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Ulaanbaatar to Seoul in April 2027 UBN → GMP, ICN

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

For departures in April 2027, the cheapest return found recently is $410 with MIAT Mongolian Airlines, 5 Apr 2027 – 26 Apr 2027, found today. The cheapest one-way found recently is $230 with MIAT Mongolian Airlines, 3 Apr 2027, found today.

Return

In April 2027, the cheapest return fare on each of 9 departure dates is usually $410 to $420. 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, 8 are usually cheaper than April 2027.

Cheapest return found recently

$410

5 Apr 2027 – 26 Apr 2027 · MIAT Mongolian Airlines

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

out nonstop, back nonstop

found today

See prices for these datesCheck today's price

Cheapest we hold, of any age

$403

24 Apr 2027 – 3 May 2027 · MIAT Mongolian Airlines

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

out nonstop, back nonstop

found 5 days ago

See prices for these datesCheck today's price

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The cheapest dates in April 2027

DatesFromAirlineStopsFound
24 Apr 2027 – 3 May 2027$403MIAT Mongolian Airlinesout nonstop, back nonstopfound 5 days agoSee prices for these dates
19 Apr 2027 – 28 Apr 2027$404MIAT Mongolian Airlinesout nonstop, back nonstopfound 5 days agoSee prices for these dates
5 Apr 2027 – 26 Apr 2027$410MIAT Mongolian Airlinesout nonstop, back nonstopfound todaySee prices for these dates
3 Apr 2027 – 17 Apr 2027$417Aero Mongoliaout nonstop, back nonstopfound todaySee prices for these dates
22 Apr 2027 – 1 May 2027$420MIAT Mongolian Airlinesout nonstop, back nonstopfound 5 days agoSee prices for these dates

Every date we hold

9 departure dates

3 Apr 2027 – 17 Apr 2027: $417, found today5 Apr 2027 – 26 Apr 2027: $410, found today19 Apr 2027 – 28 Apr 2027: $404, found 5 days ago20 Apr 2027 – 29 Apr 2027: $436, found 5 days ago21 Apr 2027 – 30 Apr 2027: $451, found 5 days ago22 Apr 2027 – 1 May 2027: $420, found 5 days ago23 Apr 2027 – 2 May 2027: $420, found 5 days ago24 Apr 2027 – 3 May 2027: $403, found 5 days ago25 Apr 2027 – 4 May 2027: $420, found 5 days agoApr
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
3 Apr 2027 – 17 Apr 2027$417Aero MongoliaChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound todaySee prices for these dates
5 Apr 2027 – 26 Apr 2027$410MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound todaySee prices for these dates
19 Apr 2027 – 28 Apr 2027$404MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 5 days agoSee prices for these dates
20 Apr 2027 – 29 Apr 2027$436MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 5 days agoSee prices for these dates
21 Apr 2027 – 30 Apr 2027$451MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 5 days agoSee prices for these dates
22 Apr 2027 – 1 May 2027$420MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 5 days agoSee prices for these dates
23 Apr 2027 – 2 May 2027$420MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 5 days agoSee prices for these dates
24 Apr 2027 – 3 May 2027$403MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 5 days agoSee prices for these dates
25 Apr 2027 – 4 May 2027$420MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)out nonstop, back nonstopfound 5 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 dates
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

In April 2027, the cheapest one-way fare on each of 4 departure dates is usually $233 to $253. Across all 51 departure dates we hold on this route, it is usually $197 to $235. Of the 7 months with enough one-way fares to compare, April 2027 is usually the most expensive.

Cheapest one-way found recently

$230

3 Apr 2027 · MIAT Mongolian Airlines

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

nonstop

found today

Open this tripCheck today's price

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

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The cheapest dates in April 2027

DatesFromAirlineStopsFound
3 Apr 2027$230MIAT Mongolian Airlinesnonstopfound todayOpen this trip
2 Apr 2027$234MIAT Mongolian Airlinesnonstopfound todayOpen this trip
5 Apr 2027$251MIAT Mongolian Airlinesnonstopfound 6 days agoOpen this trip
1 Apr 2027$260MIAT Mongolian Airlinesnonstopfound 2 days agoOpen this trip

Every date we hold

4 departure dates

1 Apr 2027: $260, found 2 days ago2 Apr 2027: $234, found today3 Apr 2027: $230, found today5 Apr 2027: $251, found 6 days agoApr
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
1 Apr 2027$260MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)nonstopfound 2 days agoOpen this trip
2 Apr 2027$234MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)nonstopfound todayOpen this trip
3 Apr 2027$230MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)nonstopfound todayOpen this trip
5 Apr 2027$251MIAT Mongolian AirlinesChinggis Khaan International Airport (UBN) → Incheon International Airport (ICN)nonstopfound 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 tripEvery date in October 2026
November 2026From $14313 departure dates26 Nov · found yesterdayOpen this tripEvery date in November 2026
December 2026From $133Cheapest seen12 departure dates8 Dec · found 2 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 trip
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