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Cheap flights from Ko Samui to London from £272

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 14/5. 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
1 adult, Economy, 0 bags
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Find the cheapest flights from Ko Samui to London

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
08:40 - 07:00
USM
-
LHR
28h 20m
2 stops
Multiple Airlines Logo
09:30 - 18:50
LHR
-
USM
27h 20m
2 stops
£736Multiple Airlines
Sat, 9 May - Sat, 16 May
Multiple Airlines Logo
07:50 - 12:45
USM
-
LHR
34h 55m
2 stops
Multiple Airlines Logo
16:15 - 21:35
LHR
-
USM
23h 20m
2 stops
£741Multiple Airlines
Mon, 11 May - Mon, 18 May
Multiple Airlines Logo
13:30 - 06:55
USM
-
LHR
23h 25m
2 stops
Multiple Airlines Logo
22:00 - 13:45
LHR
-
USM
33h 45m
3 stops
£789Multiple Airlines
Mon, 11 May - Mon, 18 May
Multiple Airlines Logo
07:50 - 06:25
USM
-
LHR
28h 35m
3 stops
Multiple Airlines Logo
20:45 - 07:10
LHR
-
USM
28h 25m
2 stops
£854Multiple Airlines
Sat, 9 May - Sat, 16 May
Oman Air Logo
06:00 - 19:10
USM
-
LHR
19h 10m
2 stops
Oman Air Logo
08:25 - 14:45
LHR
-
USM
24h 20m
2 stops
£893Oman Air
Mon, 18 May - Mon, 8 Jun
EVA Air Logo
21:00 - 19:20
USM
-
LHR
28h 20m
1 stop
EVA Air Logo
21:35 - 21:35
LHR
-
USM
18h 00m
1 stop
£999EVA Air
Mon, 11 May - Mon, 18 May
Multiple Airlines Logo
15:50 - 06:55
USM
-
LHR
21h 05m
2 stops
Multiple Airlines Logo
21:35 - 20:30
LHR
-
USM
16h 55m
1 stop
£1,003Multiple Airlines
Mon, 11 May - Mon, 18 May
Multiple Airlines Logo
11:25 - 07:00
USM
-
LHR
25h 35m
2 stops
Multiple Airlines Logo
14:45 - 07:35
LHR
-
USM
34h 50m
3 stops
£1,013Multiple Airlines
Sun, 28 Jun - Sun, 12 Jul
Etihad Airways Logo
13:30 - 07:00
USM
-
LHR
23h 30m
2 stops
Etihad Airways Logo
09:30 - 11:05
LHR
-
USM
19h 35m
2 stops
£1,020Etihad Airways
Sat, 25 Jul - Sat, 8 Aug
Multiple Airlines Logo
19:00 - 22:00
USM
-
LHR
33h 00m
2 stops
Multiple Airlines Logo
08:25 - 16:30
LHR
-
USM
26h 05m
2 stops
£1,027Multiple Airlines
Sat, 25 Jul - Fri, 7 Aug

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
5 Apr
USM12:10Ko Samui
25h 25m
2 stops
LHR07:35London Heathrow
26 May
LHR09:00London Heathrow
19h 30m
2 stops
USM10:30Ko Samui
£908
Qatar Airways
5 Apr
USM12:10Ko Samui
25h 25m
2 stops
LHR07:35London Heathrow
26 May
LHR09:00London Heathrow
19h 30m
2 stops
USM10:30Ko Samui
£910
Qatar Airways
5 Apr
USM12:10Ko Samui
25h 25m
2 stops
LHR07:35London Heathrow
26 May
LHR09:00London Heathrow
19h 30m
2 stops
USM10:30Ko Samui
£913

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
11 May
USM21:00Ko Samui
28h 20m
1 stop
LHR19:20London Heathrow
18 May
LHR21:35London Heathrow
18h 00m
1 stop
USM21:35Ko Samui
£999
EVA Air
9 May
USM06:00Ko Samui
19h 20m
1 stop
LHR19:20London Heathrow
16 May
LHR21:35London Heathrow
14h 55m
1 stop
USM18:30Ko Samui
£1,190
EVA Air
5 Apr
USM08:30Ko Samui
16h 50m
1 stop
LHR19:20London Heathrow
24 May
LHR21:35London Heathrow
18h 00m
1 stop
USM21:35Ko Samui
£3,193

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 30 March 2026.
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

Cheapest return flight

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 9/5

08:40-07:00

2 stops28h 20m

London Heathrow

Sat 16/5

09:30-18:50

2 stops27h 20m

£736

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 11/5

07:50-12:45

2 stops34h 55m

London Heathrow

Mon 18/5

16:15-21:35

2 stops23h 20m

£741

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 11/5

13:30-06:55

2 stops23h 25m

London Heathrow

Mon 18/5

22:00-13:45

3 stops33h 45m

£789

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 9/5

07:50-06:25

3 stops28h 35m

London Heathrow

Sat 16/5

20:45-07:10

2 stops28h 25m

£854

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 18/5

06:00-19:10

2 stops19h 10m

London Heathrow

Mon 8/6

08:25-14:45

2 stops24h 20m

£893

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 11/5

21:00-19:20

1 stop28h 20m

London Heathrow

Mon 18/5

21:35-21:35

1 stop18h 00m

£999
Fastest return journey

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 11/5

15:50-06:55

2 stops21h 05m

London Heathrow

Mon 18/5

21:35-20:30

1 stop16h 55m

£1,003

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 28/6

11:25-07:00

2 stops25h 35m

London Heathrow

Sun 12/7

14:45-07:35

3 stops34h 50m

£1,013

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 25/7

13:30-07:00

2 stops23h 30m

London Heathrow

Sat 8/8

09:30-11:05

2 stops19h 35m

£1,020

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 25/7

19:00-22:00

2 stops33h 00m

London Heathrow

Fri 7/8

08:25-16:30

2 stops26h 05m

£1,027

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 £521. 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 £881.

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 £547. 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 £654 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?

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

Fastest flight time

19h 35m

Direct flights

None
The fastest flight from Ko Samui to London Heathrow Airport takes 19h 35m
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 19h 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
Milton Keynes
Luton
Gatwick
Stratford-upon-Avon
Slough
Maidstone
Northampton
Swindon
Southend-on-Sea
Wembley
Ipswich
Canterbury
Ilford
Guildford
Hayes
Chelmsford
Poole
Dover
Folkestone

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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