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Ulaanbaatar to Beijing flights in December 2026 from $158 UBN → PEK, PKX

Chinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK), Beijing Daxing International Airport (PKX)

For departures in December 2026, the cheapest return found recently is $274 with MIAT Mongolian Airlines, 5 Dec – 6 Dec, found 2 days ago. The cheapest one-way found recently is $158 with Air China, 7 Dec, found 2 days ago.

Return

In December 2026, the cheapest return fare on each of 13 departure dates is usually $272 to $359. Across all 59 departure dates we hold on this route, it is usually $261 to $331. Of the 7 months with enough return fares to compare, 4 are usually cheaper than December 2026.

Cheapest return found recently

$274

5 Dec – 6 Dec · MIAT Mongolian Airlines

Chinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)

out nonstop, back nonstop

found 2 days ago

See prices for these datesCheck today's price

Cheapest we hold, of any age

$260

1 Dec – 7 Dec · MIAT Mongolian Airlines

Chinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)

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
1 Dec – 7 Dec$260MIAT Mongolian Airlinesout nonstop, back nonstopfound 5 days agoSee prices for these dates
12 Dec – 25 Dec$260MIAT Mongolian Airlinesout nonstop, back nonstopfound 5 days agoSee prices for these dates
2 Dec – 14 Dec$271Air Chinaout nonstop, back nonstopfound 5 days agoSee prices for these dates
7 Dec – 17 Dec$272Air Chinaout nonstop, back nonstopfound 8 days agoSee prices for these dates
5 Dec – 6 Dec$274MIAT Mongolian Airlinesout nonstop, back nonstopfound 2 days agoSee prices for these dates

Every date we hold

13 departure dates

1 Dec – 7 Dec: $260, found 5 days ago2 Dec – 14 Dec: $271, found 5 days ago5 Dec – 6 Dec: $274, found 2 days ago7 Dec – 17 Dec: $272, found 8 days ago12 Dec – 25 Dec: $260, found 5 days ago17 Dec – 10 Jan 2027: $428, found 2 days ago18 Dec – 29 Dec: $279, found 4 days ago22 Dec – 29 Dec: $287, found 5 days ago24 Dec – 25 Dec: $347, found 3 days ago28 Dec – 4 Jan 2027: $314, found 5 days ago29 Dec – 4 Jan 2027: $359, found 3 days ago30 Dec – 5 Jan 2027: $379, found 3 days ago31 Dec – 6 Jan 2027: $359, 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 – 7 Dec$260MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)out nonstop, back nonstopfound 5 days agoSee prices for these dates
2 Dec – 14 Dec$271Air ChinaChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)out nonstop, back nonstopfound 5 days agoSee prices for these dates
5 Dec – 6 Dec$274MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)out nonstop, back nonstopfound 2 days agoSee prices for these dates
7 Dec – 17 Dec$272Air ChinaChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)out nonstop, back nonstopfound 8 days agoSee prices for these dates
12 Dec – 25 Dec$260MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)out nonstop, back nonstopfound 5 days agoSee prices for these dates
17 Dec – 10 Jan 2027$428MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)out nonstop, back nonstopfound 2 days agoSee prices for these dates
18 Dec – 29 Dec$279MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)out nonstop, back nonstopfound 4 days agoSee prices for these dates
22 Dec – 29 Dec$287Air ChinaChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)out nonstop, back nonstopfound 5 days agoSee prices for these dates
24 Dec – 25 Dec$347MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)out nonstop, back nonstopfound 3 days agoSee prices for these dates
28 Dec – 4 Jan 2027$314Air ChinaChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)out nonstop, back nonstopfound 5 days agoSee prices for these dates
29 Dec – 4 Jan 2027$359MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)out nonstop, back nonstopfound 3 days agoSee prices for these dates
30 Dec – 5 Jan 2027$379MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)out nonstop, back nonstopfound 3 days agoSee prices for these dates
31 Dec – 6 Jan 2027$359MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)out nonstop, back nonstopfound 3 days agoSee prices for these dates

Which month looks cheapest?

November 2026 is the cheapest month — from $255.

