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Koh Samui to Bangkok flights in December 2026 from $125 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 $294 with Bangkok Airways, 21 Dec – 24 Dec, found 2 days ago. The cheapest one-way found recently is $125 with Bangkok Airways, 18 Dec, found 2 days ago.

Return

In December 2026, the cheapest return fare on each of 15 departure dates is usually $255 to $293. Across all 55 departure dates we hold on this route, it is usually $225 to $286. Of the 5 months with enough return fares to compare, 2 are usually cheaper than December 2026.

Cheapest return found recently

$294

21 Dec – 24 Dec · Bangkok Airways

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

out nonstop, back nonstop

found 2 days ago

See prices for these datesCheck today's price

Cheapest we hold, of any age

$226

10 Dec – 14 Dec · Bangkok Airways

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

out nonstop, back nonstop

found 4 days ago

See prices for these datesCheck today's price

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
10 Dec – 14 Dec$226Bangkok Airwaysout nonstop, back nonstopfound 4 days agoSee prices for these dates
25 Dec – 15 Jan 2027$232Bangkok Airwaysout nonstop, back nonstopfound 7 days agoSee prices for these dates
31 Dec – 3 Jan 2027$236Bangkok Airwaysout nonstop, back nonstopfound 5 days agoSee prices for these dates
4 Dec – 6 Dec$252Bangkok Airwaysout nonstop, back nonstopfound 4 days agoSee prices for these dates
27 Dec – 10 Jan 2027$257Bangkok Airwaysout nonstop, back nonstopfound 3 days agoSee prices for these dates

Every date we hold

15 departure dates

1 Dec – 16 Dec: $291, found 4 days ago4 Dec – 6 Dec: $252, found 4 days ago5 Dec – 6 Dec: $261, found 7 days ago7 Dec – 11 Dec: $262, found 4 days ago9 Dec – 10 Dec: $271, found 5 days ago10 Dec – 14 Dec: $226, found 4 days ago11 Dec – 14 Dec: $306, found 4 days ago12 Dec – 19 Dec: $301, found 4 days ago21 Dec – 24 Dec: $294, found 2 days ago23 Dec – 27 Dec: $276, found 7 days ago25 Dec – 15 Jan 2027: $232, found 7 days ago26 Dec – 9 Jan 2027: $262, found 7 days ago27 Dec – 10 Jan 2027: $257, found 3 days ago30 Dec – 3 Jan 2027: $349, found 3 days ago31 Dec – 3 Jan 2027: $236, 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 – 16 Dec$291Bangkok AirwaysKoh Samui Airport (USM) → Don Mueang International Airport (DMK)out nonstop, back nonstopfound 4 days agoSee prices for these dates
4 Dec – 6 Dec$252Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)out nonstop, back nonstopfound 4 days agoSee prices for these dates
5 Dec – 6 Dec$261Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)out nonstop, back nonstopfound 7 days agoSee prices for these dates
7 Dec – 11 Dec$262Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)out nonstop, back nonstopfound 4 days agoSee prices for these dates
9 Dec – 10 Dec$271Bangkok AirwaysKoh Samui Airport (USM) → Don Mueang International Airport (DMK)out nonstop, back nonstopfound 5 days agoSee prices for these dates
10 Dec – 14 Dec$226Bangkok AirwaysKoh Samui Airport (USM) → Don Mueang International Airport (DMK)out nonstop, back nonstopfound 4 days agoSee prices for these dates
11 Dec – 14 Dec$306Bangkok AirwaysKoh Samui Airport (USM) → Don Mueang International Airport (DMK)out nonstop, back nonstopfound 4 days agoSee prices for these dates
12 Dec – 19 Dec$301Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)out nonstop, back nonstopfound 4 days agoSee prices for these dates
21 Dec – 24 Dec$294Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)out nonstop, back nonstopfound 2 days agoSee prices for these dates
23 Dec – 27 Dec$276Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)out nonstop, back nonstopfound 7 days agoSee prices for these dates
25 Dec – 15 Jan 2027$232Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)out nonstop, back nonstopfound 7 days agoSee prices for these dates
26 Dec – 9 Jan 2027$262Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)out nonstop, back nonstopfound 7 days agoSee prices for these dates
27 Dec – 10 Jan 2027$257Bangkok AirwaysKoh Samui Airport (USM) → Don Mueang International Airport (DMK)out nonstop, back nonstopfound 3 days agoSee prices for these dates
30 Dec – 3 Jan 2027$349Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)out nonstop, back nonstopfound 3 days agoSee prices for these dates
31 Dec – 3 Jan 2027$236Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)out nonstop, back nonstopfound 5 days agoSee prices for these dates

Which month looks cheapest?

November 2026 is the cheapest month — from $103.

