USM - LON

£253 Find Cheap Flights from Ko Samui to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ko Samui to London departing on 7/12. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to London

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ko Samui to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ko Samui to London, as well as popular online travel agencies
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Ko Samui to London (USM-LON)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Ko Samui to London that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Ko Samui to London

Mon, 30 Mar - Tue, 7 Apr
Multiple Airlines Logo
07:00 - 18:30USM-LGW
17h 30m1 stop
Multiple Airlines Logo
16:00 - 20:30LGW-USM
22h 30m1 stop
£654Multiple Airlines
Find Deal
Mon, 30 Mar - Tue, 7 Apr
Multiple Airlines Logo
07:00 - 12:40USM-LHR
35h 40m2 stops
Multiple Airlines Logo
14:40 - 21:35LHR-USM
24h 55m2 stops
£709Multiple Airlines
Find Deal
Mon, 30 Mar - Tue, 7 Apr
Multiple Airlines Logo
08:45 - 06:40USM-LGW
27h 55m2 stops
Multiple Airlines Logo
16:00 - 07:20LGW-USM
33h 20m1 stop
£742Multiple Airlines
Find Deal
Mon, 30 Mar - Tue, 7 Apr
Multiple Airlines Logo
10:05 - 06:40USM-LGW
26h 35m2 stops
Multiple Airlines Logo
11:35 - 15:45LGW-USM
22h 10m2 stops
£798Multiple Airlines
Find Deal
Mon, 30 Mar - Tue, 7 Apr
SWISS Logo
16:25 - 08:50USM-LCY
22h 25m2 stops
SWISS Logo
19:20 - 21:10LCY-USM
19h 50m2 stops
£856SWISS
Find Deal
Mon, 30 Mar - Tue, 7 Apr
Multiple Airlines Logo
07:00 - 19:10USM-LHR
18h 10m1 stop
Multiple Airlines Logo
20:55 - 07:20LHR-USM
28h 25m2 stops
£897Multiple Airlines
Find Deal
Fri, 12 Dec - Fri, 19 Dec
Etihad Airways Logo
11:40 - 06:40USM-LHR
26h 00m2 stops
Etihad Airways Logo
13:55 - 15:10LHR-USM
18h 15m2 stops
£1,243Etihad Airways
Find Deal
Fri, 12 Dec - Fri, 19 Dec
Qatar Airways Logo
11:40 - 05:55USM-LGW
25h 15m2 stops
Qatar Airways Logo
09:00 - 08:25LGW-USM
16h 25m2 stops
£1,273Qatar Airways
Find Deal
Fri, 12 Dec - Fri, 19 Dec
SWISS Logo
09:20 - 08:00USM-LCY
29h 40m2 stops
SWISS Logo
09:20 - 10:40LCY-USM
18h 20m2 stops
£1,588SWISS
Find Deal
Fri, 12 Dec - Fri, 19 Dec
British Airways Logo
19:10 - 05:30USM-LGW
17h 20m1 stop
British Airways Logo
21:15 - 19:50LGW-USM
15h 35m1 stop
£4,750British Airways
Find Deal

Everything you should know

Our travellers' advice
AI-generated summary based on content written by travel experts
Finnair’s economy comfort offers more legroom.
BA’s cabin crew are professional and proactive.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
SWISS
Cheapest • from £856 (return)
Austrian Airlines
Best reviews • 7.6 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest return fare
£654
Multiple Airlines
Mon 30/3Tue 7/4
USM - LGW • 1 stop
Cheapest one-way flight
£253
Multiple Airlines
Sun 7/12
USM - LGW • 3 stops
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to London!
Booking Insights

KAYAK's insights & trends for Ko Samui to London flights

Get data-powered insights and trends into flights from Ko Samui to London to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Ko Samui to London?

The average price of all round-trip flights from Ko Samui to London clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to London on a Friday, as we generally find the cheapest rates on that day for this route. On the other hand, Monday is the most expensive day to fly from Ko Samui to London. For your return ticket, we recommend flying on a Wednesday and avoiding Sundays for the best deals.

Expert advice

Expert advice for your flight from Ko Samui to London

 
Snippets provided in this section are AI-generated based on a summarisation of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Finnair

Finnair’s A350 features lower cabin altitude and higher humidity for a better arrival feeling.


Finnair’s economy comfort offers more legroom for a small additional charge, enhancing comfort.

Read more about Finnairby Gabriel Leigh
Iberia

Iberia’s business class offers roomy seating with all-aisle access and comfortable bedding.


Enjoy Spanish cuisine with two meals on Iberia long-haul flights, including breakfast and lunch or dinner.

Read more about Iberiaby Marisa Garcia
British Airways

BA’s premium economy offers 18 cm extra legroom, priority boarding, and bigger baggage allowance.


BA’s cabin crew are professional and proactive, enhancing the flight experience.

Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on Finnair

Gabriel Leigh

Gabriel Leigh

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Marisa Garcia

Marisa Garcia

Expert on Iberia

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialising in airline interiors and regulations. 10 years ago, she pivoted to journalism. She shares her insights in leading aviation, travel and business publications and on her site, FlightChic.

