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£300+ Cheap flights to Ko Samui

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 18/9. Fares are subject to change and may not be available on all flights or dates of travel.
— USM
3 Sep — 10 Sep1
1 adult
1 adult, Economy, 0 bags

Flights to Ko Samui in 2026

Enter your travel dates to find the best prices.

Cheapest flights to Ko Samui
Explore the most affordable flight options available to Ko Samui. Find the lowest fares based on data from user searches, with prices last updated on 4 August 2026.

Tue 1/912:35
LGW
-
USM
2 stops23h 10m
Multiple Airlines
Tue 8/910:05
USM
-
LGW
2 stops26h 30m
Multiple Airlines
Deal found 30/7£682
Tue 24/1109:00
LHR
-
USM
2 stops18h 40m
SWISS
Thu 17/1210:00
USM
-
LHR
2 stops18h 40m
SWISS
Deal found 31/7£683
Wed 30/906:00
LHR
-
USM
2 stops29h 45m
Multiple Airlines
Thu 15/1008:45
USM
-
LHR
2 stops19h 00m
Multiple Airlines
Deal found 4/8£684
Sun 30/811:00
LGW
-
USM
2 stops25h 45m
Multiple Airlines
Wed 9/906:55
USM
-
LGW
2 stops29h 35m
Multiple Airlines
Deal found 31/7£685
Wed 30/906:00
LHR
-
USM
2 stops32h 30m
Austrian Airlines
Wed 14/1020:35
USM
-
LHR
2 stops17h 45m
Austrian Airlines
Deal found 4/8£685
Sun 1/1106:00
LHR
-
USM
2 stops26h 35m
Austrian Airlines
Mon 30/1120:20
USM
-
LHR
2 stops19h 00m
Austrian Airlines
Deal found 1/8£688
Wed 16/906:00
LHR
-
USM
2 stops32h 30m
Austrian Airlines
Wed 23/920:35
USM
-
LHR
2 stops17h 45m
Austrian Airlines
Deal found 1/8£688
Sat 17/1016:55
LGW
-
USM
2 stops18h 10m
Multiple Airlines
Tue 27/1008:30
USM
-
LGW
1 stop38h 05m
Multiple Airlines
Deal found 30/7£689
Mon 14/910:00
LHR
-
USM
2 stops25h 05m
Multiple Airlines
Mon 21/906:00
USM
-
LHR
2 stops30h 55m
Multiple Airlines
Deal found 31/7£689
Tue 13/1013:50
LHR
-
USM
2 stops17h 55m
Multiple Airlines
Wed 28/1016:25
USM
-
LHR
2 stops22h 40m
Multiple Airlines
Deal found 30/7£690
Tue 15/910:00
LHR
-
USM
2 stops20h 45m
Multiple Airlines
Tue 22/915:50
USM
-
LHR
2 stops21h 05m
Multiple Airlines
Deal found 1/8£691
Wed 2/906:00
LHR
-
USM
2 stops32h 30m
Austrian Airlines
Mon 21/920:35
USM
-
LHR
2 stops17h 45m
Austrian Airlines
Deal found 3/8£692

Find flight deals to Ko Samui

Find the latest flights to Ko Samui in 2026, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 4 August 2026.

Return from

£682

One-way from

£300

Popular in

December

Cheapest in

November

Average price

£970
1/9-8/9
  • 1/9-8/9
  • 4 total stops
  • 49h 40m total
  • London to Ko Samui
Search Deals
18/9
  • 18/9
  • 3 total stops
  • 52h 30m total
  • London to Ko Samui
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£114 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£45 potential savings vs. average return price).
Search Deals
Average for return flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Locate flights to Ko Samui that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 4 August 2026.
Use the filters below to find and compare flights to Ko Samui that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Sun 23/8

10:40-17:05

2 stops24h 25m

Ko Samui

Tue 8/9

14:35-06:55

2 stops22h 20m

£749

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Thu 27/8

05:40-18:50

3 stops31h 10m

Ko Samui

Sun 27/9

08:40-12:05

3 stops33h 25m

£754

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Tue 12/1

18:40-21:05

2 stops19h 25m

Ko Samui

Sun 24/1

16:25-07:50

2 stops22h 25m

£763

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Sat 5/9

05:40-18:50

3 stops31h 10m

Ko Samui

Fri 18/9

11:05-19:55

3 stops38h 50m

£775

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Fri 9/10

06:20-17:20

3 stops29h 00m

Ko Samui

Mon 19/10

19:45-23:55

3 stops34h 10m

£810

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Thu 14/1

18:40-21:05

2 stops19h 25m

Ko Samui

Sun 24/1

16:25-07:50

2 stops22h 25m

£812

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Thu 3/9

14:45-17:05

2 stops20h 20m

Ko Samui

Thu 17/9

06:00-18:45

2 stops18h 45m

£821

LondonKo Samui

LCY - USM

LCYUSM

London City

Wed 21/10

13:10-12:45

2 stops17h 35m

Ko Samui

Mon 26/10

16:25-08:40

2 stops23h 15m

£827

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Fri 4/9

05:40-18:50

3 stops31h 10m

Ko Samui

Fri 18/9

11:05-19:55

3 stops38h 50m

£829

LondonKo Samui

LCY - USM

LCYUSM

London City

Mon 19/10

09:15-12:45

2 stops21h 30m

Ko Samui

Sun 25/10

10:00-08:40

2 stops29h 40m

£833

Flights are sorted by cheapest return flights first.

