How long is the flight from Ko Samui to London Heathrow Airport?

A quick flight from Ko Samui to London Heathrow Airport can take about 22h 45m. เอทิฮัดแอร์เวย์ provides one of the quickest options available for as low as ฿40,184. Airlines will cover a distance of 9888 km.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

What is the cheapest time of day to fly from USM to LHR?

When flying from Ko Samui to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Most people fly from Ko Samui (USM) if they book a flight from Ko Samui to London Heathrow. On average, Ko Samui has 0 outbound flights to London Heathrow per day from 0 airlines. Ko Samui is conveniently located just 3.3 km from Ko Samui’s city centre.

Can I find deals for flights from Ko Samui to Heathrow that include hotel bookings?

Yes. In addition to deals on Ko Samui to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Ko Samui to Heathrow?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ko Samui to Heathrow.

Can I find deals for business class flights from Ko Samui to Heathrow?

Yes. Cheapflights offers flight deals from Ko Samui to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

฿12,434+ Cheap Flights from Ko Samui to London Heathrow Airport

Cheap flight deals from Ko Samui to Heathrow

Enter your travel dates to find the best prices.

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Cheapest flights from Ko Samui to Heathrow
Explore the most affordable flight options available from Ko Samui to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 November 2026.

Tue 8/1221:30 -

2 stops28h 50m

Mon 4/122:00 -

2 stops25h 55m

Deal found 8/11฿33,113

Wed 23/1207:00 -

2 stops30h 35m

Wed 30/1220:30 -

3 stops32h 25m

Deal found 8/11฿37,067

Thu 17/1214:05 -

2 stops23h 30m

Wed 20/114:15 -

2 stops34h 55m

Deal found 8/11฿37,838

Mon 21/1211:35 -

2 stops26h 05m

Mon 28/1210:00 -

3 stops28h 20m

Deal found 6/11฿39,782

Wed 25/1120:20 -

2 stops22h 45m

Sun 29/1108:40 -

2 stops18h 55m

Deal found 4/11฿40,184

Tue 1/1218:15 -

2 stops27h 15m

Mon 28/1208:30 -

2 stops21h 05m

Deal found 4/11฿42,698

Find flight deals from Ko Samui to Heathrow

Round-trip from	฿33,113
One-way from	฿12,434

8/12-4/1
4 total stops
54h 45m total
Ko Samui to London

Search Deals

5/12-31/12
2 total stops
45h 35m total
Ko Samui to London

Search Deals

Cheapflights Fare Finder

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 Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Fri 15/1

08:55-07:00

3 stops29h 05m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿16,724

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Fri 22/1

19:00-12:05

2 stops24h 05m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿19,103

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Tue 26/1

16:30-12:05

2 stops26h 35m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿19,640

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Sat 14/11

21:30-12:15

2 stops21h 45m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿19,740

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Tue 22/12

07:55-19:05

1 stop18h 10m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿21,516

Fastest return journey

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Sat 26/12

08:35-19:05

1 stop17h 30m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿21,516

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Sun 10/1

15:35-07:25

2 stops46h 50m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿22,187

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Wed 30/12

16:40-06:40

2 stops21h 00m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿23,393

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Sat 9/1

21:10-07:30

2 stops41h 20m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿23,862

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Fri 22/1

08:30-19:05

1 stop17h 35m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿27,315

Flights are sorted by cheapest return flights first.

Deals found on 6/11

Showing 1-10 of 19 resultsSorted by cheapest first

Best time to book a flight from Ko Samui to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Ko Samui with our price prediction graph.

USM-LHR

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

What airport do you fly from for flights from Ko Samui to London Heathrow?
Most people fly from Ko Samui (USM) if they book a flight from Ko Samui to London Heathrow. On average, Ko Samui has 0 outbound flights to London Heathrow per day from 0 airlines. Ko Samui is conveniently located just 3.3 km from Ko Samui’s city centre.
How long is the flight from Ko Samui to London Heathrow Airport?
A quick flight from Ko Samui to London Heathrow Airport can take about 22h 45m. เอทิฮัดแอร์เวย์ provides one of the quickest options available for as low as ฿40,184. Airlines will cover a distance of 9888 km.
Can I find deals for flights from Ko Samui to Heathrow that include hotel bookings?
Yes. In addition to deals on Ko Samui to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Ko Samui to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ko Samui to Heathrow.
Can I find deals for business class flights from Ko Samui to Heathrow?
Yes. Cheapflights offers flight deals from Ko Samui to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Can Cheapflights notify me if prices for flights from Ko Samui to Heathrow become cheaper?

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Cheap flights from Ko Samui to London Heathrow Airport from ฿12,434

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ko Samui to Heathrow

Cheapest flights from Ko Samui to HeathrowExplore the most affordable flight options available from Ko Samui to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 November 2026.

Explore the most affordable flight options available from Ko Samui to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 November 2026.

Best flights from Ko Samui to HeathrowDiscover carefully curated flight deals from Ko Samui to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 9 November 2026.

Discover carefully curated flight deals from Ko Samui to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 9 November 2026.

Last-minute flights from Ko Samui to HeathrowDiscover last-minute flight deals from Ko Samui to Heathrow. Data last updated 9 November 2026 and is based on user searches.

Discover last-minute flight deals from Ko Samui to Heathrow. Data last updated 9 November 2026 and is based on user searches.

One-way flights from Ko Samui to HeathrowSearch for one-way flight options from Ko Samui to Heathrow. Find affordable one-way fares based on user searches. Data last updated 9 November 2026.

Search for one-way flight options from Ko Samui to Heathrow. Find affordable one-way fares based on user searches. Data last updated 9 November 2026.

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Best time to book a flight from Ko Samui to Heathrow

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Related info for your journey

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

How long is the flight from Ko Samui to London Heathrow Airport?

Can I find deals for flights from Ko Samui to Heathrow that include hotel bookings?

How can I find direct flights from Ko Samui to Heathrow?

Can I find deals for business class flights from Ko Samui to Heathrow?

Travelling to a place near London Heathrow Airport?

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Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ko Samui to Heathrow

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

Complete your trip

Complete your trip to Heathrow by adding a car rental and/or hotel reservation to your travel itinerary.

Direct flights to England

Book a non-stop flight to one of these other cities located in England.

Search flights from Ko Samui to Heathrow by cabin class

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Other flights to Heathrow

Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 9 November 2026.

Ko Samui and Heathrow flights

Browse other Ko Samui and Heathrow flight options. Last updated on 9 November 2026.

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Can Cheapflights find flights from Ko Samui to Heathrow with no change fees?

Can Cheapflights notify me if prices for flights from Ko Samui to Heathrow become cheaper?

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Cheapest flights from Ko Samui to Heathrow
Explore the most affordable flight options available from Ko Samui to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 November 2026.

Best flights from Ko Samui to Heathrow
Discover carefully curated flight deals from Ko Samui to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 9 November 2026.

Last-minute flights from Ko Samui to Heathrow
Discover last-minute flight deals from Ko Samui to Heathrow. Data last updated 9 November 2026 and is based on user searches.

One-way flights from Ko Samui to Heathrow
Search for one-way flight options from Ko Samui to Heathrow. Find affordable one-way fares based on user searches. Data last updated 9 November 2026.