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Ulaanbaatar to Seoul in October 2026 UBN → GMP, ICN

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

For departures in October 2026, the cheapest return found recently is $396 with Air China, 23 Oct – 8 Dec, found today. The cheapest one-way found recently is $206 with Jeju Air, 27 Oct, found 6 days ago.

Return

In October 2026, the cheapest return fare on each of 11 departure dates is usually $460 to $523. 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, October 2026 is usually the most expensive.

Cheapest return found recently

$396

23 Oct – 8 Dec · Air China

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

out 1 stop, back nonstop

found today

See prices for these datesCheck today's price

It is also the cheapest return we hold, of any age.

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The cheapest dates in October 2026

DatesFromAirlineStopsFound
23 Oct – 8 Dec$396Air Chinaout 1 stop, back nonstopfound todaySee prices for these dates
27 Oct – 10 Nov$422Asiana Airlinesout nonstop, back nonstopfound 4 days agoSee prices for these dates
25 Oct – 5 Nov$451Jeju Airout nonstop, back nonstopfound 6 days agoSee prices for these dates
26 Oct – 9 Nov$468Aero Mongoliaout nonstop, back nonstopfound yesterdaySee prices for these dates
28 Oct – 11 Nov$476Korean Airout nonstop, back nonstopfound 5 days agoSee prices for these dates

Every date we hold

11 departure dates

20 Oct – 20 Nov: $524, found 2 days ago21 Oct – 2 Nov: $499, found yesterday22 Oct – 7 Nov: $606, found 6 days ago23 Oct – 8 Dec: $396, found today24 Oct – 29 Oct: $477, found 5 days ago25 Oct – 5 Nov: $451, found 6 days ago26 Oct – 9 Nov: $468, found yesterday27 Oct – 10 Nov: $422, found 4 days ago28 Oct – 11 Nov: $476, found 5 days ago29 Oct – 8 Nov: $522, found 5 days ago31 Oct – 10 Nov: $540, found 2 days agoOct
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
20 Oct – 20 Nov$524MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 2 days agoSee prices for these dates
21 Oct – 2 Nov$499Aero MongoliaChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound yesterdaySee prices for these dates
22 Oct – 7 Nov$606Asiana AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 6 days agoSee prices for these dates
23 Oct – 8 Dec$396Air ChinaChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out 1 stop, back nonstopfound todaySee prices for these dates
24 Oct – 29 Oct$477Air ChinaChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out 1 stop, back 1 stopfound 5 days agoSee prices for these dates
25 Oct – 5 Nov$451Jeju AirChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 6 days agoSee prices for these dates
26 Oct – 9 Nov$468Aero MongoliaChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound yesterdaySee prices for these dates
27 Oct – 10 Nov$422Asiana AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 4 days agoSee prices for these dates
28 Oct – 11 Nov$476Korean AirChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 5 days agoSee prices for these dates
29 Oct – 8 Nov$522Asiana AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 5 days agoSee prices for these dates
31 Oct – 10 Nov$540Aero MongoliaChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 2 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 dates
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 7 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 datesEvery date in May 2027
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

One-way

We hold one-way fares on only 1 departure date in October 2026, too few to say what one usually costs.

Cheapest one-way found recently

$206

27 Oct · Jeju Air

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

stops unknown

found 6 days ago

Open this tripCheck today's price

It is also the cheapest one-way we hold, of any age.

FareTell may earn a commission when you book through a partner.

The cheapest dates in October 2026

DatesFromAirlineStopsFound
27 Oct$206Jeju Airstops unknownfound 6 days agoOpen this trip

Every date we hold

1 departure date

See every date as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
27 Oct$206Jeju AirChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)stops unknownfound 6 days agoOpen this trip

Which month looks cheapest?

December 2026 is the cheapest month — from $133.

October 2026From $2061 departure date27 Oct · found 6 days agoOpen this trip
November 2026From $14313 departure dates26 Nov · found yesterdayOpen this tripEvery date in November 2026
December 2026From $133Cheapest seen12 departure dates8 Dec · found 4 hours agoOpen this tripEvery date in December 2026
January 2027From $2293 departure dates16 Jan 2027 · found 5 days agoOpen this tripEvery date in January 2027
February 2027From $2273 departure dates27 Feb 2027 · found yesterdayOpen this tripEvery date in February 2027
March 2027From $1877 departure dates9 Mar 2027 · found 6 days agoOpen this tripEvery date in March 2027
April 2027From $2304 departure dates3 Apr 2027 · found todayOpen this tripEvery date in April 2027
June 2027From $2401 departure date21 Jun 2027 · found 2 days agoOpen this trip
July 2027From $2317 departure dates22 Jul 2027 · found todayOpen this tripEvery date in July 2027

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