Deals found on 3/8

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to 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 to Ko Samui

How long is the flight to Ko Samui?

On average, a flight from London to Ko Samui takes 17 hours 51 minutes. Flights to Ko Samui from other popular cities in United Kingdom will vary in length. Below are a few examples of popular routes and their flight times.

What are the most popular airlines that fly to Ko Samui?

The most popular airlines flying from London to Ko Samui are Thai Airways, EVA Air and Singapore Airlines.

Thai Airways
Thai Airways
From £767
EVA Air
EVA Air
From £698
Qatar Airways
Qatar Airways
From £752
Singapore Airlines
Singapore Airlines
From £742

What are the cheapest airlines that fly to Ko Samui?

The cheapest airlines flying from London to Ko Samui are Bangkok Airways, Oman Air and Austrian Airlines.

Rainfall in Ko Samui by month

Plan your trip to Ko Samui by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ko Samui ranges from 58.0 - 490.0 inches per month. November is typically the wettest month, when rainfall can reach 490.0 mm. February is typically the driest time to visit Ko Samui when rainfall is around 58.0 mm.

Temperature in Ko Samui by month

Plan your trip to Ko Samui by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ko Samui, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 29.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 27.0 C).

When is the best time to book a flight to Ko Samui?

To ensure you get the cheapest price possible for a flight to Ko Samui, you should look to book at least 26 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Reviews of airlines servicing Ko Samui

Get insights into the airlines that provide service to Ko Samui. 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 Ko Samui. Reviews last updated 4 August 2026.
See what other customers who have flown with EVA Air,Singapore Airlines, andThai Airways to Thailand have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.5
Very Good
1,511 reviews
Check prices

Comfort

8.3

Boarding

8.5

Food

8.1

Crew

8.7

Entertainment

8.0

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CRK - TPE

What about midnight snacks to add? Used to have that before..
EVA Air
8.5
Very Good
1,511 reviews
EVA Air
8.5
Very Good
1,511 reviews
Check prices

Comfort

8.3

Boarding

8.5

Food

8.1

Crew

8.7

Entertainment

8.0

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CRK - TPE

What about midnight snacks to add? Used to have that before..
Singapore Airlines
8.2
Very Good
1,584 reviews
EVA Air
8.5
Very Good
1,511 reviews
Check prices

Comfort

8.3

Boarding

8.5

Food

8.1

Crew

8.7

Entertainment

8.0

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CRK - TPE

What about midnight snacks to add? Used to have that before..
Thai Airways
7.9
Good
413 reviews
EVA Air
8.5
Very Good
1,511 reviews
Check prices

Comfort

8.3

Boarding

8.5

Food

8.1

Crew

8.7

Entertainment

8.0

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CRK - TPE

What about midnight snacks to add? Used to have that before..
Qatar Airways
7.4
Good
3,736 reviews
EVA Air
8.5
Very Good
1,511 reviews
Check prices

Comfort

8.3

Boarding

8.5

Food

8.1

Crew

8.7

Entertainment

8.0

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CRK - TPE

What about midnight snacks to add? Used to have that before..
British Airways
6.7
Okay
8,147 reviews
EVA Air
8.5
Very Good
1,511 reviews
Check prices

Comfort

8.3

Boarding

8.5

Food

8.1

Crew

8.7

Entertainment

8.0

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CRK - TPE

What about midnight snacks to add? Used to have that before..

FAQs about flying to Ko Samui

  • What airport do you fly into for flights to Ko Samui?

    Booking a flight to Ko Samui (USM) is your only option if you intend on flying to Ko Samui. It is only a 2.1 mi journey from Ko Samui to Ko Samui’s city center.

  • Can I find cheaper flights to Ko Samui if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Ko Samui on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Ko Samui?

    Based on reviews from Cheapflights users, Bangkok Airways is rated the highest out of the airlines that fly to Ko Samui.

  • What is the cheapest airport to fly to in Ko Samui?

    Ko Samui is currently the cheapest airport to fly to in Ko Samui. One-way flights to Ko Samui typically cost £60, while return flights cost around £121.

  • How much is a return flight to Ko Samui?

    A return flight to Ko Samui will typically cost around £225, however they can be found for as little as £121.

  • Where does the fastest flight to Ko Samui depart from?

    For those looking to save time traveling to Ko Samui, London offers the quickest one-way flight (15 hours 10 minutes).

  • Does Ko Samui have car hire?

    Yes. Those touching down at Ko Samui can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to Ko Samui?

    Yes. Ko Samui has hotels nearby for those requiring accommodations. Diamond Pool Villa Samui is the closest property to Ko Samui (0.0 mi away from Ko Samui).

See more FAQs

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

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Cheapflights does show flights with no change fees to all users. To see these options for flights to Ko Samui, users can toggle the no change fees filter when performing a flight search.

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