HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Chiang Mai

$81+ Cheap flights from Seoul (SEL) to Chiang Mai (CNX)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/23. Fares are subject to change and may not be available on all flights or dates of travel.
SEL — CNX
Aug 31 — Sep 71
Mon 8/31
Mon 9/7
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seoul to Chiang Mai with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Seoul to Chiang Mai are usually found in March or September, booked 36 days in advance, depart on a Friday or Sunday and return on a Friday

Cheap flight deals from Seoul to Chiang Mai

Cheapest flights from Seoul to Chiang Mai
Explore the most affordable flight options available from Seoul to Chiang Mai. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 1, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:10 pm
ICN
-
CNX
Nonstop5h 50m
Multiple Airlines
Sun 9/612:50 am
CNX
-
ICN
Nonstop5h 25m
Multiple Airlines
Deal found 7/28$245
This Jeju Air deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Jeju Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:10 pm
ICN
-
CNX
Nonstop5h 50m
Jeju Air
Sun 9/611:00 pm
CNX
-
ICN
Nonstop5h 30m
Jeju Air
Deal found 7/27$246
This Jeju Air deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Jeju Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/66:10 pm
ICN
-
CNX
Nonstop5h 50m
Jeju Air
Thu 9/1011:00 pm
CNX
-
ICN
Nonstop5h 30m
Jeju Air
Deal found 7/29$247
This Jeju Air deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Jeju Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/176:10 pm
ICN
-
CNX
Nonstop5h 50m
Jeju Air
Thu 9/2411:00 pm
CNX
-
ICN
Nonstop5h 30m
Jeju Air
Deal found 7/29$248
This Jeju Air deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Jeju Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/96:10 pm
ICN
-
CNX
Nonstop5h 50m
Jeju Air
Wed 9/3011:00 pm
CNX
-
ICN
Nonstop5h 30m
Jeju Air
Deal found 7/31$250
This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/107:55 pm
ICN
-
CNX
Nonstop5h 55m
Multiple Airlines
Tue 9/159:45 pm
CNX
-
ICN
Nonstop5h 20m
Multiple Airlines
Deal found 7/27$251
This Jin Air deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Jin Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/135:20 pm
ICN
-
CNX
Nonstop5h 25m
Jin Air
Tue 9/159:45 pm
CNX
-
ICN
Nonstop5h 20m
Jin Air
Deal found 7/31$253
This Booking.com deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/115:20 pm
ICN
-
CNX
Nonstop5h 25m
Multiple Airlines
Wed 9/1611:55 pm
CNX
-
ICN
Nonstop5h 15m
Multiple Airlines
Deal found 7/28$256
This Booking.com deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/315:20 pm
ICN
-
CNX
Nonstop5h 25m
Multiple Airlines
Sat 9/511:55 pm
CNX
-
ICN
Nonstop5h 15m
Multiple Airlines
Deal found 7/29$257
This Jeju Air deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Jeju Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/236:10 pm
ICN
-
CNX
Nonstop5h 50m
Jeju Air
Thu 8/2711:00 pm
CNX
-
ICN
Nonstop5h 30m
Jeju Air
Deal found 7/28$260
This CheapOair deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/196:30 pm
ICN
-
CNX
Nonstop6h 10m
Multiple Airlines
Sat 10/312:50 am
CNX
-
ICN
Nonstop5h 25m
Multiple Airlines
Deal found 7/29$264
This Justfly.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:50 pm
GMP
-
CNX
1 stop18h 35m
China Eastern
Sun 8/232:55 pm
CNX
-
GMP
1 stop18h 05m
China Eastern
Deal found 7/27$345

Find flight deals from Seoul to Chiang Mai

Discover tips and strategies to find the most affordable flight options for your journey from Seoul (SEL) to Chiang Mai (CNX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$245
(Kiwi.com)

One-way from

$81
(Kiwi.com)

Popular in

November

Cheapest in

March

Average price

$267

Good round-trip deal

$274 or less

Good one-way deal

$147 or less
Provider with most accurate pricing for Seoul (SEL)-Chiang Mai flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seoul (SEL)-Chiang Mai flights.
Search Deals
From Seoul (SEL) to Chiang Mai
Search Deals
One-way flight from Seoul (SEL) to Chiang Mai
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($50 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from Seoul (SEL) to Chiang Mai.
Search Deals
Price to beat on a one-way flight from Seoul (SEL) to Chiang Mai.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seoul to Chiang Mai that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 1, 2026.
Use the filters below to find and compare flights from Seoul to Chiang Mai that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IncheonChiang Mai

