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Ulaanbaatar to Hong Kong flights in December 2026 from $220 UBN → HKG

Chinggis Khaan International Airport (UBN) → Hong Kong International Airport (HKG)

For departures in December 2026, the cheapest return found recently is $722 with MIAT Mongolian Airlines, 31 Dec – 12 Jan 2027, found 3 days ago. The cheapest one-way found recently is $220 with Air China, 12 Dec, found 2 days ago.

Return

In December 2026, the cheapest return fare on each of 7 departure dates is usually $400 to $552. Across all 25 departure dates we hold on this route, it is usually $403 to $522. Of the 5 months with enough return fares to compare, December 2026 is usually the cheapest.

Cheapest return found recently

$722

31 Dec – 12 Jan 2027 · MIAT Mongolian Airlines

Chinggis Khaan International Airport (UBN) → Hong Kong International Airport (HKG)

out nonstop, back nonstop

found 3 days ago

See prices for these datesCheck today's price

Cheapest we hold, of any age

$394

1 Dec – 12 Dec · Air China

Chinggis Khaan International Airport (UBN) → Hong Kong International Airport (HKG)

out 1 stop, back 1 stop

found 4 days ago

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
1 Dec – 12 Dec$394Air Chinaout 1 stop, back 1 stopfound 4 days agoSee prices for these dates
2 Dec – 8 Dec$397Air Chinaout 1 stop, back 1 stopfound 5 days agoSee prices for these dates
16 Dec – 30 Dec$403Air Chinaout 1 stop, back 1 stopfound 8 days agoSee prices for these dates
17 Dec – 31 Dec$403Air Chinaout 1 stop, back 1 stopfound 8 days agoSee prices for these dates
22 Dec – 31 Dec$403Air Chinaout 1 stop, back 1 stopfound 8 days agoSee prices for these dates

Every date we hold

7 departure dates

1 Dec – 12 Dec: $394, found 4 days ago2 Dec – 8 Dec: $397, found 5 days ago16 Dec – 30 Dec: $403, found 8 days ago17 Dec – 31 Dec: $403, found 8 days ago22 Dec – 31 Dec: $403, found 8 days ago23 Dec – 8 Jan 2027: $700, found 4 days ago31 Dec – 12 Jan 2027: $722, 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 – 12 Dec$394Air ChinaChinggis Khaan International Airport (UBN) → Hong Kong International Airport (HKG)out 1 stop, back 1 stopfound 4 days agoSee prices for these dates
2 Dec – 8 Dec$397Air ChinaChinggis Khaan International Airport (UBN) → Hong Kong International Airport (HKG)out 1 stop, back 1 stopfound 5 days agoSee prices for these dates
16 Dec – 30 Dec$403Air ChinaChinggis Khaan International Airport (UBN) → Hong Kong International Airport (HKG)out 1 stop, back 1 stopfound 8 days agoSee prices for these dates
17 Dec – 31 Dec$403Air ChinaChinggis Khaan International Airport (UBN) → Hong Kong International Airport (HKG)out 1 stop, back 1 stopfound 8 days agoSee prices for these dates
22 Dec – 31 Dec$403Air ChinaChinggis Khaan International Airport (UBN) → Hong Kong International Airport (HKG)out 1 stop, back 1 stopfound 8 days agoSee prices for these dates
23 Dec – 8 Jan 2027$700MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Hong Kong International Airport (HKG)out nonstop, back nonstopfound 4 days agoSee prices for these dates
31 Dec – 12 Jan 2027$722MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Hong Kong International Airport (HKG)out nonstop, back nonstopfound 3 days agoSee prices for these dates

Which month looks cheapest?

November 2026 is the cheapest month — from $376.

November 2026From $376Cheapest seen4 departure dates18 Nov – 22 Nov · found 6 days agoSee prices for these dates
December 2026From $3947 departure dates1 Dec – 12 Dec · found 4 days agoSee prices for these dates
January 2027From $6221 departure date11 Jan 2027 – 24 Jan 2027 · found 2 days agoSee prices for these dates
February 2027From $5452 departure dates28 Feb 2027 – 5 Mar 2027 · found 6 days agoSee prices for these dates
March 2027From $5193 departure dates3 Mar 2027 – 9 Mar 2027 · found 6 days agoSee prices for these dates
April 2027From $5203 departure dates28 Apr 2027 – 4 May 2027 · found 2 days agoSee prices for these dates
May 2027From $4775 departure dates2 May 2027 – 7 May 2027 · found 4 days agoSee prices for these dates

One-way

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

Cheapest one-way found recently

$220

12 Dec · Air China

Chinggis Khaan International Airport (UBN) → Hong Kong International Airport (HKG)

1 stop

found 2 days ago

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Cheapest we hold, of any age

$218

1 Dec · Air China

Chinggis Khaan International Airport (UBN) → Hong Kong International Airport (HKG)

stops unknown

found 5 days ago

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
1 Dec$218Air Chinastops unknownfound 5 days agoOpen this trip
12 Dec$220Air China1 stopfound 2 days agoOpen this trip

Every date we hold

2 departure dates

1 Dec: $218, found 5 days ago12 Dec: $220, 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$218Air ChinaChinggis Khaan International Airport (UBN) → Hong Kong International Airport (HKG)stops unknownfound 5 days agoOpen this trip
12 Dec$220Air ChinaChinggis Khaan International Airport (UBN) → Hong Kong International Airport (HKG)1 stopfound 2 days agoOpen this trip

Which month looks cheapest?

December 2026 is the cheapest month — from $218.

December 2026From $218Cheapest seen2 departure dates1 Dec · found 5 days agoOpen this trip
January 2027From $2901 departure date29 Jan 2027 · found 4 days agoOpen this trip
March 2027From $2321 departure date1 Mar 2027 · found 7 days agoOpen this trip
May 2027From $2851 departure date10 May 2027 · found 6 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