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Cheap flights from Koh Samui to London Heathrow Airport from £464

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 6/6. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LHR
26 Feb — 5 Mar1
1 adult

Cheap flight deals from Koh Samui to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Koh 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 21 February 2025.

Round-trip from

£833

One-way from

£464

Popular in

January

Cheapest in

October

Average price

£843
22/3-29/3
  • 22/3-29/3
  • 4 total stops
  • 66h 45m total
  • Koh Samui to London
Search Deals
EVA Air
  • EVA Air
  • 6/6
  • 1 total stop
  • 16h 35m total
  • Koh Samui to London
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£188 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (£52 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2025
Search Deals

Find flight deals from Koh Samui to Heathrow

Cheapest flights from Koh Samui to Heathrow
Explore the most affordable flight options available from Koh Samui to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 February 2025.

Sat 22/308:15USM - LHR
2 stops29h 20mMultiple Airlines
Sat 29/321:50LHR - USM
2 stops37h 25mMultiple Airlines
Deal found 19/2£833
Sun 15/607:00USM - LHR
1 stop18h 10mThai Airways
Sun 15/621:25LHR - USM
1 stop32h 15mThai Airways
Deal found 21/2£909
Sat 22/308:15USM - LHR
1 stop29h 00mQantas Airways
Sat 29/320:10LHR - USM
1 stop18h 00mQantas Airways
Deal found 19/2£942

Find flights from Koh Samui to Heathrow within your budget

Customise your flight search to find flights from Koh 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 21 February 2025.

Fly from

Koh Samui

Fly to

Heathrow

Route

Depart

Return

Price

Koh SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 22/3

08:15-06:35

2 stops29h 20m

London Heathrow

Sat 29/3

21:50-18:15

2 stops37h 25m

£833

Koh SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 15/6

07:00-19:10

1 stop18h 10m

London Heathrow

Sun 15/6

21:25-11:40

1 stop32h 15m

£909

Koh SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 22/3

08:15-06:15

1 stop29h 00m

London Heathrow

Sat 29/3

20:10-21:10

1 stop18h 00m

£942

Koh SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fri 6/6

08:45-19:20

1 stop16h 35m

£464

Koh SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 5/5

13:30-14:10

2 stops30h 40m

£476

Koh SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 21/6

10:05-19:10

1 stop15h 05m

£485

Koh SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 6/3

08:15-06:15

1 stop29h 00m

£508

Koh SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fri 18/4

21:10-18:00

2 stops26h 50m

£603

Koh SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 3/5

13:30-06:30

1 stop23h 00m

£716

Flights are sorted by cheapest return flights first.

Deals found on 20/2

Best time to book a flight from Koh Samui to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Koh 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.

Travel insights for flights from Koh Samui to Heathrow

Get recent, data-driven insights about flights from Koh Samui to Heathrow including ideal travel times, pricing trends, and more.

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

Find hourly flight availability from Koh 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 21 February 2025.

It’s typically best to fly out from Koh Samui to London Heathrow Airport in the afternoon. Doing so could potentially save you 11% 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 21 February 2025.
EVA Air
8.4
Very Good
1,200 reviews
Check prices

Food

8.0

Boarding

8.4

Overall

8.4

Entertainment

8.0

Comfort

8.2

Crew

8.6

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

EVA Air
8.4
Very Good
1,200 reviews
EVA Air
8.4
Very Good
1,200 reviews
Check prices

Food

8.0

Boarding

8.4

Overall

8.4

Entertainment

8.0

Comfort

8.2

Crew

8.6

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Thai Airways
7.8
Good
317 reviews
EVA Air
8.4
Very Good
1,200 reviews
Check prices

Food

8.0

Boarding

8.4

Overall

8.4

Entertainment

8.0

Comfort

8.2

Crew

8.6

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Qatar Airways
7.4
Good
3,609 reviews
EVA Air
8.4
Very Good
1,200 reviews
Check prices

Food

8.0

Boarding

8.4

Overall

8.4

Entertainment

8.0

Comfort

8.2

Crew

8.6

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Qantas Airways
7.4
Good
813 reviews
EVA Air
8.4
Very Good
1,200 reviews
Check prices

Food

8.0

Boarding

8.4

Overall

8.4

Entertainment

8.0

Comfort

8.2

Crew

8.6

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

British Airways
6.6
Okay
6,762 reviews
EVA Air
8.4
Very Good
1,200 reviews
Check prices

Food

8.0

Boarding

8.4

Overall

8.4

Entertainment

8.0

Comfort

8.2

Crew

8.6

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Related info for your journey

Find useful and relevant information for your journey from Koh 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 Koh Samui to London Heathrow?

    For a flight from Koh 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 Koh 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 Koh Samui to London Heathrow Airport round-trip?

    Our cheapest airline available from Koh Samui to London Heathrow Airport is Thai Airways. Our recent data shows that you can find tickets from as low as £909 on this airline. An additional option worth looking into is Qantas Airways, starting at £942.

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

    The cheapest airline one-way is EVA Air, with whom users have recently found tickets for as low as £464. However, be on the lookout for offers from Thai Airways and Qantas Airways, as they are both options that can get you from Koh Samui to London Heathrow Airport for a low price.

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

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

  • How can I find direct flights from Koh Samui to Heathrow?

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

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

    Yes. Cheapflights offers flight deals from Koh 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 Koh Samui to London Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from Koh Samui to London Heathrow Airport (average of £112). Flying from Koh Samui to London Heathrow Airport in August is currently the most expensive (average of £163). 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 Koh Samui?

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

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

Need flexible booking options for your flight to Heathrow from Koh Samui? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Yes, Cheapflights offers price alerts on Koh 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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