Cheap Flights from Chiang Mai (CNX) to Koh Samui (USM)

Frequently Asked Questions

• What are the cheapest flights from Chiang Mai to Koh Samui (CNX-USM)?

  Based on Trip.com data, Bangkok Airways offers one-way fares as low as US$85 on Cheapest nonstop routes (e.g. CNX to USM on Sun, Jun 21), while Bangkok Airways offers Cheapest nonstop round-trips from US$212 departing on Wed, Jun 10 and returning on Sat, Jun 13.

• Which airlines offer direct flights from Chiang Mai to Koh Samui?

  At the moment, you can catch a nonstop flight from Chiang Mai to Koh Samui with the following airlines, including: Bangkok Airways Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• How long is a flight from Chiang Mai to Koh Samui?

  It takes about 1 hour 45 minutes to fly from Chiang Mai to Koh Samui.

• When is the best time to book flights from Chiang Mai to Koh Samui?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Chiang Mai to Koh Samui is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How many flights are there per week from Chiang Mai to Koh Samui?

  Based on Trip.com data in the past 4 weeks, there is 7 flight per week flying from Chiang Mai to Koh Samui. You can check the weekly schedule for popular airlines on this route below: Bangkok Airways: S/M/T/W/T/F/S -- PG242 (11:35)

• How can I find the best deals on flights from Chiang Mai to Koh Samui?

  To find best deals on flights from Chiang Mai to Koh Samui, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Sun, Jun 21, with one-way flights priced at just US$85.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Bangkok Airways.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for Koh Samui travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Chiang Mai (CNX) to Koh Samui (USM) the cheapest?

  The cheapest months to fly from Chiang Mai to Koh Samui is September, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Chiang Mai to Koh Samui on?

  After crunching the numbers on our May flight calendar, it's currently cheapest to fly from Chiang Mai to Koh Samui on May 12, 2026 with Bangkok Airways, with prices starting at US$80.

• Which airports can I fly to for Koh Samui from Chiang Mai?

  You can land at any one of the following hubs in Koh Samui, with Chiang Mai International Airport to Samui Airport (CNX-USM) is by far the most common option on this route: Samui Airport (USM).

• Is there any time difference between Chiang Mai and Koh Samui?

  The time difference between Koh Samui and Chiang Mai is 0h.

• How do I change or cancel my ticket from Chiang Mai to Koh Samui?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.