Find Cheapest Airlines Flying from Chiang Mai to Koh Samui

Choose from 4 airlines flying from Chiang Mai to Koh Samui, including Bangkok Airways, Thai AirAsia and Nokair Airline. Bangkok Airways currently offers the cheapest ticket on this route.
Airlines are determined based on actual purchased flight tickets from Chiang Mai to Koh Samui according to previous 12 months data from Trip.com.

Find the cheapest direct flight options from Chiang Mai to Koh Samui over the next three months. Book one-way tickets from CAD 423 and round-trip tickets from CAD 516.

Displayed flight fares from Chiang Mai to Koh Samui are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Flight Information for Chiang Mai to Koh Samui Flights

The distance between Chiang Mai and Koh Samui is 1,032.16km. It takes around 1 hour 45 minutes on average to fly from Chiang Mai to Koh Samui. Based on Trip.com's data, travel demand peaks in July. The off-season for travel is September.

Cheapest one-way flight priceCAD 152
Cheapest return ticket priceCAD 315
Off-season travel monthSeptember
Peak season for travelJuly
Flight distance1,032.16km
Average flight time1 hour 45 minutes
Popular airlineBangkok Airways
Flight statistics for the Chiang Mai–Koh Samui route are based on aggregated booking data from Trip.com over the past 12 months.

Trip.com price insights on flights from Chiang Mai to Koh Samui

What is the cheapest month for one-way flights from Chiang Mai to Koh Samui?

The average one way ticket price paid by Trip.com users from Chiang Mai to Koh Samui in each month over the past 12 months.

Based on Trip.com data, the cheapest month to fly from Chiang Mai to Koh Samui is Jun, with an average price of CAD 294. The most expensive month is usually Dec, with average prices reaching CAD 434.

CAD 434
CAD 364
CAD 294
CAD 224
    Cheapest
  • CAD 360
    Jan
  • CAD 347
    Feb
  • CAD 321
    Mar
  • CAD 330
    Apr
  • CAD 295
    May
  • CAD 294
    Jun
  • CAD 377
    Jul
  • CAD 403
    Aug
  • CAD 313
    Sep
  • CAD 339
    Oct
  • CAD 353
    Nov
  • CAD 434
    Dec

Which day of the week is cheapest to fly from Chiang Mai to Koh Samui?

Data is based on the past 12 months and shows the average weekly airfare from Chiang Mai to Koh Samui on different days of the week according to Trip.com.

Based on Trip.com data from the past 12 months, the cheapest day to fly from Chiang Mai to Koh Samui is Thu. The average fare on this day is usually lower than on other days. Try to avoid flying on Tue as fares are usually the highest.

CAD 378
CAD 346
CAD 314
CAD 282
    Cheapest
  • CAD 351
    Mon
  • CAD 378
    Tue
  • CAD 316
    Wed
  • CAD 314
    Thu
  • CAD 356
    Fri
  • CAD 358
    Sat
  • CAD 358
    Sun

Flight FAQs

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

    Based on Trip.com data, Thai Lion Air offers one-way fares as low as CAD 152 on Cheapest nonstop routes (e.g. CNX to USM on Tue, Mar 17), while Bangkok Airways offers Cheapest nonstop round-trips from CAD 315 departing on Fri, Mar 13 and returning on Tue, Mar 17.
  • 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 Lion Air Nokair Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes about 1 hour 45 minutes to fly from Chiang Mai (CNX) to Koh Samui (USM).
  • 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.
  • 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 (11:45)
  • 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 Tue, Mar 17, with one-way flights priced at just CAD 152.
    · 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.
  • The cheapest months to fly from Chiang Mai to Koh Samui is September, when demand for travel is lower.
  • After crunching the numbers on our January flight calendar, it's currently cheapest to fly from Chiang Mai to Koh Samui on January 17, 2026 with Bangkok Airways, with prices starting at CAD 134.
  • 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).
  • The time difference between Koh Samui and Chiang Mai is 0h.
  • 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.