Flights to Ko Samui

£307 Cheap flights to Ko Samui

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to Ko Samui departing on 15/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from the United Kingdom to Ko Samui

Cheap return flights

 Logo
05:45 - 20:25LGW-USM
32h 40m3 stops
 Logo
07:00 - 18:30USM-LGW
18h 30m1 stop
Thu, 4 Sep - Wed, 29 Oct
 Logo
10:30 - 20:25LGW-USM
26h 55m2 stops
 Logo
07:00 - 14:00USM-LGW
38h 00m2 stops
Sat, 22 Nov - Sat, 6 Dec
Austrian Airlines Logo
19:30 - 17:45LHR-USM
16h 15m2 stops
Austrian Airlines Logo
19:30 - 09:00USM-LHR
19h 30m2 stops
£610Austrian Airlines
Find Deal
Fri, 12 Sep - Sun, 28 Sep
SWISS Logo
18:40 - 21:05LHR-USM
19h 25m2 stops
SWISS Logo
09:20 - 21:40USM-LHR
19h 20m2 stops
£625SWISS
Find Deal
Mon, 17 Nov - Mon, 24 Nov
SWISS Logo
09:00 - 21:05LHR-USM
29h 05m2 stops
SWISS Logo
09:20 - 17:50USM-LHR
39h 30m2 stops
£641SWISS
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Thu, 30 Oct - Mon, 3 Nov
KLM Logo
17:10 - 18:15LHR-USM
19h 05m2 stops
KLM Logo
08:00 - 20:55USM-LHR
18h 55m2 stops
£656KLM
Find Deal
Sun, 28 Sep - Fri, 17 Oct
KLM Logo
17:10 - 18:15LHR-USM
19h 05m2 stops
KLM Logo
07:00 - 20:50USM-LHR
20h 50m2 stops
£665KLM
Find Deal
Tue, 21 Oct - Mon, 27 Oct
Qatar Airways Logo
14:55 - 10:30LGW-USM
37h 35m2 stops
Qatar Airways Logo
17:55 - 06:40USM-LGW
18h 45m2 stops
£719Qatar Airways
Find Deal
Thu, 11 Sep - Thu, 18 Sep
Qatar Airways Logo
14:55 - 10:30LGW-USM
37h 35m2 stops
Qatar Airways Logo
08:00 - 06:40USM-LGW
28h 40m2 stops
£743Qatar Airways
Find Deal
Thu, 18 Sep - Sat, 27 Sep
Singapore Airlines Logo
09:20 - 10:50LGW-USM
18h 30m1 stop
Singapore Airlines Logo
19:25 - 06:25USM-LGW
18h 00m1 stop
£794Singapore Airlines
Find Deal
Mon, 17 Nov - Mon, 24 Nov

momondo Fare Finder

 
Locate flights to Ko Samui that fit your budget, with regularly updated fares and availability. In the last 7 days, momondo users made a total of 279,928 searches and data was last updated on 30 July 2025.
Use the filters below to find and compare flights to Ko Samui that are best for you.

Fly from

Route

Depart

Return

Price

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Thu 4/9

05:45-20:25

3 stops32h 40m

Ko Samui

Wed 29/10

07:00-18:30

1 stop18h 30m

£571

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Sat 22/11

10:30-20:25

2 stops26h 55m

Ko Samui

Sat 6/12

07:00-14:00

2 stops38h 00m

£590

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Fri 12/9

19:30-17:45

2 stops16h 15m

Ko Samui

Sun 28/9

19:30-09:00

2 stops19h 30m

£610

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 17/11

18:40-21:05

2 stops19h 25m

Ko Samui

Mon 24/11

09:20-21:40

2 stops19h 20m

£625

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Thu 30/10

09:00-21:05

2 stops29h 05m

Ko Samui

Mon 3/11

09:20-17:50

2 stops39h 30m

£641

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sun 28/9

17:10-18:15

2 stops19h 05m

Ko Samui

Fri 17/10

08:00-20:55

2 stops18h 55m

£656

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 21/10

17:10-18:15

2 stops19h 05m

Ko Samui

Mon 27/10

07:00-20:50

2 stops20h 50m

£665

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Thu 11/9

14:55-10:30

2 stops37h 35m

Ko Samui

Thu 18/9

17:55-06:40

2 stops18h 45m

£719

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Thu 18/9

14:55-10:30

2 stops37h 35m

Ko Samui

Sat 27/9

08:00-06:40

2 stops28h 40m

£743

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Mon 17/11

09:20-10:50

1 stop18h 30m

Ko Samui

Mon 24/11

19:25-06:25

1 stop18h 00m

£794

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Ko Samui from

Ko Samui flights insights and trends

Explore insights for your Ko Samui flight to craft the best travel plan

What is the cheapest month to fly to Ko Samui?

The cheapest month to fly to Ko Samui from United Kingdom is in September. Flight prices, which tend to average around £794, are often lower during this time because this is during the off-season. If you don’t want to visit Ko Samui in September, then you should wait until May to fly from United Kingdom, when ticket prices are also cheap, with an average price of £809.

What is the cheapest day to depart on your flight to Ko Samui?

