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Bangkok to Koh Samui flights in December 2026 from $231 BKK, DMK → USM

Suvarnabhumi Airport (BKK), Don Mueang International Airport (DMK) → Koh Samui Airport (USM)

For departures in December 2026, the cheapest return found recently is $231 with Bangkok Airways, 3 Dec – 21 Dec, found 2 days ago.

Return

In December 2026, the cheapest return fare on each of 30 departure dates is usually $241 to $328. Across all 223 departure dates we hold on this route, it is usually $173 to $243. Of the 11 months with enough return fares to compare, December 2026 is usually the most expensive.

Cheapest return found recently

$231

3 Dec – 21 Dec · Bangkok Airways

Suvarnabhumi Airport (BKK) → Koh Samui Airport (USM)

out nonstop, back nonstop

found 2 days ago

See prices for these datesCheck today's price

Cheapest we hold, of any age

$207

9 Dec – 24 Dec · Bangkok Airways

Suvarnabhumi Airport (BKK) → Koh Samui Airport (USM)

out nonstop, back nonstop

found 7 days ago

See prices for these datesCheck today's price

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
9 Dec – 24 Dec$207Bangkok Airwaysout nonstop, back nonstopfound 7 days agoSee prices for these dates
12 Dec – 23 Dec$216Bangkok Airwaysout nonstop, back nonstopfound 5 days agoSee prices for these dates
10 Dec – 1 Jan 2027$219Bangkok Airwaysout nonstop, back nonstopfound 5 days agoSee prices for these dates
11 Dec – 26 Dec$230Bangkok Airwaysout nonstop, back nonstopfound 3 days agoSee prices for these dates
3 Dec – 21 Dec$231Bangkok Airwaysout nonstop, back nonstopfound 2 days agoSee prices for these dates

