How long is the flight from Ko Samui to London?

Oman Air can get you from Ko Samui to London in just under 35h 10m. Your travel time can differ by up to . Ko Samui and London are separated by a distance of 6144 mi.

In terms of precipitation, rainfall in London 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 when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London, 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 are the most popular routes from Ko Samui to London?

When deciding which route to take from Ko Samui to London consider Ko Samui - London Heathrow, Ko Samui - London Gatwick or Ko Samui - London City as they are the most popular.

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

When flying from Ko Samui to London, 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?

If you book a flight to London from Ko Samui, you will be flying from Ko Samui, which is the city’s only airport. Ko Samui (USM) is located 2.1 mi from the center of Ko Samui. There are 0 flights from Ko Samui to London per day from 0 different airlines.

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

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

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

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

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

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

£254+ Cheap Flights from Ko Samui to London

Cheap flight deals from Ko Samui to London

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from Ko Samui to London
Explore the most affordable flight options available from Ko Samui to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 October 2026.

Wed 18/1108:15 -

2 stops30h 30m

Wed 25/1108:45 -

2 stops26h 40m

Deal found 4/10£633

Tue 17/1107:00 -

2 stops31h 45m

Tue 24/1108:45 -

2 stops23h 50m

Deal found 3/10£646

Mon 16/1115:50 -

2 stops22h 55m

Mon 23/1116:25 -

3 stops21h 00m

Deal found 2/10£686

Sun 15/1110:20 -

2 stops29h 15m

Sun 22/1106:25 -

3 stops24h 25m

Deal found 1/10£692

Mon 16/1112:00 -

2 stops25h 40m

Mon 23/1108:40 -

2 stops25h 30m

Deal found 2/10£701

Sun 1/1108:15 -

2 stops32h 20m

Sat 28/1113:55 -

2 stops21h 30m

Deal found 2/10£708

Tue 17/1121:10 -

2 stops48h 20m

Tue 24/1113:30 -

2 stops23h 20m

Deal found 3/10£750

Wed 18/1121:10 -

2 stops24h 45m

Wed 25/1112:30 -

2 stops24h 55m

Deal found 4/10£763

Sun 15/1119:10 -

2 stops50h 20m

Sun 22/1108:45 -

2 stops28h 40m

Deal found 1/10£775

Mon 19/1008:40 -

2 stops27h 55m

Fri 23/1011:15 -

2 stops25h 35m

Deal found 2/10£831

Thu 5/1114:15 -

2 stops35h 10m

Mon 9/1108:25 -

2 stops19h 10m

Deal found 1/10£843

Mon 19/1019:45 -

2 stops28h 00m

Fri 23/1008:25 -

2 stops18h 55m

Deal found 2/10£865

Best flights from Ko Samui to London
Discover carefully curated flight deals from Ko Samui to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 4 October 2026.

