Cheap Flights from Chiang Mai to Seoul from US$111

Frequently Asked Questions

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

  Based on Trip.com data, Jeju Air offers one-way fares as low as US$111 on Cheapest nonstop routes (e.g. CNX to ICN on Fri, Oct 2), while Jeju Air offers Cheapest nonstop round-trips from US$208 departing on Sat, Oct 3 and returning on Mon, Oct 5.

• 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 Air Busan 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 Chiang Mai to Seoul?

  It takes about 5 hours 23 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 12 flight per week flying from Chiang Mai to Seoul. You can check the weekly schedule for popular airlines on this route below: Jin Air: S/M/T/W/T/F/S -- LJ010 (21:47) Korean Air: S/M/T/W/T/F/S -- KE5090 (21:47)

• 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, Oct 2, with one-way flights priced at just US$111.
  · 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 September flight calendar, it's currently cheapest to fly from Chiang Mai to Seoul on September 30, 2026 with Jeju Air, with prices starting at US$113.

• Which airports fly into Seoul from Chiang Mai?

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

• 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.

• What is the average cost of a one-way flight from Chiang Mai to Seoul?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Chiang Mai to Seoul is US$355. Fares vary by travel date, airline and availability.

• What is the average cost of a round-trip flight from Chiang Mai to Seoul?

  Based on Trip.com data for travel in the next 30 days, the average round-trip fare from Chiang Mai to Seoul is US$468. The final price depends on the outbound and return dates, airline and fare conditions.

• How do I book flights from Chiang Mai to Seoul on Trip.com?

  Enter Chiang Mai and Seoul, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.

• Are there budget airlines on the Chiang Mai to Seoul route?

  Air Busan, Eastar Jet and Jeju Airare the most popular budget airlines flying from Chiang Mai to Seoul. Check baggage, seat and payment fees before comparing the final price.