Every date we hold

30 departure dates

1 Dec – 16 Dec: $232, found 4 days ago3 Dec – 21 Dec: $231, found 2 days ago4 Dec – 16 Dec: $241, found 5 days ago5 Dec – 16 Dec: $241, found 7 days ago6 Dec – 19 Dec: $252, found 7 days ago7 Dec – 17 Dec: $242, found 3 days ago8 Dec – 24 Dec: $241, found 5 days ago9 Dec – 24 Dec: $207, found 7 days ago10 Dec – 1 Jan 2027: $219, found 5 days ago11 Dec – 26 Dec: $230, found 3 days ago12 Dec – 23 Dec: $216, found 5 days ago13 Dec – 13 Jan 2027: $300, found 2 days ago14 Dec – 30 Dec: $358, found 5 days ago15 Dec – 21 Jan 2027: $330, found 4 days ago16 Dec – 18 Jan 2027: $308, found 4 days ago17 Dec – 25 Dec: $288, found 3 days ago18 Dec – 29 Dec: $264, found 6 days ago19 Dec – 13 Jan 2027: $331, found 7 days ago20 Dec – 21 Dec: $309, found 4 days ago21 Dec – 9 Jan 2027: $287, found 6 days ago22 Dec – 18 Jan 2027: $325, found 2 days ago23 Dec – 28 Dec: $324, found 3 days ago24 Dec – 15 Jan 2027: $357, found 2 days ago25 Dec – 25 Dec: $310, found 4 days ago26 Dec – 9 Jan 2027: $286, found 4 days ago27 Dec – 21 Jan 2027: $331, found 3 days ago28 Dec – 25 Jan 2027: $358, found 5 days ago29 Dec – 22 Jan 2027: $329, found 3 days ago30 Dec – 19 Jan 2027: $330, found 7 days ago31 Dec – 19 Jan 2027: $256, 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 – 16 Dec$232Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 4 days agoSee prices for these dates
3 Dec – 21 Dec$231Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 2 days agoSee prices for these dates
4 Dec – 16 Dec$241Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 5 days agoSee prices for these dates
5 Dec – 16 Dec$241Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 7 days agoSee prices for these dates
6 Dec – 19 Dec$252Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 7 days agoSee prices for these dates
7 Dec – 17 Dec$242Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 3 days agoSee prices for these dates
8 Dec – 24 Dec$241Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 5 days agoSee prices for these dates
9 Dec – 24 Dec$207Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 7 days agoSee prices for these dates
10 Dec – 1 Jan 2027$219Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 5 days agoSee prices for these dates
11 Dec – 26 Dec$230Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 3 days agoSee prices for these dates
12 Dec – 23 Dec$216Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 5 days agoSee prices for these dates
13 Dec – 13 Jan 2027$300Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 2 days agoSee prices for these dates
14 Dec – 30 Dec$358Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 5 days agoSee prices for these dates
15 Dec – 21 Jan 2027$330Bangkok AirwaysDon Mueang International Airport (DMK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 4 days agoSee prices for these dates
16 Dec – 18 Jan 2027$308Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 4 days agoSee prices for these dates
17 Dec – 25 Dec$288Bangkok AirwaysDon Mueang International Airport (DMK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 3 days agoSee prices for these dates
18 Dec – 29 Dec$264Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 6 days agoSee prices for these dates
19 Dec – 13 Jan 2027$331Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 7 days agoSee prices for these dates
20 Dec – 21 Dec$309Bangkok AirwaysDon Mueang International Airport (DMK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 4 days agoSee prices for these dates
21 Dec – 9 Jan 2027$287Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 6 days agoSee prices for these dates
22 Dec – 18 Jan 2027$325Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 2 days agoSee prices for these dates
23 Dec – 28 Dec$324Bangkok AirwaysDon Mueang International Airport (DMK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 3 days agoSee prices for these dates
24 Dec – 15 Jan 2027$357Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 2 days agoSee prices for these dates
25 Dec – 25 Dec$310Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 4 days agoSee prices for these dates
26 Dec – 9 Jan 2027$286Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 4 days agoSee prices for these dates
27 Dec – 21 Jan 2027$331Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 3 days agoSee prices for these dates
28 Dec – 25 Jan 2027$358Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 5 days agoSee prices for these dates
29 Dec – 22 Jan 2027$329Bangkok AirwaysDon Mueang International Airport (DMK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 3 days agoSee prices for these dates
30 Dec – 19 Jan 2027$330Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 7 days agoSee prices for these dates
31 Dec – 19 Jan 2027$256Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 6 days agoSee prices for these dates

Which month looks cheapest?

November 2026 is the cheapest month — from $104.

November 2026From $104Cheapest seen14 departure dates15 Nov – 15 Nov · found 5 days agoSee prices for these datesEvery date in November 2026
December 2026From $20730 departure dates9 Dec – 24 Dec · found 7 days agoSee prices for these dates
January 2027From $17430 departure dates27 Jan 2027 – 10 Mar 2027 · found 6 days agoSee prices for these datesEvery date in January 2027
February 2027From $17327 departure dates17 Feb 2027 – 16 Mar 2027 · found 2 days agoSee prices for these datesEvery date in February 2027
March 2027From $16326 departure dates3 Mar 2027 – 11 Mar 2027 · found 7 days agoSee prices for these datesEvery date in March 2027
April 2027From $16623 departure dates21 Apr 2027 – 20 May 2027 · found 5 days agoSee prices for these datesEvery date in April 2027
May 2027From $17114 departure dates30 May 2027 – 28 Jun 2027 · found yesterdaySee prices for these datesEvery date in May 2027
June 2027From $17214 departure dates3 Jun 2027 – 24 Jun 2027 · found 2 days agoSee prices for these datesEvery date in June 2027
July 2027From $15920 departure dates17 Jul 2027 – 4 Aug 2027 · found 3 days agoSee prices for these datesEvery date in July 2027
August 2027From $16716 departure dates20 Aug 2027 – 29 Aug 2027 · found 6 days agoSee prices for these datesEvery date in August 2027
September 2027From $1722 departure dates3 Sept 2027 – 28 Sept 2027 · found 2 days agoSee prices for these dates
October 2027From $1737 departure dates2 Oct 2027 – 16 Oct 2027 · found 2 days agoSee prices for these datesEvery date in October 2027

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