HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ko Samui

$190+ 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 1/26. Fares are subject to change and may not be available on all flights or dates of travel.
CNX — USM
Jan 28 — Feb 41
Wed 1/28
Wed 2/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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

Best flights from Chiang Mai to Ko Samui
Discover carefully curated flight deals from Chiang Mai to Ko Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 29, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/27. 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 5/51:50 pmCNX - USM
1 stop3h 55mMultiple Airlines
Tue 5/128:55 amUSM - CNX
Nonstop1h 45mMultiple Airlines
Deal found 12/27$231
This Booking.com deal was found by Cheapflights users on 12/27. 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.
Wed 2/49:40 pmCNX - USM
1 stop9h 20mBangkok Airways
Wed 2/118:50 amUSM - CNX
Nonstop1h 50mBangkok Airways
Deal found 12/27$343
This Trip.com deal was found by Cheapflights users on 12/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/256:30 amCNX - USM
1 stop13h 15mMultiple Airlines
Sun 2/18:50 amUSM - CNX
Nonstop1h 50mMultiple Airlines
Deal found 12/28$341
This Kiwi.com deal was found by Cheapflights users on 12/28. 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 2/59:40 pmCNX - USM
1 stop10h 05mBangkok Airways
Mon 2/98:50 amUSM - CNX
Nonstop1h 50mBangkok Airways
Deal found 12/28$355
This ThaiVietJet deal was found by Cheapflights users on 12/26. 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.
Thu 1/2210:25 pmCNX - USM
1 stop9h 10mMultiple Airlines
Mon 1/268:15 amUSM - CNX
1 stop7h 25mMultiple Airlines
Deal found 12/26$352
This Bangkok Airways deal was found by Cheapflights users on 12/27. 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 1/810:10 amCNX - USM
1 stop8h 30mBangkok Airways
Thu 1/228:50 amUSM - CNX
Nonstop1h 50mBangkok Airways
Deal found 12/27$400
This ThaiVietJet deal was found by Cheapflights users on 12/27. 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.
Sat 1/2410:25 pmCNX - USM
1 stop9h 10mMultiple Airlines
Sat 1/319:20 amUSM - CNX
1 stop6h 20mMultiple Airlines
Deal found 12/27$365
This Kiwi.com deal was found by Cheapflights users on 12/27. 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 2/411:40 amCNX - USM
2 stops9h 10mMultiple Airlines
Wed 2/118:50 amUSM - CNX
Nonstop1h 50mMultiple Airlines
Deal found 12/27$379
This ThaiVietJet deal was found by Cheapflights users on 12/27. 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.
Mon 1/1210:25 pmCNX - USM
1 stop9h 05mMultiple Airlines
Wed 1/148:15 amUSM - CNX
1 stop7h 25mMultiple Airlines
Deal found 12/27$380
This ThaiVietJet deal was found by Cheapflights users on 12/28. 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.
Thu 1/810:25 pmCNX - USM
1 stop9h 10mMultiple Airlines
Mon 1/126:30 pmUSM - CNX
1 stop5h 05mMultiple Airlines
Deal found 12/28$402

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 December 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$231
(Kiwi.com)

One-way from

$190
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$580

Good one-way deal

$281 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. 14% potential increase in price ($63 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 29, 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

Tue 5/5

1:50 pm-5:45 pm

1 stop3h 55m

Ko Samui

Tue 5/12

8:55 am-10:40 am

Nonstop1h 45m

$231

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Sun 1/25

6:30 am-7:45 pm

1 stop13h 15m

Ko Samui

Sun 2/1

8:50 am-10:40 am

Nonstop1h 50m

$341

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Wed 2/4

9:40 pm-7:00 am

1 stop9h 20m

Ko Samui

Wed 2/11

8:50 am-10:40 am

Nonstop1h 50m

$343

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Thu 1/22

10:25 pm-7:35 am

1 stop9h 10m

Ko Samui

Mon 1/26

8:15 am-3:40 pm

1 stop7h 25m

$352

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Thu 2/5

9:40 pm-7:45 am

1 stop10h 05m

Ko Samui

Mon 2/9

8:50 am-10:40 am

Nonstop1h 50m

$355

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Sat 1/24

10:25 pm-7:35 am

1 stop9h 10m

Ko Samui

Sat 1/31

9:20 am-3:40 pm

1 stop6h 20m

$365

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Wed 2/4

11:40 am-8:50 pm

2 stops9h 10m

Ko Samui

Wed 2/11

8:50 am-10:40 am

Nonstop1h 50m

$379

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Mon 1/12

10:25 pm-7:30 am

1 stop9h 05m

Ko Samui

Wed 1/14

8:15 am-3:40 pm

1 stop7h 25m

$380

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Thu 1/8

10:10 am-6:40 pm

1 stop8h 30m

Ko Samui

Thu 1/22

8:50 am-10:40 am

Nonstop1h 50m

$400

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Thu 1/8

10:25 pm-7:35 am

1 stop9h 10m

Ko Samui

Mon 1/12

6:30 pm-11:35 pm

1 stop5h 05m

$402

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

Showing 1-10 of 21 results
1
2
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 December.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*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 December 26, 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 $190). 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 December 29, 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.

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

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 December 29, 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
118 reviews

Overall

8.0

Crew

8.5

Entertainment

6.3

Food

7.3

Boarding

8.0

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
118 reviews
Bangkok Airways
8.0
Very good
118 reviews

Overall

8.0

Crew

8.5

Entertainment

6.3

Food

7.3

Boarding

8.0

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 $233, 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 ($186), offers the cheapest pricing from Chiang Mai to Ko Samui. Bangkok Airways is currently priced 51% 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 (96%), EVA Air (92%) or Thai Airways (92%) 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 $288, our data shows the cheapest flight currently is $136. 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 $190). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Chiang Mai to Ko Samui

See prices for flight routes from nearby airports that may be better suited for you.
Don Mueang Intl to Krabi flights
Don Mueang Intl to Chiang Mai flights
Don Mueang Intl to Phuket City flights
Suvarnabhumi to Ko Samui flights
Suvarnabhumi to Chiang Mai flights
Suvarnabhumi to Krabi flights
Chiang Mai to Don Mueang Intl flights
Hat Yai to Suvarnabhumi flights
Phuket City to Chiang Mai flights
Phuket City to Suvarnabhumi flights
Chiang Rai to Suvarnabhumi flights
Suvarnabhumi to Ubon Ratchathani flights
Krabi to Don Mueang Intl flights
Rayong to Phuket City flights
Suvarnabhumi to Phuket City flights
Phuket City to Don Mueang Intl flights
Chiang Mai to Suvarnabhumi flights
Suvarnabhumi to Khon Kaen flights
Krabi to Suvarnabhumi flights
Ko Samui to Chiang Mai flights
Ko Samui to Suvarnabhumi flights
Suvarnabhumi to Chiang Rai flights
Suvarnabhumi to Udon Thani flights
Suvarnabhumi to Hat Yai flights
Suvarnabhumi to Surat Thani flights
Phuket City to Ko Samui flights
Phuket City to Rayong flights
Krabi to Chiang Mai flights
Krabi to Ko Samui flights
Chiang Mai to Surat Thani flights
Surat Thani to Suvarnabhumi flights
Surat Thani to Chiang Mai flights
Chiang Mai to Krabi flights
Chiang Mai to Phuket City flights
Ko Samui to Phuket City 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 2,558,603 searches. Data last updated December 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Bangkok AirwaysCheapest$186Average$380FlexibilityNo cancel feeOn-time74%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.