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Chiang Mai to Seoul CNX → GMP, ICN

Chiang Mai International Airport (CNX) → Gimpo International Airport (GMP), Incheon International Airport (ICN)

The cheapest return found recently is $336 with Air China, 16 Dec – 26 Dec, found yesterday. The cheapest one-way found recently is $339 with Eastar Jet, 13 Feb 2027, found 5 days ago.

Return

The cheapest return fare on each of 7 departure dates is usually $325 to $350.

Cheapest return found recently

$336

16 Dec – 26 Dec · Air China

Chiang Mai International Airport (CNX) → Gimpo International Airport (GMP)

Leaves 11:05 p.m. · Return leaves 9:55 p.m. · 37 h 55 min of travel, both ways together

out 1 stop, back 1 stop

found yesterday

See prices for these datesCheck today's price

Cheapest nonstop return

$271

22 Oct – 30 Oct · Air Busan

Chiang Mai International Airport (CNX) → Incheon International Airport (ICN)

Leaves 12:50 a.m. · Return leaves 7:15 p.m. · 11 h 45 min of travel, both ways together

out nonstop, back nonstop

found 3 days ago

See prices for these datesCheck today's price

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Found recently, and the cheapest we hold

Cheapest found recently $336 16 Dec – 26 Decfound yesterdaySee prices for these dates

Cheapest we hold, of any age $271 22 Oct – 30 Octfound 3 days agoSee prices for these dates

What have prices looked like?

Over 23 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $224 to $436.

$336, the cheapest return found recently, sits here in that range of $224 to $436.

23 days is a short history, so treat this range as an early guide.

Those were the prices on those days, not today's.

Is this a good return price?

Compared with the cheapest return fare on each of 7 departure dates from 22 Oct to 22 Jan 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.

Could nearby dates be cheaper?

We hold no other 10-night return fares leaving within 3 days of 16 Dec to compare.

Every date we hold

10 fares on 7 departure dates

22 Oct – 30 Oct: $271, found 3 days ago5 Nov – 9 Nov: $332, found 3 days ago6 Nov – 16 Nov: $320, found 6 days ago20 Nov – 24 Nov: $330, found 4 days ago22 Nov – 24 Nov: $364, found 4 days ago16 Dec – 26 Dec: $336, found yesterday22 Jan 2027 – 25 Jan 2027: $401, found 5 days agoOctNovDecJan
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
22 Oct – 30 Oct$271Air BusanChiang Mai International Airport (CNX) → Incheon International Airport (ICN)out nonstop, back nonstopfound 3 days agoSee prices for these dates
5 Nov – 9 Nov$332Air BusanChiang Mai International Airport (CNX) → Incheon International Airport (ICN)out nonstop, back nonstopfound 3 days agoSee prices for these dates
6 Nov – 16 Nov$320Eastar JetChiang Mai International Airport (CNX) → Incheon International Airport (ICN)out nonstop, back nonstopfound 6 days agoSee prices for these dates
20 Nov – 24 Nov$330Air BusanChiang Mai International Airport (CNX) → Incheon International Airport (ICN)out nonstop, back 1 stopfound 4 days agoSee prices for these dates
22 Nov – 24 Nov$364China EasternChiang Mai International Airport (CNX) → Incheon International Airport (ICN)out 1 stop, back 1 stopfound 4 days agoSee prices for these dates
16 Dec – 26 Dec$336Air ChinaChiang Mai International Airport (CNX) → Gimpo International Airport (GMP)out 1 stop, back 1 stopfound yesterdaySee prices for these dates
22 Jan 2027 – 25 Jan 2027$401China EasternChiang Mai International Airport (CNX) → Incheon International Airport (ICN)out 1 stop, back nonstopfound 5 days agoSee prices for these dates

Which month looks cheapest?

October 2026 is the cheapest month — from $271.

October 2026From $271Cheapest seen1 departure date22 Oct – 30 Oct · found 3 days agoSee prices for these dates
November 2026From $3204 departure dates6 Nov – 16 Nov · found 6 days agoSee prices for these dates
December 2026From $3361 departure date16 Dec – 26 Dec · found yesterdaySee prices for these dates
January 2027From $4011 departure date22 Jan 2027 – 25 Jan 2027 · found 5 days agoSee prices for these dates

Airlines on the cheapest dates: Air Busan, China Eastern, Eastar Jet, Air China.

One-way

Not enough comparable prices yet for a usual one-way price.

Cheapest one-way found recently

$339

13 Feb 2027 · Eastar Jet

Chiang Mai International Airport (CNX) → Incheon International Airport (ICN)

Leaves 10:20 p.m. · 5 h 10 min trip

nonstop

found 5 days ago

Open this tripCheck today's price

Cheapest nonstop one-way

$339

13 Feb 2027 · Eastar Jet

Chiang Mai International Airport (CNX) → Incheon International Airport (ICN)

Leaves 10:20 p.m. · 5 h 10 min trip

nonstop

found 5 days ago

Open this tripCheck today's price

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Found recently, and the cheapest we hold

Cheapest found recently $339 13 Feb 2027found 5 days agoOpen this trip

It is also the cheapest one-way we hold, of any age.

What have prices looked like?

Over 8 days, 6 Oct to 18 Oct, the cheapest one-way we saw each day was $142 to $339.

At $339, the cheapest one-way found recently is at the high end of that range.

8 days is a short history, so treat this range as an early guide.

Those were the prices on those days, not today's.

Is this a good one-way price?

Not enough comparable prices yet: we hold one-way fares on 1 departure date and need at least 3 to say what is usual.

Could nearby dates be cheaper?

We hold no other one-way fares leaving within 3 days of 13 Feb 2027 to compare.

Every date we hold

1 fares on 1 departure dates

See every date as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
13 Feb 2027$339Eastar JetChiang Mai International Airport (CNX) → Incheon International Airport (ICN)nonstopfound 5 days agoOpen this trip

Airlines on the cheapest dates: Eastar Jet.

Premium cabin fares from Chiang Mai to Seoul

We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.

Today's prices for 16 Dec – 26 Dec in another cabin: Premium economy · Business · First

Today's prices for 13 Feb 2027 in another cabin: Premium economy · Business · First

How far ahead were prices cheapest for Chiang Mai to Seoul?

Return

The cheapest fares were 7 to 13 days before departure.

From the cheapest return each day between 24 Sept and 18 Oct (23 days), grouped by how many days ahead the flight left; one adult in economy.

Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.

Prices reflect recent searches — current fares may differ.

See these ranges as a table
Typical price in each booking range — round trip, per traveler in Economy.
Booked ahead byTypical fareCheapest dayAbove the cheapestDays of prices
0–6 days$271$224+4%8
7–13 days$261$261Cheapest seen7
14–29 days$320$261+23%7
30–59 days$398$330+53%18

One-way

Not enough history yet: in 8 days of one-way prices, 6 Oct to 18 Oct, fewer than 3 booking ranges had prices on 7 days or more.

Live price for these dates

The cheapest return found recently is for 16 Dec – 26 Dec. A live search on this page shows what those dates cost now, for one adult in economy.

Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work