The cheapest times to fly from CNX to USM are

  • February 26th to April 1st
  • May 7th to July 1st
  • July 30th to September 23rd (except the weeks of August 6th and September 3rd)
  • October 22nd to December 2nd (except the week of November 5th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from CNX to USM is mid June. Prices can be as high as $510 for Sunday flights during late December, or as low as $220 for Tuesday flights around mid June.


When to Fly to Ko Samui

Flying from Chiang Mai (CNX) to Koh Samui (USM) will usually cost between $220 to $420 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid June with an average ticket price of $220. Due to high demand the most expensive time to fly is late December, with an average price of $486. Planning your trip to low-cost times can easily save you $266 on economy flights and even more on first-class flights. Generally, any price below $302 can be considered a good price for a round-trip CNX to USM flight.

See below for a graph of average weekly prices for the CNX to USM route. All prices are for round-trip tickets in USD.

CNX to USM Flight Prices

Compared to other flights, the CNX to USM flight is much cheaper than the average and costs much less than the average flight leaving from Chiang Mai. The average price per mile (for a direct flight) is $0.29, which is below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $13 (4%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $294. Return trip prices are from the USM to CNX flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from CNX to USM can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 2 hour 8 minutes may be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is a nonstop flight from CNX to USM while comparing.

Destination alternative #1: Surat Thani Airport (URT) in Surat Thani

  • 69 miles (111 km) away from USM
  • Usually 64.51% less expensive than USM
  • Nonstop flights available

See CNX to URT flights

Destination alternative #2: Krabi Airport (KBV) in Krabi

  • 124 miles (200 km) away from USM
  • Usually 59.20% less expensive than USM
  • Nonstop flights available

See CNX to KBV flights


Flight Questions Answered

Still have questions about flying from CNX to USM? We’ve got answers.

Which airlines fly this route?

You can find 21 major airlines flying this route most often: Air Astana, Air New Zealand, Bangkok Airways, Cathay Pacific, Emirates, EVA Air, Finnair, Garuda Indonesia, Hong Kong Airlines, Malaysia Airlines, Nok Air, Oman Air, Philippine Airlines, Qantas, Singapore Airlines, THAI, Thai AirAsia, Thai Vietjet Air, Turkish Airlines, Vietnam Airlines, Virgin Australia, and potentially more during busy seasons.

How far away is it from Samui Airport to Chiang Mai International Airport?

The distance between the two airports is roughly 641 miles or 1032 kilometers.

How long does it take to fly from CNX to USM?

The real-world flight time for a nonstop CNX to USM flight is about 2 hour 8 minutes.

How many flights go between Chiang Mai and Koh Samui?

It depends on the day of the week and the date, but a typical day might have around 89 available flights from CNX to USM.


Airport Location Info


Departing Airport

Origination code CNX
Origination airport name Chiang Mai International Airport
City Chiang Mai
Country Thailand
Latitude 18.8
Longitude 99

Return Airport

Destination code USM
Destination airport name Samui Airport
City Koh Samui
Country Thailand
Latitude 9.5
Longitude 100.1


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.