Cheap Flights from Ulaanbaatar to Seoul from $139

Frequently Asked Questions

• What are the cheapest flights from Ulaanbaatar to Seoul (ULN-SEL)?

  Based on Trip.com data, Jeju Air offers one-way fares as low as $139 on Cheapest nonstop routes (e.g. UBN to ICN on Thu, Nov 19), while Jeju Air offers Cheapest nonstop round-trips from $252 departing on Tue, Dec 1 and returning on Tue, Dec 8.

• Which airlines offer direct flights from Ulaanbaatar to Seoul?

  At the moment, you can catch a nonstop flight from Ulaanbaatar to Seoul with the following airlines, including: Miat Mongolian Airlines Asiana Airlines Jeju Air Trinity Airways Aero Mongolia Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• How long does it take to fly from Ulaanbaatar (ULN) to Seoul (SEL) and what is the distance?

  It takes around 3 hours 11 minutes to fly from Ulaanbaatar (ULN) to Seoul (SEL).

• When is the best time to book flights from Ulaanbaatar to Seoul?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Ulaanbaatar to Seoul is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How many flights are there per week from Ulaanbaatar to Seoul?

  Based on Trip.com data in the past 4 weeks, there is 29 flight per week flying from Ulaanbaatar to Seoul. You can check the weekly schedule for popular airlines on this route below: Miat Mongolian Airlines: S/M/T/W/T/F/S -- OM301 (09:06) Miat Mongolian Airlines: S/-/T/W/T/F/S -- OM5301 (13:15) Korean Air: S/M/T/W/T/F/S -- KE5868 (09:06)

• How can I find the best deals on flights from Ulaanbaatar to Seoul?

  To find best deals on flights from Ulaanbaatar to Seoul, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Thu, Nov 19, with one-way flights priced at just $139.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Jeju Air.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for Seoul travel is around January.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Ulaanbaatar (ULN) to Seoul (SEL) the cheapest?

  The cheapest months to fly from Ulaanbaatar to Seoul is November, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Ulaanbaatar to Seoul on?

  After crunching the numbers on our October flight calendar, it's currently cheapest to fly from Ulaanbaatar to Seoul on October 20, 2026 with Jeju Air, with prices starting at $239.

• Which airports can I fly into Seoul from Ulaanbaatar?

  You can arrive at any of the following airports in Seoul: Incheon International Airport (ICN), and Gimpo International Airport (GMP). Flights from Chinggis Khaan International Airport to Incheon International Airport (UBN-ICN) are by far the most popular option for this route.

• Is there any time difference between Ulaanbaatar and Seoul?

  The time difference between Seoul and Ulaanbaatar is 1h.

• How do I change or cancel my ticket from Ulaanbaatar to Seoul?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

• What is the average cost of a one-way flight from Ulaanbaatar to Seoul?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Ulaanbaatar to Seoul is $333. Fares vary by travel date, airline and availability.

• What is the average cost of a round-trip flight from Ulaanbaatar to Seoul?

  Based on Trip.com data for travel in the next 30 days, the average round-trip fare from Ulaanbaatar to Seoul is $643. The final price depends on the outbound and return dates, airline and fare conditions.

• How do I book flights from Ulaanbaatar to Seoul on Trip.com?

  Enter Ulaanbaatar and Seoul, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.

• Are there budget airlines on the Ulaanbaatar to Seoul route?

  Jeju Air and Trinity Airwaysare the most popular budget airlines flying from Ulaanbaatar to Seoul. Check baggage, seat and payment fees before comparing the final price.