Cheap flights from Heathrow to Koh Samui

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How to find the cheapest flight from
Heathrow (LHR) to Koh Samui (USM)

All the information you need to plan the best LHR to USM flight in 2021: compare Heathrow to Koh Samui flight prices with the expected peak season, weather and rainfall in Koh Samui.
LHR - USM
Price
£551 - £983
USM
Temperature
29 - 33 °C
USM
Rainfall
50 - 423 mm

Popular in

December

High demand for flights, 34% potential price rise

Cheapest in

May

Best time to find cheap flights, 15% potential price drop

Round-trip from

£551

From Heathrow to Koh Samui

One-way from

£374

One-way flight from Heathrow to Koh Samui

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
How far in advance should I book a flight from Heathrow to Koh Samui?

To save up to 0% on this flight, we recommend booking at least 13 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Heathrow to Koh Samui from £626 1-2 weeks out and tickets from £636 for flights departing within the next 72 hours.

What is the cheapest month to fly from Heathrow to Koh Samui?

May is one of the best times of the year to fly to Koh Samui from Heathrow. Prices for May average £639 per person but you can even find prices for as low as £492. The most expensive prices can be found in the month of December. Opting for a May flight can save you 49% on your journey compared to booking in May

Cheap flights from Heathrow to Koh Samui in June, July 2021

The best prices found for LHR to USM flights in June, July
15 Jul - 22 Jul
£570pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
USM
Koh Samui
USM
Koh Samui
Multiple Airlines
   
2 STOPS
LHR
London Heathrow
15 Jul - 22 Jul
£585pp
LHR
London Heathrow
Multiple airlines
     
3 STOPS
USM
Koh Samui
USM
Koh Samui
Multiple Airlines
     
3 STOPS
LHR
London Heathrow
15 Jun - 18 Jun
£692pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
USM
Koh Samui
USM
Koh Samui
Multiple Airlines
   
2 STOPS
LHR
London Heathrow

Heathrow to Koh Samui 2021 flight deals

Cheap flights to Koh Samui from Heathrow found for this year
13 Sep - 20 Sep
£491pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
USM
Koh Samui
USM
Koh Samui
Multiple Airlines
   
2 STOPS
LHR
London Heathrow
2 Dec - 16 Dec
£517pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
USM
Koh Samui
USM
Koh Samui
Multiple Airlines
   
2 STOPS
LHR
London Heathrow
12 Nov - 3 Dec
£520pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
USM
Koh Samui
USM
Koh Samui
Multiple Airlines
   
2 STOPS
LHR
London Heathrow

One-way flights to Koh Samui from Heathrow

The cheapest one-way flights from Heathrow to Koh Samui
06:50 - 04:40
Thai Airways
1 stop
14h 50m
LHR - USM
Thai Airways
£541
DreamWorldTravel
16:50 - 07:10
Multiple Airlines
2 stops
31h 20m
LHR - USM
Multiple Airlines
£374
Expedia
16:15 - 06:50
Multiple Airlines
3 stops
55h 35m
LHR - USM
Multiple Airlines
£429
Kiwi.com

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Heathrow</span> to <span class="emphasized">Koh Samui</span> flights.

Flight FAQs

From Heathrow to Koh Samui

Are flight prices decreasing from Heathrow to Koh Samui due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Heathrow and Koh Samui for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from London Heathrow to Koh Samui to control the spread of COVID-19?

New policies can now be found on Etihad Airways to help keep travellers safe while flying. Some of the new policies that have been implemented to accommodate travellers flying from London Heathrow to Koh Samui are improved sanitation, HEPA filters, mask requirements, socially-distanced seating (for a limited time), and pre-flight testing for antibodies and symptoms. Policies will vary by airline.

Which airlines flying from London Heathrow to Koh Samui have flexible cancellations due to COVID-19?

Due to the rapidly changing circumstances due to COVID-19, airlines like British Airways, EVA Air, and Thai Airways flying from London Heathrow to Koh Samui have implemented new flexible cancellation policies.

What airport do you fly into for flights to Koh Samui from London Heathrow?

Most people fly into Koh Samui (USM) if they book a flight to Koh Samui from London Heathrow. On average, Ko Samui has 0 inbound flights from London Heathrow per day from 14 airlines. Koh Samui is conveniently located just 2.1 mi from Koh Samui’s city centre.

Can I find flights from Heathrow to Koh Samui for under £496 on Cheapflights?

Yes, there are multiple flights from Heathrow to Koh Samui for under £496. The cheapest flight booked recently is on Multiple Airlines for just £491, but on average you can expect to pay £640.

Are there direct flights from Heathrow to Koh Samui for under £496 on Cheapflights?

There are no direct flights from Heathrow to Koh Samui, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.

Does it rain more in Heathrow or Koh Samui?

When travelling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in Heathrow is roughly less than Koh Samui. You can assume this to be the case over the next 19 days.

Is Heathrow weather warmer or cooler than Koh Samui?

Temperatures around the 33 °Cs can be experienced in May. The weather in Koh Samui is hotter than in Heathrow. Plan for potential changes in flight availability as peak weather approaches in this location.

How long does is the flight from Heathrow to Koh Samui?

There are many flights that can get you from Heathrow to Koh Samui in 14h 35m. Fly via Thai Airways or Etihad Airways to get the fastest option. Both multi-stop and direct flights can be found to your destination and back.

What are the cheapest airlines to flying from Heathrow to Koh Samui return?

Currently priced at £599, Etihad Airways will fly you from Heathrow to Koh Samui and back. In addition to Etihad Airways, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from EVA Air and Thai Airways - these airlines can fly you to your destination from £799 and £832, respectively. These flights start at 7% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from Heathrow to Koh Samui one-way?

£541 is the cheapest one-way deal found within the past few days, from Thai Airways.

Alternative routes for Heathrow to Koh Samui

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for Koh Samui

Things to know before you go - useful duration and weather info for your trip from Heathrow to Koh Samui.
Today's exchange rate
£1 = ฿43.86
Average temperature for June in Koh Samui
32.0 °C
Avg rainfall for June in Koh Samui
136.0 mm

Airports servicing London

Airports servicing Koh Samui

Top 10 airlines flying from Heathrow to Koh Samui

The chart below displays the airlines Cheapflights users travelling from Heathrow to Koh Samui choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Etihad Airways
£687 £771 No cancel fee 75%
Search Etihad Airways flights
Singapore Airlines
£667 £820 No cancel fee 81%
Search Singapore Airlines flights
KLM
£617 £840 No cancel fee 75%
Search KLM flights
Emirates
£731 £846 No cancel fee 75%
Search Emirates flights
EVA Air
£722 £908 No cancel fee 74%
Search EVA Air flights
British Airways
£741 £982 No cancel fee 70%
Search British Airways flights
Cathay Pacific
£780 £1,004 No cancel fee 72%
Search Cathay Pacific flights
Qantas Airways
£719 £1,005 No cancel fee 74%
Search Qantas Airways flights
Qatar Airways
£757 £1,014 No cancel fee 68%
Search Qatar Airways flights
Air France
£757 £1,068 No cancel fee 77%
Search Air France flights
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