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Ko Samui

$168+ Cheap flights from Chiang Mai to Ko Samui (CNX - USM)

CNX — USM
Oct 27 — Nov 31
Tue 10/27
Tue 11/3
1 adult, Economy
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Find cheap flights from Chiang Mai to Ko Samui with Cheapflights

1. Tell us where you want to go

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3. Compare prices and book

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Cheap flight deals from Chiang Mai to Ko Samui

Cheapest flights from Chiang Mai to Ko Samui

Thu 10/296:05 pm -
1 stop13h 40m
Mon 11/28:50 am -
Nonstop1h 50m
Deal found 9/24$231
Fri 11/67:45 pm -
1 stop12h 00m
Mon 11/98:50 am -
Nonstop1h 50m
Deal found 9/25$233
Wed 11/117:45 pm -
1 stop12h 25m
Wed 11/188:50 am -
Nonstop1h 50m
Deal found 9/26$235
Thu 10/2911:30 am -
Nonstop1h 45m
Mon 11/28:50 am -
Nonstop1h 50m
Deal found 9/25$255
Sun 11/88:30 am -
1 stop6h 15m
Sun 11/158:50 am -
Nonstop1h 50m
Deal found 9/23$263
Wed 10/218:25 am -
1 stop6h 30m
Wed 10/288:50 am -
Nonstop1h 50m
Deal found 9/23$265
Fri 11/68:40 pm -
1 stop11h 05m
Mon 11/94:35 pm -
1 stop5h 00m
Deal found 9/25$269
Thu 11/510:35 pm -
1 stop9h 00m
Tue 11/107:00 am -
1 stop4h 50m
Deal found 9/23$276

Find flight deals from Chiang Mai to Ko Samui

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$231
(Kiwi.com)

One-way from

$168
(CheapOair)

Popular in

December

Cheapest in

September

Average price

$172

Good round-trip deal

$453 or less

Good one-way deal

$280 or less
Provider with most accurate pricing for Chiang Mai-Ko Samui flight deals.
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Provider most trusted by Cheapflights users for Chiang Mai-Ko Samui flights.
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From Chiang Mai to Ko Samui
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One-way flight from Chiang Mai to Ko Samui
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Highest demand for flights based on searches. 15% potential increase in price ($77 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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Price to beat on a round-trip flight from Chiang Mai to Ko Samui.
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Price to beat on a one-way flight from Chiang Mai to Ko Samui.
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Chiang Mai to Ko Samui that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Chiang MaiKo Samui

