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Seoul to Bangkok flights in December 2026 from $310 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 $310 with Shandong Airlines, 3 Dec – 9 Dec, found yesterday.

Return

In December 2026, the cheapest return fare on each of 18 departure dates is usually $316 to $346. Across all 62 departure dates we hold on this route, it is usually $321 to $361. Of the 5 months with enough return fares to compare, 2 are usually cheaper than December 2026.

Cheapest return found recently

$310

3 Dec – 9 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

Cheapest we hold, of any age

$303

2 Dec – 16 Dec · Shandong Airlines

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

out 1 stop, back 1 stop

found 3 days ago

See prices for these datesCheck today's price

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
2 Dec – 16 Dec$303Shandong Airlinesout 1 stop, back 1 stopfound 3 days agoSee prices for these dates
31 Dec – 9 Jan 2027$307Shandong Airlinesout 1 stop, back 1 stopfound 6 days agoSee prices for these dates
21 Dec – 11 Jan 2027$308China Easternout 2 stops, back 1 stopfound 4 days agoSee prices for these dates
3 Dec – 9 Dec$310Shandong Airlinesout 1 stop, back 1 stopfound yesterdaySee prices for these dates
7 Dec – 13 Dec$314China Easternout 1 stop, back 1 stopfound 8 days agoSee prices for these dates

Every date we hold

18 departure dates

1 Dec – 1 Dec: $351, found 6 days ago2 Dec – 16 Dec: $303, found 3 days ago3 Dec – 9 Dec: $310, found yesterday5 Dec – 7 Dec: $322, found 6 days ago7 Dec – 13 Dec: $314, found 8 days ago8 Dec – 22 Dec: $331, found 4 days ago10 Dec – 3 Jan 2027: $351, found 6 days ago11 Dec – 8 Jan 2027: $324, found 6 days ago12 Dec – 4 Jan 2027: $330, found 6 days ago14 Dec – 26 Dec: $350, found 3 days ago15 Dec – 6 Jan 2027: $323, found 6 days ago20 Dec – 10 Jan 2027: $333, found 2 days ago21 Dec – 11 Jan 2027: $308, found 4 days ago24 Dec – 9 Jan 2027: $411, found 5 days ago25 Dec – 15 Jan 2027: $322, found 7 days ago26 Dec – 16 Jan 2027: $323, found 4 days ago29 Dec – 12 Jan 2027: $366, found 5 days ago31 Dec – 9 Jan 2027: $307, found 6 days agoDec
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
1 Dec – 1 Dec$351HK ExpressIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates
2 Dec – 16 Dec$303Shandong AirlinesIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 3 days agoSee prices for these dates
3 Dec – 9 Dec$310Shandong AirlinesIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound yesterdaySee prices for these dates
5 Dec – 7 Dec$322Vietnam AirlinesIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates
7 Dec – 13 Dec$314China EasternIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 8 days agoSee prices for these dates
8 Dec – 22 Dec$331Shanghai AirlinesIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 4 days agoSee prices for these dates
10 Dec – 3 Jan 2027$351China EasternIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates
11 Dec – 8 Jan 2027$324Shandong AirlinesIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates
12 Dec – 4 Jan 2027$330China EasternIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates
14 Dec – 26 Dec$350Vietnam AirlinesIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 3 days agoSee prices for these dates
15 Dec – 6 Jan 2027$323Vietnam AirlinesIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates
20 Dec – 10 Jan 2027$333China EasternIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 2 stops, back 1 stopfound 2 days agoSee prices for these dates
21 Dec – 11 Jan 2027$308China EasternIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 2 stops, back 1 stopfound 4 days agoSee prices for these dates
24 Dec – 9 Jan 2027$411Xiamen AirlinesIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 5 days agoSee prices for these dates
25 Dec – 15 Jan 2027$322China EasternIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 2 stops, back 1 stopfound 7 days agoSee prices for these dates
26 Dec – 16 Jan 2027$323China EasternIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 2 stops, back 1 stopfound 4 days agoSee prices for these dates
29 Dec – 12 Jan 2027$366China EasternIncheon International Airport (ICN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 5 days agoSee prices for these dates
31 Dec – 9 Jan 2027$307Shandong AirlinesIncheon 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 $290.

November 2026From $290Cheapest seen7 departure dates25 Nov – 1 Dec · found 4 days agoSee prices for these datesEvery date in November 2026
December 2026From $30318 departure dates2 Dec – 16 Dec · found 3 days agoSee prices for these dates
January 2027From $32314 departure dates12 Jan 2027 – 31 Jan 2027 · found 5 days agoSee prices for these datesEvery date in January 2027
February 2027From $32911 departure dates14 Feb 2027 – 28 Feb 2027 · found 5 days agoSee prices for these datesEvery date in February 2027
March 2027From $2974 departure dates4 Mar 2027 – 11 Mar 2027 · found 7 days agoSee prices for these dates
May 2027From $3232 departure dates15 May 2027 – 21 May 2027 · found 5 days agoSee prices for these dates
June 2027From $3191 departure date14 Jun 2027 – 3 Jul 2027 · found 8 days agoSee prices for these dates
July 2027From $3152 departure dates7 Jul 2027 – 28 Jul 2027 · found 6 days agoSee prices for these dates
August 2027From $2952 departure dates22 Aug 2027 – 28 Aug 2027 · found 3 days agoSee prices for these dates
October 2027From $3151 departure date4 Oct 2027 – 9 Oct 2027 · found 6 days agoSee 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