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Koh Samui to Bangkok in December 2026 USM → BKK, DMK

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

For departures in December 2026, the cheapest return found recently is $229 with Bangkok Airways, 19 Dec – 3 Jan 2027, found yesterday. The cheapest one-way found recently is $89 with Bangkok Airways, 1 Dec, found yesterday.

Return

In December 2026, the cheapest return fare on each of 9 departure dates is usually $229 to $301. Across all 47 departure dates we hold on this route, it is usually $173 to $289. Of the 6 months with enough return fares to compare, 4 are usually cheaper than December 2026.

Cheapest return found recently

$229

19 Dec – 3 Jan 2027 · Bangkok Airways

Koh Samui Airport (USM) → Don Mueang International Airport (DMK)

out nonstop, back nonstop

found yesterday

See prices for these datesCheck today's price

Cheapest we hold, of any age

$206

22 Dec – 12 Jan 2027 · Bangkok Airways

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

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
22 Dec – 12 Jan 2027$206Bangkok Airwaysout nonstop, back nonstopfound 3 days agoSee prices for these dates
2 Dec – 23 Dec$208Bangkok Airwaysout nonstop, back nonstopfound 3 days agoSee prices for these dates
19 Dec – 3 Jan 2027$229Bangkok Airwaysout nonstop, back nonstopfound yesterdaySee prices for these dates
4 Dec – 10 Dec$250Bangkok Airwaysout nonstop, back nonstopfound yesterdaySee prices for these dates
25 Dec – 3 Jan 2027$289Bangkok Airwaysout nonstop, back nonstopfound 6 days agoSee prices for these dates

Every date we hold

9 departure dates

2 Dec – 23 Dec: $208, found 3 days ago4 Dec – 10 Dec: $250, found yesterday11 Dec – 22 Dec: $309, found 5 days ago12 Dec – 22 Dec: $301, found 5 days ago19 Dec – 3 Jan 2027: $229, found yesterday22 Dec – 12 Jan 2027: $206, found 3 days ago25 Dec – 3 Jan 2027: $289, found 6 days ago26 Dec – 9 Jan 2027: $310, found 4 days ago30 Dec – 11 Jan 2027: $289, found 5 days agoDec
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
2 Dec – 23 Dec$208Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)out nonstop, back nonstopfound 3 days agoSee prices for these dates
4 Dec – 10 Dec$250Bangkok AirwaysKoh Samui Airport (USM) → Don Mueang International Airport (DMK)out nonstop, back nonstopfound yesterdaySee prices for these dates
11 Dec – 22 Dec$309Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)out nonstop, back nonstopfound 5 days agoSee prices for these dates
12 Dec – 22 Dec$301Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)out nonstop, back nonstopfound 5 days agoSee prices for these dates
19 Dec – 3 Jan 2027$229Bangkok AirwaysKoh Samui Airport (USM) → Don Mueang International Airport (DMK)out nonstop, back nonstopfound yesterdaySee prices for these dates
22 Dec – 12 Jan 2027$206Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)out nonstop, back nonstopfound 3 days agoSee prices for these dates
25 Dec – 3 Jan 2027$289Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)out nonstop, back nonstopfound 6 days agoSee prices for these dates
26 Dec – 9 Jan 2027$310Bangkok AirwaysKoh Samui Airport (USM) → Don Mueang International Airport (DMK)out nonstop, back nonstopfound 4 days agoSee prices for these dates
30 Dec – 11 Jan 2027$289Bangkok AirwaysKoh Samui Airport (USM) → Don Mueang International Airport (DMK)out nonstop, back nonstopfound 5 days agoSee prices for these dates

Which month looks cheapest?

November 2026 is the cheapest month — from $155.

October 2026From $1765 departure dates25 Oct – 2 Nov · found yesterdaySee prices for these dates
November 2026From $155Cheapest seen9 departure dates18 Nov – 30 Nov · found 6 days agoSee prices for these datesEvery date in November 2026
December 2026From $2069 departure dates22 Dec – 12 Jan 2027 · found 3 days agoSee prices for these dates
January 2027From $2478 departure dates15 Jan 2027 – 11 Mar 2027 · found 5 days agoSee prices for these datesEvery date in January 2027
February 2027From $2058 departure dates25 Feb 2027 – 4 Mar 2027 · found yesterdaySee prices for these datesEvery date in February 2027
March 2027From $1704 departure dates4 Mar 2027 – 14 Mar 2027 · found 20 hours agoSee prices for these datesEvery date in March 2027
April 2027From $1701 departure date12 Apr 2027 – 23 Apr 2027 · found 22 hours agoSee prices for these datesEvery date in April 2027
May 2027From $1731 departure date14 May 2027 – 3 Jun 2027 · found 2 days agoSee prices for these dates
June 2027From $1731 departure date13 Jun 2027 – 19 Jun 2027 · found 2 days agoSee prices for these dates
September 2027From $1701 departure date17 Sept 2027 – 4 Oct 2027 · found yesterdaySee prices for these dates

