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Cheap flights from Ko Samui to London from £369

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ko Samui to London departing on 2/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags
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Find the cheapest flights from Ko Samui to London

Cheap return flights

Logo
07:00 - 09:35USM-LHR
33h 35m2 stops
Logo
06:00 - 10:50LHR-USM
21h 50m2 stops
£610
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Mon, 3 Nov - Sat, 15 Nov
Logo
07:00 - 09:20USM-LHR
33h 20m3 stops
Logo
06:00 - 18:30LHR-USM
29h 30m2 stops
£631
Find Deal
Mon, 3 Nov - Sat, 15 Nov
Logo
07:00 - 10:45USM-LHR
34h 45m3 stops
Logo
06:00 - 18:30LHR-USM
29h 30m2 stops
£642
Find Deal
Mon, 3 Nov - Sat, 15 Nov
Logo
15:50 - 18:25USM-LHR
33h 35m2 stops
Logo
06:00 - 08:00LHR-USM
19h 00m2 stops
£687
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Mon, 17 Nov - Sat, 29 Nov
SWISS Logo
09:20 - 21:40USM-LHR
19h 20m2 stops
SWISS Logo
13:50 - 21:05LHR-USM
24h 15m2 stops
£709SWISS
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Mon, 27 Oct - Sat, 8 Nov
SWISS Logo
08:45 - 21:45USM-LHR
19h 00m2 stops
SWISS Logo
20:05 - 21:05LHR-USM
42h 00m2 stops
£712SWISS
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Mon, 20 Oct - Sat, 1 Nov
Lufthansa Logo
13:25 - 09:45USM-LHR
27h 20m2 stops
Lufthansa Logo
17:30 - 21:05LHR-USM
20h 35m2 stops
£756Lufthansa
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Sun, 16 Nov - Thu, 20 Nov
Singapore Airlines Logo
19:25 - 15:20USM-LHR
26h 55m1 stop
Singapore Airlines Logo
10:55 - 18:30LHR-USM
24h 35m1 stop
£890Singapore Airlines
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Mon, 10 Nov - Sat, 22 Nov
Qantas Airways Logo
16:25 - 06:35USM-LHR
20h 10m1 stop
Qantas Airways Logo
20:50 - 21:05LHR-USM
18h 15m1 stop
£897Qantas Airways
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Mon, 13 Oct - Sat, 25 Oct
Qantas Airways Logo
16:25 - 06:15USM-LHR
20h 50m1 stop
Qantas Airways Logo
20:10 - 21:05LHR-USM
17h 55m1 stop
£905Qantas Airways
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Sun, 16 Nov - Thu, 20 Nov

SWISS flights from Ko Samui to London Heathrow Airport

Our best SWISS deals on Ko Samui to London Heathrow Airport flight tickets
SWISS
27 Oct
USM09:20Ko Samui
19h 20m
2 stops
LHR21:40London Heathrow
8 Nov
LHR13:50London Heathrow
24h 15m
2 stops
USM21:05Ko Samui
£709
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SWISS
20 Oct
USM08:45Ko Samui
19h 00m
2 stops
LHR21:45London Heathrow
1 Nov
LHR20:05London Heathrow
42h 00m
2 stops
USM21:05Ko Samui
£712
Find similar
SWISS
20 Oct
USM08:45Ko Samui
19h 00m
2 stops
LHR21:45London Heathrow
1 Nov
LHR20:05London Heathrow
42h 00m
2 stops
USM21:05Ko Samui
£770
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Qantas Airways flights from Ko Samui to London Heathrow Airport

Our best Qantas Airways deals on Ko Samui to London Heathrow Airport flight tickets
Qantas Airways
13 Oct
USM16:25Ko Samui
20h 10m
1 stop
LHR06:35London Heathrow
25 Oct
LHR20:50London Heathrow
18h 15m
1 stop
USM21:05Ko Samui
£897
Find similar
Qantas Airways
16 Nov
USM16:25Ko Samui
20h 50m
1 stop
LHR06:15London Heathrow
20 Nov
LHR20:10London Heathrow
17h 55m
1 stop
USM21:05Ko Samui
£905
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Qantas Airways
16 Nov
USM16:25Ko Samui
20h 50m
1 stop
LHR06:15London Heathrow
20 Nov
LHR20:10London Heathrow
17h 55m
1 stop
USM21:05Ko Samui
£908
Find similar

See travel insights to London from

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

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 Ko Samui and London Heathrow Airport?

What is the cheapest day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from Ko Samui is on a Friday. momondo users have found tickets for Friday departures for as low as £508. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Monday is £860.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from Ko Samui to London Heathrow Airport in the evening for as low as £534. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £638 on average. Flights to London Heathrow Airport from Ko Samui in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

As of July 2025, prices for Ko Samui to London Heathrow Airport flights are approximately 23% cheaper when compared to flights at the same time last year.

When to book flights from Ko Samui to London Heathrow Airport

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

Cheap Ko Samui to London Heathrow Airport (USM to LHR) flight deals and tips

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

Best price found

£369

Fastest flight time

16h 00m

Direct flights

None
The best one-way flight to London Heathrow Airport from Ko Samui in the past 72 hours is £369. The best return flight deal from Ko Samui to London Heathrow Airport found on momondo in the last 72 hours is £610.
The fastest flight from Ko Samui to London Heathrow Airport takes 16h 00m
There are no direct flights from Ko Samui to London Heathrow Airport. Popular non-direct route for this connection is Ko Samui Airport - London Heathrow Airport.
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  • How far is Ko Samui to London Heathrow by plane?

    The straight-line distance from Ko Samui to London Heathrow is 6145.4 mi. Typically, this will take 16h 30m by plane in normal conditions.

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

    Prices for flights from Ko Samui Airport to London Heathrow Airport are refreshed on a daily basis.

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ko Samui Airport to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ko Samui to London. momondo saves you time and could save you money on your trip.

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

Yes. momondo enables you to select and highlight flights to London from Ko Samui with this policy.

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

Once you have performed a search for Ko Samui to London 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 Ko Samui to London right now. Can momondo alert me if prices change?

Price alerts on flights to London from Ko Samui are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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