$202 Cheap Flights from Chiang Mai (CNX) to Samui Intl. Airport (USM)

View $202 flight on Sun, Jun 1, 2025Opens in a new window

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Find available prices by choosing your travel dates.

Cheap Flights from Chiang Mai to Samui Intl. Airport (CNX-USM)

Prices were available within the past 7 days and start at $202 for one-way flights and $406 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Bangkok Airways
Thu, Oct 30 - Sun, Nov 2
CNX
Chiang Mai
USM
Koh Samui
$406 Roundtrip, found 6 days ago
$406
Roundtrip
found 6 days ago
Select Bangkok Airways flight, departing Thu, Oct 30 from Chiang Mai to Koh Samui, returning Sun, Nov 2, priced at $406 found 6 days ago
Bangkok Airways
Thu, Sep 4 - Thu, Sep 11
CNX
Chiang Mai
USM
Koh Samui
$408 Roundtrip, found 1 day ago
$408
Roundtrip
found 1 day ago
Select Bangkok Airways flight, departing Thu, Sep 4 from Chiang Mai to Koh Samui, returning Thu, Sep 11, priced at $408 found 1 day ago
Bangkok Airways
Thu, Nov 20 - Sun, Nov 23
CNX
Chiang Mai
USM
Koh Samui
$409 Roundtrip, found 2 days ago
$409
Roundtrip
found 2 days ago
Select Bangkok Airways flight, departing Thu, Nov 20 from Chiang Mai to Koh Samui, returning Sun, Nov 23, priced at $409 found 2 days ago
Bangkok Airways
Tue, Oct 21 - Tue, Oct 28
CNX
Chiang Mai
USM
Koh Samui
$410 Roundtrip, found 5 days ago
$410
Roundtrip
found 5 days ago
Select Bangkok Airways flight, departing Tue, Oct 21 from Chiang Mai to Koh Samui, returning Tue, Oct 28, priced at $410 found 5 days ago
Bangkok Airways
Sat, May 17 - Sun, May 18
CNX
Chiang Mai
USM
Koh Samui
$411 Roundtrip, just found
$411
Roundtrip
just found
Select Bangkok Airways flight, departing Sat, May 17 from Chiang Mai to Koh Samui, returning Sun, May 18, priced at $411 just found
Bangkok Airways
Thu, Oct 30 - Sun, Nov 2
CNX
Chiang Mai
USM
Koh Samui
$416 Roundtrip, found 6 days ago
$416
Roundtrip
found 6 days ago
Select Bangkok Airways flight, departing Thu, Oct 30 from Chiang Mai to Koh Samui, returning Sun, Nov 2, priced at $416 found 6 days ago
Bangkok Airways
Thu, Sep 4 - Thu, Sep 11
CNX
Chiang Mai
USM
Koh Samui
$419 Roundtrip, found 1 day ago
$419
Roundtrip
found 1 day ago
Select Bangkok Airways flight, departing Thu, Sep 4 from Chiang Mai to Koh Samui, returning Thu, Sep 11, priced at $419 found 1 day ago
Bangkok Airways
Thu, Oct 30 - Sun, Nov 2
CNX
Chiang Mai
USM
Koh Samui
$420 Roundtrip, found 6 days ago
$420
Roundtrip
found 6 days ago
Select Bangkok Airways flight, departing Thu, Oct 30 from Chiang Mai to Koh Samui, returning Sun, Nov 2, priced at $420 found 6 days ago
Bangkok Airways
Sat, May 17 - Sun, May 18
CNX
Chiang Mai
USM
Koh Samui
$421 Roundtrip, just found
$421
Roundtrip
just found
Select Bangkok Airways flight, departing Sat, May 17 from Chiang Mai to Koh Samui, returning Sun, May 18, priced at $421 just found
Bangkok Airways
Mon, Jun 9 - Fri, Jun 13
CNX
Chiang Mai
USM
Koh Samui
$423 Roundtrip, found 22 hours ago
$423
Roundtrip
found 22 hours ago
Select Bangkok Airways flight, departing Mon, Jun 9 from Chiang Mai to Koh Samui, returning Fri, Jun 13, priced at $423 found 22 hours ago