One-way

In December 2026, the cheapest one-way fare on each of 19 departure dates is usually $90 to $135. Across all 120 departure dates we hold on this route, it is usually $90 to $135. Of the 10 months with enough one-way fares to compare, 7 are usually cheaper than December 2026.

Cheapest one-way found recently

$89

1 Dec · Bangkok Airways

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

nonstop

found yesterday

Open this tripCheck today's price

It is also the cheapest one-way we hold, of any age.

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
1 Dec$89Bangkok Airwaysnonstopfound yesterdayOpen this trip
17 Dec$89Bangkok Airwaysnonstopfound yesterdayOpen this trip
23 Dec$89Bangkok Airwaysnonstopfound 5 days agoOpen this trip
3 Dec$90Bangkok Airwaysnonstopfound 4 days agoOpen this trip
4 Dec$90Bangkok Airwaysnonstopfound 6 days agoOpen this trip

Every date we hold

19 departure dates

1 Dec: $89, found yesterday2 Dec: $100, found 2 days ago3 Dec: $90, found 4 days ago4 Dec: $90, found 6 days ago6 Dec: $135, found yesterday7 Dec: $135, found yesterday8 Dec: $135, found yesterday10 Dec: $135, found 4 days ago11 Dec: $145, found 4 days ago12 Dec: $137, found 2 days ago14 Dec: $126, found 4 days ago17 Dec: $89, found yesterday21 Dec: $101, found 4 days ago22 Dec: $99, found 3 days ago23 Dec: $89, found 5 days ago24 Dec: $90, found yesterday25 Dec: $90, found 6 days ago27 Dec: $99, found 5 days ago31 Dec: $182, 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$89Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound yesterdayOpen this trip
2 Dec$100Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 2 days agoOpen this trip
3 Dec$90Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 4 days agoOpen this trip
4 Dec$90Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 6 days agoOpen this trip
6 Dec$135Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound yesterdayOpen this trip
7 Dec$135Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound yesterdayOpen this trip
8 Dec$135Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound yesterdayOpen this trip
10 Dec$135Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 4 days agoOpen this trip
11 Dec$145Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 4 days agoOpen this trip
12 Dec$137Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 2 days agoOpen this trip
14 Dec$126Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 4 days agoOpen this trip
17 Dec$89Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound yesterdayOpen this trip
21 Dec$101Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 4 days agoOpen this trip
22 Dec$99Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 3 days agoOpen this trip
23 Dec$89Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 5 days agoOpen this trip
24 Dec$90Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound yesterdayOpen this trip
25 Dec$90Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 6 days agoOpen this trip
27 Dec$99Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 5 days agoOpen this trip
31 Dec$182Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 6 days agoOpen this trip

Which month looks cheapest?

November 2026 is the cheapest month — from $75.

October 2026From $815 departure dates24 Oct · found yesterdayOpen this trip
November 2026From $75Cheapest seen25 departure dates6 Nov · found 5 days agoOpen this tripEvery date in November 2026
December 2026From $8919 departure dates1 Dec · found yesterdayOpen this trip
January 2027From $13914 departure dates18 Jan 2027 · found 3 days agoOpen this tripEvery date in January 2027
February 2027From $9116 departure dates11 Feb 2027 · found 2 days agoOpen this tripEvery date in February 2027
March 2027From $8921 departure dates10 Mar 2027 · found yesterdayOpen this tripEvery date in March 2027
April 2027From $908 departure dates4 Apr 2027 · found 4 days agoOpen this tripEvery date in April 2027
May 2027From $903 departure dates1 May 2027 · found 3 days agoOpen this trip
June 2027From $903 departure dates7 Jun 2027 · found 3 days agoOpen this trip
July 2027From $904 departure dates3 Jul 2027 · found 3 days agoOpen this trip
September 2027From $892 departure dates6 Sept 2027 · found yesterdayOpen this trip

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