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£303+ Cheap flights to Ko Samui (USM)

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 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
— USM
23 May — 30 May1
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 23 April 2026.

Mon 21/918:00
LGW
-
USM
2 stops21h 35m
Multiple Airlines
Fri 16/1010:05
USM
-
LGW
3 stops27h 20m
Multiple Airlines
Deal found 19/4£753
Sat 9/520:45
LHR
-
USM
2 stops18h 50m
Multiple Airlines
Fri 22/512:10
USM
-
LHR
2 stops30h 35m
Multiple Airlines
Deal found 19/4£753
Sun 20/906:45
LTN
-
USM
3 stops28h 10m
Multiple Airlines
Wed 14/1007:50
USM
-
LTN
3 stops40h 15m
Multiple Airlines
Deal found 21/4£753
Sat 9/512:05
LGW
-
USM
3 stops27h 30m
Multiple Airlines
Fri 22/506:00
USM
-
LGW
3 stops23h 10m
Multiple Airlines
Deal found 19/4£754
Tue 12/509:30
LHR
-
USM
2 stops19h 00m
Multiple Airlines
Sat 23/517:55
USM
-
LHR
2 stops24h 50m
Multiple Airlines
Deal found 19/4£754
Tue 21/420:45
LHR
-
USM
2 stops28h 45m
Multiple Airlines
Tue 28/406:00
USM
-
LHR
2 stops19h 20m
Multiple Airlines
Deal found 20/4£755
Mon 27/406:20
STN
-
USM
3 stops29h 40m
Multiple Airlines
Fri 8/508:00
USM
-
STN
3 stops46h 40m
Multiple Airlines
Deal found 20/4£756
Mon 27/420:25
LHR
-
USM
2 stops32h 05m
Multiple Airlines
Fri 8/517:55
USM
-
LHR
2 stops32h 30m
Multiple Airlines
Deal found 20/4£756
Fri 28/814:45
LHR
-
USM
2 stops17h 55m
Multiple Airlines
Sat 12/919:00
USM
-
LHR
2 stops23h 45m
Multiple Airlines
Deal found 20/4£756
Sun 21/614:45
LHR
-
USM
2 stops23h 40m
Multiple Airlines
Sun 5/708:40
USM
-
LHR
2 stops28h 15m
Multiple Airlines
Deal found 19/4£757
Thu 1/1015:50
LTN
-
USM
3 stops23h 45m
Multiple Airlines
Sat 10/1007:50
USM
-
LTN
3 stops36h 25m
Multiple Airlines
Deal found 19/4£757
Thu 11/609:15
LGW
-
USM
2 stops25h 40m
Qatar Airways
Mon 29/617:55
USM
-
LGW
2 stops18h 45m
Qatar Airways
Deal found 19/4£759

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 23 April 2026.

Return from

£753

One-way from

£303

Popular in

December

Cheapest in

November

Average price

£901
21/9-16/10
  • 21/9-16/10
  • 5 total stops
  • 48h 55m total
  • London to Ko Samui
Search Deals
12/5
  • 12/5
  • 3 total stops
  • 43h 00m total
  • London to Ko Samui
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£77 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£37 potential savings vs. average return price).
Search Deals
Average for return flights in April 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 23 April 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