Frequently asked questions

How much does a flight from Chiang Mai Intl. Airport (CNX) to Ko Samui Airport (USM) cost?
Book cheap return fares starting at $409 from Chiang Mai Intl. Airport (CNX) to Ko Samui Airport (USM). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Bangkok Airways flight leaving CNX on May 17 2025 and touching down at USM. The price was last updated on April 23 2025 and has not changed since.
What is the cheapest month to fly from CNX to USM?
The cheapest flights from CNX to USM are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Chiang Mai Intl. Airport (CNX) to Ko Samui Airport (USM)?
When departing from Chiang Mai Intl. Airport (CNX), you can take a direct flight to Ko Samui Airport (USM) with Bangkok Airways.
What is the cheapest airline that flies from CNX to USM?
At the moment, the cheapest airline offering one-way flights from CNX to USM is Bangkok Airways. You can jet off on this route from $202. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from CNX on June 1 2025. Prices were last updated on April 23 2025 and have not changed since.
How many flights per day from Chiang Mai Intl. Airport (CNX) to Ko Samui Airport (USM)?
On average, there’s only 1 nonstop flight taking off from Chiang Mai Intl. Airport (CNX) to Ko Samui Airport (USM) each day. If this doesn’t fit your travel plans, consider flights with a layover. Simply filter your search results on Expedia to include one stop or more to discover a better alternative.
What are the most popular departure times for flights from Chiang Mai Intl. Airport (CNX) to Ko Samui Airport (USM)?
Flights between CNX and USM tend to be busiest at 11 AM. If you’re after a quieter experience and possibly cheaper fares, choose a time outside the usual busy windows.
What day of the week has the most flights from CNX to USM?
If you fly on a Friday, you’ll get the largest range of choices for flights from Chiang Mai Intl. Airport (CNX) to Ko Samui Airport (USM).
What is the earliest flight from Chiang Mai Intl. Airport (CNX) to Ko Samui Airport (USM)?
Catch the earliest flight at around 11:30AM UTC+7, heading out of Chiang Mai Intl. Airport (CNX). You’ll be flying for about 1h 45m, reaching Ko Samui Airport (USM) at approximately 1:15PM UTC+7.
How long does it take to fly from Chiang Mai Intl. Airport (CNX) to Ko Samui Airport (USM)?
The average flight duration from CNX to USM is 1 hour and 45 minutes, covering a distance of 640 mi.
What airline has the least delays from CNX to USM?
With 100% of journeys usually arriving on time, Bangkok Airways has the best on-time performance for nonstop flights from Chiang Mai Intl. Airport (CNX) to Ko Samui Airport (USM). To check your flight status and get notifications about any changes, use the Expedia App.
What is the best time to fly from Chiang Mai Intl. Airport (CNX) to Ko Samui Airport (USM)?
Book a flight from Chiang Mai Intl. Airport (CNX) to Ko Samui Airport (USM) that takes off before 3 PM to reduce the risk of cancellations. Later departures are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for Koh Samui from Chiang Mai Intl. Airport (CNX)?
Ko Samui Airport (USM) is the only airport in Koh Samui with direct flights from Chiang Mai Intl. Airport (CNX). Explore the available options and find affordable fares on Expedia.
Is it cheaper to buy a plane ticket from Chiang Mai Intl. Airport (CNX) to Ko Samui Airport (USM) last-minute?
Last-minute bookings from CNX to USM are generally more expensive. To lock in the cheapest rates, start searching for flights early. That being said, if you’re flexible with your travel plans, it’s possible to land a cheap fare right before your trip.
Is it cheaper to book a CNX to USM flight and hotel package?
Compared with arranging hotels and flights separately, booking a CNX to USM flight and hotel package with Expedia could result in significant savings. What’s more, having it all in one place takes the hassle out of planning your trip. Simply secure your flights and select from our wide range of stays, then personalize your trip with other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Chiang Mai Intl. Airport (CNX) to Ko Samui Airport (USM)?
If you reserved your CNX to USM flight in the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of fare you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for more details.
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