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$112+ Cheap flights from Chiang Mai (CNX) to Seoul (SEL)

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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
CNX — SEL
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Chiang Mai to Seoul

Discover tips and strategies to find the most affordable flight options for your journey from Chiang Mai (CNX) to Seoul (SEL). 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 September 16, 2025.

Round-trip from

$278
(Booking.com)

One-way from

$112
(ThaiVietJet)

Popular in

August

Cheapest in

September

Average price

$242

Good round-trip deal

$798 or less

Good one-way deal

$575 or less
From Chiang Mai to Seoul (SEL)
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One-way flight from Chiang Mai to Seoul (SEL)
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Highest demand for flights based on searches. 7% potential increase in price ($29 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Chiang Mai to Seoul (SEL).
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Price to beat on a one-way flight from Chiang Mai to Seoul (SEL).
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Find flight deals from Chiang Mai to Seoul

Cheapest flights from Chiang Mai to Seoul
Explore the most affordable flight options available from Chiang Mai to Seoul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Jin Air deal was found by Cheapflights users on 9/15. 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.
Thu 9/189:45 pmCNX - ICN
Nonstop5h 20mJin Air
Thu 10/95:10 pmICN - CNX
Nonstop5h 35mJin Air
Deal found 9/15$278
This Jeju Air deal was found by Cheapflights users on 9/14. 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 9/1810:35 pmCNX - ICN
Nonstop5h 15mJeju Air
Thu 10/96:00 pmICN - CNX
Nonstop5h 35mJeju Air
Deal found 9/14$284
This Trip.com deal was found by Cheapflights users on 9/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/308:30 pmCNX - ICN
1 stop11h 35mMultiple Airlines
Wed 11/52:20 amICN - CNX
1 stop18h 30mMultiple Airlines
Deal found 9/15$292
This Gotogate deal was found by Cheapflights users on 9/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/303:35 pmCNX - ICN
2 stops17h 40mChina Eastern
Thu 11/68:50 pmICN - CNX
2 stops20h 35mChina Eastern
Deal found 9/15$352
This Mytrip deal was found by Cheapflights users on 9/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/3011:05 pmCNX - GMP
1 stop12h 00mMultiple Airlines
Thu 11/68:35 amGMP - CNX
1 stop10h 20mMultiple Airlines
Deal found 9/15$554
This Japan Airlines deal was found by Cheapflights users on 9/15. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/32:35 pmCNX - GMP
2 stops18h 10mJapan Airlines
Sat 10/117:20 pmGMP - CNX
2 stops17h 55mJapan Airlines
Deal found 9/15$2,050
This Japan Airlines deal was found by Cheapflights users on 9/14. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1712:10 pmCNX - GMP
2 stops20h 45mJapan Airlines
Sat 12/207:40 pmGMP - CNX
2 stops17h 40mJapan Airlines
Deal found 9/14$2,522
This Priceline deal was found by Cheapflights users on 9/15. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/3012:10 pmCNX - GMP
2 stops20h 45mJapan Airlines
Thu 11/67:40 pmGMP - CNX
2 stops17h 40mJapan Airlines
Deal found 9/15$2,523
This Japan Airlines deal was found by Cheapflights users on 9/15. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/317:45 pmCNX - GMP
2 stops24h 20mJapan Airlines
Fri 11/77:40 pmGMP - CNX
2 stops17h 40mJapan Airlines
Deal found 9/15$2,534

Cheapflights Fare Finder

 
Customize your flight search to find flights from Chiang Mai to Seoul 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 September 16, 2025.
Use the filters below to find and compare flights from Chiang Mai to Seoul that are best for you.

