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Phnom Penh to Bangkok flights in December 2026 from $84 KTI → BKK, DMK

Techo International (KTI) → Suvarnabhumi Airport (BKK), Don Mueang International Airport (DMK)

For departures in December 2026, the cheapest return found recently is $163 with Thai Vietjet Air, 7 Dec – 19 Dec, found 2 days ago. The cheapest one-way found recently is $84 with Thai Vietjet Air, 1 Dec, found 2 days ago.

Return

In December 2026, the cheapest return fare on each of 4 departure dates is usually $172 to $177. Across all 9 departure dates we hold on this route, it is usually $167 to $175.

Cheapest return found recently

$163

7 Dec – 19 Dec · Thai Vietjet Air

Techo International (KTI) → Suvarnabhumi Airport (BKK)

out nonstop, back nonstop

found 2 days ago

See prices for these datesCheck today's price

It is also the cheapest return we hold, of any age.

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
7 Dec – 19 Dec$163Thai Vietjet Airout nonstop, back nonstopfound 2 days agoSee prices for these dates
1 Dec – 5 Jan 2027$175Thai Vietjet Airout nonstop, back nonstopfound 4 days agoSee prices for these dates
4 Dec – 5 Dec$175Thai Vietjet Airout nonstop, back nonstopfound 7 days agoSee prices for these dates
23 Dec – 22 Jan 2027$182Thai AirAsiaout nonstop, back nonstopfound 3 days agoSee prices for these dates

Every date we hold

4 departure dates

1 Dec – 5 Jan 2027: $175, found 4 days ago4 Dec – 5 Dec: $175, found 7 days ago7 Dec – 19 Dec: $163, found 2 days ago23 Dec – 22 Jan 2027: $182, found 3 days agoDec
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
1 Dec – 5 Jan 2027$175Thai Vietjet AirTecho International (KTI) → Suvarnabhumi Airport (BKK)out nonstop, back nonstopfound 4 days agoSee prices for these dates
4 Dec – 5 Dec$175Thai Vietjet AirTecho International (KTI) → Suvarnabhumi Airport (BKK)out nonstop, back nonstopfound 7 days agoSee prices for these dates
7 Dec – 19 Dec$163Thai Vietjet AirTecho International (KTI) → Suvarnabhumi Airport (BKK)out nonstop, back nonstopfound 2 days agoSee prices for these dates
23 Dec – 22 Jan 2027$182Thai AirAsiaTecho International (KTI) → Don Mueang International Airport (DMK)out nonstop, back nonstopfound 3 days agoSee prices for these dates

Which month looks cheapest?

December 2026 is the cheapest month — from $163.

November 2026From $1692 departure dates29 Nov – 30 Nov · found 2 days agoSee prices for these datesEvery date in November 2026
December 2026From $163Cheapest seen4 departure dates7 Dec – 19 Dec · found 2 days agoSee prices for these dates
January 2027From $1701 departure date23 Jan 2027 – 8 Feb 2027 · found 7 days agoSee prices for these datesEvery date in January 2027
February 2027From $1662 departure dates16 Feb 2027 – 19 Feb 2027 · found 6 days agoSee prices for these datesEvery date in February 2027

One-way

In December 2026, the cheapest one-way fare on each of 14 departure dates is usually $89 to $99. Across all 63 departure dates we hold on this route, it is usually $89 to $98. Of the 5 months with enough one-way fares to compare, 3 are usually cheaper than December 2026.

Cheapest one-way found recently

$84

1 Dec · Thai Vietjet Air

Techo International (KTI) → Suvarnabhumi Airport (BKK)

nonstop

found 2 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
1 Dec$84Thai Vietjet Airnonstopfound 2 days agoOpen this trip
15 Dec$88Thai Vietjet Airnonstopfound 3 days agoOpen this trip
2 Dec$89Thai Vietjet Airnonstopfound 3 days agoOpen this trip
5 Dec$89Thai Vietjet Airnonstopfound 3 days agoOpen this trip
13 Dec$90Thai AirAsianonstopfound 7 days agoOpen this trip

Every date we hold

14 departure dates

1 Dec: $84, found 2 days ago2 Dec: $89, found 3 days ago3 Dec: $95, found 4 days ago5 Dec: $89, found 3 days ago6 Dec: $94, found 3 days ago8 Dec: $100, found 2 days ago9 Dec: $97, found 6 days ago11 Dec: $100, found 7 days ago12 Dec: $94, found 7 days ago13 Dec: $90, found 7 days ago14 Dec: $94, found 7 days ago15 Dec: $88, found 3 days ago26 Dec: $103, found 2 days ago29 Dec: $104, 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$84Thai Vietjet AirTecho International (KTI) → Suvarnabhumi Airport (BKK)nonstopfound 2 days agoOpen this trip
2 Dec$89Thai Vietjet AirTecho International (KTI) → Suvarnabhumi Airport (BKK)nonstopfound 3 days agoOpen this trip
3 Dec$95Thai Vietjet AirTecho International (KTI) → Suvarnabhumi Airport (BKK)nonstopfound 4 days agoOpen this trip
5 Dec$89Thai Vietjet AirTecho International (KTI) → Suvarnabhumi Airport (BKK)nonstopfound 3 days agoOpen this trip
6 Dec$94Thai Vietjet AirTecho International (KTI) → Suvarnabhumi Airport (BKK)nonstopfound 3 days agoOpen this trip
8 Dec$100Thai AirAsiaTecho International (KTI) → Don Mueang International Airport (DMK)nonstopfound 2 days agoOpen this trip
9 Dec$97Thai AirAsiaTecho International (KTI) → Don Mueang International Airport (DMK)nonstopfound 6 days agoOpen this trip
11 Dec$100Thai AirAsiaTecho International (KTI) → Don Mueang International Airport (DMK)nonstopfound 7 days agoOpen this trip
12 Dec$94Thai Vietjet AirTecho International (KTI) → Suvarnabhumi Airport (BKK)nonstopfound 7 days agoOpen this trip
13 Dec$90Thai AirAsiaTecho International (KTI) → Don Mueang International Airport (DMK)nonstopfound 7 days agoOpen this trip
14 Dec$94Thai Vietjet AirTecho International (KTI) → Suvarnabhumi Airport (BKK)nonstopfound 7 days agoOpen this trip
15 Dec$88Thai Vietjet AirTecho International (KTI) → Suvarnabhumi Airport (BKK)nonstopfound 3 days agoOpen this trip
26 Dec$103Thai AirAsiaTecho International (KTI) → Don Mueang International Airport (DMK)nonstopfound 2 days agoOpen this trip
29 Dec$104Thai AirAsiaTecho International (KTI) → Don Mueang International Airport (DMK)nonstopfound 6 days agoOpen this trip

Which month looks cheapest?

March 2027 is the cheapest month — from $73.

November 2026From $7517 departure dates24 Nov · found 6 days agoOpen this tripEvery date in November 2026
December 2026From $8414 departure dates1 Dec · found 2 days agoOpen this trip
January 2027From $8113 departure dates9 Jan 2027 · found 2 days agoOpen this tripEvery date in January 2027
February 2027From $769 departure dates18 Feb 2027 · found 4 days agoOpen this tripEvery date in February 2027
March 2027From $73Cheapest seen8 departure dates16 Mar 2027 · found 2 days agoOpen this tripEvery date in March 2027
April 2027From $942 departure dates20 Apr 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