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Ulaanbaatar to Seoul flights in March 2027 from $392 UBN → GMP, ICN

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

For departures in March 2027, the cheapest return found recently is $392 with Korean Air, 22 Mar 2027 – 4 Apr 2027, found 2 days ago.

Return

In March 2027, the cheapest return fare on each of 8 departure dates is usually $389 to $399. 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, 3 are usually cheaper than March 2027.

Cheapest return found recently

$392

22 Mar 2027 – 4 Apr 2027 · Korean 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

$377

21 Mar 2027 – 1 Apr 2027 · Korean Air

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

out nonstop, back nonstop

found 6 days ago

See prices for these datesCheck today's price

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The cheapest dates in March 2027

DatesFromAirlineStopsFound
21 Mar 2027 – 1 Apr 2027$377Korean Airout nonstop, back nonstopfound 6 days agoSee prices for these dates
28 Mar 2027 – 2 Apr 2027$378Korean Airout nonstop, back nonstopfound 4 days agoSee prices for these dates
22 Mar 2027 – 4 Apr 2027$392Korean Airout nonstop, back nonstopfound 2 days agoSee prices for these dates
5 Mar 2027 – 14 Mar 2027$398MIAT Mongolian Airlinesout nonstop, back nonstopfound 2 days agoSee prices for these dates
19 Mar 2027 – 23 Mar 2027$398MIAT Mongolian Airlinesout nonstop, back nonstopfound 4 days agoSee prices for these dates

Every date we hold

8 departure dates

5 Mar 2027 – 14 Mar 2027: $398, found 2 days ago7 Mar 2027 – 21 Mar 2027: $402, found 3 days ago10 Mar 2027 – 25 Mar 2027: $413, found 3 days ago19 Mar 2027 – 23 Mar 2027: $398, found 4 days ago20 Mar 2027 – 22 Mar 2027: $398, found 4 days ago21 Mar 2027 – 1 Apr 2027: $377, found 6 days ago22 Mar 2027 – 4 Apr 2027: $392, found 2 days ago28 Mar 2027 – 2 Apr 2027: $378, found 4 days agoMar
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
5 Mar 2027 – 14 Mar 2027$398MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 2 days agoSee prices for these dates
7 Mar 2027 – 21 Mar 2027$402MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 3 days agoSee prices for these dates
10 Mar 2027 – 25 Mar 2027$413Aero MongoliaChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 3 days agoSee prices for these dates
19 Mar 2027 – 23 Mar 2027$398MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 4 days agoSee prices for these dates
20 Mar 2027 – 22 Mar 2027$398MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 4 days agoSee prices for these dates
21 Mar 2027 – 1 Apr 2027$377Korean AirChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 6 days agoSee prices for these dates
22 Mar 2027 – 4 Apr 2027$392Korean AirChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 2 days agoSee prices for these dates
28 Mar 2027 – 2 Apr 2027$378Korean AirChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 4 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 datesEvery date in January 2027
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 dates
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

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