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£283+ 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 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
— USM
17 Apr — 24 Apr1
1 adult

Flights to Ko Samui in 2025

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 12 April 2025.

Return from

£756

One-way from

£283

Popular in

December

Cheapest in

September

Average price

£1,080
Austrian Airlines
  • Austrian Airlines
  • 6/6-22/6
  • 4 total stops
  • 36h 05m total
  • London to Ko Samui
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3/6
  • 3/6
  • 3 total stops
  • 56h 25m total
  • London to Ko Samui
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£29 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£18 potential savings vs. average return price).
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Average for return flights in April 2025
Search Deals

Find flight deals to Ko Samui

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 12 April 2025.

Fri 6/619:30LHR - USM
2 stops17h 00mAustrian Airlines
Sun 22/619:15USM - LHR
2 stops19h 05mAustrian Airlines
Deal found 11/4£756
Wed 14/513:05LCY - USM
2 stops17h 40mSWISS
Thu 29/509:30USM - LCY
2 stops29h 20mSWISS
Deal found 11/4£759
Tue 22/410:00LHR - USM
2 stops25h 05mMultiple Airlines
Tue 6/508:20USM - LHR
2 stops28h 35mMultiple Airlines
Deal found 11/4£761
Fri 26/914:40LGW - USM
3 stops23h 50mMultiple Airlines
Sun 26/1007:00USM - LGW
2 stops30h 30mMultiple Airlines
Deal found 10/4£763
Wed 14/517:10LCY - USM
2 stops19h 05mKLM
Thu 22/508:45USM - LCY
2 stops28h 30mKLM
Deal found 11/4£765
Wed 14/521:35LHR - USM
1 stop16h 55mEVA Air
Thu 29/508:45USM - LHR
1 stop16h 35mEVA Air
Deal found 11/4£779
Tue 3/609:00LGW - USM
2 stops20h 55mQatar Airways
Tue 17/615:25USM - LGW
2 stops45h 15mQatar Airways
Deal found 11/4£782
Tue 20/513:45LHR - USM
2 stops18h 00mSWISS
Tue 3/616:25USM - LHR
2 stops25h 00mSWISS
Deal found 11/4£788
Wed 5/1110:55LHR - USM
1 stop24h 35mSingapore Airlines
Wed 19/1111:45USM - LHR
1 stop25h 10mSingapore Airlines
Deal found 11/4£796
Wed 29/1008:35LHR - USM
2 stops20h 20mQatar Airways
Mon 24/1118:15USM - LHR
2 stops24h 55mQatar Airways
Deal found 11/4£799
Wed 29/1014:05STN - USM
2 stops17h 50mEmirates
Mon 24/1115:35USM - STN
2 stops27h 30mEmirates
Deal found 11/4£814
Thu 15/518:40LGW - USM
2 stops20h 30mSWISS
Sun 15/616:25USM - LGW
2 stops31h 25mSWISS
Deal found 11/4£817

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 12 April 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

LHR - USM

LHRUSM

London Heathrow

Fri 6/6

19:30-18:30

2 stops17h 00m

Ko Samui

Sun 22/6

19:15-08:20

2 stops19h 05m

£756

LondonKo Samui

LCY - USM

LCYUSM

London City

Wed 14/5

13:05-12:45

2 stops17h 40m

Ko Samui

Thu 29/5

09:30-08:50

2 stops29h 20m

£759

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 22/4

10:00-17:05

2 stops25h 05m

Ko Samui

Tue 6/5

08:20-06:55

2 stops28h 35m

£761

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Fri 26/9

14:40-20:30

3 stops23h 50m

Ko Samui

Sun 26/10

07:00-07:30

2 stops30h 30m

£763

LondonKo Samui

LCY - USM

LCYUSM

London City

Wed 14/5

17:10-18:15

2 stops19h 05m

Ko Samui

Thu 22/5

08:45-07:15

2 stops28h 30m

£765

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Wed 14/5

21:35-20:30

1 stop16h 55m

Ko Samui

Thu 29/5

08:45-19:20

1 stop16h 35m

£779

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Tue 3/6

09:00-11:55

2 stops20h 55m

Ko Samui

Tue 17/6

15:25-06:40

2 stops45h 15m

£782

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 20/5

13:45-13:45

2 stops18h 00m

Ko Samui

Tue 3/6

16:25-11:25

2 stops25h 00m

£788

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Thu 15/5

18:40-21:10

2 stops20h 30m

Ko Samui

Sun 15/6

16:25-17:50

2 stops31h 25m

£817

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Fri 26/9

21:25-07:20

1 stop27h 55m

Ko Samui

Sun 26/10

07:55-20:35

1 stop18h 40m

£824

Flights are sorted by cheapest return flights first.

Deals found on 11/4

Showing 1-10 of 39 results
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3
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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 4 April 2025.

To ensure you get the cheapest price possible for a flight to Ko Samui, you should look to book at least 11 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 24 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 12 May 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 most popular airlines that fly to Ko Samui?

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

EVA Air

EVA Air

From £960

Thai Airways

Thai Airways

From £1,049

British Airways

British Airways

From £980

Singapore Airlines

Singapore Airlines

From £908

What are the cheapest airlines that fly to Ko Samui?

The cheapest airlines flying from London to Ko Samui are Air France, KLM and Etihad Airways.

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 12 April 2025.
To help decide which airline to fly to Ko Samui, see what other customers have to say about EVA Air, Singapore Airlines and Emirates. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very Good
1,174 reviews
Check prices

Entertainment

8.0

Food

8.1

Boarding

8.4

Comfort

8.3

Crew

8.6

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
EVA Air
8.4
Very Good
1,174 reviews
EVA Air
8.4
Very Good
1,174 reviews
Check prices

Entertainment

8.0

Food

8.1

Boarding

8.4

Comfort

8.3

Crew

8.6

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Singapore Airlines
8.1
Very Good
1,288 reviews
EVA Air
8.4
Very Good
1,174 reviews
Check prices

Entertainment

8.0

Food

8.1

Boarding

8.4

Comfort

8.3

Crew

8.6

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Emirates
8.0
Very Good
3,197 reviews
EVA Air
8.4
Very Good
1,174 reviews
Check prices

Entertainment

8.0

Food

8.1

Boarding

8.4

Comfort

8.3

Crew

8.6

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
KLM
7.8
Good
1,321 reviews
EVA Air
8.4
Very Good
1,174 reviews
Check prices

Entertainment

8.0

Food

8.1

Boarding

8.4

Comfort

8.3

Crew

8.6

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Thai Airways
7.7
Good
322 reviews
EVA Air
8.4
Very Good
1,174 reviews
Check prices

Entertainment

8.0

Food

8.1

Boarding

8.4

Comfort

8.3

Crew

8.6

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.

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, SWISS 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 £40, while return flights cost around £84.

  • How much is a return flight to Ko Samui?

    A return flight to Ko Samui will typically cost around £220, however they can be found for as little as £110.

  • 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 20 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 Tao
Ko Pha Ngan

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