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Bangkok to Koh Samui in December 2026 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 $250 with Bangkok Airways, 23 Dec – 19 Jan 2027, found today.

Return

In December 2026, the cheapest return fare on each of 25 departure dates is usually $250 to $318. Across all 184 departure dates we hold on this route, it is usually $173 to $246. Of the 12 months with enough return fares to compare, December 2026 is usually the most expensive.

Cheapest return found recently

$250

23 Dec – 19 Jan 2027 · Bangkok Airways

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

out nonstop, back nonstop

found today

See prices for these datesCheck today's price

Cheapest we hold, of any age

$172

2 Dec – 24 Dec · Bangkok Airways

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

out nonstop, back nonstop

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 – 24 Dec$172Bangkok Airwaysout nonstop, back nonstopfound 3 days agoSee prices for these dates
11 Dec – 17 Dec$176Bangkok Airwaysout nonstop, back nonstopfound 4 days agoSee prices for these dates
1 Dec – 24 Dec$206Bangkok Airwaysout nonstop, back nonstopfound 3 days agoSee prices for these dates
13 Dec – 19 Dec$208Bangkok Airwaysout nonstop, back nonstopfound 3 days agoSee prices for these dates
12 Dec – 22 Dec$209Bangkok Airwaysout nonstop, back nonstopfound 5 days agoSee prices for these dates

Every date we hold

25 departure dates

1 Dec – 24 Dec: $206, found 3 days ago2 Dec – 24 Dec: $172, found 3 days ago3 Dec – 26 Dec: $308, found yesterday4 Dec – 11 Jan 2027: $314, found 3 days ago6 Dec – 17 Dec: $217, found 6 days ago8 Dec – 21 Dec: $261, found yesterday11 Dec – 17 Dec: $176, found 4 days ago12 Dec – 22 Dec: $209, found 5 days ago13 Dec – 19 Dec: $208, found 3 days ago14 Dec – 24 Dec: $295, found 2 days ago15 Dec – 23 Dec: $254, found 3 days ago16 Dec – 2 Jan 2027: $277, found 6 days ago17 Dec – 11 Jan 2027: $356, found 5 days ago18 Dec – 18 Dec: $340, found 4 days ago19 Dec – 18 Jan 2027: $318, found 6 days ago20 Dec – 24 Dec: $269, found yesterday21 Dec – 18 Jan 2027: $262, found 4 days ago22 Dec – 23 Dec: $264, found yesterday23 Dec – 19 Jan 2027: $250, found today24 Dec – 24 Dec: $300, found 5 days ago25 Dec – 30 Jan 2027: $257, found yesterday26 Dec – 18 Jan 2027: $319, found 5 days ago27 Dec – 22 Jan 2027: $346, found 3 days ago29 Dec – 23 Jan 2027: $359, found today31 Dec – 20 Jan 2027: $320, found 5 days agoDec
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
1 Dec – 24 Dec$206Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 3 days agoSee prices for these dates
2 Dec – 24 Dec$172Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 3 days agoSee prices for these dates
3 Dec – 26 Dec$308Bangkok AirwaysDon Mueang International Airport (DMK) → Koh Samui Airport (USM)out nonstop, back nonstopfound yesterdaySee prices for these dates
4 Dec – 11 Jan 2027$314Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 3 days agoSee prices for these dates
6 Dec – 17 Dec$217Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 6 days agoSee prices for these dates
8 Dec – 21 Dec$261Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound yesterdaySee prices for these dates
11 Dec – 17 Dec$176Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 4 days agoSee prices for these dates
12 Dec – 22 Dec$209Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 5 days agoSee prices for these dates
13 Dec – 19 Dec$208Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 3 days agoSee prices for these dates
14 Dec – 24 Dec$295Bangkok AirwaysDon Mueang International Airport (DMK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 2 days agoSee prices for these dates
15 Dec – 23 Dec$254Bangkok AirwaysDon Mueang International Airport (DMK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 3 days agoSee prices for these dates
16 Dec – 2 Jan 2027$277Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 6 days agoSee prices for these dates
17 Dec – 11 Jan 2027$356Bangkok AirwaysDon Mueang International Airport (DMK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 5 days agoSee prices for these dates
18 Dec – 18 Dec$340Bangkok AirwaysDon Mueang International Airport (DMK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 4 days agoSee prices for these dates
19 Dec – 18 Jan 2027$318Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 6 days agoSee prices for these dates
20 Dec – 24 Dec$269Bangkok AirwaysDon Mueang International Airport (DMK) → Koh Samui Airport (USM)out nonstop, back nonstopfound yesterdaySee prices for these dates
21 Dec – 18 Jan 2027$262Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 4 days agoSee prices for these dates
22 Dec – 23 Dec$264Bangkok AirwaysDon Mueang International Airport (DMK) → Koh Samui Airport (USM)out nonstop, back nonstopfound yesterdaySee prices for these dates
23 Dec – 19 Jan 2027$250Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound todaySee prices for these dates
24 Dec – 24 Dec$300Bangkok AirwaysDon Mueang International Airport (DMK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 5 days agoSee prices for these dates
25 Dec – 30 Jan 2027$257Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound yesterdaySee prices for these dates
26 Dec – 18 Jan 2027$319Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 5 days agoSee prices for these dates
27 Dec – 22 Jan 2027$346Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 3 days agoSee prices for these dates
29 Dec – 23 Jan 2027$359Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound todaySee prices for these dates
31 Dec – 20 Jan 2027$320Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 5 days agoSee prices for these dates

Which month looks cheapest?

November 2026 is the cheapest month — from $154.

October 2026From $1639 departure dates27 Oct – 4 Nov · found 3 days agoSee prices for these datesEvery date in October 2026
November 2026From $154Cheapest seen26 departure dates2 Nov – 7 Nov · found 5 days agoSee prices for these datesEvery date in November 2026
December 2026From $17225 departure dates2 Dec – 24 Dec · found 3 days agoSee prices for these dates
January 2027From $17328 departure dates25 Jan 2027 – 6 Mar 2027 · found 6 days agoSee prices for these datesEvery date in January 2027
February 2027From $17023 departure dates22 Feb 2027 – 8 Mar 2027 · found yesterdaySee prices for these datesEvery date in February 2027
March 2027From $16519 departure dates14 Mar 2027 – 23 Mar 2027 · found 2 days agoSee prices for these datesEvery date in March 2027
April 2027From $17017 departure dates6 Apr 2027 – 15 Apr 2027 · found todaySee prices for these datesEvery date in April 2027
May 2027From $17312 departure dates18 May 2027 – 3 Jun 2027 · found 3 days agoSee prices for these datesEvery date in May 2027
June 2027From $1706 departure dates25 Jun 2027 – 16 Jul 2027 · found yesterdaySee prices for these dates
July 2027From $1708 departure dates30 Jul 2027 – 5 Aug 2027 · found yesterdaySee prices for these datesEvery date in July 2027
August 2027From $1707 departure dates1 Aug 2027 – 7 Aug 2027 · found yesterdaySee prices for these datesEvery date in August 2027
September 2027From $1704 departure dates27 Sept 2027 – 10 Oct 2027 · found 21 hours 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