£142 Cheap Flights from Seoul (ICN) to Chiang Mai (CNX)

View £142 flight on Mon, 7 Sept 2026Opens in a new window

Popular airlines from Incheon Intl. Airport (ICN) to Chiang Mai Intl. Airport (CNX)

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

Prices were available within the past 7 days and start at £142 for one-way flights and £258 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

China Eastern Airlines
Tue, 9 Jun - Mon, 15 Jun
ICN
Seoul
CNX
Chiang Mai
£258 Return, found 5 days ago
£258
Return
found 5 days ago
Select China Eastern Airlines flight, departing Tue, 9 Jun from Seoul to Chiang Mai, returning Mon, 15 Jun, priced at £258 found 5 days ago
China Eastern Airlines
Fri, 11 Sept - Mon, 14 Sept
ICN
Seoul
CNX
Chiang Mai
£264 Return, found 2 days ago
£264
Return
found 2 days ago
Select China Eastern Airlines flight, departing Fri, 11 Sept from Seoul to Chiang Mai, returning Mon, 14 Sept, priced at £264 found 2 days ago
China Eastern Airlines
Mon, 15 Jun - Thu, 18 Jun
ICN
Seoul
CNX
Chiang Mai
£265 Return, found 4 days ago
£265
Return
found 4 days ago
Select China Eastern Airlines flight, departing Mon, 15 Jun from Seoul to Chiang Mai, returning Thu, 18 Jun, priced at £265 found 4 days ago
China Eastern Airlines
Wed, 10 Jun - Tue, 16 Jun
ICN
Seoul
CNX
Chiang Mai
£269 Return, found 5 days ago
£269
Return
found 5 days ago
Select China Eastern Airlines flight, departing Wed, 10 Jun from Seoul to Chiang Mai, returning Tue, 16 Jun, priced at £269 found 5 days ago
China Eastern Airlines
Wed, 10 Jun - Tue, 16 Jun
ICN
Seoul
CNX
Chiang Mai
£272 Return, found 5 days ago
£272
Return
found 5 days ago
Select China Eastern Airlines flight, departing Wed, 10 Jun from Seoul to Chiang Mai, returning Tue, 16 Jun, priced at £272 found 5 days ago
China Eastern Airlines
Wed, 10 Jun - Tue, 16 Jun
ICN
Seoul
CNX
Chiang Mai
£277 Return, found 5 days ago
£277
Return
found 5 days ago
Select China Eastern Airlines flight, departing Wed, 10 Jun from Seoul to Chiang Mai, returning Tue, 16 Jun, priced at £277 found 5 days ago
China Southern Airlines
Wed, 1 Jul - Wed, 8 Jul
ICN
Seoul
CNX
Chiang Mai
£363 Return, found 1 day ago
£363
Return
found 1 day ago
Select China Southern Airlines flight, departing Wed, 1 Jul from Seoul to Chiang Mai, returning Wed, 8 Jul, priced at £363 found 1 day ago
Cathay Pacific
Wed, 13 May - Tue, 19 May
ICN
Seoul
CNX
Chiang Mai
£379 Return, found 2 days ago
£379
Return
found 2 days ago
Select Cathay Pacific flight, departing Wed, 13 May from Seoul to Chiang Mai, returning Tue, 19 May, priced at £379 found 2 days ago
Air China
Tue, 10 Nov - Tue, 17 Nov
ICN
Seoul
CNX
Chiang Mai
£397 Return, found 17 hours ago
£397
Return
found 17 hours ago
Select Air China flight, departing Tue, 10 Nov from Seoul to Chiang Mai, returning Tue, 17 Nov, priced at £397 found 17 hours ago
China Airlines
Sat, 30 May - Wed, 3 Jun
ICN
Seoul
CNX
Chiang Mai
£400 Return, found 6 days ago
£400
Return
found 6 days ago
Select China Airlines flight, departing Sat, 30 May from Seoul to Chiang Mai, returning Wed, 3 Jun, priced at £400 found 6 days ago

Find the cheapest month to fly from Seoul (ICN) to Chiang Mai (CNX)

March is typically the cheapest month to fly

From £131 - £300 per traveller.

