Cheap Flights from Seoul (SEL) to Chiang Mai (CNX)

Frequently Asked Questions

• What are the cheapest flights from Seoul to Chiang Mai (SEL-CNX)?

  Based on Trip.com data, T'Way Air offers one-way fares as low as US$58 on Cheapest nonstop routes (e.g. ICN to CNX on Mon, Mar 9), while Jeju Air offers Cheapest nonstop round-trips from US$190 departing on Fri, Mar 27 and returning on Sun, Mar 29.

• Which airlines offer direct flights from Seoul to Chiang Mai?

  At the moment, you can catch a nonstop flight from Seoul to Chiang Mai with the following airlines, including: Eastar Jet T'Way Air Jeju Air Jin Air Korean 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 Seoul to Chiang Mai?

  It takes about 6 hours 6 minutes to fly from Seoul to Chiang Mai.

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

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Seoul to Chiang Mai 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 Seoul to Chiang Mai?

  Based on Trip.com data in the past 4 weeks, there is 21 flight per week flying from Seoul to Chiang Mai. You can check the weekly schedule for popular airlines on this route below: Korean Air: S/M/T/W/T/F/S -- KE683 (19:11)

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

  To find best deals on flights from Seoul to Chiang Mai, 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 Mon, Mar 9, with one-way flights priced at just US$58.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is T'Way Air.
  · 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 Chiang Mai travel is around January.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Seoul (SEL) to Chiang Mai (CNX) the cheapest?

  The cheapest months to fly from Seoul to Chiang Mai is October, when demand for travel is lower.

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

  After crunching the numbers on our February flight calendar, it's currently cheapest to fly from Seoul to Chiang Mai on February 20, 2026 with Jeju Air, with prices starting at US$172.

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

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

• Is there any time difference between Seoul and Chiang Mai?

  The time difference between Chiang Mai and Seoul is 2h.

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

  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.