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Ko Samui

$202+ 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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
CNX — USM
Sep 9 — Sep 161
Wed 9/9
Wed 9/16
1 adult, Economy
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Cheap 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 August 10, 2026.

This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Wed 9/98:35 pm -
1 stop10h 35m
Fri 9/188:55 am -
Nonstop1h 45m
Deal found 8/7$217
This Booking.com deal was found by Cheapflights users on 8/6. 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.
Fri 10/3010:10 am -
1 stop8h 45m
Sun 11/18:50 am -
Nonstop1h 50m
Deal found 8/6$222
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Fri 10/3010:50 pm -
1 stop8h 20m
Sun 11/88:50 am -
Nonstop1h 50m
Deal found 8/9$229
This Kiwi.com deal was found by Cheapflights users on 8/9. 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 10/3110:50 pm -
1 stop8h 20m
Sat 11/78:50 am -
Nonstop1h 50m
Deal found 8/9$232
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Fri 9/410:30 pm -
2 stops16h 20m
Fri 9/118:55 am -
Nonstop1h 45m
Deal found 8/7$241
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Fri 10/3012:20 pm -
1 stop4h 05m
Sat 11/78:50 am -
Nonstop1h 50m
Deal found 8/9$243
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Thu 9/1010:30 pm -
1 stop8h 40m
Sun 9/138:55 am -
Nonstop1h 45m
Deal found 8/7$248
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Fri 10/3011:30 am -
Nonstop1h 45m
Mon 11/98:50 am -
Nonstop1h 50m
Deal found 8/9$253
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Fri 10/3011:30 am -
Nonstop1h 45m
Sat 11/78:50 am -
Nonstop1h 50m
Deal found 8/9$256
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 9/18:35 pm -
2 stops22h 40m
Tue 9/158:55 am -
Nonstop1h 45m
Deal found 8/8$258

Find 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 August 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$217
(Kiwi.com)

One-way from

$202
(Kiwi.com)

Popular in

August

Cheapest in

June

Average price

$633

Good one-way deal

$280 or less
Provider with most accurate pricing for Chiang Mai-Ko Samui flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chiang Mai-Ko Samui flights.
Search Deals
From Chiang Mai to Ko Samui
Search Deals
One-way flight from Chiang Mai to Ko Samui
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a one-way flight from Chiang Mai to Ko Samui.
Search Deals

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 August 10, 2026.
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

Wed 9/9

8:35 pm-7:10 am

1 stop10h 35m

Ko Samui

Fri 9/18

8:55 am-10:40 am

Nonstop1h 45m

$217

Chiang MaiKo Samui

CNX Chiang Mai - USM Ko Samui

CNXUSM

Chiang Mai

Fri 10/30

2:25 pm-6:55 pm

1 stop4h 30m

Ko Samui

Sun 11/1

7:00 am-11:50 am

1 stop4h 50m

$277
Quickest round-trip

Chiang MaiKo Samui

CNX Chiang Mai - USM Ko Samui

CNXUSM

Chiang Mai

Wed 10/7

2:35 pm-6:30 pm

1 stop3h 55m

Ko Samui

Sun 10/11

8:55 am-10:40 am

Nonstop1h 45m

$286

Chiang MaiKo Samui

CNX Chiang Mai - USM Ko Samui

CNXUSM

Chiang Mai

Wed 1/13

12:10 pm-5:00 pm

1 stop4h 50m

Ko Samui

Wed 1/27

8:50 am-10:40 am

Nonstop1h 50m

$300

Chiang MaiKo Samui

CNX Chiang Mai - USM Ko Samui

CNXUSM

Chiang Mai

Fri 12/4

7:45 pm-7:10 am

1 stop11h 25m

Ko Samui

Mon 12/21

8:50 am-10:40 am

Nonstop1h 50m

$303

Chiang MaiKo Samui

CNX Chiang Mai - USM Ko Samui

CNXUSM

Chiang Mai

Sat 10/31

3:30 pm-7:50 pm

1 stop4h 20m

Ko Samui

Sun 11/8

3:35 pm-9:20 pm

1 stop5h 45m

$305

Chiang MaiKo Samui

CNX Chiang Mai - USM Ko Samui

CNXUSM

Chiang Mai

Mon 1/18

3:45 pm-9:20 pm

1 stop5h 35m

Ko Samui

Thu 1/28

7:00 am-11:50 am

1 stop4h 50m

$317

Chiang MaiKo Samui

CNX Chiang Mai - USM Ko Samui

CNXUSM

Chiang Mai

Wed 9/9

11:50 am-6:30 pm

1 stop6h 40m

Ko Samui

Sun 9/13

5:00 pm-9:55 pm

1 stop4h 55m

$339

Chiang MaiKo Samui

CNX Chiang Mai - USM Ko Samui

CNXUSM

Chiang Mai

Sat 9/5

2:30 pm-8:50 pm

1 stop6h 20m

Ko Samui

Wed 9/9

8:00 am-2:10 pm

1 stop6h 10m

$349

Chiang MaiKo Samui

CNX Chiang Mai - USM Ko Samui

CNXUSM

Chiang Mai

Sun 11/29

10:10 am-8:25 pm

1 stop10h 15m

Ko Samui

Thu 12/3

8:50 am-10:40 am

Nonstop1h 50m

$408

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/9

Showing 1-10 of 21 resultsSorted by cheapest first
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3

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 August.
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
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

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

Currently, June is the cheapest month in which you can book a flight from Chiang Mai to Ko Samui (average of $251). Flying from Chiang Mai to Ko Samui in August is currently the most expensive (average of $633). 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 August 10, 2026.

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 $491 and $709 in September.
The cheapest round-trip price found within the last 5 days was $217 on Multiple Airlines (Sep 9-Sep 18).

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 August 10, 2026.
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

Boarding

8.1

Food

7.3

Entertainment

6.3

Overall

8.1

Crew

8.6

Comfort

7.9

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

Boarding

8.1

Food

7.3

Entertainment

6.3

Overall

8.1

Crew

8.6

Comfort

7.9

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

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 9 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 $222, Bangkok Airways can have you in Ko Samui from Chiang Mai in 8h 45m. 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 ($212), offers the cheapest pricing from Chiang Mai to Ko Samui. Bangkok Airways is currently priced 49% below the average price you’ll pay for this route.

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

    Consider Bangkok Airways (77%), EVA Air (75%) or Thai Airways (75%) 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 $373, our data shows the cheapest flight currently is $221. 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, June is the cheapest month in which you can book a flight from Chiang Mai to Ko Samui (average of $251). Flying from Chiang Mai to Ko Samui in August is currently the most expensive (average of $633). 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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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 August 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
Bangkok AirwaysCheapest$212Average$420FlexibilityNo cancel feeOn-time74%

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