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Ulaanbaatar to Seoul flights in January 2027 from $161 UBN → GMP, ICN

Chinggis Khaan International Airport (UBN) → Gimpo International Airport (GMP), Incheon International Airport (ICN)

For departures in January 2027, the cheapest return found recently is $350 with Jeju Air, 17 Jan 2027 – 21 Jan 2027, found 2 days ago. The cheapest one-way found recently is $161 with Jeju Air, 12 Jan 2027, found 2 days ago.

Return

In January 2027, the cheapest return fare on each of 14 departure dates is usually $360 to $453. Across all 89 departure dates we hold on this route, it is usually $378 to $416. Of the 11 months with enough return fares to compare, 8 are usually cheaper than January 2027.

Cheapest return found recently

$350

17 Jan 2027 – 21 Jan 2027 · Jeju Air

Chinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)

out nonstop, back nonstop

found 2 days ago

See prices for these datesCheck today's price

Cheapest we hold, of any age

$342

24 Jan 2027 – 22 Feb 2027 · Asiana Airlines

Chinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)

out nonstop, back nonstop

found 8 days ago

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The cheapest dates in January 2027

DatesFromAirlineStopsFound
24 Jan 2027 – 22 Feb 2027$342Asiana Airlinesout nonstop, back nonstopfound 8 days agoSee prices for these dates
31 Jan 2027 – 22 Feb 2027$342Asiana Airlinesout nonstop, back nonstopfound 8 days agoSee prices for these dates
17 Jan 2027 – 21 Jan 2027$350Jeju Airout nonstop, back nonstopfound 2 days agoSee prices for these dates
19 Jan 2027 – 24 Jan 2027$350Jeju Airout nonstop, back nonstopfound 5 days agoSee prices for these dates
14 Jan 2027 – 28 Jan 2027$388Aero Mongoliaout nonstop, back nonstopfound 6 days agoSee prices for these dates

Every date we hold

14 departure dates

1 Jan 2027 – 4 Jan 2027: $454, found 2 days ago2 Jan 2027 – 11 Jan 2027: $451, found 7 days ago3 Jan 2027 – 29 Jan 2027: $522, found 6 days ago4 Jan 2027 – 21 Jan 2027: $427, found 3 days ago5 Jan 2027 – 22 Jan 2027: $497, found 3 days ago10 Jan 2027 – 14 Jan 2027: $425, found 2 days ago12 Jan 2027 – 19 Jan 2027: $397, found 2 days ago14 Jan 2027 – 28 Jan 2027: $388, found 6 days ago17 Jan 2027 – 21 Jan 2027: $350, found 2 days ago19 Jan 2027 – 24 Jan 2027: $350, found 5 days ago20 Jan 2027 – 27 Jan 2027: $409, found 3 days ago24 Jan 2027 – 22 Feb 2027: $342, found 8 days ago26 Jan 2027 – 29 Jan 2027: $476, found 7 days ago31 Jan 2027 – 22 Feb 2027: $342, found 8 days agoJan
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
1 Jan 2027 – 4 Jan 2027$454MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 2 days agoSee prices for these dates
2 Jan 2027 – 11 Jan 2027$451Aero MongoliaChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 7 days agoSee prices for these dates
3 Jan 2027 – 29 Jan 2027$522MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 6 days agoSee prices for these dates
4 Jan 2027 – 21 Jan 2027$427Aero MongoliaChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 3 days agoSee prices for these dates
5 Jan 2027 – 22 Jan 2027$497Air ChinaChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out 1 stop, back 1 stopfound 3 days agoSee prices for these dates
10 Jan 2027 – 14 Jan 2027$425Asiana AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 2 days agoSee prices for these dates
12 Jan 2027 – 19 Jan 2027$397Jeju AirChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 2 days agoSee prices for these dates
14 Jan 2027 – 28 Jan 2027$388Aero MongoliaChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 6 days agoSee prices for these dates
17 Jan 2027 – 21 Jan 2027$350Jeju AirChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 2 days agoSee prices for these dates
19 Jan 2027 – 24 Jan 2027$350Jeju AirChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 5 days agoSee prices for these dates
20 Jan 2027 – 27 Jan 2027$409Aero MongoliaChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 3 days agoSee prices for these dates
24 Jan 2027 – 22 Feb 2027$342Asiana AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 8 days agoSee prices for these dates
26 Jan 2027 – 29 Jan 2027$476MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 7 days agoSee prices for these dates
31 Jan 2027 – 22 Feb 2027$342Asiana AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 8 days agoSee prices for these dates

Which month looks cheapest?

December 2026 is the cheapest month — from $308.

