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Cheap flights from Ko Samui to London Heathrow Airport from £279

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/11. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LHR
18 Jun — 25 Jun1
1 adult

Cheap flight deals from Ko Samui to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Ko Samui (USM) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 13 June 2025.

Round-trip from

£893

One-way from

£279

Popular in

January

Cheapest in

October

Average price

£939
2/8-16/8
  • 2/8-16/8
  • 4 total stops
  • 48h 45m total
  • Ko Samui to London
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30/11
  • 30/11
  • 2 total stops
  • 25h 45m total
  • Ko Samui to London
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£99 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£39 potential savings vs. average return price).
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Average for round-trip flights in June 2025
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Find flight deals from Ko Samui to Heathrow

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 13 June 2025.

Sat 2/821:00USM - LHR
2 stops21h 25mMultiple Airlines
Sat 16/822:15LHR - USM
2 stops27h 20mMultiple Airlines
Deal found 11/6£893
Mon 28/715:30USM - LHR
2 stops20h 55mQatar Airways
Mon 4/810:50LHR - USM
2 stops20h 55mQatar Airways
Deal found 13/6£1,003
Tue 26/816:25USM - LHR
1 stop20h 10mQantas Airways
Wed 10/920:50LHR - USM
1 stop18h 20mQantas Airways
Deal found 11/6£1,010
Mon 25/809:15USM - LHR
2 stops28h 40mSWISS
Fri 12/908:40LHR - USM
2 stops23h 05mSWISS
Deal found 11/6£1,050
Sat 2/808:45USM - LHR
1 stop16h 35mEVA Air
Sat 16/821:35LHR - USM
1 stop17h 15mEVA Air
Deal found 11/6£1,074
Fri 22/810:55USM - LHR
1 stop24h 45mCathay Pacific
Tue 9/918:20LHR - USM
1 stop18h 15mCathay Pacific
Deal found 11/6£1,120
Tue 26/816:25USM - LHR
2 stops23h 30mLufthansa
Sat 6/917:30LHR - USM
2 stops21h 40mLufthansa
Deal found 11/6£1,204

Cheapflights Fare Finder

Customise your flight search to find flights from Ko Samui to Heathrow 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, Cheapflights users made 858,174 searches. Data last updated 13 June 2025.
Use the filters below to find and compare flights from Ko Samui to London Heathrow Airport that are best for you.

Fly from

Ko Samui

Fly to

Heathrow

Route

Depart

Return

Price

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 2/8

21:00-12:25

2 stops21h 25m

London Heathrow

Sat 16/8

22:15-07:35

2 stops27h 20m

£893

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 26/8

16:25-06:35

1 stop20h 10m

London Heathrow

Wed 10/9

20:50-21:10

1 stop18h 20m

£1,010

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 25/8

12:10-06:25

2 stops24h 15m

London Heathrow

Thu 11/9

09:00-10:30

2 stops19h 30m

£1,045

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 25/8

09:15-07:55

2 stops28h 40m

London Heathrow

Fri 12/9

08:40-13:45

2 stops23h 05m

£1,050

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 2/8

08:45-19:20

1 stop16h 35m

London Heathrow

Sat 16/8

21:35-20:50

1 stop17h 15m

£1,074

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fri 22/8

10:55-05:40

1 stop24h 45m

London Heathrow

Sun 7/9

18:20-18:35

1 stop18h 15m

£1,120

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 26/8

16:25-09:55

2 stops23h 30m

London Heathrow

Sat 6/9

17:30-21:10

2 stops21h 40m

£1,204

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 30/11

11:10-05:55

2 stops25h 45m

£279

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 26/11

19:00-12:10

2 stops24h 10m

£439

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 1/12

08:30-19:20

1 stop17h 50m

£442

Flights are sorted by cheapest return flights first.

Deals found on 11/6

Showing 1-10 of 17 results
1
2

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.
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.

Cheapflights Insights

Everything you need to know about your flight from Ko Samui to London Heathrow Airport

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

Find hourly flight availability from Ko Samui to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 13 June 2025.

It’s typically best to fly out from Ko Samui to London Heathrow Airport in the afternoon. Doing so could potentially save you 17% on the flight price compared to flying at midday, which is usually more expensive.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

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.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

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).

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 13 June 2025.
EVA Air
8.4
Very Good
1,202 reviews
Check prices

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
EVA Air
8.4
Very Good
1,202 reviews
EVA Air
8.4
Very Good
1,202 reviews
Check prices

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Emirates
8.1
Very Good
3,265 reviews
EVA Air
8.4
Very Good
1,202 reviews
Check prices

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Singapore Airlines
8.1
Very Good
1,304 reviews
EVA Air
8.4
Very Good
1,202 reviews
Check prices

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Thai Airways
7.7
Good
335 reviews
EVA Air
8.4
Very Good
1,202 reviews
Check prices

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Finnair
7.6
Good
1,290 reviews
EVA Air
8.4
Very Good
1,202 reviews
Check prices

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Related info for your journey

Find useful and relevant information for your journey from Ko Samui to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    For a flight from Ko Samui to London Heathrow, you will be flying from Ko Samui. Ko Samui (USM) is just 2.1 mi from the center of the city. Ko Samui is the only Ko Samui airport and it handles 0 outbound flights to London Heathrow per day. 0 airlines have flights to London Heathrow from Ko Samui on a regular basis.

  • What are the cheapest airlines flying from Ko Samui to London Heathrow Airport round-trip?

    Our cheapest airline available from Ko Samui to London Heathrow Airport is Qantas Airways. Our recent data shows that you can find tickets from as low as £1,010 on this airline. Additional options worth looking into are Qatar Airways and SWISS, starting at £1,045 and £1,050 round-trip.

  • What are the cheapest airlines to fly from Ko Samui to London Heathrow Airport one-way?

    £439 is the cheapest one-way deal found within the past few days, from Qatar Airways. You may also be able to find cheap deals on EVA Air and Emirates, with prices starting from £442 and £469, respectively.

  • 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.

  • What is the cheapest month to book a flight from Ko Samui to London Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from Ko Samui to London Heathrow Airport (average of £112). Flying from Ko Samui to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Ko Samui?

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

Yes, Cheapflights offers price alerts on Ko Samui to Heathrow flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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