Cheap Flights Chiang Mai to Koh Samui from £84

Flight FAQs

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

  Based on Trip.com data, Thai Vietjet Air offers Cheapest nonstop one-way flights from £84 (for example, CNX–USM on Thu, Oct 15). For a Cheapest nonstop return flight, Bangkok Airways offers fares from £166, departing on Thu, Oct 29 and returning on Wed, Nov 4.

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

  At the moment, you can catch a direct flight from Chiang Mai to Koh Samui with the following airlines, including: Bangkok Airways Thai AirAsia Thai Vietjet Air Thai Lion Air 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?

  A flight from Chiang Mai (CNX) to Koh Samui (USM) takes an average of 1 hour 45 minutes.

• 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 from Chiang Mai to Koh Samui each week?

  On average, 7 direct flights operate each week between Chiang Mai and Koh Samui. See below the schedules of the main airlines serving this route:
  Bangkok Airways: S/M/T/W/T/F/S – PG242 (departure at 11:29)

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

  Here are some tips for finding the best flight deals from Chiang Mai to Koh Samui on Trip.com:
  · Be flexible with your travel dates. The cheapest flight is currently on Thu, Oct 15, with one-way fares from just £84.
  · Compare airlines. Bangkok Airways currently offers the lowest fares on this route.
  · Set up a price alert to track fare changes without searching every day.
  · Check Trip.com regularly for flight deals and available promo codes.
  · Avoid peak season or book early. January is generally the busiest month for travel to Koh Samui.
  · Get exclusive promo codes on the Trip.com app.

• When is the best time to book a flight from Chiang Mai to Koh Samui to get the best price?

  The cheapest month to book a flight from Chiang Mai to Koh Samui is usually October, when demand is lower.

• Which upcoming date is the cheapest for flights from Chiang Mai to Koh Samui?

  After crunching the numbers on our October flight calendar, it's currently cheapest to fly from Chiang Mai to Koh Samui on October 20, 2026 with Bangkok Airways, with prices starting at £64.

• Which airports should you choose for flights from Chiang Mai to Koh Samui?

  Flights to Koh Samui can arrive at: Samui Airport (USM). The most common route connects Chiang Mai International Airport and Samui Airport (CNX–USM).

• What is the time difference between Chiang Mai and Koh Samui?

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

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

  Tickets can only be changed or cancelled 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.

• What is the average price of a one-way flight from Chiang Mai to Koh Samui?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Chiang Mai to Koh Samui is £131. Fares vary by travel date, airline and availability.

• What is the average price of a return flight from Chiang Mai to Koh Samui?

  Based on Trip.com data for flights departing in the next 30 days, the average return fare from Chiang Mai to Koh Samui is £219. Fares vary by travel date, airline and availability.

• How do I book flights from Chiang Mai to Koh Samui on Trip.com?

  Enter Chiang Mai and Koh Samui, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveller details and complete payment to receive your confirmation.

• Are there budget airlines on the Chiang Mai to Koh Samui route?

  Thai AirAsia, Thai Vietjet Air and Nokairare the most popular budget airlines flying from Chiang Mai to Koh Samui. Check baggage, seat and payment fees before comparing the final price.