Cheap Flights Chiang Rai – Koh Samui from CAD 153

Flight FAQs

• Which airlines offer the cheapest flights from Chiang Rai (CEI) to Koh Samui (USM)?

  Based on Trip.com data, Thai AirAsia offers one-way fares as low as CAD 153 on Cheapest nonstop routes (e.g. CEI to USM on Sun, Feb 22), while Thai AirAsia offers Cheapest nonstop round-trips from CAD 398 departing on Sat, Feb 7 and returning on Tue, Feb 10.

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

  At the moment, you can catch a direct flight from Chiang Rai 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.

• When is the best time to book flights from Chiang Rai 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 Rai 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 can I find the best deals on flights from Chiang Rai to Koh Samui?

  To find best deals on flights from Chiang Rai 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, Feb 22, with one-way flights priced at just CAD 153.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Thai AirAsia.
  · 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 is the best time to book a flight from Chiang Rai to Koh Samui to get the best price?

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

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

  After crunching the numbers on our January flight calendar, it's currently cheapest to fly from Chiang Rai to Koh Samui on January 21, 2026 with Thai Vietjet Air, with prices starting at CAD 147.

• Which airports can I fly through when travelling to Koh Samui from Chiang Rai?

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

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

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

• How can I change or cancel my flight ticket from Chiang Rai 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.