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Seoul to Bangkok in December 2026 GMP, ICN → BKK, DMK

Gimpo International Airport (GMP), Incheon International Airport (ICN) → Suvarnabhumi Airport (BKK), Don Mueang International Airport (DMK)

For departures in December 2026, the cheapest return found recently is $328 with Shandong Airlines, 3 Dec – 12 Dec, found yesterday.

Return

In December 2026, the cheapest return fare on each of 12 departure dates is usually $333 to $373. Across all 51 departure dates we hold on this route, it is usually $332 to $370. Of the 5 months with enough return fares to compare, 2 are usually cheaper than December 2026.

Cheapest return found recently

$328

3 Dec – 12 Dec · Shandong Airlines

Incheon International Airport (ICN) → Suvarnabhumi Airport (BKK)

out 1 stop, back 1 stop

found yesterday

See prices for these datesCheck today's price

It is also the cheapest return we hold, of any age.

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
3 Dec – 12 Dec$328Shandong Airlinesout 1 stop, back 1 stopfound yesterdaySee prices for these dates
21 Dec – 1 Feb 2027$331China Easternout 2 stops, back 1 stopfound yesterdaySee prices for these dates
2 Dec – 7 Dec$332China Easternout 1 stop, back 1 stopfound 6 days agoSee prices for these dates
9 Dec – 15 Dec$333Shanghai Airlinesout 1 stop, back 1 stopfound 5 days agoSee prices for these dates
18 Dec – 28 Dec$351China Easternout 2 stops, back 1 stopfound yesterdaySee prices for these dates

Every date we hold

12 departure dates

2 Dec – 7 Dec: $332, found 6 days ago3 Dec – 12 Dec: $328, found yesterday4 Dec – 12 Dec: $355, found yesterday7 Dec – 7 Dec: $369, found 2 days ago9 Dec – 15 Dec: $333, found 5 days ago15 Dec – 26 Dec: $354, found today18 Dec – 28 Dec: $351, found yesterday20 Dec – 30 Dec: $381, found 3 days ago21 Dec – 1 Feb 2027: $331, found yesterday24 Dec – 10 Jan 2027: $408, found 4 days ago28 Dec – 3 Jan 2027: $386, found 6 days ago29 Dec – 4 Jan 2027: $370, found 6 days agoDec
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
2 Dec – 7 Dec$332China EasternIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates
3 Dec – 12 Dec$328Shandong AirlinesIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound yesterdaySee prices for these dates
4 Dec – 12 Dec$355Air ChinaGimpo International Airport (GMP) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound yesterdaySee prices for these dates
7 Dec – 7 Dec$369China EasternIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 2 days agoSee prices for these dates
9 Dec – 15 Dec$333Shanghai AirlinesIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 5 days agoSee prices for these dates
15 Dec – 26 Dec$354Vietnam AirlinesIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound todaySee prices for these dates
18 Dec – 28 Dec$351China EasternIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 2 stops, back 1 stopfound yesterdaySee prices for these dates
20 Dec – 30 Dec$381China Southern AirlinesIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 3 days agoSee prices for these dates
21 Dec – 1 Feb 2027$331China EasternIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 2 stops, back 1 stopfound yesterdaySee prices for these dates
24 Dec – 10 Jan 2027$408China EasternIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 4 days agoSee prices for these dates
28 Dec – 3 Jan 2027$386Shandong AirlinesIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates
29 Dec – 4 Jan 2027$370China EasternIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates

Which month looks cheapest?

November 2026 is the cheapest month — from $285.

October 2026From $3033 departure dates26 Oct – 9 Nov · found 2 days agoSee prices for these dates
November 2026From $285Cheapest seen15 departure dates2 Nov – 11 Nov · found 6 days agoSee prices for these datesEvery date in November 2026
December 2026From $32812 departure dates3 Dec – 12 Dec · found yesterdaySee prices for these dates
January 2027From $32813 departure dates25 Jan 2027 – 1 Feb 2027 · found 2 days agoSee prices for these datesEvery date in January 2027
February 2027From $2976 departure dates15 Feb 2027 – 25 Feb 2027 · found 6 days agoSee prices for these dates
March 2027From $3522 departure dates2 Mar 2027 – 11 Mar 2027 · found yesterdaySee prices for these dates

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