Cheap flights from Seoul to Ulaanbaatar

One-way fares from $170 · SEL → UBN · prices found by travellers in the last 48 hours

Compare all dates Ulaanbaatar → Seoul
Cheapest fare
$170

Jeju Air · Tue, Dec 8

Cheapest month
December

from $170

Direct flights
Yes

Jeju Air, Aero Mongolia, Asiana Airlines + 2 more

Flight time
3h 15m

1,990 km

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Cheapest month to fly from Seoul to Ulaanbaatar

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. November 2026 $196
  2. December 2026 Cheapest $170
  3. January 2027 $195
  4. February 2027 $236
  5. March 2027 $214
  6. April 2027 $211
  7. June 2027 $241

Cheapest dates in December 2026

The lowest fares we've seen for each day, cheapest first.

Jeju Air
Depart11:30 Tue, Dec 8ICN → UBN 3h 45m · Direct
$170one way, per person
View deal
Jeju Air
Depart11:30 Sun, Dec 6ICN → UBN 3h 45m · Direct
$175one way, per person
View deal
Jeju Air
Depart11:30 Sun, Dec 13ICN → UBN 3h 45m · Direct
$178one way, per person
View deal
Jeju Air
Depart11:30 Thu, Dec 3ICN → UBN 3h 45m · Direct
$180one way, per person
View deal
Jeju Air
Depart11:30 Tue, Dec 15ICN → UBN 3h 45m · Direct
$187one way, per person
View deal
Jeju Air
Depart11:30 Tue, Dec 22ICN → UBN 3h 45m · Direct
$200one way, per person
View deal
Jeju Air
Depart11:30 Thu, Dec 31ICN → UBN 3h 45m · Direct
$203one way, per person
View deal
Jeju Air
Depart11:30 Thu, Dec 17ICN → UBN 3h 45m · Direct
$210one way, per person
View deal
See every date in December 2026 →

Plan the rest of your trip to Ulaanbaatar

Where to stay, what to do and getting around, from our travel partners.

Where to stay

Hotels in UlaanbaatarCompare places to stay on Booking.com Find hotels →

Things to do

Things to do in UlaanbaatarTours, attractions and day trips on Klook Explore →

Getting around

Airport transfer in UlaanbaatarPre-book a driver to meet you at arrivals, with Kiwitaxi Book a transfer → Car hire in UlaanbaatarCompare rental cars from major brands on EconomyBookings Compare cars →

Stay connected

eSIM for MongoliaMobile data from the moment you land, by Airalo Get eSIM →

About flights from Seoul to Ulaanbaatar

Seoul (SEL) and Ulaanbaatar (UBN) are about 1,990 km apart. Direct flights take around 3h 15m, and recent direct fares were with Jeju Air, Aero Mongolia, Asiana Airlines, MIAT Mongolian Airlines and Korean Air. Over the next few months, one-way fares start from $170, and December 2026 is currently the cheapest month to fly.

These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.

Frequently asked questions

How much is a flight from Seoul to Ulaanbaatar?

The cheapest one-way fare we've seen recently is $170 with Jeju Air, departing Tuesday, December 8, 2026. Over the coming months, the lowest fare in each month ranges from $170 to $241.

What is the cheapest month to fly from Seoul to Ulaanbaatar?

December 2026 currently has the lowest fares, from $170 one way.

Are there direct flights from Seoul to Ulaanbaatar?

Yes. Recent direct fares were with Jeju Air, Aero Mongolia, Asiana Airlines, MIAT Mongolian Airlines and Korean Air.

How long is the flight from Seoul to Ulaanbaatar?

A direct flight takes about 3h 15m. Seoul and Ulaanbaatar are around 1,990 km apart.

Which airlines fly from Seoul to Ulaanbaatar?

Recent fares on this route were with Jeju Air, Aero Mongolia, Asiana Airlines, MIAT Mongolian Airlines and Korean Air.

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