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Ulaanbaatar to Seoul in May 2027 UBN → GMP, ICN

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

For departures in May 2027, the cheapest return found recently is $413 with MIAT Mongolian Airlines, 4 May 2027 – 22 May 2027, found yesterday.

Return

In May 2027, the cheapest return fare on each of 9 departure dates is usually $411 to $413. Across all 116 departure dates we hold on this route, it is usually $398 to $421. Of the 10 months with enough return fares to compare, 6 are usually cheaper than May 2027.

Cheapest return found recently

$413

4 May 2027 – 22 May 2027 · MIAT Mongolian Airlines

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

out nonstop, back nonstop

found yesterday

See prices for these datesCheck today's price

Cheapest we hold, of any age

$410

27 May 2027 – 27 Jun 2027 · MIAT Mongolian Airlines

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

out nonstop, back nonstop

found 4 days ago

See prices for these datesCheck today's price

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The cheapest dates in May 2027

DatesFromAirlineStopsFound
27 May 2027 – 27 Jun 2027$410MIAT Mongolian Airlinesout nonstop, back nonstopfound 4 days agoSee prices for these dates
29 May 2027 – 29 Jun 2027$410MIAT Mongolian Airlinesout nonstop, back nonstopfound 4 days agoSee prices for these dates
26 May 2027 – 26 Jun 2027$411MIAT Mongolian Airlinesout nonstop, back nonstopfound 4 days agoSee prices for these dates
28 May 2027 – 28 Jun 2027$411MIAT Mongolian Airlinesout nonstop, back nonstopfound 4 days agoSee prices for these dates
31 May 2027 – 1 Jul 2027$411MIAT Mongolian Airlinesout nonstop, back nonstopfound 4 days agoSee prices for these dates

Every date we hold

9 departure dates

4 May 2027 – 22 May 2027: $413, found yesterday6 May 2027 – 18 May 2027: $444, found yesterday8 May 2027 – 17 May 2027: $413, found yesterday26 May 2027 – 26 Jun 2027: $411, found 4 days ago27 May 2027 – 27 Jun 2027: $410, found 4 days ago28 May 2027 – 28 Jun 2027: $411, found 4 days ago29 May 2027 – 29 Jun 2027: $410, found 4 days ago30 May 2027 – 30 Jun 2027: $427, found 4 days ago31 May 2027 – 1 Jul 2027: $411, found 4 days agoMay
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
4 May 2027 – 22 May 2027$413MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound yesterdaySee prices for these dates
6 May 2027 – 18 May 2027$444MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound yesterdaySee prices for these dates
8 May 2027 – 17 May 2027$413MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound yesterdaySee prices for these dates
26 May 2027 – 26 Jun 2027$411MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 4 days agoSee prices for these dates
27 May 2027 – 27 Jun 2027$410MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 4 days agoSee prices for these dates
28 May 2027 – 28 Jun 2027$411MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 4 days agoSee prices for these dates
29 May 2027 – 29 Jun 2027$410MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 4 days agoSee prices for these dates
30 May 2027 – 30 Jun 2027$427MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 4 days agoSee prices for these dates
31 May 2027 – 1 Jul 2027$411MIAT Mongolian AirlinesChinggis 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 $282.

October 2026From $39611 departure dates23 Oct – 8 Dec · found todaySee prices for these datesEvery date in October 2026
November 2026From $29120 departure dates26 Nov – 29 Nov · found 5 days agoSee prices for these datesEvery date in November 2026
December 2026From $282Cheapest seen23 departure dates8 Dec – 15 Dec · found 6 hours agoSee prices for these datesEvery date in December 2026
January 2027From $39013 departure dates20 Jan 2027 – 30 Jan 2027 · found 3 days agoSee prices for these datesEvery date in January 2027
February 2027From $4017 departure dates1 Feb 2027 – 3 Mar 2027 · found 3 days agoSee prices for these datesEvery date in February 2027
March 2027From $39712 departure dates8 Mar 2027 – 23 Mar 2027 · found todaySee prices for these datesEvery date in March 2027
April 2027From $4039 departure dates24 Apr 2027 – 3 May 2027 · found 5 days agoSee prices for these datesEvery date in April 2027
May 2027From $4109 departure dates27 May 2027 – 27 Jun 2027 · found 4 days agoSee prices for these dates
June 2027From $4034 departure dates1 Jun 2027 – 2 Jul 2027 · found 5 days agoSee prices for these dates
July 2027From $4095 departure dates14 Jul 2027 – 26 Jul 2027 · found 5 days agoSee prices for these datesEvery date in July 2027
August 2027From $4111 departure date27 Aug 2027 – 1 Sept 2027 · found 5 days agoSee prices for these dates
September 2027From $4012 departure dates16 Sept 2027 – 30 Sept 2027 · found 5 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