Frequently asked questions

How much does a flight from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.) cost?
One-way flights typically cost between £167 and £1,838 and return flights often range between £655 and £3,352. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.
What is the cheapest month to fly from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.)?
March is typically the cheapest month to fly from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.), with average return fares of approximately £393. This is about 33% lower than the average price throughout the year. March often sees lower prices as it falls outside of peak holiday seasons, leading to reduced demand and more competitive airline pricing. Other cheap months to fly from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.) include February and April.
Which airlines fly direct from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.)?
Enter ICN to CNX and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.)?
To find a cheap flight from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.)?
The best airline to fly with from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.) will differ from traveller to traveller. If you like to fly early, LJ offers early morning flights. If price is the most important factor, U1 typically offers the lowest fares. MU offers the most daily flights from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.), which is brilliant if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.)?
When looking for the best time to fly from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.), you'll find that March and April are typically the cheapest months, with average return flights around £393. However, the most popular months for this route are October and September, which means you'll have plenty of flight options during those times. While there isn't a single month that is both the cheapest and most popular, you can choose based on whether saving money or having more flight flexibility is your priority. This information is based on booking data from the past year.
How many flights per day from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.)?
When flying from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.), you'll find approximately 2 nonstop flights per day. For even more choice, look at flights that include layovers, as there are around 59 connecting flights daily. Some common connection points include Hong Kong Intl. (HKG), Suvarnabhumi Intl. (BKK), and Taoyuan Intl. (TPE).
What is the earliest flight from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.)?
The earliest flight from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.) typically departs at approximately 12:10 AM local time, operated by MH. This service operates year-round, active in January, February, April, May, June, July, August, September, October, November, and December. An early departure like this can help maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.)?
You'll typically find the most flights from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.) on a Wednesday, with around 28 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include MU, CX, and TG. Flight options are notably more plentiful on Wednesdays compared to other days of the week.
What are the most popular departure times for flights from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.)?
The most popular departure times for flights from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.) are in the afternoon, between 3pm and 6pm. About 30% of passengers prefer this time. Many major carriers, including Thai Airways and China Eastern Airlines, offer flights during this window. This timing works well because it allows you to have a productive morning before heading to the airport, and you'll arrive in Chiang Mai in the evening, ready to check into your accommodation.
How long does it take to fly from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.)?
A nonstop flight from ICN to CNX typically takes around 6 hours 20 minutes, covering approximately 2,101 miles. Connecting flights on this route usually add 14 hours to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.)?
Select the "Business class" and "First class" filters when looking for ICN to CNX flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.) flight with Expedia?
It's easy to earn miles on a Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Chiang Mai from Incheon Intl. (ICN)?
From Incheon Intl. (ICN), you can fly directly into Chiang Mai Intl. (CNX) to reach Chiang Mai. Some flights may connect through major hubs like Hong Kong Intl. (HKG), Taoyuan Intl. (TPE), Pudong Intl. (PVG) before reaching Chiang Mai. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.) at the last minute?
Typically, booking a last minute flight from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.) flight and hotel package?
Securing a Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.)?
If you booked your Seoul (ICN-Incheon Intl.) to Chiang Mai (CNX-Chiang Mai Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Incheon Intl.
Destination airport
Chiang Mai Intl.
Airlines serving
Air China, Cathay Pacific, China Airlines, China Eastern Airlines, China Southern Airlines, EVA Airways, Hahn Air Systems, Korean Air, Malaysia Airlines, Scoot, Thai Airways International
Return price
£258
Distance
3360 km
Average flight time
3 hours 58 mins

Book with confidence

Compare flights from Seoul to Chiang Mai easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Seoul to Chiang Mai. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Chiang Mai Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Incheon Intl. to Chiang Mai Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Incheon Intl. (ICN) to Chiang Mai Intl. (CNX)

The easiest way to view the best deals on flights from Seoul to Chiang Mai today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Incheon Intl. to Chiang Mai Intl. start at just £258 and range up to £400.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Seoul and Chiang Mai
  • booking your flight during June, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Seoul to Chiang Mai flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Incheon Intl. to Chiang Mai Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Seoul to Chiang Mai easily and book with confidence

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*Available to Expedia members.