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

Frequently Asked Questions

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

  Based on Trip.com data, AirAsia Berhad (Malaysia) offers one-way fares as low as US$112 on Cheapest nonstop routes (e.g. CNX to ICN on Fri, Feb 6), while Thai AirAsia offers Cheapest nonstop round-trips from US$255 departing on Sat, Feb 7 and returning on Tue, Feb 10.

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

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

  It takes about 4 hours 59 minutes to fly from Chiang Mai to Seoul.

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

  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 Seoul 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 Chiang Mai to Seoul?

  Based on Trip.com data in the past 4 weeks, there is 18 flight per week flying from Chiang Mai to Seoul. You can check the weekly schedule for popular airlines on this route below: Korean Air: S/M/T/W/T/F/S -- KE5090 (22:58) Korean Air: S/M/T/W/T/F/S -- KE684 (00:29)

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

  To find best deals on flights from Chiang Mai to Seoul, 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 Fri, Feb 6, with one-way flights priced at just US$112.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Jeju 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 Seoul travel is around July.
  · Get exclusive promo codes for Trip.com app users.

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

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

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

  After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Chiang Mai to Seoul on December 17, 2025 with Thai AirAsia, with prices starting at US$117.

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

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

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

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

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

  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.