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Cheap flights from Chiang Mai to Ko Samui from £99

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 13/11. Fares are subject to change and may not be available on all flights or dates of travel.
CNX — USM
16 Oct — 23 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Chiang Mai to Ko Samui

Discover tips and strategies to find the most affordable flight options for your journey from Chiang Mai (CNX) to Ko Samui (USM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 16 September 2025.

Round-trip from

£191

One-way from

£99

Popular in

August

Cheapest in

May

Average price

£232

Good one-way deal

£161 or less
Bangkok Airways
  • Bangkok Airways
  • 13/3-19/3
  • 1 total stop
  • 7h 30m total
  • Chiang Mai to Ko Samui
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Bangkok Airways
  • Bangkok Airways
  • 13/11
  • 1 total stop
  • 11h 25m total
  • Chiang Mai to Ko Samui
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£20 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£6 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Price to beat on a one-way flight from Chiang Mai to Ko Samui.
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Find flight deals from Chiang Mai to Ko Samui

Cheapest flights from Chiang Mai to Ko Samui
Explore the most affordable flight options available from Chiang Mai to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 September 2025.

Thu 2/1011:55CNX - USM
1 stop5h 10mBangkok Airways
Mon 6/1007:00USM - CNX
1 stop4h 15mBangkok Airways
Deal found 16/9£217
Wed 29/1020:50CNX - USM
1 stop10h 20mMultiple Airlines
Wed 5/1108:55USM - CNX
2 stops29h 40mMultiple Airlines
Deal found 14/9£227
Fri 24/1014:35CNX - USM
1 stop5h 55mBangkok Airways
Fri 31/1008:50USM - CNX
Nonstop1h 50mBangkok Airways
Deal found 15/9£245
Mon 8/1222:50CNX - USM
1 stop8h 40mMultiple Airlines
Fri 12/1208:50USM - CNX
Nonstop1h 50mMultiple Airlines
Deal found 14/9£255
Mon 8/1222:50CNX - USM
1 stop9h 20mMultiple Airlines
Thu 11/1208:50USM - CNX
Nonstop1h 50mMultiple Airlines
Deal found 14/9£256
Tue 9/1210:10CNX - USM
1 stop11h 10mBangkok Airways
Thu 11/1208:50USM - CNX
Nonstop1h 50mBangkok Airways
Deal found 15/9£258
Tue 9/1206:20CNX - USM
2 stops7h 30mMultiple Airlines
Thu 11/1208:50USM - CNX
Nonstop1h 50mMultiple Airlines
Deal found 15/9£277

Cheapflights Fare Finder

 
Customise your flight search to find flights from Chiang Mai to Ko Samui that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 16 September 2025.
Use the filters below to find and compare flights from Chiang Mai to Ko Samui that are best for you.

Fly from

Chiang Mai

Fly to

Ko Samui

Route

Depart

Return

Price

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Fri 13/3

12:10-17:50

1 stop5h 40m

Ko Samui

Thu 19/3

08:50-10:40

Nonstop1h 50m

£191

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Wed 11/2

21:40-07:10

1 stop9h 30m

Ko Samui

Mon 16/2

08:50-10:40

Nonstop1h 50m

£209

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Thu 12/2

21:40-07:10

1 stop9h 30m

Ko Samui

Mon 16/2

08:50-10:40

Nonstop1h 50m

£209

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Tue 10/2

21:40-07:10

1 stop9h 30m

Ko Samui

Sun 15/2

08:50-10:40

Nonstop1h 50m

£209

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Wed 11/2

21:40-07:10

1 stop9h 30m

Ko Samui

Tue 17/2

08:50-10:40

Nonstop1h 50m

£209

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Thu 12/2

21:40-07:10

1 stop9h 30m

Ko Samui

Sun 15/2

08:50-10:40

Nonstop1h 50m

£209

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Tue 10/2

21:40-07:10

1 stop9h 30m

Ko Samui

Tue 17/2

08:50-10:40

Nonstop1h 50m

£209

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Thu 2/10

11:55-17:05

1 stop5h 10m

Ko Samui

Mon 6/10

07:00-11:15

1 stop4h 15m

£217

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Fri 13/2

21:40-07:10

1 stop9h 30m

Ko Samui

Mon 16/2

08:50-10:40

Nonstop1h 50m

£219

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Tue 10/2

21:40-07:10

1 stop9h 30m

Ko Samui

Thu 19/2

08:50-10:40

Nonstop1h 50m

£222

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 19 results
1
2

Best time to book a flight from Chiang Mai to Ko Samui

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

How far ahead should I book a flight from Chiang Mai to Ko Samui?

Use this chart to determine the optimal time to book a return flight from Chiang Mai to Ko Samui. Price data was last updated on 12 September 2025.

Booking 34 days in advance of your planned departure date is, on average, the best time to get cheap flights from Chiang Mai to Ko Samui. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Chiang Mai to Ko Samui?

Currently, August is the cheapest month in which you can book a flight from Chiang Mai to Ko Samui (average of £1,019). Flying from Chiang Mai to Ko Samui in December is currently the most expensive (average of £1,669). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CNX to USM?

Find hourly flight availability from Chiang Mai to Ko Samui. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 16 September 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Chiang Mai to Ko Samui as you normally would.

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 16 September 2025.
See what other customers who have flown with Bangkok Airways from Chiang Mai to Ko Samui have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Bangkok Airways
8.0
Very Good
113 reviews
Check prices

Boarding

8.0

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.2

Entertainment

6.2

Reviews

1 / 7
10.0
Excellent

Douglas,May 2025

USM - HKG

Flight was as expected: up and down at the right time and location without drama. Kayak needs to modify this survey to allow for “N/A.” For example, we didn’t use the entertainment system but are forced to rate it. In this case, the results are skewed and may lead to incorrect assumptions.
Bangkok Airways
8.0
Very Good
113 reviews
Bangkok Airways
8.0
Very Good
113 reviews
Check prices

Boarding

8.0

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.2

Entertainment

6.2

Reviews

1 / 7
10.0
Excellent

Douglas,May 2025

USM - HKG

Flight was as expected: up and down at the right time and location without drama. Kayak needs to modify this survey to allow for “N/A.” For example, we didn’t use the entertainment system but are forced to rate it. In this case, the results are skewed and may lead to incorrect assumptions.

Related info for your journey

Find useful and relevant information for your journey from Chiang Mai to Ko Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Chiang Mai to Ko Samui?

    Ko Samui is the airport most travelers will use when flying to Ko Samui from Chiang Mai. Booking flights from Chiang Mai (CNX) to Ko Samui (USM) should be relatively easy as there are 7 daily flights to Ko Samui from 1 airline. 6h 00m is how long a flight from Chiang Mai to Ko Samui will take if you book a nonstop flight.

  • How popular is this Chiang Mai to Ko Samui flight route?

    Flights from Chiang Mai to Ko Samui have been viewed 3 times in the past calendar month.

  • How long is the flight from Chiang Mai to Ko Samui?

    Bangkok Airways can get you from Chiang Mai to Ko Samui in just under 5h 40m. Your travel time can differ by up to . Chiang Mai and Ko Samui are separated by a distance of 641 mi.

  • What is the cheapest airline to fly from Chiang Mai to Ko Samui round-trip?

    Our cheapest airline available from Chiang Mai to Ko Samui is Bangkok Airways. Our recent data shows that you can find tickets from as low as £140 on this airline. Bangkok Airways is currently priced 48% below the average price you’ll pay for this route.

  • What are the most reliable airlines from Chiang Mai to Ko Samui?

    No one likes to see their flight delayed. When booking a flight from Chiang Mai to Ko Samui consider choosing Bangkok Airways (96%), EVA Air (92%) or Qatar Airways (92%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Chiang Mai to Ko Samui?

    Looking for the cheapest flight from Chiang Mai to Ko Samui? While on average our users pay £199, our data indicates the cheapest price to be £107. The most popular route (Chiang Mai - Ko Samui), is priced around £363.

  • Can I find deals for flights from Chiang Mai to Ko Samui that include hotel bookings?

    Yes. In addition to deals on Chiang Mai to Ko Samui flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Chiang Mai to Ko Samui?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chiang Mai to Ko Samui.

  • Can I find deals for business class flights from Chiang Mai to Ko Samui?

    Yes. Cheapflights offers flight deals from Chiang Mai to Ko Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Chiang Mai to Ko Samui?

    Currently, August is the cheapest month in which you can book a flight from Chiang Mai to Ko Samui (average of £1,019). Flying from Chiang Mai to Ko Samui in December is currently the most expensive (average of £1,669). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Chiang Mai to Ko Samui

See prices for flight routes from nearby airports that may be better suited for you.
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Phuket City to Ko Samui flights
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Phuket City to Suvarnabhumi flights
Ko Samui to Suvarnabhumi flights
Krabi to Suvarnabhumi flights
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Chiang Mai to Phuket City flights
Suvarnabhumi to Krabi flights
Chiang Mai to Suvarnabhumi flights
Suvarnabhumi to Udon Thani flights
Don Mueang Intl to Phuket City flights
Suvarnabhumi to Surat Thani flights
Suvarnabhumi to Khon Kaen flights
Krabi to Chiang Mai flights
Udon Thani to Suvarnabhumi flights

Top airline flying from Chiang Mai to Ko Samui

Discover the top airline that operate flights from Chiang Mai to Ko Samui. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 16 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Bangkok AirwaysCheapest£140Average£272FlexibilityNo cancel feeOn-time74%
Search Bangkok Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Chiang Mai to Ko Samui?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Ko Samui from Chiang Mai today with Cheapflights!

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

Cheapflights helps you find that perfect flight to Ko Samui from Chiang Mai by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Need flexible booking options for your flight to Ko Samui from Chiang Mai? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Chiang Mai to Ko Samui become cheaper?

Yes, Cheapflights offers price alerts on Chiang Mai to Ko Samui flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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