Cheap flights from Chiang Mai to Seoul from $168 CNX → GMP, ICN
Chiang Mai International Airport (CNX) → Gimpo International Airport (GMP), Incheon International Airport (ICN)
The cheapest return found recently is $412 with Air China, 18 Dec – 26 Dec, found 2 days ago. The cheapest one-way found recently is $168 with Air China, 1 Apr 2027, found 4 days ago.
- Cheapest one-way found recently
- $168, found 4 days ago
- Cheapest return found recently
- $412, 18 Dec to 26 Dec
- Usual return price
- $377 to $420
- Cheapest month to fly
- December 2026, return fares from $301 found in the last 7 days
- Airlines with nonstop flights
- Air Busan, Jeju Air, Korean Air, Jin Air, T'way Air, Eastar Jet
Return
The cheapest return fare on each of 7 departure dates is usually $377 to $420.
Cheapest return found recently
$412
18 Dec – 26 Dec · Air China
Chiang Mai International Airport (CNX) → Gimpo International Airport (GMP)
Leaves 11:05 p.m. · Return leaves 11:50 a.m. · 34 h 45 min of travel, both ways together
out 1 stop, back 2 stops
found 2 days ago
Cheapest nonstop return
$470
6 Feb 2027 – 7 Feb 2027 · Jin Air
Chiang Mai International Airport (CNX) → Incheon International Airport (ICN)
Leaves 10:20 p.m. · Return leaves 10:40 p.m. · 11 h 5 min of travel, both ways together
out nonstop, back nonstop
found 3 days ago
Found recently, and the cheapest we hold
$412 18 Dec – 26 Decfound 2 days agoSee prices for these dates
$301 7 Dec – 13 Decfound 3 days agoSee prices for these dates
What have prices looked like?
Over 47 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $224 to $436.
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 7 Dec to 10 Apr 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 8-night return fares leaving within 3 days of 18 Dec to compare.
Every date we hold
60 fares on 7 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 7 Dec – 13 Dec | $301 | Air China | Chiang Mai International Airport (CNX) → Incheon International Airport (ICN) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
| 18 Dec – 26 Dec | $376 | China Eastern | Chiang Mai International Airport (CNX) → Incheon International Airport (ICN) | out 1 stop, back 2 stops | found 6 days ago | See prices for these dates |
| 23 Jan 2027 – 24 Jan 2027 | $434 | Air China | Chiang Mai International Airport (CNX) → Incheon International Airport (ICN) | out 1 stop, back nonstop | found 3 days ago | See prices for these dates |
| 6 Feb 2027 – 7 Feb 2027 | $406 | Air China | Chiang Mai International Airport (CNX) → Incheon International Airport (ICN) | out 1 stop, back nonstop | found 3 days ago | See prices for these dates |
| 29 Mar 2027 – 11 Apr 2027 | $377 | Air China | Chiang Mai International Airport (CNX) → Gimpo International Airport (GMP) | out 1 stop, back 2 stops | found 4 days ago | See prices for these dates |
| 1 Apr 2027 – 15 Apr 2027 | $393 | Air China | Chiang Mai International Airport (CNX) → Gimpo International Airport (GMP) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 10 Apr 2027 – 14 Apr 2027 | $525 | China Southern Airlines | Chiang Mai International Airport (CNX) → Incheon International Airport (ICN) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
Which month looks cheapest?
December 2026 is the cheapest month — from $301.
Airlines on the cheapest dates: Air China, China Eastern, China Southern Airlines.
One-way
The cheapest one-way fare on each of 9 departure dates is usually $169 to $240.
Cheapest one-way found recently
$168
1 Apr 2027 · Air China
Chiang Mai International Airport (CNX) → Incheon International Airport (ICN)
Leaves 11:05 p.m. · 15 h 30 min trip
1 stop
found 4 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$168 1 Apr 2027found 4 days agoOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 14 days, 6 Oct to 11 Nov, the cheapest one-way we saw each day was $130 to $339.
14 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?
Compared with the cheapest one-way fare on each of 9 departure dates from 10 Feb 2027 to 3 Apr 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?
No. We hold one-way fares on 4 other departure dates within 3 days of 1 Apr 2027, and none is cheaper.