November 2026From $103Cheapest seen7 departure dates14 Nov – 17 Nov · found 4 days agoSee prices for these datesEvery date in November 2026
December 2026From $22615 departure dates10 Dec – 14 Dec · found 4 days agoSee prices for these dates
January 2027From $24313 departure dates31 Jan 2027 – 13 Feb 2027 · found 5 days agoSee prices for these datesEvery date in January 2027
February 2027From $1749 departure dates23 Feb 2027 – 6 Mar 2027 · found 3 days agoSee prices for these datesEvery date in February 2027
March 2027From $2264 departure dates2 Mar 2027 – 14 Mar 2027 · found 6 days agoSee prices for these datesEvery date in March 2027
April 2027From $1732 departure dates11 Apr 2027 – 24 Apr 2027 · found 6 days agoSee prices for these datesEvery date in April 2027
May 2027From $1732 departure dates1 May 2027 – 12 May 2027 · found 8 days agoSee prices for these dates
June 2027From $1731 departure date16 Jun 2027 – 27 Jun 2027 · found 5 days agoSee prices for these dates
July 2027From $1741 departure date5 Jul 2027 – 15 Jul 2027 · found 6 days agoSee prices for these dates
August 2027From $1741 departure date1 Aug 2027 – 14 Aug 2027 · found 6 days agoSee prices for these dates

One-way

In December 2026, the cheapest one-way fare on each of 15 departure dates is usually $104 to $126. Across all 106 departure dates we hold on this route, it is usually $90 to $137. Of the 11 months with enough one-way fares to compare, 6 are usually cheaper than December 2026.

Cheapest one-way found recently

$125

18 Dec · Bangkok Airways

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

nonstop

found 2 days ago

Open this tripCheck today's price

Cheapest we hold, of any age

$90

23 Dec · Bangkok Airways

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

nonstop

found 5 days ago

Open this tripCheck today's price

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
23 Dec$90Bangkok Airwaysnonstopfound 5 days agoOpen this trip
27 Dec$96Bangkok Airwaysnonstopfound 7 days agoOpen this trip
1 Dec$102Bangkok Airwaysnonstopfound 3 days agoOpen this trip
24 Dec$102Bangkok Airwaysnonstopfound 5 days agoOpen this trip
25 Dec$106Bangkok Airwaysnonstopfound 7 days agoOpen this trip

Every date we hold

15 departure dates

1 Dec: $102, found 3 days ago2 Dec: $126, found 5 days ago3 Dec: $113, found 4 days ago8 Dec: $114, found 6 days ago15 Dec: $115, found 3 days ago17 Dec: $114, found 3 days ago18 Dec: $125, found 2 days ago22 Dec: $115, found 7 days ago23 Dec: $90, found 5 days ago24 Dec: $102, found 5 days ago25 Dec: $106, found 7 days ago26 Dec: $135, found 2 days ago27 Dec: $96, found 7 days ago28 Dec: $140, found 2 days ago31 Dec: $129, 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$102Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 3 days agoOpen this trip
2 Dec$126Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 5 days agoOpen this trip
3 Dec$113Bangkok AirwaysKoh Samui Airport (USM) → Don Mueang International Airport (DMK)nonstopfound 4 days agoOpen this trip
8 Dec$114Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 6 days agoOpen this trip
15 Dec$115Bangkok AirwaysKoh Samui Airport (USM) → Don Mueang International Airport (DMK)nonstopfound 3 days agoOpen this trip
17 Dec$114Bangkok AirwaysKoh Samui Airport (USM) → Don Mueang International Airport (DMK)nonstopfound 3 days agoOpen this trip
18 Dec$125Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 2 days agoOpen this trip
22 Dec$115Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 7 days agoOpen this trip
23 Dec$90Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 5 days agoOpen this trip
24 Dec$102Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 5 days agoOpen this trip
25 Dec$106Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 7 days agoOpen this trip
26 Dec$135Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 2 days agoOpen this trip
27 Dec$96Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 7 days agoOpen this trip
28 Dec$140Bangkok AirwaysKoh Samui Airport (USM) → Don Mueang International Airport (DMK)nonstopfound 2 days agoOpen this trip
31 Dec$129Bangkok AirwaysKoh Samui Airport (USM) → Suvarnabhumi Airport (BKK)nonstopfound 5 days agoOpen this trip

Which month looks cheapest?

November 2026 is the cheapest month — from $50.

November 2026From $50Cheapest seen17 departure dates19 Nov · found 2 days agoOpen this tripEvery date in November 2026
December 2026From $9015 departure dates23 Dec · found 5 days agoOpen this trip
January 2027From $864 departure dates1 Jan 2027 · found 5 days agoOpen this tripEvery date in January 2027
February 2027From $899 departure dates6 Feb 2027 · found 2 days agoOpen this tripEvery date in February 2027
March 2027From $8726 departure dates11 Mar 2027 · found 2 days agoOpen this tripEvery date in March 2027
April 2027From $8910 departure dates27 Apr 2027 · found 2 days agoOpen this tripEvery date in April 2027
May 2027From $896 departure dates1 May 2027 · found 2 days agoOpen this trip
June 2027From $906 departure dates3 Jun 2027 · found 5 days agoOpen this trip
July 2027From $895 departure dates18 Jul 2027 · found 2 days agoOpen this trip
August 2027From $904 departure dates5 Aug 2027 · found 5 days agoOpen this trip
September 2027From $901 departure date15 Sept 2027 · found 4 days agoOpen this trip
October 2027From $903 departure dates21 Oct 2027 · found 7 days agoOpen 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