ICN - CNX

ICNCNX

Incheon Intl

Sat 9/5

6:10 pm-10:00 pm

Nonstop5h 50m

Chiang Mai

Sat 9/12

11:00 pm-6:30 am

Nonstop5h 30m

$245

IncheonChiang Mai

ICN - CNX

ICNCNX

Incheon Intl

Sun 9/6

6:10 pm-10:00 pm

Nonstop5h 50m

Chiang Mai

Thu 9/10

11:00 pm-6:30 am

Nonstop5h 30m

$247

IncheonChiang Mai

ICN - CNX

ICNCNX

Incheon Intl

Wed 9/9

6:10 pm-10:00 pm

Nonstop5h 50m

Chiang Mai

Wed 9/30

11:00 pm-6:30 am

Nonstop5h 30m

$250
Quickest round-trip

IncheonChiang Mai

ICN - CNX

ICNCNX

Incheon Intl

Sat 9/19

5:20 pm-8:45 pm

Nonstop5h 25m

Chiang Mai

Sun 10/4

9:45 pm-5:05 am

Nonstop5h 20m

$315

IncheonChiang Mai

ICN - CNX

ICNCNX

Incheon Intl

Sat 10/31

4:45 pm-8:40 pm

Nonstop5h 55m

Chiang Mai

Thu 11/5

9:40 pm-4:45 am

Nonstop5h 05m

$323

IncheonChiang Mai

ICN - CNX

ICNCNX

Incheon Intl

Fri 9/4

5:20 pm-8:45 pm

Nonstop5h 25m

Chiang Mai

Mon 9/7

9:45 pm-5:05 am

Nonstop5h 20m

$326

IncheonChiang Mai

ICN - CNX

ICNCNX

Incheon Intl

Mon 9/21

5:20 pm-8:45 pm

Nonstop5h 25m

Chiang Mai

Sun 9/27

9:45 pm-5:05 am

Nonstop5h 20m

$354

SeoulChiang Mai

GMP - CNX

GMPCNX

Seoul Gimpo Intl

Tue 8/18

8:50 pm-11:20 pm

1 stop28h 30m

Chiang Mai

Mon 9/7

2:55 pm-7:50 pm

1 stop26h 55m

$359

IncheonChiang Mai

ICN - CNX

ICNCNX

Incheon Intl

Fri 9/4

12:00 pm-8:10 am

2 stops22h 10m

Chiang Mai

Mon 9/7

4:10 pm-3:35 pm

3 stops21h 25m

$365

IncheonChiang Mai

ICN - CNX

ICNCNX

Incheon Intl

Sat 9/5

6:50 am-9:15 am

3 stops28h 25m

Chiang Mai

Wed 9/16

4:10 pm-3:35 pm

3 stops21h 25m

$368

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 35 resultsSorted by cheapest first
1
2
3
4
  • Most accurate provider: When it comes to deals on Seoul-Chiang Mai flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seoul-Chiang Mai flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seoul-Chiang Mai flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seoul-Chiang Mai flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seoul-Chiang Mai flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seoul to Chiang Mai

Have a flexible travel schedule? Discover the best time to fly to Chiang Mai from Seoul with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seoul to Chiang Mai

What is the cheapest month to book a flight from Seoul to Chiang Mai?

Currently, September is the cheapest month in which you can book a flight from Seoul to Chiang Mai (average of $241). Flying from Seoul to Chiang Mai in November is currently the most expensive (average of $388). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEL to CNX?

Find hourly flight availability from Seoul to Chiang Mai. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 1, 2026.

When flying from Seoul to Chiang Mai, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Seoul to Chiang Mai

Explore weekly flight availability from Seoul to Chiang Mai. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 1, 2026.

The most flights from SEL to CNX are scheduled on a Monday (3 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

How much does it cost to fly round-trip from Seoul to Chiang Mai?

Airfare is typical for this route at the moment.
Seoul to Chiang Mai flights typically cost between $235 and $312 in August.
The cheapest round-trip price found within the last 5 days was $245 on Multiple Airlines (Aug 18-Sep 6).

How far ahead should I book a flight from Seoul to Chiang Mai?