According to our data, Wednesday is the cheapest day to fly to Ko Samui from United Kingdom. The lowest ticket price found for a Wednesday departure recently was £495. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Ko Samui on Sunday is £845.

What is the cheapest time of day to depart on your flight to Ko Samui?

Our most recent data shows that the best time of day to fly to Ko Samui is in the afternoon. Flights from United Kingdom to Ko Samui during this time can be as low as £502. Flights at midday are often more expensive, with an average ticket price of £815.

How far in advance should I book a flight to Ko Samui?

You are more likely to see cheaper flights to Ko Samui from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to Ko Samui for around £916 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ko Samui from United Kingdom for as low as £796 on momondo.

Cheapest flights to Ko Samui

Find the cheapest flights to Ko Samui from your nearest city or airport
CHEAPEST MONTH TO FLY TO KO SAMUI FROM LONDON HEATHROW AIRPORTSeptember14% cheaperFlying from London Heathrow Airport to Ko Samui costs on average just £792 in September
MOST EXPENSIVE MONTH TO FLY TO KO SAMUI FROM LONDON HEATHROW AIRPORTDecember36% more expensiveIt costs about £1,255 for flights to Ko Samui from London Heathrow Airport in December
MOST POPULAR MONTH TO FLY TO KO SAMUI FROM LONDON HEATHROW AIRPORTMarch383% more users visitedMore momondo users searched in flights to Ko Samui from London Heathrow Airport in March than any other month

Cheap Ko Samui flight deals and tips

Summary info about Ko Samui flight prices, duration and airlines

Best One-Way Price

£307

Best Round-Trip Price

£571

Fastest flight time

18h 35m

Popular in

December
The best one-way flight price to Ko Samui from United Kingdom in the last 72 hours is £307 (London Gatwick to Ko Samui).
The best round-trip flight price to Ko Samui from United Kingdom in the last 72 hours is £571 (London Gatwick to Ko Samui).
The fastest flight to Ko Samui from United Kingdom takes 18h 35m (London Gatwick to Ko Samui).
December has the highest demand for flights to Ko Samui, with a 6% price increase on average.

Frequently asked questions about flying to Ko Samui

What is there to do in Ko Samui when it’s raining?

When planning your flight to Ko Samui, it is important to be aware that some months are not as ideal as others. Specifically, the months of January, May, or October could carry a higher chance of rain, as Ko Samui sees up to 5.1 inches (130 mm) or more. There are still things to do in Ko Samui even when it's raining, but be aware that rain is highly probable in the area. Many tourists kill time during rain and storms by going to shopping centres in the area, like Fishermans Village.

When is the best time to plan a beach trip to Ko Samui?

Visitors planning their holidays in Ko Samui should book their flights for February, March, or April if they are planning on visiting Lamai Beach. Another popular beach in the area is Chaweng Beach.

How far in advance should I book a flight to Ko Samui?

Most flyers found that booking tickets 80 days in advance of their planned departure date is the best time to get cheap flights to Ko Samui. During this timeframe, flight prices are around £934. Keep in mind that you might also find cheap flights to Ko Samui outside of this time window. In fact, momondo users recently found flights from United Kingdom to Ko Samui for £780.

Is there an alternative airport near Ko Samui?

Finding an alternative and possibly cheaper destination airport near Ko Samui is possible. If you are planning a flight to Ko Samui, consider booking flights to Surat Thani Airport (67 mi from Ko Samui city centre), Nakhon Si Thammarat Airport (73 mi from Ko Samui city centre) or Chumphon Airport (95 mi from Ko Samui city centre).

Is there a cheaper alternative to flying into Ko Samui?

Prices vary based on where travellers are departing from, but on average, the cheapest airport to fly to in Ko Samui is Chumphon Airport where the average price is £25. Users typically find the best prices when using momondo’s Airport-to-Airport Pricing Tool.

What is the absolute cheapest flight to Ko Samui?

Users booking trips to Ko Samui from Bangkok found flights 48% cheaper than the average price of flights to Ko Samui. To find the cheapest price to Ko Samui from your area, use momondo’s Airport-to-Airport Pricing Tool.

When did momondo last update prices for flights to Ko Samui Airport?

Prices for flights to Ko Samui Airport refresh daily.

How many operators does momondo search for flights to Ko Samui Airport?

How old do you have to be to fly to Ko Samui Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel to Ko Samui Airport.

What documentation or ID do you need to fly to Ko Samui Airport?

The required travel and health documents for your Ko Samui Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ko Samui Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.


Travelling to a place near Ko Samui?

Book flights to Ko Samui if you plan to visit one of these locations
Ko Pha Ngan
Ko Tao
Khanom

Why use momondo?

Why should I use momondo to find a flight deal to Ko Samui?

Finding the right flight to Ko Samui is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. These options can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Ko Samui quick and easy, saving you time and money.

Can I find flights to Ko Samui with flexible booking policies on momondo?

momondo does allow users to show only those flights to Ko Samui which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights to Ko Samui?

momondo provides multiple filters to help you find the best flight to Ko Samui. Filter by price, airline, airport, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight to Ko Samui right now. Can momondo alert me if prices change?

Price alerts on flights to Ko Samui are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.


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