Every date we hold
9 fares on 9 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 10 Feb 2027 | $318 | Thai AirAsia | Chiang Mai International Airport (CNX) → Incheon International Airport (ICN) | 1 stop | found 7 days ago | Open this trip |
| 26 Mar 2027 | $169 | Air China | Chiang Mai International Airport (CNX) → Incheon International Airport (ICN) | 1 stop | found 4 days ago | Open this trip |
| 27 Mar 2027 | $169 | Air China | Chiang Mai International Airport (CNX) → Incheon International Airport (ICN) | 1 stop | found 4 days ago | Open this trip |
| 28 Mar 2027 | $264 | Vietjet | Chiang Mai International Airport (CNX) → Incheon International Airport (ICN) | 2 stops | found 4 days ago | Open this trip |
| 29 Mar 2027 | $169 | Air China | Chiang Mai International Airport (CNX) → Incheon International Airport (ICN) | 1 stop | found 4 days ago | Open this trip |
| 30 Mar 2027 | $169 | Air China | Chiang Mai International Airport (CNX) → Incheon International Airport (ICN) | 1 stop | found 4 days ago | Open this trip |
| 1 Apr 2027 | $168 | Air China | Chiang Mai International Airport (CNX) → Incheon International Airport (ICN) | 1 stop | found 4 days ago | Open this trip |
| 2 Apr 2027 | $240 | China Eastern | Chiang Mai International Airport (CNX) → Incheon International Airport (ICN) | 1 stop | found 4 days ago | Open this trip |
| 3 Apr 2027 | $169 | Air China | Chiang Mai International Airport (CNX) → Incheon International Airport (ICN) | 1 stop | found 4 days ago | Open this trip |
Which month looks cheapest?
April 2027 is the cheapest month — from $168.
Airlines on the cheapest dates: Air China, Thai AirAsia, Vietjet, China Eastern.
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 18 Dec – 26 Dec in another cabin: Premium economy · Business · First
Today's prices for 1 Apr 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 11 Nov (47 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
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $297 | $224 | +1% | 18 |
| 7–13 days | $295 | $261 | Cheapest seen | 22 |
| 14–29 days | $320 | $261 | +9% | 22 |
| 30–59 days | $372 | $330 | +26% | 42 |
| 60–89 days | $406 | $366 | +38% | 14 |
| 90–179 days | $401 | $377 | +36% | 11 |
One-way
Not enough history yet: in 14 days of one-way prices, 6 Oct to 11 Nov, fewer than 3 booking ranges had prices on 7 days or more.
Live price for these dates
The cheapest return found recently is for 18 Dec – 26 Dec. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a return flight from Chiang Mai to Seoul?
The cheapest return found recently is $412 with Air China, 18 Dec to 26 Dec, found 2 days ago. The cheapest return we hold, of any age, is $301 with Air China, 7 Dec to 13 Dec, found 3 days ago. The cheapest return fare on each of 7 departure dates is usually $377 to $420.
How much is a one-way flight from Chiang Mai to Seoul?
The cheapest one-way found recently is $168 with Air China, 1 Apr 2027, found 4 days ago. The cheapest one-way fare on each of 9 departure dates is usually $169 to $240.
What is the cheapest month to fly from Chiang Mai to Seoul?
December 2026 is the cheapest month for a return, from $301, 7 Dec to 13 Dec, found 3 days ago. April 2027 is the cheapest month for a one-way, from $168, 1 Apr 2027, found 4 days ago.
How far ahead should I book a flight from Chiang Mai to Seoul?
In 47 days of prices between 24 Sept and 11 Nov, return fares were cheapest 7 to 13 days before departure.
Is there a direct flight from Chiang Mai to Seoul?
Yes, the cheapest nonstop return found recently is $470 with Jin Air, 6 Feb 2027 to 7 Feb 2027, found 3 days ago.
How long is the flight from Chiang Mai to Seoul?
The cheapest one-way found recently, with Air China on 1 Apr 2027, takes 15 h 30 min with 1 stop.
Which airlines have the cheapest flights from Chiang Mai to Seoul?
Between 7 Dec and 10 Apr 2027, Air China has the cheapest return on 5 of the 7 departure dates we hold, China Eastern on 1 and China Southern Airlines on 1. Between 10 Feb 2027 and 3 Apr 2027, Air China has the cheapest one-way on 6 of the 9 departure dates we hold, Thai AirAsia on 1 and Vietjet on 1.
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