£296+ 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 15/3. Fares are subject to change and may not be available on all flights or dates of travel.
— USM
10 Jan — 17 Jan1
1 adult
1 adult, Economy, 0 bags

Flights to Ko Samui in 2025

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 11 December 2025.

Sun 28/1211:30LHR - USM
2 stops18h 05mMultiple Airlines
Wed 28/120:30USM - LHR
2 stops20h 25mMultiple Airlines
Deal found 8/12£854
Fri 12/1220:05LHR - USM
2 stops17h 20mMultiple Airlines
Tue 30/1221:15USM - LHR
2 stops27h 25mMultiple Airlines
Deal found 9/12£970
Thu 11/1213:30STN - USM
3 stops24h 50mMultiple Airlines
Fri 9/108:55USM - STN
3 stops41h 50mMultiple Airlines
Deal found 10/12£974
Sun 14/1223:20STN - USM
3 stops34h 50mMultiple Airlines
Sun 28/1219:45USM - STN
3 stops32h 00mMultiple Airlines
Deal found 9/12£1,008
Mon 29/1217:00LGW - USM
2 stops42h 50mMultiple Airlines
Wed 21/107:15USM - LGW
1 stop18h 15mMultiple Airlines
Deal found 8/12£1,011
Fri 12/1207:00LGW - USM
3 stops30h 50mMultiple Airlines
Tue 30/1208:55USM - LGW
2 stops27h 40mMultiple Airlines
Deal found 9/12£1,042
Sun 14/1218:40LHR - USM
2 stops19h 25mMultiple Airlines
Sun 28/1207:45USM - LHR
2 stops20h 55mMultiple Airlines
Deal found 9/12£1,047
Fri 12/1214:40LTN - USM
3 stops23h 10mMultiple Airlines
Tue 30/1217:05USM - LTN
3 stops35h 10mMultiple Airlines
Deal found 9/12£1,048
Thu 11/1208:30LGW - USM
3 stops29h 20mMultiple Airlines
Fri 9/108:55USM - LGW
3 stops32h 15mMultiple Airlines
Deal found 10/12£1,074
Sun 28/1211:50LHR - USM
1 stop15h 45mMultiple Airlines
Mon 19/117:25USM - LHR
1 stop20h 15mMultiple Airlines
Deal found 10/12£1,089
Mon 29/1217:00LGW - USM
2 stops42h 50mMultiple Airlines
Mon 26/109:00USM - LGW
1 stop16h 30mMultiple Airlines
Deal found 8/12£1,091
Mon 29/1217:00LGW - USM
2 stops42h 50mMultiple Airlines
Sat 24/107:55USM - LGW
1 stop17h 25mMultiple Airlines
Deal found 8/12£1,106

Find flight deals to Ko Samui

Find the latest flights to Ko Samui in 2025, 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 11 December 2025.

Return from

£740

One-way from

£326

Popular in

December

Cheapest in

May

Average price

£1,179
2/3-9/3
  • 2/3-9/3
  • 6 total stops
  • 72h 25m total
  • London to Ko Samui
30/1
  • 30/1
  • 3 total stops
  • 26h 45m total
  • London to Ko Samui
Highest demand for flights based on searches. 5% potential increase in price (£47 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£26 potential savings vs. average return price).
Average for return flights in December 2025

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 11 December 2025.
Use the filters below to find and compare flights to Ko Samui that are best for you.

Fly from

London

Route

Depart

Return

Price

LondonKo Samui

STN - USM

STNUSM

London Stansted

Sun 15/2

18:15-08:00

2 stops30h 45m

Ko Samui

Tue 3/3

19:00-23:50

3 stops35h 50m

£755

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Sun 15/2

07:05-20:50

3 stops30h 45m

Ko Samui

Tue 3/3

15:05-23:10

3 stops39h 05m

£758

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Wed 8/4

21:45-07:10

2 stops27h 25m

Ko Samui

Tue 28/4

14:30-18:45

2 stops34h 15m

£790

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Wed 8/4

21:45-07:10

2 stops27h 25m

Ko Samui

Sun 26/4

20:50-07:00

2 stops40h 10m

£790

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Wed 8/4

21:45-07:10

2 stops27h 25m

Ko Samui

Wed 29/4

19:10-15:15

2 stops26h 05m

£790

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Thu 4/6

14:45-21:35

2 stops24h 50m

Ko Samui

Mon 8/6

20:50-18:45

2 stops27h 55m

£800

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Sat 30/5

09:00-10:30

2 stops19h 30m

Ko Samui

Sat 27/6

15:25-06:40

2 stops21h 15m

£811

LondonKo Samui

STN - USM

STNUSM

London Stansted

Fri 9/1

07:30-18:50

3 stops28h 20m

Ko Samui

Fri 16/1

08:15-10:35

3 stops33h 20m

£812

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Mon 19/1

09:25-18:50

1 stop26h 25m

Ko Samui

Wed 28/1

18:05-06:25

1 stop19h 20m

£813

LondonKo Samui

STN - USM

STNUSM

London Stansted

Thu 19/2

06:10-15:10

3 stops26h 00m

Ko Samui

Thu 26/2

18:05-12:05

2 stops25h 00m

£820

Flights are sorted by cheapest return flights first.

Deals found on 8/12

Showing 1-10 of 60 results
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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 5 December 2025.

To ensure you get the cheapest price possible for a flight to Ko Samui, you should look to book at least 80 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 58 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.

When is the cheapest time to fly to Ko Samui?

Use this chart to determine the cheapest time to fly return from London to Ko Samui. Price data was last updated on 16 December 2024.

Users looking for the lowest fares to Ko Samui should consider flying on Wednesday at midday, when prices are typically cheapest. Budget-minded travellers will want to avoid Sunday evenings, when prices are usually at their highest.

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 11 December 2025.
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.

Comfort

8.3

Overall

8.5

Crew

8.6

Boarding

8.4

Entertainment

8.0

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

TPE - CRK

All was okay except for the medical emergency that happened before our boarding. I wish that the medical emergency response was more immediate.

Comfort

8.3

Overall

8.5

Crew

8.6

Boarding

8.4

Entertainment

8.0

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

TPE - CRK

All was okay except for the medical emergency that happened before our boarding. I wish that the medical emergency response was more immediate.

Comfort

8.3

Overall

8.5

Crew

8.6

Boarding

8.4

Entertainment

8.0

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

TPE - CRK

All was okay except for the medical emergency that happened before our boarding. I wish that the medical emergency response was more immediate.

Comfort

8.3

Overall

8.5

Crew

8.6

Boarding

8.4

Entertainment

8.0

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

TPE - CRK

All was okay except for the medical emergency that happened before our boarding. I wish that the medical emergency response was more immediate.

Comfort

8.3

Overall

8.5

Crew

8.6

Boarding

8.4

Entertainment

8.0

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

TPE - CRK

All was okay except for the medical emergency that happened before our boarding. I wish that the medical emergency response was more immediate.

Comfort

8.3

Overall

8.5

Crew

8.6

Boarding

8.4

Entertainment

8.0

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

TPE - CRK

All was okay except for the medical emergency that happened before our boarding. I wish that the medical emergency response was more immediate.

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 £56, while return flights cost around £83.

  • How much is a return flight to Ko Samui?

    A return flight to Ko Samui will typically cost around £176, however they can be found for as little as £83.

  • 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 15 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

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