LTN - USM

LTNUSM

London Luton

Sun 20/9

06:45-16:55

3 stops28h 10m

Ko Samui

Wed 14/10

07:50-18:05

3 stops40h 15m

£753

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Thu 1/10

15:50-21:35

3 stops23h 45m

Ko Samui

Sat 10/10

07:50-14:15

3 stops36h 25m

£757

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Mon 21/9

12:25-15:45

3 stops21h 20m

Ko Samui

Thu 15/10

07:50-14:35

3 stops36h 45m

£774

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 15/6

14:45-14:45

2 stops18h 00m

Ko Samui

Tue 7/7

19:00-12:45

2 stops23h 45m

£783

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Wed 2/9

09:30-12:45

2 stops21h 15m

Ko Samui

Thu 10/9

06:00-18:45

2 stops18h 45m

£792

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Thu 17/9

18:05-21:35

3 stops21h 30m

Ko Samui

Mon 21/9

14:00-14:35

3 stops30h 35m

£793

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 26/5

15:05-16:55

2 stops19h 50m

Ko Samui

Sat 27/6

17:55-06:25

2 stops18h 30m

£795

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 9/6

20:50-21:35

2 stops18h 45m

Ko Samui

Mon 29/6

11:25-07:00

2 stops25h 35m

£804

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Sun 5/7

15:15-07:10

3 stops33h 55m

Ko Samui

Sun 19/7

17:25-19:55

3 stops32h 30m

£805

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Mon 8/6

09:15-10:45

2 stops19h 30m

Ko Samui

Mon 22/6

17:55-06:40

2 stops18h 45m

£810

Flights are sorted by cheapest return flights first.

Deals found on 22/4

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

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

Use this chart to determine the optimal time to book a return flight from London to Ko Samui. Price data was last updated on 17 April 2026.

To ensure you get the cheapest price possible for a flight to Ko Samui, you should look to book at least 89 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.

How long is the flight to Ko Samui?

On average, a flight from London to Ko Samui takes 18 hours 54 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 £747
EVA Air
EVA Air
From £714
Singapore Airlines
Singapore Airlines
From £739
Qatar Airways
Qatar Airways
From £748

What are the cheapest airlines that fly to Ko Samui?

The cheapest airlines flying from London to Ko Samui are Bangkok Airways, Air India 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).

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 23 April 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
1,422 reviews
Check prices

Food

8.1

Entertainment

8.0

Crew

8.6

Boarding

8.4

Overall

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

TPE - SFO

Why when we’re about to board they suddenly announced the letters ABC to board first .. so what is the use us waiting at the door (with wheelchairs) ended up almost at the end to board and I can see people walking boarding first? Is this something new? You go by letters now?
EVA Air
8.5
Very Good
1,422 reviews
EVA Air
8.5
Very Good
1,422 reviews
Check prices

Food

8.1

Entertainment

8.0

Crew

8.6

Boarding

8.4

Overall

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

TPE - SFO

Why when we’re about to board they suddenly announced the letters ABC to board first .. so what is the use us waiting at the door (with wheelchairs) ended up almost at the end to board and I can see people walking boarding first? Is this something new? You go by letters now?
Singapore Airlines
8.2
Very Good
1,502 reviews
EVA Air
8.5
Very Good
1,422 reviews
Check prices

Food

8.1

Entertainment

8.0

Crew

8.6

Boarding

8.4

Overall

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

TPE - SFO

Why when we’re about to board they suddenly announced the letters ABC to board first .. so what is the use us waiting at the door (with wheelchairs) ended up almost at the end to board and I can see people walking boarding first? Is this something new? You go by letters now?
Thai Airways
7.9
Good
401 reviews
EVA Air
8.5
Very Good
1,422 reviews
Check prices

Food

8.1

Entertainment

8.0

Crew

8.6

Boarding

8.4

Overall

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

TPE - SFO

Why when we’re about to board they suddenly announced the letters ABC to board first .. so what is the use us waiting at the door (with wheelchairs) ended up almost at the end to board and I can see people walking boarding first? Is this something new? You go by letters now?
Qatar Airways
7.4
Good
3,729 reviews
EVA Air
8.5
Very Good
1,422 reviews
Check prices

Food

8.1

Entertainment

8.0

Crew

8.6

Boarding

8.4

Overall

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

TPE - SFO

Why when we’re about to board they suddenly announced the letters ABC to board first .. so what is the use us waiting at the door (with wheelchairs) ended up almost at the end to board and I can see people walking boarding first? Is this something new? You go by letters now?
British Airways
6.7
Okay
7,910 reviews
EVA Air
8.5
Very Good
1,422 reviews
Check prices

Food

8.1

Entertainment

8.0

Crew

8.6

Boarding

8.4

Overall

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

TPE - SFO

Why when we’re about to board they suddenly announced the letters ABC to board first .. so what is the use us waiting at the door (with wheelchairs) ended up almost at the end to board and I can see people walking boarding first? Is this something new? You go by letters now?

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 £55, while return flights cost around £100.

  • How much is a return flight to Ko Samui?

    A return flight to Ko Samui will typically cost around £121, however they can be found for as little as £100.

  • 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 25 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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