Read more
Duncan Madden

Duncan Madden

Expert on British Airways

Duncan Madden

Duncan Madden

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Read more

Good to know - Cheap tickets from Ko Samui to London

Low seasonJune
Cheapest flight£253
Best time to beat the crowds (23% less expensive on average)
Most popular time to fly and prices are also 0% lower on average.
Flight from Ko Samui to London Gatwick Airport

When to book flights from Ko Samui to London

Are your dates flexible? Find out the best times to travel from Ko Samui to London based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ko Samui to London

  • What is the cheapest flight from Ko Samui to London?

    In the last 3 days, the lowest price for a flight from Ko Samui to London was £253 for a one-way ticket and £654 for a return.

  • Which airports will I be using when flying from Ko Samui to London?

    On your way to London, you’ll fly out from Ko Samui. You’ll be landing in one of London’s 2 airports: London Gatwick or London Heathrow.

  • Which aircraft models fly most regularly from Ko Samui to London?

    We unfortunately don’t have that data for this specific route.

  • Which is the best airline for flights from Ko Samui to London, Austrian Airlines or Qatar Airways?

    The two airlines most popular with KAYAK users for flights from Ko Samui to London are Austrian Airlines and Qatar Airways. With an average price for the route of £766 and an overall rating of 7.6, Austrian Airlines is the most popular choice. Qatar Airways is also a great choice for the route, with an average price of £981 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Ko Samui to London?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ko Samui to London.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ko Samui to London?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Ko Samui is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ko Samui to London?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London with an airline and back to Ko Samui with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ko Samui to London?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Ko Samui up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Ko Samui to London

 
See real verified KAYAK customer reviews for airlines flying from Ko Samui to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ko Samui to London? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.6
Austrian AirlinesOverall score based on 862 reviews
8.1Crew
7.3Comfort
6.8Food
7.6Boarding
6.8Entertainment
Airline reviews

Great! They got my vegetarian meal right, flight was comfortable, they helped store my heavy luggage. Pleasant crew and flight staff.

10.0 ExcellentL, Oct 2025VIE - EWR
Read more Austrian Airlines reviews

Great! They got my vegetarian meal right, flight was comfortable, they helped store my heavy luggage. Pleasant crew and flight staff.

My layover in Vienna was supposed to be 35 minutes but because my flight was canceled I had to wait in the airport for an additional 8 hours.

The flight was delayed for 30 minutes with no apparent reason. There is no entertainment at all, and no USB or electric outlets for charging your phone or tablet.

My flight was canceled and even though I paid אם KAYAK you didn't even answer me and obviously didn't refund my money. I will never buy a ticket through you again.

Accessibility serious problems in Viena airport making it seriousely difficult in in-between gates and boarding travel. Pretens of breakfast and service care in the economy pathetic.

One thing I really liked about Austrian Airlines was that the flight attendants were very kind, and the in-flight entertainment offered many choices. One thing that could be improved is the meal service, since only a vegetarian option was offered — it would be better to have at least two choices.

Despite the booked seats in front of the land we were moved to the back of the plane even first like 8 lines were totally without pasangers. When I tried to sit on empty seat flight attendant asked me to go to my dedicated seat in the fully crowded back of the plane. She was not able to explain why. Food was very poor on flight LAX - VIE.

We had a wonderful experience overall. The only issue was check-in our luggage at the Split Airport counter. It was very confusing because we needed to pay for baggage.

Quick and organized boarding process, friendly staff but not as many snacks and drinks as the previous flight overnight

Landing was a little hard. Food was not great My prior review was for the flight to nyc too

Excellent service. The personal adaptation of menus and the individual timing of service of them is fantastic.

Crew and food was good, ok leg room if you don’t have a big box under the seat. And the seats are so narrow (I’m only 70kg), will consider an alternate airline next time

Good. It would be great if comfort seats were available

My entire row did not have power for the full duration of a 14.5 hour flight. Could not charge any devices such as laptop or phones for the entirety of the long flight. The flight attendants tried to remedy the issue by resetting the power, but were not successful. The only other solution provided was to move me to another seat on the plane which was in the middle row. I had paid for a “preferred” seat that was a window seat. This was a downgrade being offered due to the power issue.

I prebooked a comfort plus seat on this flight and therefore the flight was comfy. I got the correct seat in the correct section of the plane that I have booked, that's this. Flight was comfortable. Staff were average on the flight, appearing to be rushed and short in engagement with travellers, perhaps this to maximise there rest time on the flight.

Terrible experience resolving missed connection after flight was delayed. 3 hour queue at transit desk, not enough staff, no organisation, worst ever flying experience.

It was ok, not much more can be said, as long as airlines/aircraft manufacturers insist on cramming in as many seats as possible....best of a bad situations, seats are simply too uncomfortable to sit in for more than a few hours. Lack of flexible headrests not a help on long overnight flights either.

I had to stay in the airport 15 even with a hotel reservation..i was refused to inter to qatar cuz the hotel was outside the airport. They could have offered a solution. It was really exhausting for me and my family.

I was unable to pre purchase sear upgrades or internet. Their online site is not user friendly and poor. I felt singled out in customs. Seats are very small even for a small person.

Qatar Airways did a very good job. Flights were slightly delayed with boarding but pilots made up time by arrival. The food was OK, no better or worse than other airlines. Although it would be nice to have three meals during 16 hours flight instead of two.

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car hires and package deals with KAYAK.