Booking 25 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seoul to Chiang Mai. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing Chiang Mai

Get insights into the airlines that provide service to Chiang Mai. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Chiang Mai. Reviews last updated August 1, 2026.
Read through reviews of airlines operating flights from Seoul to Chiang Mai, such as Jin Air,Korean Air, andJeju Air. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Jin Air
8.6
Very good
23 reviews

Overall

8.6

Boarding

8.9

Entertainment

7.6

Comfort

8.0

Crew

9.2

Food

7.8
Jin Air
8.6
Very good
23 reviews
Jin Air
8.6
Very good
23 reviews

Overall

8.6

Boarding

8.9

Entertainment

7.6

Comfort

8.0

Crew

9.2

Food

7.8
Korean Air
8.4
Very good
1,223 reviews
Jin Air
8.6
Very good
23 reviews

Overall

8.6

Boarding

8.9

Entertainment

7.6

Comfort

8.0

Crew

9.2

Food

7.8
Jeju Air
7.6
Good
38 reviews
Jin Air
8.6
Very good
23 reviews

Overall

8.6

Boarding

8.9

Entertainment

7.6

Comfort

8.0

Crew

9.2

Food

7.8

Related info for your journey

Find useful and relevant information for your journey from Seoul to Chiang Mai. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Chiang Mai from Seoul?

    Chiang Mai (CNX), located 1.9 mi from the city center, is the airport you fly into when you book flights from Seoul to Chiang Mai. 4 airlines have flights to Chiang Mai from Seoul on a regular basis. Booking flights from Seoul to Chiang Mai should not be difficult; the airport handles an average of 3 inbound flights from Seoul per day.

  • How long is the flight from Seoul to Chiang Mai?

    Jeju Air, Jin Air, and China Eastern can get you from Seoul to Chiang Mai in just under 5h 25m. Your travel time can differ by up to 23h 05m. There are 2099 mi between Seoul and Chiang Mai. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Seoul to Chiang Mai round-trip?

    Currently priced at $105, Jeju Air will fly you from Seoul to Chiang Mai and back. In addition to Jeju Air, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Jin Air and Eastar Jet - these airlines can fly you to your destination from $228 and $252, respectively. You may be able to fly from Seoul to Chiang Mai for 65% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Seoul to Chiang Mai one-way?

    For one-way options, check prices for Jeju Air. According to our data, you can fly for as low as $71. Users have also found prices from $85 and $96 on Jin Air and Eastar Jet, respectively.

  • What are the most reliable airlines from Seoul to Chiang Mai?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Seoul to Chiang Mai on time: Air Busan (100%), Eastar Jet (100%), Jeju Air (100%).

  • What are the cheapest flights from Seoul to Chiang Mai?

    While on average a flight from Seoul to Chiang Mai is generally $855, our data shows the cheapest flight currently is $106. When looking at the most popular route, (Seoul Gimpo Intl - Chiang Mai), you can expect to pay $369 for that flight.

  • Can I find deals for flights from Seoul to Chiang Mai that include hotel bookings?

    Yes. In addition to deals on Seoul to Chiang Mai flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seoul to Chiang Mai?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seoul to Chiang Mai.

  • Can I find deals for business class flights from Seoul to Chiang Mai?

    Yes. Cheapflights offers flight deals from Seoul to Chiang Mai by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seoul to Chiang Mai?

    Currently, September is the cheapest month in which you can book a flight from Seoul to Chiang Mai (average of $241). Flying from Seoul to Chiang Mai in November is currently the most expensive (average of $388). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seoul to Chiang Mai

See prices for flight routes from nearby airports that may be better suited for you.
Incheon Intl to Suvarnabhumi flights
Incheon Intl to Chiang Mai flights
Busan to Suvarnabhumi flights
Incheon Intl to Phuket City flights

Top 4 airlines flying from Seoul to Chiang Mai

Discover the top 4 airlines that operate flights from Seoul to Chiang Mai. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
Jeju AirCheapest$105Average$395FlexibilityNo cancel feeOn-timeN/A
Jin AirCheapest$228Average$426FlexibilityNo cancel feeOn-time78%
Eastar JetCheapest$252Average$407FlexibilityNo cancel feeOn-time86%
Korean AirCheapest$372Average$631FlexibilityNo cancel feeOn-time81%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights