Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Ko Samui to London from £295

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 3/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Ko Samui to London

Cheap return flights

Multiple Airlines Logo
07:00 - 05:35USM-LHR
29h 35m2 stops
Multiple Airlines Logo
10:25 - 15:40LHR-USM
22h 15m2 stops
£729Multiple Airlines
Find Deal
Mon, 10 Nov - Fri, 28 Nov
Etihad Airways Logo
13:25 - 06:40USM-LHR
24h 15m2 stops
Etihad Airways Logo
19:20 - 13:05LHR-USM
34h 45m2 stops
£733Etihad Airways
Find Deal
Fri, 7 Nov - Thu, 27 Nov
SWISS Logo
09:35 - 21:40USM-LHR
19h 05m2 stops
SWISS Logo
09:00 - 10:40LHR-USM
18h 40m2 stops
£742SWISS
Find Deal
Sun, 9 Nov - Fri, 28 Nov
SWISS Logo
09:35 - 21:40USM-LHR
19h 05m2 stops
SWISS Logo
13:45 - 15:35LHR-USM
18h 50m2 stops
£765SWISS
Find Deal
Sun, 9 Nov - Thu, 27 Nov
Gulf Air Logo
10:00 - 06:35USM-LHR
27h 35m2 stops
Gulf Air Logo
21:50 - 12:35LHR-USM
31h 45m2 stops
£825Gulf Air
Find Deal
Tue, 11 Nov - Mon, 1 Dec
Gulf Air Logo
13:55 - 06:35USM-LHR
23h 40m2 stops
Gulf Air Logo
09:30 - 15:40LHR-USM
23h 10m2 stops
£859Gulf Air
Find Deal
Tue, 11 Nov - Tue, 25 Nov
EVA Air Logo
08:30 - 19:05USM-LHR
17h 35m1 stop
EVA Air Logo
21:20 - 20:25LHR-USM
16h 05m1 stop
£878EVA Air
Find Deal
Wed, 29 Oct - Wed, 5 Nov
Qatar Airways Logo
18:15 - 12:10USM-LHR
24h 55m2 stops
Qatar Airways Logo
08:25 - 11:55LHR-USM
20h 30m2 stops
£930Qatar Airways
Find Deal
Thu, 13 Nov - Thu, 27 Nov
Qatar Airways Logo
18:15 - 12:10USM-LHR
24h 55m2 stops
Qatar Airways Logo
08:40 - 09:20LHR-USM
17h 40m2 stops
£944Qatar Airways
Find Deal
Thu, 13 Nov - Tue, 25 Nov
EVA Air Logo
08:30 - 19:05USM-LHR
17h 35m1 stop
EVA Air Logo
21:20 - 20:15LHR-USM
15h 55m1 stop
£952EVA Air
Find Deal
Fri, 7 Nov - Wed, 26 Nov

EVA Air flights from Ko Samui to London Heathrow Airport

Our best EVA Air deals on Ko Samui to London Heathrow Airport flight tickets
EVA Air
29 Oct
USM08:30Ko Samui
17h 35m
1 stop
LHR19:05London Heathrow
5 Nov
LHR21:20London Heathrow
16h 05m
1 stop
USM20:25Ko Samui
£878
Find similar
EVA Air
7 Nov
USM08:30Ko Samui
17h 35m
1 stop
LHR19:05London Heathrow
26 Nov
LHR21:20London Heathrow
15h 55m
1 stop
USM20:15Ko Samui
£952
Find similar
EVA Air
7 Nov
USM07:55Ko Samui
18h 10m
1 stop
LHR19:05London Heathrow
27 Nov
LHR21:20London Heathrow
15h 55m
1 stop
USM20:15Ko Samui
£986
Find similar

Qatar Airways flights from Ko Samui to London Heathrow Airport

Our best Qatar Airways deals on Ko Samui to London Heathrow Airport flight tickets
Qatar Airways
13 Nov
USM18:15Ko Samui
24h 55m
2 stops
LHR12:10London Heathrow
27 Nov
LHR08:25London Heathrow
20h 30m
2 stops
USM11:55Ko Samui
£930
Find similar
Qatar Airways
13 Nov
USM18:15Ko Samui
24h 55m
2 stops
LHR12:10London Heathrow
25 Nov
LHR08:40London Heathrow
17h 40m
2 stops
USM09:20Ko Samui
£944
Find similar
Qatar Airways
10 Oct
USM13:30Ko Samui
22h 55m
2 stops
LHR06:25London Heathrow
20 Oct
LHR15:05London Heathrow
21h 10m
2 stops
USM18:15Ko Samui
£944
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Ko Samui to London Heathrow Airport 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, momondo users made 279,928 searches. Data last updated 17 September 2025.
Use the filters below to find and compare flights from Ko Samui to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 10/11

07:00-05:35

2 stops29h 35m

London Heathrow

Fri 28/11

10:25-15:40

2 stops22h 15m

£729

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fri 7/11

13:25-06:40

2 stops24h 15m

London Heathrow

Thu 27/11

19:20-13:05

2 stops34h 45m

£733

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 9/11

09:35-21:40

2 stops19h 05m

London Heathrow

Fri 28/11

09:00-10:40

2 stops18h 40m

£742

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 9/11

09:35-21:40

2 stops19h 05m

London Heathrow

Thu 27/11

13:45-15:35

2 stops18h 50m

£765

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 11/11

10:00-06:35

2 stops27h 35m

London Heathrow

Mon 1/12

21:50-12:35

2 stops31h 45m

£825

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 11/11

13:55-06:35

2 stops23h 40m

London Heathrow

Tue 25/11

09:30-15:40

2 stops23h 10m

£859

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 29/10

08:30-19:05

1 stop17h 35m

London Heathrow

Wed 5/11

21:20-20:25

1 stop16h 05m

£878

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 13/11

18:15-12:10

2 stops24h 55m

London Heathrow

Thu 27/11

08:25-11:55

2 stops20h 30m

£930

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 13/11

18:15-12:10

2 stops24h 55m

London Heathrow

Tue 25/11

08:40-09:20

2 stops17h 40m

£944

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fri 7/11

08:30-19:05

1 stop17h 35m

London Heathrow

Wed 26/11

21:20-20:15

1 stop15h 55m

£952

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 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 £506. 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 £857.

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 £532. 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 £636 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.

Can stopping save me money on Ko Samui to London Heathrow Airport flights?

You could potentially save up to 3% on your flight if you consider stops on a Ko Samui to London Heathrow Airport flight.

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

As of September 2025, prices for Ko Samui to London Heathrow Airport flights are approximately 47% more expensive 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

Direct flights

None
There are no direct flights from Ko Samui to London Heathrow Airport. There are no popular flight routes from Ko Samui to London Heathrow Airport.
Search flight deals

  • 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 35m 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.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Luton
Milton Keynes
Maidstone
Gatwick
Slough
Northampton
Swindon
Canterbury
Stratford-upon-Avon
Southend-on-Sea
Ipswich
Ilford
Guildford
Swanage
Poole
Colchester
Worthing
Salisbury
Chelmsford

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.

An easier way to manage your London Heathrow Airport 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
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Fri 17/10
Fri 24/10
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to London