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

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

For departures in October 2026, the cheapest return found recently is $177 with Bangkok Airways, 23 Oct – 18 Nov, found today. The cheapest one-way found recently is $84 with Bangkok Airways, 20 Oct, found yesterday.

Return

In October 2026, the cheapest return fare on each of 9 departure dates is usually $165 to $177. 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, 2 are usually cheaper than October 2026.

Cheapest return found recently

$177

23 Oct – 18 Nov · 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

$163

27 Oct – 4 Nov · 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 October 2026

DatesFromAirlineStopsFound
27 Oct – 4 Nov$163Bangkok Airwaysout nonstop, back nonstopfound 3 days agoSee prices for these dates
28 Oct – 17 Nov$165Bangkok Airwaysout nonstop, back nonstopfound 6 days agoSee prices for these dates
30 Oct – 16 Nov$165Bangkok Airwaysout nonstop, back nonstopfound 6 days agoSee prices for these dates
22 Oct – 5 Nov$169Bangkok Airwaysout nonstop, back nonstopfound 3 days agoSee prices for these dates
29 Oct – 8 Nov$173Bangkok Airwaysout nonstop, back nonstopfound 2 days agoSee prices for these dates

Every date we hold

9 departure dates

20 Oct – 2 Nov: $207, found 6 days ago22 Oct – 5 Nov: $169, found 3 days ago23 Oct – 18 Nov: $177, found today24 Oct – 8 Nov: $219, found 6 days ago27 Oct – 4 Nov: $163, found 3 days ago28 Oct – 17 Nov: $165, found 6 days ago29 Oct – 8 Nov: $173, found 2 days ago30 Oct – 16 Nov: $165, found 6 days ago31 Oct – 20 Nov: $173, found 3 days agoOct
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
20 Oct – 2 Nov$207Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 6 days agoSee prices for these dates
22 Oct – 5 Nov$169Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 3 days agoSee prices for these dates
23 Oct – 18 Nov$177Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound todaySee prices for these dates
24 Oct – 8 Nov$219Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 6 days agoSee prices for these dates
27 Oct – 4 Nov$163Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 3 days agoSee prices for these dates
28 Oct – 17 Nov$165Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 6 days agoSee prices for these dates
29 Oct – 8 Nov$173Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 2 days agoSee prices for these dates
30 Oct – 16 Nov$165Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 6 days agoSee prices for these dates
31 Oct – 20 Nov$173Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)out nonstop, back nonstopfound 3 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 dates
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 datesEvery date in December 2026
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 20 hours agoSee prices for these dates

One-way

In October 2026, the cheapest one-way fare on each of 3 departure dates is usually $85 to $85. Across all 32 departure dates we hold on this route, it is usually $84 to $85. Of the 6 months with enough one-way fares to compare, 3 are usually cheaper than October 2026.

Cheapest one-way found recently

$84

20 Oct · Bangkok Airways

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

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 October 2026

DatesFromAirlineStopsFound
20 Oct$84Bangkok Airwaysnonstopfound yesterdayOpen this trip
21 Oct$85Bangkok Airwaysstops unknownfound 2 days agoOpen this trip
27 Oct$85Bangkok Airwaysnonstopfound 2 days agoOpen this trip

Every date we hold

3 departure dates

20 Oct: $84, found yesterday21 Oct: $85, found 2 days ago27 Oct: $85, found 2 days agoOct
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
20 Oct$84Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)nonstopfound yesterdayOpen this trip
21 Oct$85Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)stops unknownfound 2 days agoOpen this trip
27 Oct$85Bangkok AirwaysSuvarnabhumi Airport (BKK) → Koh Samui Airport (USM)nonstopfound 2 days agoOpen this trip

Which month looks cheapest?

November 2026 is the cheapest month — from $75.

October 2026From $843 departure dates20 Oct · found yesterdayOpen this trip
November 2026From $75Cheapest seen3 departure dates5 Nov · found 2 hours agoOpen this tripEvery date in November 2026
April 2027From $846 departure dates13 Apr 2027 · found 22 hours agoOpen this tripEvery date in April 2027
May 2027From $816 departure dates2 May 2027 · found 6 days agoOpen this tripEvery date in May 2027
June 2027From $844 departure dates3 Jun 2027 · found 6 days agoOpen this trip
July 2027From $848 departure dates9 Jul 2027 · found 5 days agoOpen this tripEvery date in July 2027
August 2027From $852 departure dates4 Aug 2027 · found 6 days agoOpen this tripEvery date in August 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