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Ko Samui

$158+ 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
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from Chiang Mai to Ko Samui are usually found in May or September, booked 40 days in advance, depart on a Thursday or Wednesday 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 August 14, 2025.

Round-trip from

$231
(Bangkok Airways)

One-way from

$158
(Kiwi.com)

Popular in

August

Cheapest in

May

Average price

$507

Good round-trip deal

$450 or less

Good one-way deal

$250 or less
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. 10% potential increase in price ($44 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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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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 August 14, 2025.

This Bangkok Airways deal was found by Cheapflights users on 8/14. 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.
Tue 11/1110:10 amCNX - USM
1 stop5h 30mBangkok Airways
Sat 11/157:00 amUSM - CNX
1 stop4h 20mBangkok Airways
Deal found 8/14$231
This Trip.com deal was found by Cheapflights users on 8/13. 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.
Wed 9/178:00 pmCNX - USM
1 stop12h 15mBangkok Airways
Tue 9/238:55 amUSM - CNX
Nonstop1h 45mBangkok Airways
Deal found 8/13$234
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 9/232:00 pmCNX - USM
1 stop5h 45mMultiple Airlines
Tue 9/307:00 amUSM - CNX
1 stop4h 20mMultiple Airlines
Deal found 8/14$252
This Booking.com deal was found by Cheapflights users on 8/13. 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.
Thu 9/1110:10 amCNX - USM
1 stop6h 55mBangkok Airways
Sun 9/148:55 amUSM - CNX
Nonstop1h 45mBangkok Airways
Deal found 8/13$257
This Bangkok Airways deal was found by Cheapflights users on 8/13. 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.
Mon 9/810:10 amCNX - USM
1 stop4h 35mBangkok Airways
Fri 9/128:55 amUSM - CNX
Nonstop1h 45mBangkok Airways
Deal found 8/13$258
This Bangkok Airways deal was found by Cheapflights users on 8/14. 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.
Fri 8/2911:55 amCNX - USM
1 stop4h 20mBangkok Airways
Tue 9/28:55 amUSM - CNX
Nonstop1h 45mBangkok Airways
Deal found 8/14$266
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 9/1112:40 pmCNX - USM
1 stop5h 45mMultiple Airlines
Sun 9/1411:10 amUSM - CNX
1 stop5h 15mMultiple Airlines
Deal found 8/13$273
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 9/171:30 pmCNX - USM
2 stops6h 55mMultiple Airlines
Tue 9/235:25 pmUSM - CNX
1 stop4h 30mMultiple Airlines
Deal found 8/13$304
This Booking.com deal was found by Cheapflights users on 8/14. 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.
Sat 9/62:35 pmCNX - USM
1 stop5h 50mBangkok Airways
Tue 9/98:55 amUSM - CNX
Nonstop1h 45mBangkok Airways
Deal found 8/14$326
This Bangkok Airways deal was found by Cheapflights users on 8/14. 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.
Mon 10/2712:10 pmCNX - USM
1 stop6h 45mBangkok Airways
Mon 11/38:50 amUSM - CNX
Nonstop1h 50mBangkok Airways
Deal found 8/14$330

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 14, 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 11/11

10:10 am-3:40 pm

1 stop5h 30m

Ko Samui

Sat 11/15

7:00 am-11:20 am

1 stop4h 20m

$231

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Wed 9/17

8:00 pm-8:15 am

1 stop12h 15m

Ko Samui

Tue 9/23

8:55 am-10:40 am

Nonstop1h 45m

$234

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Tue 9/23

2:00 pm-7:45 pm

1 stop5h 45m

Ko Samui

Tue 9/30

7:00 am-11:20 am

1 stop4h 20m

$252

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Thu 9/11

10:10 am-5:05 pm

1 stop6h 55m

Ko Samui

Sun 9/14

8:55 am-10:40 am

Nonstop1h 45m

$257

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Wed 9/17

8:10 am-8:25 pm

2 stops12h 15m

Ko Samui

Tue 9/23

8:55 am-10:40 am

Nonstop1h 45m

$258

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Mon 9/8

10:10 am-2:45 pm

1 stop4h 35m

Ko Samui

Fri 9/12

8:55 am-10:40 am

Nonstop1h 45m

$258

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Mon 1/12

3:45 pm-8:30 pm

1 stop4h 45m

Ko Samui

Tue 2/3

7:00 am-11:55 am

1 stop4h 55m

$262

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Tue 1/13

10:10 am-3:40 pm

1 stop5h 30m

Ko Samui

Wed 2/4

7:00 am-11:20 am

1 stop4h 20m

$266

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Fri 8/29

11:55 am-4:15 pm

1 stop4h 20m

Ko Samui

Tue 9/2

8:55 am-10:40 am

Nonstop1h 45m

$266

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Wed 1/14

3:45 pm-8:30 pm

1 stop4h 45m

Ko Samui

Wed 2/4

7:00 am-11:55 am

1 stop4h 55m

$270

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Showing 1-10 of 20 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 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 August 8, 2025.

Booking 40 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 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 14, 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.

Weekly flight availability from Chiang Mai to Ko Samui

Explore weekly flight availability from Chiang Mai to Ko Samui. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 14, 2025.

The most flights from CNX to USM are scheduled on a Wednesday (8 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 on average).

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 14, 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
112 reviews

Boarding

8.0

Entertainment

6.3

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.2

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
112 reviews
Bangkok Airways
8.0
Very good
112 reviews

Boarding

8.0

Entertainment

6.3

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.2

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?

    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 7 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.

  • 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 50% 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 (97%), EVA Air (93%) or Qatar 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 $367, our data shows the cheapest flight currently is $84. 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.

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

See prices for flight routes from nearby airports that may be better suited for you.
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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 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Bangkok AirwaysCheapest$186Average$365FlexibilityNo cancel feeOn-time74%

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