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 24h 05m. เอทิฮัดแอร์เวย์ provides one of the quickest options available for as low as ฿38,612. 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.

฿11,382+ 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.

Cheapest

Best

One-way

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 30 September 2026.

Fri 13/1107:00 -

2 stops21h 40m

Fri 20/1116:05 -

2 stops21h 20m

Deal found 29/9฿32,065

Tue 10/1117:05 -

2 stops25h 25m

Tue 17/1108:45 -

2 stops21h 45m

Deal found 26/9฿32,468

Thu 5/1119:00 -

2 stops24h 05m

Mon 9/1113:55 -

2 stops21h 30m

Deal found 28/9฿38,612

Thu 5/1107:00 -

2 stops21h 55m

Mon 9/1115:30 -

2 stops18h 30m

Deal found 25/9฿39,854

Tue 10/1107:55 -

1 stop18h 40m

Tue 17/1111:50 -

1 stop14h 30m

Deal found 26/9฿41,701

Fri 13/1119:10 -

1 stop18h 30m

Fri 20/1111:50 -

1 stop15h 45m

Deal found 29/9฿42,204

Thu 5/1107:00 -

1 stop19h 05m

Mon 9/1121:20 -

1 stop15h 30m

Deal found 29/9฿44,890

Find flight deals from Ko Samui to Heathrow

Round-trip from	฿32,065
One-way from	฿11,382
Popular in	April
Cheapest in	August
Average price	฿44,286

13/11-20/11
4 total stops
43h 00m total
Ko Samui to London

Search Deals

12/11-31/12
3 total stops
40h 50m total
Ko Samui to London

Search Deals

Highest demand for flights based on searches. 15% potential increase in price (฿279,559 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 8% potential price decrease (฿116,397 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

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

Mon 19/10

07:50-17:45

2 stops39h 55m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿12,524

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Sat 23/1

08:55-05:55

3 stops28h 00m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿15,411

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Wed 7/10

19:15-17:45

2 stops28h 30m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿15,881

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Mon 5/10

08:00-19:10

3 stops41h 10m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿15,881

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Tue 26/1

08:40-11:05

2 stops33h 25m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿16,452

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Fri 22/1

08:50-12:05

2 stops34h 15m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿18,567

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Tue 26/1

08:50-06:40

2 stops28h 50m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿19,138

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Thu 3/12

07:00-19:35

1 stop19h 35m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿20,011

Fastest return journey

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Thu 12/11

07:55-19:35

1 stop18h 40m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿20,045

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Fri 22/1

14:30-19:35

1 stop36h 05m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

฿21,455

Flights are sorted by cheapest return flights first.

Deals found on 27/9

Showing 1-10 of 16 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 24h 05m. เอทิฮัดแอร์เวย์ provides one of the quickest options available for as low as ฿38,612. 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 ฿11,382

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/11. 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 30 September 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 30 September 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 30 September 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 30 September 2026.

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 30 September 2026.

Search for one-way flight options from Ko Samui to Heathrow. Find affordable one-way fares based on user searches. Data last updated 30 September 2026.

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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.

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?

Browse thousands of different options on Cheapflights for your next trip

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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

Find flights from Ko Samui to Heathrow, based on your preferred cabin class, be it economy, premium economy, business, or first class.

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 30 September 2026.

Ko Samui and Heathrow flights

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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 30 September 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 30 September 2026.

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 30 September 2026.