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Bangkok to Siem Reap flights in December 2026 from $83 BKK, DMK → SAI

Suvarnabhumi Airport (BKK), Don Mueang International Airport (DMK) → Siem Reap International Airport (SAI)

For departures in December 2026, the cheapest return found recently is $249 with Air Cambodia, 31 Dec – 17 Jan 2027, found 2 days ago. The cheapest one-way found recently is $83 with Air Cambodia, 29 Dec, found 7 days ago.

Return

In December 2026, the cheapest return fare on each of 12 departure dates is usually $228 to $265. Across all 57 departure dates we hold on this route, it is usually $174 to $228. Of the 6 months with enough return fares to compare, 4 are usually cheaper than December 2026.

Cheapest return found recently

$249

31 Dec – 17 Jan 2027 · Air Cambodia

Suvarnabhumi Airport (BKK) → Siem Reap International Airport (SAI)

out nonstop, back nonstop

found 2 days ago

See prices for these datesCheck today's price

Cheapest we hold, of any age

$158

29 Dec – 29 Dec · Air Cambodia

Suvarnabhumi Airport (BKK) → Siem Reap International Airport (SAI)

out nonstop, back nonstop

found 8 days ago

See prices for these datesCheck today's price

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
29 Dec – 29 Dec$158Air Cambodiaout nonstop, back nonstopfound 8 days agoSee prices for these dates
24 Dec – 26 Dec$223Emiratesout nonstop, back nonstopfound 8 days agoSee prices for these dates
3 Dec – 17 Dec$228THAI Airwaysout nonstop, back nonstopfound 7 days agoSee prices for these dates
9 Dec – 18 Dec$228THAI Airwaysout nonstop, back nonstopfound 4 days agoSee prices for these dates
15 Dec – 16 Dec$229THAI Airwaysout nonstop, back nonstopfound 4 days agoSee prices for these dates

Every date we hold

12 departure dates

1 Dec – 17 Dec: $232, found 4 days ago3 Dec – 17 Dec: $228, found 7 days ago6 Dec – 7 Dec: $280, found 6 days ago7 Dec – 8 Dec: $238, found 4 days ago9 Dec – 18 Dec: $228, found 4 days ago10 Dec – 18 Dec: $263, found 4 days ago12 Dec – 3 Jan 2027: $272, found 2 days ago15 Dec – 16 Dec: $229, found 4 days ago21 Dec – 27 Dec: $292, found 4 days ago24 Dec – 26 Dec: $223, found 8 days ago29 Dec – 29 Dec: $158, found 8 days ago31 Dec – 17 Jan 2027: $249, found 2 days agoDec
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
1 Dec – 17 Dec$232THAI AirwaysSuvarnabhumi Airport (BKK) → Siem Reap International Airport (SAI)out nonstop, back nonstopfound 4 days agoSee prices for these dates
3 Dec – 17 Dec$228THAI AirwaysSuvarnabhumi Airport (BKK) → Siem Reap International Airport (SAI)out nonstop, back nonstopfound 7 days agoSee prices for these dates
6 Dec – 7 Dec$280Thai AirAsiaDon Mueang International Airport (DMK) → Siem Reap International Airport (SAI)out nonstop, back nonstopfound 6 days agoSee prices for these dates
7 Dec – 8 Dec$238Thai AirAsiaDon Mueang International Airport (DMK) → Siem Reap International Airport (SAI)out nonstop, back nonstopfound 4 days agoSee prices for these dates
9 Dec – 18 Dec$228THAI AirwaysSuvarnabhumi Airport (BKK) → Siem Reap International Airport (SAI)out nonstop, back nonstopfound 4 days agoSee prices for these dates
10 Dec – 18 Dec$263Thai AirAsiaDon Mueang International Airport (DMK) → Siem Reap International Airport (SAI)out nonstop, back nonstopfound 4 days agoSee prices for these dates
12 Dec – 3 Jan 2027$272Thai AirAsiaDon Mueang International Airport (DMK) → Siem Reap International Airport (SAI)out nonstop, back nonstopfound 2 days agoSee prices for these dates
15 Dec – 16 Dec$229THAI AirwaysSuvarnabhumi Airport (BKK) → Siem Reap International Airport (SAI)out nonstop, back nonstopfound 4 days agoSee prices for these dates
21 Dec – 27 Dec$292Thai AirAsiaDon Mueang International Airport (DMK) → Siem Reap International Airport (SAI)out nonstop, back nonstopfound 4 days agoSee prices for these dates
24 Dec – 26 Dec$223EmiratesSuvarnabhumi Airport (BKK) → Siem Reap International Airport (SAI)out nonstop, back nonstopfound 8 days agoSee prices for these dates
29 Dec – 29 Dec$158Air CambodiaSuvarnabhumi Airport (BKK) → Siem Reap International Airport (SAI)out nonstop, back nonstopfound 8 days agoSee prices for these dates
31 Dec – 17 Jan 2027$249Air CambodiaSuvarnabhumi Airport (BKK) → Siem Reap International Airport (SAI)out nonstop, back nonstopfound 2 days agoSee prices for these dates

Which month looks cheapest?

January 2027 is the cheapest month — from $146.

November 2026From $2081 departure date22 Nov – 27 Nov · found 6 days agoSee prices for these dates
December 2026From $15812 departure dates29 Dec – 29 Dec · found 8 days agoSee prices for these dates
January 2027From $146Cheapest seen14 departure dates12 Jan 2027 – 23 Jan 2027 · found 5 days agoSee prices for these datesEvery date in January 2027
February 2027From $15813 departure dates20 Feb 2027 – 9 Mar 2027 · found 3 days agoSee prices for these datesEvery date in February 2027
March 2027From $1598 departure dates1 Mar 2027 – 9 Mar 2027 · found 2 days agoSee prices for these datesEvery date in March 2027
April 2027From $1974 departure dates7 Apr 2027 – 21 Apr 2027 · found 4 days agoSee prices for these dates
July 2027From $1973 departure dates15 Jul 2027 – 12 Aug 2027 · found 5 days agoSee prices for these dates
August 2027From $1971 departure date20 Aug 2027 – 24 Aug 2027 · found 5 days agoSee prices for these dates
September 2027From $2021 departure date12 Sept 2027 – 16 Sept 2027 · found 2 days agoSee prices for these dates

One-way

We hold one-way fares on only 1 departure date in December 2026, too few to say what one usually costs.

Cheapest one-way found recently

$83

29 Dec · Air Cambodia

Suvarnabhumi Airport (BKK) → Siem Reap International Airport (SAI)

stops unknown

found 7 days ago

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
29 Dec$83Air Cambodiastops unknownfound 7 days agoOpen this trip

Every date we hold

1 departure date

See every date as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
29 Dec$83Air CambodiaSuvarnabhumi Airport (BKK) → Siem Reap International Airport (SAI)stops unknownfound 7 days agoOpen this trip

Which month looks cheapest?

February 2027 is the cheapest month — from $83.

December 2026From $831 departure date29 Dec · found 7 days agoOpen this trip
January 2027From $831 departure date5 Jan 2027 · found 8 days agoSee prices for these datesEvery date in January 2027
February 2027From $83Cheapest seen1 departure date13 Feb 2027 · found 3 days agoOpen this tripEvery date in February 2027
July 2027From $941 departure date15 Jul 2027 · found 5 days agoOpen this trip
August 2027From $942 departure dates20 Aug 2027 · found 7 days agoOpen this trip
September 2027From $1311 departure date30 Sept 2027 · found 3 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