	Rating 7.4 1,469 reviews	Search Air France flights
Etihad Airways	PriceFrom £663	Free Cancellation	Rating 7.4 1,250 reviews	Search Etihad Airways flights
EVA Air	PriceFrom £725	Free Cancellation	Rating 8.4 1,236 reviews	Search EVA Air flights
British Airways	PriceFrom £734	Free Cancellation	Rating 6.6 7,361 reviews	Search British Airways flights

Ko Pha Ngan

Ko Tao

Khanom

Why use momondo?

Why should I use momondo to find a flight deal from London to Ko Samui?

Finding the right flight to Ko Samui from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Ko Samui quick and easy, saving you time and money.

Can I find flights from London to Ko Samui with flexible booking policies on momondo?

Yes. All flights to Ko Samui from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from London to Ko Samui?

Once you have performed a search for London to Ko Samui flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from London to Ko Samui right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Ko Samui from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Ko Samui trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Start using Trips

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Cheap flights from London to Ko Samui from £325

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Ko Samui departing on 3/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from London to Ko Samui

Cheap return flights

Cheap one-way flights

Cheap last-minute flights

KLM flights from London to Ko Samui

Our best KLM deals on London to Ko Samui flight tickets

Qatar Airways flights from London to Ko Samui

Our best Qatar Airways deals on London to Ko Samui flight tickets

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

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How to get the cheapest flight ticket from London to Ko Samui

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between London and Ko Samui?

What is the cheapest month to fly to Ko Samui?

What is the cheapest day to depart on your flight to Ko Samui?

What is the cheapest time of day to depart on your flight to Ko Samui?

Our most recent data shows that the best time of day to fly to Ko Samui is in the afternoon. Flights from London to Ko Samui during this time can be as low as £494. Flights at midday are often more expensive, with an average ticket price of £803.

How far in advance should I book a flight to Ko Samui?

How have London to Ko Samui flight prices changed over time?

As of September 2025, prices for London to Ko Samui flights are approximately 10% cheaper when compared to flights at the same time last year.

What is the cheapest airline that flies from London to Ko Samui?

Etihad Airways, SWISS, and EVA Air are the most popular carriers operating from London to Ko Samui

Which airlines fly to Ko Samui?

Which airport is the most popular for stopovers for flights between London and Ko Samui?

Bangkok (BKK) was the most common stop: 83% of momondo users choosing one-stop flights on this route connected there.

Which stopover airport offers the lowest fares from London to Ko Samui?

Flights via Shanghai (PVG) offer the lowest average return price of £494.

Which stopover airport has the shortest travel time from London to Ko Samui?

Flights connecting via Kuwait City (KWI) have the shortest average one-way travel time: 15h 20m.

Which stopover airport has the shortest connection time from London to Ko Samui?

Bangkok (BKK) has the shortest average stopover time for this route: 2h 31m.

When to book flights from London to Ko Samui

Cheap London to Ko Samui (LON to USM) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Ko Samui

Direct flights

How far is London to Ko Samui by plane?

When did momondo last update prices for flights from London to Ko Samui Airport?

How many operators does momondo search for flights from London to Ko Samui Airport?

How old do you have to be to fly from London to Ko Samui Airport?

What documentation or ID do you need to fly to Ko Samui Airport?

What is the most popular airline from London to Ko Samui?

Best airlines flying from London to Ko Samui

Compare and see reviews for airlines that fly from London to Ko Samui with momondo

Travelling to a place near Ko Samui?

Why use momondo?

Why should I use momondo to find a flight deal from London to Ko Samui?

Can I find flights from London to Ko Samui with flexible booking policies on momondo?

How can momondo help me find flights from London to Ko Samui?

I’m not ready to book a flight from London to Ko Samui right now. Can momondo alert me if prices change?

An easier way to manage your Ko Samui trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Thailand

Airports servicing Thailand