November 2026From $255Cheapest seen9 departure dates23 Nov – 28 Nov · found 2 days agoSee prices for these datesEvery date in November 2026
December 2026From $26013 departure dates1 Dec – 7 Dec · found 5 days agoSee prices for these dates
January 2027From $2759 departure dates30 Jan 2027 – 6 Feb 2027 · found 4 days agoSee prices for these datesEvery date in January 2027
February 2027From $2611 departure date26 Feb 2027 – 12 Mar 2027 · found 7 days agoSee prices for these datesEvery date in February 2027
March 2027From $2579 departure dates9 Mar 2027 – 26 Mar 2027 · found 2 days agoSee prices for these datesEvery date in March 2027
April 2027From $2586 departure dates1 Apr 2027 – 7 Apr 2027 · found 2 days agoSee prices for these dates
May 2027From $2613 departure dates2 May 2027 – 4 May 2027 · found 5 days agoSee prices for these dates
June 2027From $2632 departure dates12 Jun 2027 – 23 Jun 2027 · found 3 days agoSee prices for these dates
July 2027From $2611 departure date15 Jul 2027 – 22 Jul 2027 · found 7 days agoSee prices for these dates
August 2027From $2612 departure dates2 Aug 2027 – 27 Aug 2027 · found 6 days agoSee prices for these dates
October 2027From $2644 departure dates21 Oct 2027 – 28 Oct 2027 · found 7 days agoSee prices for these dates

One-way

In December 2026, the cheapest one-way fare on each of 10 departure dates is usually $152 to $159. Across all 47 departure dates we hold on this route, it is usually $154 to $158. Of the 5 months with enough one-way fares to compare, December 2026 is usually the cheapest.

Cheapest one-way found recently

$158

7 Dec · Air China

Chinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)

nonstop

found 2 days ago

Open this tripCheck today's price

Cheapest we hold, of any age

$148

1 Dec · MIAT Mongolian Airlines

Chinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)

nonstop

found 8 days ago

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
1 Dec$148MIAT Mongolian Airlinesnonstopfound 8 days agoSee prices for these dates
13 Dec$148MIAT Mongolian Airlinesnonstopfound 3 days agoOpen this trip
8 Dec$151MIAT Mongolian Airlinesnonstopfound 4 days agoOpen this trip
2 Dec$154MIAT Mongolian Airlinesnonstopfound 3 days agoOpen this trip
4 Dec$154MIAT Mongolian Airlinesnonstopfound 5 days agoOpen this trip

Every date we hold

10 departure dates

1 Dec: $148, found 8 days ago2 Dec: $154, found 3 days ago4 Dec: $154, found 5 days ago6 Dec: $159, found 7 days ago7 Dec: $158, found 2 days ago8 Dec: $151, found 4 days ago10 Dec: $168, found 3 days ago11 Dec: $154, found 6 days ago13 Dec: $148, found 3 days ago16 Dec: $200, 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$148MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)nonstopfound 8 days agoSee prices for these dates
2 Dec$154MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)nonstopfound 3 days agoOpen this trip
4 Dec$154MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)nonstopfound 5 days agoOpen this trip
6 Dec$159Air ChinaChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)nonstopfound 7 days agoOpen this trip
7 Dec$158Air ChinaChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)nonstopfound 2 days agoOpen this trip
8 Dec$151MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)nonstopfound 4 days agoOpen this trip
10 Dec$168MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)nonstopfound 3 days agoOpen this trip
11 Dec$154MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)nonstopfound 6 days agoOpen this trip
13 Dec$148MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)nonstopfound 3 days agoOpen this trip
16 Dec$200Air ChinaChinggis Khaan International Airport (UBN) → Beijing Capital International Airport (PEK)nonstopfound 3 days agoOpen this trip

Which month looks cheapest?

November 2026 is the cheapest month — from $132.

November 2026From $132Cheapest seen9 departure dates13 Nov · found 2 days agoOpen this tripEvery date in November 2026
December 2026From $14810 departure dates1 Dec · found 8 days agoSee prices for these dates
January 2027From $1538 departure dates16 Jan 2027 · found 2 days agoOpen this tripEvery date in January 2027
February 2027From $1549 departure dates3 Feb 2027 · found 2 days agoOpen this tripEvery date in February 2027
March 2027From $1542 departure dates21 Mar 2027 · found 2 days agoOpen this tripEvery date in March 2027
April 2027From $1532 departure dates19 Apr 2027 · found 2 days agoOpen this trip
May 2027From $1441 departure date3 May 2027 · found 8 days agoSee prices for these dates
June 2027From $1545 departure dates3 Jun 2027 · found 2 days agoOpen this trip
July 2027From $1551 departure date17 Jul 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