Fly from

Chiang Mai

Fly to

Seoul

Route

Depart

Return

Price

Chiang MaiIncheon

CNX - ICN

CNXICN

Chiang Mai

Fri 10/31

12:25 pm-8:55 pm

1 stop30h 30m

Incheon Intl

Thu 11/6

12:10 am-11:25 am

1 stop13h 15m

$526

Chiang MaiSeoul

CNX - GMP

CNXGMP

Chiang Mai

Thu 10/30

11:05 pm-1:05 pm

1 stop12h 00m

Seoul Gimpo Intl

Thu 11/6

8:35 am-4:55 pm

1 stop10h 20m

$554

Chiang MaiIncheon

CNX - ICN

CNXICN

Chiang Mai

Wed 11/26

7:45 pm-6:45 pm

2 stops21h 00m

Incheon Intl

Mon 12/1

11:40 am-11:20 am

2 stops25h 40m

$609

Chiang MaiIncheon

CNX - ICN

CNXICN

Chiang Mai

Thu 11/27

7:45 pm-6:45 pm

2 stops21h 00m

Incheon Intl

Tue 12/2

11:40 am-11:20 am

2 stops25h 40m

$609

Chiang MaiIncheon

CNX - ICN

CNXICN

Chiang Mai

Wed 11/26

7:45 pm-6:45 pm

2 stops21h 00m

Incheon Intl

Wed 12/3

11:40 am-8:45 am

2 stops23h 05m

$609

Chiang MaiIncheon

CNX - ICN

CNXICN

Chiang Mai

Sun 11/30

10:10 am-6:45 pm

2 stops30h 35m

Incheon Intl

Wed 12/3

11:40 am-9:20 am

2 stops23h 40m

$614

Chiang MaiIncheon

CNX - ICN

CNXICN

Chiang Mai

Sun 12/7

11:25 am-11:20 am

1 stop21h 55m

Incheon Intl

Tue 12/9

12:30 pm-9:25 am

2 stops22h 55m

$639

Chiang MaiIncheon

CNX - ICN

CNXICN

Chiang Mai

Sat 12/6

11:25 am-11:20 am

1 stop21h 55m

Incheon Intl

Sat 12/13

12:30 pm-9:25 am

2 stops22h 55m

$639

Chiang MaiIncheon

CNX - ICN

CNXICN

Chiang Mai

Sun 12/7

11:25 am-11:20 am

1 stop21h 55m

Incheon Intl

Sat 12/13

12:30 pm-9:25 am

2 stops22h 55m

$639

Chiang MaiIncheon

CNX - ICN

CNXICN

Chiang Mai

Mon 12/8

9:40 pm-5:05 am

Nonstop5h 25m

Incheon Intl

Wed 12/10

4:05 pm-8:30 pm

Nonstop6h 25m

$673

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 35 results
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Best time to book a flight from Chiang Mai to Seoul

Have a flexible travel schedule? Discover the best time to fly to Seoul from Chiang Mai 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 Chiang Mai to Seoul

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

Currently, February is the cheapest month in which you can book a flight from Chiang Mai to Seoul (average of $990). Flying from Chiang Mai to Seoul in December is currently the most expensive (average of $1,633). 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 CNX to SEL?

Find hourly flight availability from Chiang Mai to Seoul. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

One of the essential ways to save on airfare from Chiang Mai to Seoul is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 14% on airfare.

Weekly flight availability from Chiang Mai to Seoul

Explore weekly flight availability from Chiang Mai to Seoul. 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 September 16, 2025.

The most flights from CNX to SEL are scheduled on a Wednesday (8 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 on average).

Related info for your journey

Find useful and relevant information for your journey from Chiang Mai to Seoul. 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 from for flights from Chiang Mai to Seoul?

    For a flight from Chiang Mai to Seoul, you will be flying from Chiang Mai. Chiang Mai (CNX) is just 1.9 mi from the center of the city. Chiang Mai is the only Chiang Mai airport and it handles 7 outbound flights to Seoul per day. 0 airlines have flights to Seoul from Chiang Mai on a regular basis.

  • How popular is this Chiang Mai to Seoul flight route?

    The Chiang Mai to Seoul flight path was viewed by 8 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    There are many flights that can get you from Chiang Mai to Seoul in 21h. Fly via Malaysia Airlines or EVA Air to get the fastest option. Chiang Mai and Seoul are separated by a distance of 2099 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    The cheapest airline one-way is Jin Air, with whom users have recently found tickets for as low as $150. However, be on the lookout for offers from Jeju Air and China Eastern, as they are both options that can get you from Chiang Mai to Seoul for a low price.

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

    Consider Delta (81%), Jeju Air (76%) or Korean Air (74%) when booking your flight. These represent the most reliable airlines when flying from Chiang Mai to Seoul.

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

    Looking at all options, your cheapest flight can be booked for $226. While the most popular route (Chiang Mai - Seoul Gimpo Intl) can be booked for $373 on average, our data indicates $949 when flying from Chiang Mai to Seoul.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Chiang Mai to Seoul 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 Chiang Mai to Seoul?

    Currently, February is the cheapest month in which you can book a flight from Chiang Mai to Seoul (average of $990). Flying from Chiang Mai to Seoul in December is currently the most expensive (average of $1,633). 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.

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