CNX Chiang Mai - USM Ko Samui

CNXUSM

Chiang Mai

Sun 2/28

12:10 pm-9:20 pm

1 stop9h 10m

Ko Samui

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$173

Chiang MaiKo Samui

CNX Chiang Mai - USM Ko Samui

CNXUSM

Chiang Mai

Thu 2/18

12:10 pm-8:25 pm

1 stop8h 15m

Ko Samui

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$178

Chiang MaiKo Samui

CNX Chiang Mai - USM Ko Samui

CNXUSM

Chiang Mai

Mon 11/30

7:45 pm-7:10 am

1 stop11h 25m

Ko Samui

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$183

Chiang MaiKo Samui

CNX Chiang Mai - USM Ko Samui

CNXUSM

Chiang Mai

Fri 2/26

10:10 am-5:00 pm

1 stop6h 50m

Ko Samui

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$195

Chiang MaiKo Samui

CNX Chiang Mai - USM Ko Samui

CNXUSM

Chiang Mai

Sat 11/21

12:10 pm-8:25 pm

1 stop8h 15m

Ko Samui

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$215

Chiang MaiKo Samui

CNX Chiang Mai - USM Ko Samui

CNXUSM

Chiang Mai

Thu 10/29

6:05 pm-7:45 am

1 stop13h 40m

Ko Samui

Mon 11/2

8:50 am-10:40 am

Nonstop1h 50m

$231
Quickest round-trip

Chiang MaiKo Samui

CNX Chiang Mai - USM Ko Samui

CNXUSM

Chiang Mai

Thu 10/29

11:30 am-1:15 pm

Nonstop1h 45m

Ko Samui

Mon 11/2

8:50 am-10:40 am

Nonstop1h 50m

$255

Chiang MaiKo Samui

CNX Chiang Mai - USM Ko Samui

CNXUSM

Chiang Mai

Fri 11/6

8:40 pm-7:45 am

1 stop11h 05m

Ko Samui

Mon 11/9

4:35 pm-9:35 pm

1 stop5h 00m

$269

Chiang MaiKo Samui

CNX Chiang Mai - USM Ko Samui

CNXUSM

Chiang Mai

Thu 11/5

10:35 pm-7:35 am

1 stop9h 00m

Ko Samui

Tue 11/10

7:00 am-11:50 am

1 stop4h 50m

$276

Chiang MaiKo Samui

CNX Chiang Mai - USM Ko Samui

CNXUSM

Chiang Mai

Fri 11/6

10:10 am-3:40 pm

1 stop5h 30m

Ko Samui

Wed 11/11

8:50 am-10:40 am

Nonstop1h 50m

$315

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/27

Showing 1-10 of 11 resultsSorted by cheapest first
1
2

Compare providers for flights from Chiang Mai to Ko Samui

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Chiang Mai to Ko Samui in September.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
BudgetAirPrice Accuracy2 starsTrust Score*3 stars
Trip.comPrice Accuracy1 starTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Chiang Mai-Ko Samui flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chiang Mai-Ko Samui flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chiang Mai-Ko Samui flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chiang Mai-Ko Samui flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chiang Mai-Ko Samui flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip price

Cheapflights Insights

Everything you need to know about your flight from Chiang Mai to Ko Samui

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

Currently, September is the cheapest month in which you can book a flight from Chiang Mai to Ko Samui (average of $172). Flying from Chiang Mai to Ko Samui in December is currently the most expensive (average of $580). 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?

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.

How much does it cost to fly round-trip from Chiang Mai to Ko Samui?

Airfare is below average for this route at the moment.

Chiang Mai to Ko Samui flights typically cost between $310 and $397 in October.
The cheapest round-trip price found within the last 5 days was $231 on Multiple Airlines (Oct 29-Nov 2).

Reviews of airlines servicing Ko Samui

Get a feel of what it's like to fly with Bangkok Airways from Chiang Mai to Ko Samui by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Bangkok Airways
8.1
Very good
133 reviews

Crew

8.6

Entertainment

6.3

Comfort

7.9

Food

7.3

Overall

8.1

Boarding

8.1

Reviews

1 / 8
10.0
Excellent

Agata,Feb 2026

USM - DMK

Great short flight and free really good snack and water which I didn’t expect
Bangkok Airways
8.1
Very good
133 reviews
Bangkok Airways
8.1
Very good
133 reviews

Crew

8.6

Entertainment

6.3

Comfort

7.9

Food

7.3

Overall

8.1

Boarding

8.1

Reviews

1 / 8
10.0
Excellent

Agata,Feb 2026

USM - DMK

Great short flight and free really good snack and water which I didn’t expect

Related info for your journey

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

    You will need to book a flight from Chiang Mai to Ko Samui if you want to fly from Chiang Mai to Ko Samui. At least 1 airline has flights from Chiang Mai (CNX) to Ko Samui (USM) on a regular basis. There are 6 flights to Ko Samui from the Chiang Mai airport per day. If you manage to book one that is nonstop, then you can expect the flight time from CNX to USM to be around 19h 30m.

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

    Flights from Chiang Mai to Ko Samui have been viewed 1 times in the past calendar month.

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

    For as low as $255, Bangkok Airways can have you in Ko Samui from Chiang Mai in 1h 45m. The distance from Chiang Mai to Ko Samui is about 641 mi. All flights are typically nonstop.

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

    According to our current data, Bangkok Airways ($173), offers the cheapest pricing from Chiang Mai to Ko Samui. Bangkok Airways is currently priced 57% below the average price you’ll pay for this route.

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

    Consider EVA Air (83%), Thai Airways (83%) or Etihad Airways (83%) when booking your flight. These represent the most reliable airlines when flying from Chiang Mai to Ko Samui.

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

    While on average a flight from Chiang Mai to Ko Samui is generally $375, our data shows the cheapest flight currently is $254. When looking at the most popular route, (Chiang Mai - Ko Samui), you can expect to pay $586 for that flight.

  • 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 vacation 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, September is the cheapest month in which you can book a flight from Chiang Mai to Ko Samui (average of $172). Flying from Chiang Mai to Ko Samui in December is currently the most expensive (average of $580). 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

Traveling 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

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Chiang Mai to Ko Samui

AirlineCheapestAverageFlexibilityOn-time
Bangkok AirwaysCheapest$173Average$435FlexibilityNo cancel feeOn-time74%

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