November 2026From $33115 departure dates29 Nov – 8 Dec · found 2 days agoSee prices for these datesEvery date in November 2026
December 2026From $308Cheapest seen20 departure dates10 Dec – 13 Dec · found 7 days agoSee prices for these datesEvery date in December 2026
January 2027From $34214 departure dates24 Jan 2027 – 22 Feb 2027 · found 8 days agoSee prices for these dates
February 2027From $3889 departure dates8 Feb 2027 – 15 Feb 2027 · found 5 days agoSee prices for these datesEvery date in February 2027
March 2027From $3778 departure dates21 Mar 2027 – 1 Apr 2027 · found 6 days agoSee prices for these datesEvery date in March 2027
April 2027From $3435 departure dates1 Apr 2027 – 10 Apr 2027 · found 6 days agoSee prices for these dates
May 2027From $3613 departure dates18 May 2027 – 4 Jun 2027 · found 6 days agoSee prices for these dates
June 2027From $3984 departure dates6 Jun 2027 – 14 Jun 2027 · found 4 days agoSee prices for these dates
July 2027From $4213 departure dates24 Jul 2027 – 6 Aug 2027 · found 3 days agoSee prices for these dates
August 2027From $4124 departure dates17 Aug 2027 – 26 Aug 2027 · found 7 days agoSee prices for these dates
September 2027From $4121 departure date1 Sept 2027 – 12 Sept 2027 · found 2 days agoSee prices for these dates
October 2027From $3983 departure dates16 Oct 2027 – 25 Oct 2027 · found 7 days agoSee prices for these dates

One-way

In January 2027, the cheapest one-way fare on each of 8 departure dates is usually $169 to $225. Across all 45 departure dates we hold on this route, it is usually $181 to $231. Of the 7 months with enough one-way fares to compare, 2 are usually cheaper than January 2027.

Cheapest one-way found recently

$161

12 Jan 2027 · Jeju Air

Chinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)

nonstop

found 2 days ago

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Cheapest we hold, of any age

$155

19 Jan 2027 · Jeju Air

Chinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)

nonstop

found 6 days ago

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The cheapest dates in January 2027

DatesFromAirlineStopsFound
19 Jan 2027$155Jeju Airnonstopfound 6 days agoOpen this trip
12 Jan 2027$161Jeju Airnonstopfound 2 days agoOpen this trip
24 Jan 2027$172Jeju Airnonstopfound 5 days agoOpen this trip
20 Jan 2027$205Korean Airnonstopfound 6 days agoOpen this trip
18 Jan 2027$218Korean Airnonstopfound 3 days agoOpen this trip

Every date we hold

8 departure dates

2 Jan 2027: $250, found 7 days ago9 Jan 2027: $229, found 5 days ago12 Jan 2027: $161, found 2 days ago13 Jan 2027: $223, found 2 days ago18 Jan 2027: $218, found 3 days ago19 Jan 2027: $155, found 6 days ago20 Jan 2027: $205, found 6 days ago24 Jan 2027: $172, found 5 days agoJan
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
2 Jan 2027$250MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)nonstopfound 7 days agoOpen this trip
9 Jan 2027$229Aero MongoliaChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)nonstopfound 5 days agoOpen this trip
12 Jan 2027$161Jeju AirChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)nonstopfound 2 days agoOpen this trip
13 Jan 2027$223Korean AirChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)nonstopfound 2 days agoOpen this trip
18 Jan 2027$218Korean AirChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)nonstopfound 3 days agoOpen this trip
19 Jan 2027$155Jeju AirChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)nonstopfound 6 days agoOpen this trip
20 Jan 2027$205Korean AirChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)nonstopfound 6 days agoOpen this trip
24 Jan 2027$172Jeju AirChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)nonstopfound 5 days agoOpen this trip

Which month looks cheapest?

December 2026 is the cheapest month — from $150.

November 2026From $1676 departure dates17 Nov · found 3 days agoOpen this tripEvery date in November 2026
December 2026From $150Cheapest seen7 departure dates3 Dec · found 2 days agoOpen this tripEvery date in December 2026
January 2027From $1558 departure dates19 Jan 2027 · found 6 days agoOpen this trip
February 2027From $1818 departure dates7 Feb 2027 · found 4 days agoOpen this tripEvery date in February 2027
April 2027From $1924 departure dates29 Apr 2027 · found 5 days agoOpen this trip
May 2027From $2074 departure dates2 May 2027 · found 7 days agoOpen this trip
June 2027From $2312 departure dates18 Jun 2027 · found 6 days agoOpen this trip
August 2027From $2483 departure dates6 Aug 2027 · found 4 days agoOpen this trip
September 2027From $2311 departure date16 Sept 2027 · found 7 days agoOpen this trip
October 2027From $2312 departure dates26 Oct 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