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Sihanoukville to Siem Reap flights in December 2026 from $108 KOS → SAI

Sihanouk International Airport (KOS) → Siem Reap International Airport (SAI)

For departures in December 2026, the cheapest return found recently is $292 with Air Cambodia, 11 Dec – 19 Dec, found 4 days ago. The cheapest one-way found recently is $108 with Air Cambodia, 23 Dec, found 4 days ago.

Return

We hold return fares on only 2 departure dates in December 2026, too few to say what one usually costs.

Cheapest return found recently

$292

11 Dec – 19 Dec · Air Cambodia

Sihanouk International Airport (KOS) → Siem Reap International Airport (SAI)

out nonstop, back nonstop

found 4 days ago

See prices for these datesCheck today's price

Cheapest we hold, of any age

$238

23 Dec – 27 Dec · Air Cambodia

Sihanouk International Airport (KOS) → Siem Reap International Airport (SAI)

out nonstop, back nonstop

found 5 days ago

See prices for these datesCheck today's price

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
23 Dec – 27 Dec$238Air Cambodiaout nonstop, back nonstopfound 5 days agoSee prices for these dates
11 Dec – 19 Dec$292Air Cambodiaout nonstop, back nonstopfound 4 days agoSee prices for these dates

Every date we hold

2 departure dates

11 Dec – 19 Dec: $292, found 4 days ago23 Dec – 27 Dec: $238, found 5 days agoDec
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
11 Dec – 19 Dec$292Air CambodiaSihanouk International Airport (KOS) → Siem Reap International Airport (SAI)out nonstop, back nonstopfound 4 days agoSee prices for these dates
23 Dec – 27 Dec$238Air CambodiaSihanouk International Airport (KOS) → Siem Reap International Airport (SAI)out nonstop, back nonstopfound 5 days agoSee prices for these dates

Which month looks cheapest?

December 2026 is the cheapest month — from $238.

December 2026From $238Cheapest seen2 departure dates23 Dec – 27 Dec · found 5 days agoSee prices for these dates
January 2027From $3471 departure date6 Jan 2027 – 9 Jan 2027 · found 6 days agoSee prices for these datesEvery date in January 2027

One-way

In December 2026, the cheapest one-way fare on each of 12 departure dates is usually $120 to $131. Across all 28 departure dates we hold on this route, it is usually $120 to $133. Of the 4 months with enough one-way fares to compare, 2 are usually cheaper than December 2026.

Cheapest one-way found recently

$108

23 Dec · Air Cambodia

Sihanouk International Airport (KOS) → Siem Reap International Airport (SAI)

nonstop

found 4 days ago

Open this tripCheck today's price

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

FareTell may earn a commission when you book through a partner.

The cheapest dates in December 2026

DatesFromAirlineStopsFound
23 Dec$108Air Cambodianonstopfound 4 days agoOpen this trip
19 Dec$119Air Cambodianonstopfound 5 days agoOpen this trip
27 Dec$119Air Cambodianonstopfound 5 days agoOpen this trip
28 Dec$120Air Cambodianonstopfound 5 days agoOpen this trip
30 Dec$120Air Cambodianonstopfound 5 days agoOpen this trip

Every date we hold

12 departure dates

4 Dec: $131, found 5 days ago16 Dec: $131, found 5 days ago18 Dec: $132, found 5 days ago19 Dec: $119, found 5 days ago20 Dec: $131, found 5 days ago22 Dec: $131, found 5 days ago23 Dec: $108, found 4 days ago26 Dec: $138, found 7 days ago27 Dec: $119, found 5 days ago28 Dec: $120, found 5 days ago30 Dec: $120, found 5 days ago31 Dec: $131, found 5 days agoDec
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
4 Dec$131Air CambodiaSihanouk International Airport (KOS) → Siem Reap International Airport (SAI)nonstopfound 5 days agoOpen this trip
16 Dec$131Air CambodiaSihanouk International Airport (KOS) → Siem Reap International Airport (SAI)nonstopfound 5 days agoOpen this trip
18 Dec$132Air CambodiaSihanouk International Airport (KOS) → Siem Reap International Airport (SAI)nonstopfound 5 days agoOpen this trip
19 Dec$119Air CambodiaSihanouk International Airport (KOS) → Siem Reap International Airport (SAI)nonstopfound 5 days agoOpen this trip
20 Dec$131Air CambodiaSihanouk International Airport (KOS) → Siem Reap International Airport (SAI)nonstopfound 5 days agoOpen this trip
22 Dec$131Air CambodiaSihanouk International Airport (KOS) → Siem Reap International Airport (SAI)nonstopfound 5 days agoOpen this trip
23 Dec$108Air CambodiaSihanouk International Airport (KOS) → Siem Reap International Airport (SAI)nonstopfound 4 days agoOpen this trip
26 Dec$138Air CambodiaSihanouk International Airport (KOS) → Siem Reap International Airport (SAI)nonstopfound 7 days agoOpen this trip
27 Dec$119Air CambodiaSihanouk International Airport (KOS) → Siem Reap International Airport (SAI)nonstopfound 5 days agoOpen this trip
28 Dec$120Air CambodiaSihanouk International Airport (KOS) → Siem Reap International Airport (SAI)nonstopfound 5 days agoOpen this trip
30 Dec$120Air CambodiaSihanouk International Airport (KOS) → Siem Reap International Airport (SAI)nonstopfound 5 days agoOpen this trip
31 Dec$131Air CambodiaSihanouk International Airport (KOS) → Siem Reap International Airport (SAI)nonstopfound 5 days agoOpen this trip

Which month looks cheapest?

November 2026 is the cheapest month — from $106.

November 2026From $106Cheapest seen4 departure dates16 Nov · found 3 days agoOpen this trip
December 2026From $10812 departure dates23 Dec · found 4 days agoOpen this trip
January 2027From $1137 departure dates6 Jan 2027 · found 5 days agoOpen this tripEvery date in January 2027
February 2027From $1194 departure dates18 Feb 2027 · found 3 days agoOpen this trip
April 2027From $1561 departure date7 Apr 2027 · found 2 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