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Ko Samui

$159+ Cheap flights from Chiang Mai to Ko Samui (CNX - 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 4/19. Fares are subject to change and may not be available on all flights or dates of travel.
CNX — USM
Dec 12 — Dec 191
Fri 12/12
Fri 12/19
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

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Chiang Mai to Ko Samui are usually found in September or May, booked 34 days in advance, depart on a Thursday or Tuesday and return on a Monday

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 November 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$278
(Mytrip)

One-way from

$159
(Bangkok Airways)

Popular in

August

Cheapest in

September

Average price

$360

Good one-way deal

$276 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. 5% potential increase in price ($20 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 12, 2025.

This Mytrip deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/610:25 pmCNX - USM
1 stop9h 40mMultiple Airlines
Thu 12/118:50 amUSM - CNX
Nonstop1h 50mMultiple Airlines
Deal found 11/11$278
This Mytrip deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1810:50 pmCNX - USM
1 stop8h 55mMultiple Airlines
Mon 12/158:50 amUSM - CNX
Nonstop1h 50mMultiple Airlines
Deal found 11/10$287
This Bangkok Airways deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Bangkok Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1112:10 pmCNX - USM
1 stop5h 40mBangkok Airways
Sun 12/148:50 amUSM - CNX
Nonstop1h 50mBangkok Airways
Deal found 11/11$306
This Kiwi.com deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/97:45 pmCNX - USM
1 stop12h 00mBangkok Airways
Tue 12/168:50 amUSM - CNX
Nonstop1h 50mBangkok Airways
Deal found 11/11$311
This Kiwi.com deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/810:25 pmCNX - USM
1 stop9h 40mMultiple Airlines
Mon 12/158:50 amUSM - CNX
Nonstop1h 50mMultiple Airlines
Deal found 11/10$337
This Mytrip deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/116:55 pmCNX - USM
2 stops13h 30mMultiple Airlines
Tue 12/168:50 amUSM - CNX
Nonstop1h 50mMultiple Airlines
Deal found 11/12$343
This Booking.com deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/812:10 pmCNX - USM
1 stop8h 15mBangkok Airways
Mon 12/158:50 amUSM - CNX
Nonstop1h 50mBangkok Airways
Deal found 11/10$355
This ThaiVietJet deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure ThaiVietJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/910:25 pmCNX - USM
1 stop9h 20mMultiple Airlines
Tue 12/168:15 amUSM - CNX
1 stop7h 25mMultiple Airlines
Deal found 11/11$361
This Kiwi.com deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/611:30 amCNX - USM
Nonstop1h 45mBangkok Airways
Thu 12/118:50 amUSM - CNX
Nonstop1h 50mBangkok Airways
Deal found 11/11$369

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated November 12, 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

Sat 12/6

10:25 pm-8:05 am

1 stop9h 40m

Ko Samui

Thu 12/11

8:50 am-10:40 am

Nonstop1h 50m

$278

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Thu 4/9

8:00 pm-7:20 am

1 stop11h 20m

Ko Samui

Sun 4/12

8:55 am-10:40 am

Nonstop1h 45m

$291

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Thu 4/9

8:00 pm-7:20 am

1 stop11h 20m

Ko Samui

Sat 4/11

8:55 am-10:40 am

Nonstop1h 45m

$291

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Fri 4/10

2:35 pm-7:20 am

1 stop16h 45m

Ko Samui

Sun 4/12

8:55 am-10:40 am

Nonstop1h 45m

$295

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Thu 12/11

12:10 pm-5:50 pm

1 stop5h 40m

Ko Samui

Sun 12/14

8:50 am-10:40 am

Nonstop1h 50m

$306

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Tue 12/9

7:45 pm-7:45 am

1 stop12h 00m

Ko Samui

Tue 12/16

8:50 am-10:40 am

Nonstop1h 50m

$311

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Fri 2/20

10:10 am-7:10 am

1 stop21h 00m

Ko Samui

Sun 3/1

8:50 am-10:40 am

Nonstop1h 50m

$314

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Thu 4/9

11:55 am-8:30 pm

1 stop8h 35m

Ko Samui

Fri 4/10

8:55 am-10:40 am

Nonstop1h 45m

$325

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Wed 2/25

9:40 pm-7:10 am

1 stop9h 30m

Ko Samui

Sat 2/28

8:50 am-10:40 am

Nonstop1h 50m

$332

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Wed 2/25

9:40 pm-7:10 am

1 stop9h 30m

Ko Samui

Fri 2/27

8:50 am-10:40 am

Nonstop1h 50m

$332

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/10

Showing 1-10 of 21 results
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Compare providers for flights from Chiang Mai to Ko Samui

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
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 November.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
Trip.comPrice Accuracy2 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Chiang Mai-Ko Samui flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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
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 round-trip flight from Chiang Mai to Ko Samui. Price data was last updated on November 7, 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, April is the cheapest month in which you can book a flight from Chiang Mai to Ko Samui (average of $89). Flying from Chiang Mai to Ko Samui in January is currently the most expensive (average of $241). 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 November 12, 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 November 12, 2025.
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
8.0
Very good
117 reviews

Crew

8.5

Boarding

8.0

Overall

8.0

Food

7.3

Entertainment

6.2

Comfort

7.9

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
117 reviews
Bangkok Airways
8.0
Very good
117 reviews

Crew

8.5

Boarding

8.0

Overall

8.0

Food

7.3

Entertainment

6.2

Comfort

7.9

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?

    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 $291, Bangkok Airways can have you in Ko Samui from Chiang Mai in 11h 20m. The distance from Chiang Mai to Ko Samui is about 641 mi.

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

    According to our current data, Bangkok Airways ($170), offers the cheapest pricing from Chiang Mai to Ko Samui. Bangkok Airways is currently priced 54% 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 (93%), Thai Airways (93%) or Etihad Airways (93%) 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 $277, our data shows the cheapest flight currently is $255. 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, April is the cheapest month in which you can book a flight from Chiang Mai to Ko Samui (average of $89). Flying from Chiang Mai to Ko Samui in January is currently the most expensive (average of $241). 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

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Alternative routes for Chiang Mai to Ko Samui

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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 2,558,603 searches. Data last updated November 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Bangkok AirwaysCheapest$170Average$382FlexibilityNo cancel feeOn-time74%

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