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Cheap flights from Ko Samui to London Heathrow Airport from £444

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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LHR
5 May — 12 May1
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 30 April 2025.

Round-trip from

£778

One-way from

£444

Popular in

January

Cheapest in

December

Average price

£1,043
8/6-30/6
  • 8/6-30/6
  • 4 total stops
  • 58h 40m total
  • Ko Samui to London
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3/9
  • 3/9
  • 1 total stop
  • 29h 55m total
  • Ko Samui to London
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£73 potential increase over avg. return price).
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Cheapest flight prices on average. 5% potential price decrease (£37 potential savings vs. average return price).
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Average for round-trip flights in April 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 30 April 2025.

Sun 8/607:00USM - LHR
1 stop18h 10mMultiple Airlines
Mon 30/622:00LHR - USM
3 stops40h 30mMultiple Airlines
Deal found 28/4£778
Mon 9/619:15USM - LHR
2 stops19h 05mAustrian Airlines
Tue 1/710:25LHR - USM
2 stops25h 20mAustrian Airlines
Deal found 29/4£823
Tue 10/607:00USM - LHR
1 stop18h 20mEVA Air
Wed 2/721:35LHR - USM
1 stop18h 00mEVA Air
Deal found 28/4£854
Wed 11/610:05USM - LHR
2 stops17h 40mSWISS
Wed 2/712:10LHR - USM
2 stops19h 35mSWISS
Deal found 28/4£855
Thu 12/613:30USM - LHR
2 stops25h 10mLufthansa
Wed 2/717:50LHR - USM
2 stops17h 15mLufthansa
Deal found 28/4£884
Fri 13/616:25USM - LHR
2 stops20h 40mEmirates
Tue 1/714:25LHR - USM
2 stops24h 45mEmirates
Deal found 29/4£914
Thu 12/610:55USM - LHR
1 stop34h 20mCathay Pacific
Tue 1/712:20LHR - USM
2 stops26h 10mCathay Pacific
Deal found 28/4£1,025
Tue 24/615:30USM - LHR
2 stops20h 55mQatar Airways
Tue 22/708:05LHR - USM
2 stops20h 05mQatar Airways
Deal found 29/4£1,040
Fri 13/615:50USM - LHR
2 stops33h 20mOman Air
Thu 3/720:50LHR - USM
2 stops32h 15mOman Air
Deal found 28/4£1,093
Thu 26/613:30USM - LHR
1 stop23h 05mQantas Airways
Sun 27/720:50LHR - USM
1 stop18h 20mQantas Airways
Deal found 29/4£1,098
Sun 8/615:50USM - LHR
2 stops21h 05mGulf Air
Sat 5/722:05LHR - USM
2 stops33h 40mGulf Air
Deal found 29/4£1,196
Tue 10/610:05USM - LHR
1 stop15h 05mThai Airways
Mon 30/612:30LHR - USM
1 stop14h 05mThai Airways
Deal found 28/4£1,248

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 30 April 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

Sun 8/6

07:00-19:10

1 stop18h 10m

London Heathrow

Mon 30/6

22:00-20:30

3 stops40h 30m

£778

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 9/6

19:15-08:20

2 stops19h 05m

London Heathrow

Tue 1/7

10:25-17:45

2 stops25h 20m

£823

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 10/6

07:00-19:20

1 stop18h 20m

London Heathrow

Wed 2/7

21:35-21:35

1 stop18h 00m

£854

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 11/6

10:05-21:45

2 stops17h 40m

London Heathrow

Wed 2/7

12:10-13:45

2 stops19h 35m

£855

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 12/6

13:30-08:40

2 stops25h 10m

London Heathrow

Tue 1/7

07:25-17:45

2 stops28h 20m

£884

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fri 13/6

16:25-07:05

2 stops20h 40m

London Heathrow

Tue 1/7

14:25-21:10

2 stops24h 45m

£914

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 12/6

10:55-15:15

1 stop34h 20m

London Heathrow

Tue 1/7

12:20-20:30

2 stops26h 10m

£1,025

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 24/6

15:30-06:25

2 stops20h 55m

London Heathrow

Tue 22/7

08:05-10:10

2 stops20h 05m

£1,040

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fri 13/6

15:50-19:10

2 stops33h 20m

London Heathrow

Thu 3/7

20:50-11:05

2 stops32h 15m

£1,093

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 26/6

13:30-06:35

1 stop23h 05m

London Heathrow

Sun 27/7

20:50-21:10

1 stop18h 20m

£1,098

Flights are sorted by cheapest return flights first.

Deals found on 29/4

Showing 1-10 of 18 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 30 April 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 30 April 2025.
EVA Air
8.4
Very Good
1,186 reviews
Check prices

Boarding

8.4

Overall

8.4

Food

8.1

Comfort

8.3

Crew

8.6

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Gary,Apr 2025

DPS - TPE

The staff was excellent. Kind, courteous, and overall just hospitable. Definitely recommend
EVA Air
8.4
Very Good
1,186 reviews
EVA Air
8.4
Very Good
1,186 reviews
Check prices

Boarding

8.4

Overall

8.4

Food

8.1

Comfort

8.3

Crew

8.6

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Gary,Apr 2025

DPS - TPE

The staff was excellent. Kind, courteous, and overall just hospitable. Definitely recommend
Singapore Airlines
8.1
Very Good
1,292 reviews
EVA Air
8.4
Very Good
1,186 reviews
Check prices

Boarding

8.4

Overall

8.4

Food

8.1

Comfort

8.3

Crew

8.6

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Gary,Apr 2025

DPS - TPE

The staff was excellent. Kind, courteous, and overall just hospitable. Definitely recommend
Emirates
8.0
Very Good
3,215 reviews
EVA Air
8.4
Very Good
1,186 reviews
Check prices

Boarding

8.4

Overall

8.4

Food

8.1

Comfort

8.3

Crew

8.6

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Gary,Apr 2025

DPS - TPE

The staff was excellent. Kind, courteous, and overall just hospitable. Definitely recommend
Thai Airways
7.7
Good
325 reviews
EVA Air
8.4
Very Good
1,186 reviews
Check prices

Boarding

8.4

Overall

8.4

Food

8.1

Comfort

8.3

Crew

8.6

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Gary,Apr 2025

DPS - TPE

The staff was excellent. Kind, courteous, and overall just hospitable. Definitely recommend

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 Austrian Airlines. Our recent data shows that you can find tickets from as low as £823 on this airline. Additional options worth looking into are EVA Air and SWISS, starting at £854 and £855 round-trip. These flights start at 18% lower than the current average price 3 months from now.

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

    £447 is the cheapest one-way deal found within the past few days, from EVA Air. You may also be able to find cheap deals on Qatar Airways and SWISS, with prices starting from £524 and £603, 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?

Book flights to Ko Samui if you plan to visit one of these locations
Deal
Hounslow
Milton Keynes
Gatwick
Luton
Slough
Croydon
Eastbourne
Northampton
Ilford
Hayes
Southend-on-Sea
Crawley
Wembley
Ipswich
Maidstone
Winchester
Swindon
Folkestone
Dartford

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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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