Mon 16/1115:50 -

2 stops22h 55m

Mon 23/1116:25 -

3 stops21h 00m

Deal found 2/10£686

Thu 5/1114:15 -

2 stops35h 10m

Mon 9/1108:25 -

2 stops19h 10m

Deal found 1/10£843

Thu 5/1118:15 -

2 stops24h 25m

Mon 9/1120:25 -

2 stops31h 15m

Deal found 2/10£861

Sun 15/1108:30 -

1 stop17h 35m

Sun 22/1121:20 -

1 stop16h 05m

Deal found 30/9£995

Tue 17/1119:10 -

1 stop17h 15m

Tue 24/1121:20 -

1 stop31h 30m

Deal found 3/10£1,023

Sun 15/1110:20 -

2 stops29h 15m

Sun 22/1106:25 -

3 stops24h 25m

Deal found 1/10£692

Fri 13/1107:00 -

2 stops21h 40m

Fri 20/1116:05 -

2 stops21h 20m

Deal found 29/9£721

Tue 17/1121:10 -

2 stops48h 20m

Tue 24/1113:30 -

2 stops23h 20m

Deal found 3/10£750

Thu 5/1116:25 -

2 stops28h 25m

Mon 9/1113:40 -

2 stops24h 25m

Deal found 30/9£922

Sun 15/1107:55 -

2 stops34h 10m

Sun 22/1113:00 -

2 stops35h 45m

Deal found 30/9£778

Wed 18/1121:10 -

2 stops25h 25m

Wed 25/1116:45 -

3 stops20h 40m

Deal found 4/10£793

Sat 27/316:30 -

2 stops20h 25m

Sat 10/413:40 -

2 stops19h 30m

Deal found 2/10£821

Mon 16/1107:00 -

1 stop19h 35m

Mon 23/1121:10 -

2 stops27h 00m

Deal found 2/10£872

Sun 1/1108:15 -

2 stops32h 20m

Sat 28/1121:20 -

1 stop15h 30m

Deal found 2/10£935

Find flight deals from Ko Samui to London

Round-trip from	£633
One-way from	£254

18/11-25/11
4 total stops
57h 10m total
Ko Samui to London

Search Deals

3/11-31/12
2 total stops
58h 15m total
Ko Samui to London

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Wed 4/11

21:10-21:40

2 stops31h 30m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

£277

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Sat 14/11

21:30-08:35

2 stops42h 05m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

£285

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Sat 5/12

08:55-05:55

2 stops28h 00m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

£313

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Sat 14/11

15:50-19:10

3 stops34h 20m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

£314

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Wed 23/12

12:25-09:20

2 stops27h 55m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

£320

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Tue 20/10

07:50-06:40

3 stops28h 50m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

£325

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Fri 25/12

15:05-15:55

1 stop31h 50m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

£325

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Mon 16/11

07:00-07:10

3 stops31h 10m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

£327

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Tue 20/10

11:05-09:50

3 stops28h 45m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

£369

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Wed 23/12

11:10-05:55

2 stops25h 45m

London Gatwick

Wed 31/12

00:00-06:00

Nonstop0h 00m

£411

Flights are sorted by cheapest return flights first.

Deals found on 3/10

Showing 1-10 of 33 resultsSorted by cheapest first

Best time to book a flight from Ko Samui to London

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

USM-LON

USM-LGW

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.

Cheapflights Insights

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

USM-LON

USM-LGW

USM-LHR

No data available for this route at this time. Please check back soon.

Related info for your journey

What airport do you fly from for flights from Ko Samui to London?
If you book a flight to London from Ko Samui, you will be flying from Ko Samui, which is the city’s only airport. Ko Samui (USM) is located 2.1 mi from the center of Ko Samui. There are 0 flights from Ko Samui to London per day from 0 different airlines.
How long is the flight from Ko Samui to London?
Oman Air can get you from Ko Samui to London in just under 35h 10m. Your travel time can differ by up to . Ko Samui and London are separated by a distance of 6144 mi.
What are the most popular routes from Ko Samui to London?
When deciding which route to take from Ko Samui to London consider Ko Samui - London Heathrow, Ko Samui - London Gatwick or Ko Samui - London City as they are the most popular.
Can I find deals for flights from Ko Samui to London that include hotel bookings?
Yes. In addition to deals on Ko Samui to London flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Ko Samui to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ko Samui to London.
Can I find deals for business class flights from Ko Samui to London?
Yes. Cheapflights offers flight deals from Ko Samui to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ko Samui to London. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Ko Samui to London?

Cheapflights helps you find that perfect flight to London from Ko Samui by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Yes! Cheapflights helps users easily find flights from Ko Samui to London with no change fees.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to London from Ko Samui today and book when prices fit your budget.

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Cheap flights from Ko Samui to London from £254

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ko Samui to London

Cheapest flights from Ko Samui to LondonExplore the most affordable flight options available from Ko Samui to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 October 2026.

Explore the most affordable flight options available from Ko Samui to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 October 2026.

Best flights from Ko Samui to LondonDiscover carefully curated flight deals from Ko Samui to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 4 October 2026.

Discover carefully curated flight deals from Ko Samui to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 4 October 2026.

Last-minute flights from Ko Samui to LondonDiscover last-minute flight deals from Ko Samui to London. Data last updated 4 October 2026 and is based on user searches.

Discover last-minute flight deals from Ko Samui to London. Data last updated 4 October 2026 and is based on user searches.

One-way flights from Ko Samui to LondonSearch for one-way flight options from Ko Samui to London. Find affordable one-way fares based on user searches. Data last updated 4 October 2026.

Search for one-way flight options from Ko Samui to London. Find affordable one-way fares based on user searches. Data last updated 4 October 2026.

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Best time to book a flight from Ko Samui to London

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Related info for your journey

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

How long is the flight from Ko Samui to London?

What are the most popular routes from Ko Samui to London?

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

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

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

Travelling to a place near London?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ko Samui to London

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Other flights to London

Explore flights to London departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 4 October 2026.

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Cheapest flights from Ko Samui to London
Explore the most affordable flight options available from Ko Samui to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 October 2026.

Best flights from Ko Samui to London
Discover carefully curated flight deals from Ko Samui to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 4 October 2026.

Last-minute flights from Ko Samui to London
Discover last-minute flight deals from Ko Samui to London. Data last updated 4 October 2026 and is based on user searches.

One-way flights from Ko Samui to London
Search for one-way flight options from Ko Samui to London. Find affordable one-way fares based on user searches. Data last updated 4 October 2026.