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Ulaanbaatar to Bangkok in December 2026 UBN → BKK, DMK

Chinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK), Don Mueang International Airport (DMK)

For departures in December 2026, the cheapest return found recently is $581 with MIAT Mongolian Airlines, 4 Dec – 12 Dec, found yesterday.

Return

In December 2026, the cheapest return fare on each of 25 departure dates is usually $583 to $638. Across all 53 departure dates we hold on this route, it is usually $583 to $652. Of the 4 months with enough return fares to compare, December 2026 is usually the most expensive.

Cheapest return found recently

$581

4 Dec – 12 Dec · MIAT Mongolian Airlines

Chinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)

out 1 stop, back 1 stop

found yesterday

See prices for these datesCheck today's price

Cheapest we hold, of any age

$580

8 Dec – 20 Dec · MIAT Mongolian Airlines

Chinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)

out 1 stop, back 1 stop

found 6 days ago

See prices for these datesCheck today's price

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
8 Dec – 20 Dec$580MIAT Mongolian Airlinesout 1 stop, back 1 stopfound 6 days agoSee prices for these dates
4 Dec – 12 Dec$581MIAT Mongolian Airlinesout 1 stop, back 1 stopfound yesterdaySee prices for these dates
12 Dec – 13 Dec$581MIAT Mongolian Airlinesout 1 stop, back 1 stopfound yesterdaySee prices for these dates
9 Dec – 19 Dec$582MIAT Mongolian Airlinesout 1 stop, back 1 stopfound 6 days agoSee prices for these dates
1 Dec – 13 Dec$583MIAT Mongolian Airlinesout 1 stop, back 1 stopfound yesterdaySee prices for these dates

Every date we hold

25 departure dates

1 Dec – 13 Dec: $583, found yesterday2 Dec – 6 Dec: $621, found 3 days ago3 Dec – 5 Dec: $638, found 3 days ago4 Dec – 12 Dec: $581, found yesterday6 Dec – 8 Dec: $583, found 3 days ago7 Dec – 11 Dec: $588, found 3 days ago8 Dec – 20 Dec: $580, found 6 days ago9 Dec – 19 Dec: $582, found 6 days ago10 Dec – 10 Jan 2027: $593, found 3 days ago11 Dec – 13 Dec: $583, found 3 days ago12 Dec – 13 Dec: $581, found yesterday16 Dec – 18 Dec: $583, found 3 days ago17 Dec – 21 Dec: $583, found 3 days ago18 Dec – 20 Dec: $611, found 3 days ago19 Dec – 23 Dec: $620, found 3 days ago20 Dec – 20 Dec: $785, found 6 days ago21 Dec – 25 Dec: $597, found 3 days ago22 Dec – 24 Dec: $583, found 3 days ago23 Dec – 26 Dec: $609, found 3 days ago24 Dec – 26 Dec: $620, found 3 days ago26 Dec – 28 Dec: $758, found 3 days ago27 Dec – 30 Dec: $653, found 3 days ago28 Dec – 31 Dec: $699, found 3 days ago29 Dec – 17 Jan 2027: $727, found yesterday30 Dec – 15 Jan 2027: $852, 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 – 13 Dec$583MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound yesterdaySee prices for these dates
2 Dec – 6 Dec$621Air ChinaChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 3 days agoSee prices for these dates
3 Dec – 5 Dec$638Korean AirChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 3 days agoSee prices for these dates
4 Dec – 12 Dec$581MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound yesterdaySee prices for these dates
6 Dec – 8 Dec$583MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 3 days agoSee prices for these dates
7 Dec – 11 Dec$588MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 3 days agoSee prices for these dates
8 Dec – 20 Dec$580MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates
9 Dec – 19 Dec$582MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates
10 Dec – 10 Jan 2027$593MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 3 days agoSee prices for these dates
11 Dec – 13 Dec$583MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 3 days agoSee prices for these dates
12 Dec – 13 Dec$581MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound yesterdaySee prices for these dates
16 Dec – 18 Dec$583MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 3 days agoSee prices for these dates
17 Dec – 21 Dec$583MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 3 days agoSee prices for these dates
18 Dec – 20 Dec$611Air ChinaChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 3 days agoSee prices for these dates
19 Dec – 23 Dec$620Air ChinaChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 3 days agoSee prices for these dates
20 Dec – 20 Dec$785Asiana AirlinesChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates
21 Dec – 25 Dec$597Air ChinaChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 3 days agoSee prices for these dates
22 Dec – 24 Dec$583MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 3 days agoSee prices for these dates
23 Dec – 26 Dec$609Air ChinaChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 2 stops, back nonstopfound 3 days agoSee prices for these dates
24 Dec – 26 Dec$620Air ChinaChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 2 stops, back nonstopfound 3 days agoSee prices for these dates
26 Dec – 28 Dec$758Air ChinaChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 2 stops, back nonstopfound 3 days agoSee prices for these dates
27 Dec – 30 Dec$653Air ChinaChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 2 stops, back nonstopfound 3 days agoSee prices for these dates
28 Dec – 31 Dec$699Air ChinaChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 2 stops, back 1 stopfound 3 days agoSee prices for these dates
29 Dec – 17 Jan 2027$727Air ChinaChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound yesterdaySee prices for these dates
30 Dec – 15 Jan 2027$852Air ChinaChinggis Khaan International Airport (UBN) → Suvarnabhumi Airport (BKK)out 2 stops, back 2 stopsfound 6 days agoSee prices for these dates

Which month looks cheapest?

November 2026 is the cheapest month — from $559.

October 2026From $5813 departure dates26 Oct – 8 Nov · found 3 days agoSee prices for these dates
November 2026From $559Cheapest seen9 departure dates25 Nov – 9 Dec · found 5 days agoSee prices for these datesEvery date in November 2026
December 2026From $58025 departure dates8 Dec – 20 Dec · found 6 days agoSee prices for these dates
January 2027From $58113 departure dates13 Jan 2027 – 24 Jan 2027 · found 3 days agoSee prices for these datesEvery date in January 2027
February 2027From $6951 departure date6 Feb 2027 – 14 Feb 2027 · found 2 days agoSee prices for these dates
March 2027From $7011 departure date4 Mar 2027 – 18 Mar 2027 · found 5 days agoSee prices for these dates
April 2027From $6521 departure date9 Apr 2027 – 16 Apr 2027 · found 4 days agoSee prices for these dates

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