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£347+ 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 25/9. Fares are subject to change and may not be available on all flights or dates of travel.
— USM
9 Jul — 16 Jul1
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 9 June 2026.

Wed 14/1013:10
LCY
-
USM
2 stops17h 35m
SWISS
Wed 28/1016:25
USM
-
LCY
2 stops23h 15m
SWISS
Deal found 7/6£775
Wed 24/610:00
LHR
-
USM
2 stops20h 45m
Multiple Airlines
Tue 7/717:25
USM
-
LHR
2 stops19h 30m
Multiple Airlines
Deal found 7/6£776
Thu 18/609:00
LGW
-
USM
2 stops43h 30m
Qatar Airways
Sat 18/719:00
USM
-
LGW
2 stops41h 40m
Qatar Airways
Deal found 4/6£777
Thu 11/615:05
LHR
-
USM
2 stops19h 50m
Qatar Airways
Fri 19/617:55
USM
-
LHR
2 stops18h 30m
Qatar Airways
Deal found 7/6£777
Sat 13/614:45
LHR
-
USM
2 stops23h 40m
Multiple Airlines
Sat 20/608:00
USM
-
LHR
2 stops37h 05m
Multiple Airlines
Deal found 5/6£778
Sun 23/818:40
LHR
-
USM
2 stops20h 30m
SWISS
Wed 9/908:45
USM
-
LHR
2 stops29h 10m
SWISS
Deal found 6/6£779
Sun 1/1110:30
LGW
-
USM
2 stops24h 10m
Multiple Airlines
Sun 29/1119:10
USM
-
LGW
2 stops25h 50m
Multiple Airlines
Deal found 7/6£780
Thu 11/622:15
LGW
-
USM
1 stop16h 15m
British Airways
Fri 19/619:15
USM
-
LGW
1 stop16h 40m
British Airways
Deal found 7/6£780
Wed 10/610:00
LHR
-
USM
2 stops22h 45m
Multiple Airlines
Thu 2/715:50
USM
-
LHR
2 stops21h 05m
Multiple Airlines
Deal found 4/6£781
Sat 27/609:00
LGW
-
USM
2 stops43h 30m
Qatar Airways
Sat 11/717:55
USM
-
LGW
2 stops42h 45m
Qatar Airways
Deal found 8/6£782
Wed 10/608:25
LHR
-
USM
2 stops27h 35m
Qatar Airways
Fri 19/615:25
USM
-
LHR
2 stops22h 35m
Qatar Airways
Deal found 5/6£782
Sun 13/910:40
LGW
-
USM
2 stops22h 30m
Gulf Air
Thu 17/914:00
USM
-
LGW
2 stops22h 55m
Gulf Air
Deal found 7/6£783

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 9 June 2026.

Return from

£775

One-way from

£347

Popular in

December

Cheapest in

November

Average price

£823
SWISS
  • SWISS
  • 14/10-28/10
  • 4 total stops
  • 40h 50m total
  • London to Ko Samui
Search Deals
25/9
  • 25/9
  • 3 total stops
  • 51h 10m total
  • London to Ko Samui
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£88 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£39 potential savings vs. average return price).
Search Deals
Average for return flights in June 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 9 June 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 13/9

10:40-14:45

2 stops22h 05m

Ko Samui

Thu 17/9

15:20-06:55

2 stops21h 35m

£783

LondonKo Samui

LCY - USM

LCYUSM

London City

Fri 6/11

13:30-14:55

2 stops18h 25m

Ko Samui

Sun 15/11

10:00-08:40

2 stops29h 40m

£787

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 26/10

13:45-15:35

2 stops18h 50m

Ko Samui

Fri 30/10

09:20-21:40

2 stops19h 20m

£833

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Fri 13/11

18:40-21:05

2 stops19h 25m

Ko Samui

Fri 4/12

18:15-17:50

2 stops30h 35m

£840

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Wed 11/11

18:40-21:05

2 stops19h 25m

Ko Samui

Fri 4/12

18:15-17:50

2 stops30h 35m

£840

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Thu 27/8

18:35-21:10

2 stops20h 35m

Ko Samui

Sun 13/9

09:15-08:25

2 stops29h 10m

£847
Fastest return journey

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 1/9

19:25-18:15

1 stop16h 50m

Ko Samui

Tue 29/9

16:25-06:35

1 stop20h 10m

£859

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Thu 2/7

09:00-10:30

2 stops19h 30m

Ko Samui

Mon 13/7

17:55-06:40

2 stops18h 45m

£891

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Thu 2/7

09:30-10:30

2 stops19h 00m

Ko Samui

Mon 13/7

17:55-08:00

2 stops20h 05m

£920

LondonKo Samui

STN - USM

STNUSM

London Stansted

Sun 13/9

14:55-21:35

2 stops24h 40m

Ko Samui

Thu 17/9

17:50-12:55

2 stops25h 05m

£928

Flights are sorted by cheapest return flights first.

Deals found on 5/6

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 18 hours 13 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 £769
EVA Air
EVA Air
From £708
Singapore Airlines
Singapore Airlines
From £748
Qatar Airways
Qatar Airways
From £758

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 72 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 9 June 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
1,470 reviews
Check prices

Entertainment

8.0

Comfort

8.3

Crew

8.7

Boarding

8.4

Food

8.1

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!
EVA Air
8.5
Very Good
1,470 reviews
EVA Air
8.5
Very Good
1,470 reviews
Check prices

Entertainment

8.0

Comfort

8.3

Crew

8.7

Boarding

8.4

Food

8.1

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!
Singapore Airlines
8.2
Very Good
1,539 reviews
EVA Air
8.5
Very Good
1,470 reviews
Check prices

Entertainment

8.0

Comfort

8.3

Crew

8.7

Boarding

8.4

Food

8.1

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!
Thai Airways
7.9
Good
406 reviews
EVA Air
8.5
Very Good
1,470 reviews
Check prices

Entertainment

8.0

Comfort

8.3

Crew

8.7

Boarding

8.4

Food

8.1

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!
Qatar Airways
7.4
Good
3,729 reviews
EVA Air
8.5
Very Good
1,470 reviews
Check prices

Entertainment

8.0

Comfort

8.3

Crew

8.7

Boarding

8.4

Food

8.1

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!
British Airways
6.7
Okay
8,034 reviews
EVA Air
8.5
Very Good
1,470 reviews
Check prices

Entertainment

8.0

Comfort

8.3

Crew

8.7

Boarding

8.4

Food

8.1

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!

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 £59, while return flights cost around £106.

  • How much is a return flight to Ko Samui?

    A return flight to Ko Samui will typically cost around £159, however they can be found for as little as £106.

  • 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 (16 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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How does Cheapflights help users find flights to Ko Samui?

Deals for Ko Samui flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose to your preference, such as price, airport, cabin class, and plenty of other options.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights to Ko Samui for you. Better yet — we are completely free to use.

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

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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