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Cheap flights from Ko Samui to London from £343

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 30/1. 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
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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
19:00 - 15:55USM-LHR
27h 55m2 stops
Multiple Airlines Logo
06:40 - 21:20LHR-USM
31h 40m3 stops
£938Multiple Airlines
Find Deal
Sa, 27 Dez - Sa, 3 Jan
Oman Air Logo
14:05 - 05:55USM-LHR
22h 50m2 stops
Oman Air Logo
08:25 - 10:35LHR-USM
19h 10m2 stops
£1,097Oman Air
Find Deal
Sa, 27 Dez - Sa, 3 Jan
Multiple Airlines Logo
10:00 - 19:35USM-LHR
16h 35m1 stop
Multiple Airlines Logo
21:35 - 08:25LHR-USM
27h 50m2 stops
£1,135Multiple Airlines
Find Deal
Sa, 27 Dez - Sa, 3 Jan
Multiple Airlines Logo
07:55 - 19:05USM-LHR
18h 10m1 stop
Multiple Airlines Logo
21:20 - 20:25LHR-USM
16h 05m1 stop
£1,220Multiple Airlines
Find Deal
Sa, 27 Dez - Sa, 3 Jan

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 14 November 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

Sa 27/12

19:00-15:55

2 stops27h 55m

London Heathrow

Sa 3/1

06:40-21:20

3 stops31h 40m

£938

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sa 27/12

14:05-05:55

2 stops22h 50m

London Heathrow

Sa 3/1

08:25-10:35

2 stops19h 10m

£1,097

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sa 27/12

10:00-19:35

1 stop16h 35m

London Heathrow

Sa 3/1

21:35-08:25

2 stops27h 50m

£1,135

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sa 27/12

07:55-19:05

1 stop18h 10m

London Heathrow

Sa 3/1

21:20-20:25

1 stop16h 05m

£1,220

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fr 30/1

19:00-21:15

3 stops33h 15m

£343

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

So 15/2

12:25-21:15

3 stops39h 50m

£347

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Do 12/2

08:50-14:30

3 stops36h 40m

£349

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fr 30/1

07:15-12:05

2 stops35h 50m

£362

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

So 15/2

08:55-21:15

2 stops43h 20m

£372

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Do 12/2

08:15-06:40

2 stops29h 25m

£377

Flights are sorted by cheapest return flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
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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 £525. 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 £888.

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 £552. 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 £659 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 1% on your flight if you consider stops on a Ko Samui to London Heathrow Airport flight.

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.
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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 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?

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Ipswich
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Colchester
Chelmsford
Hayes

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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