Seoul to Ulaanbaatar (Sergelen) (ICN–UBN) — Airlines, Schedules & Connections
No flights match your filters.
No scheduled airline flights on this route — it's flown by charter / private operators (). No nonstop flights on this route. connecting options below.
Most recently operated nonstop flights — the month shown is when each was last scheduled. Most destinations remain reachable with a connection.
No discontinued nonstop flights on record for this route.
ICN–UBN is served by 3 airlines with nonstop service. Korean Air, Jeju Air and Asiana Airlines lead the route. The flight covers 1,216 miles in approximately 3h 40m. Beyond nonstop, 1-stop connecting options are also available.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| KE Korean Air | 14 | 333, 73G | 3h35-3h40 | – | SkyTeam | – |
| 7C Jeju Air | 5 | 738 | 3h40 | – | – | – |
| OZ Asiana Airlines | 5 | 32Q | 3h45 | – | Star Alliance | – |
Weekly Schedule Pattern
Connection Landscape
Travel Essentials
ICN: KST · UBN: +08
When it's 6:00 PM in Seoul, it's 5:00 PM in Ulaanbaatar (Sergelen).
South Korean passport holders enter Mongolia visa-free for up to 30 days. No fee, no advance application. Passport must be valid for at least 6 months beyond the date of entry. You need proof of onward travel and accommodation for at least the first night. For stays beyond 30 days, register with the Mongolian Immigration Agency within 7 days of arrival (your hotel may handle this automatically).
At Chinggis Khaan International Airport (UBN), immigration stamps your passport for 30 days. Extensions up to 90 days total are available at the Immigration Agency in Ulaanbaatar for MNT 42,000 (about $12), filed before the initial 30 days expire. Overstays result in fines of MNT 250,000 (about $72) and potential travel bans. Business visitors on the visa-free entry cannot exceed 30 days without switching to a business visa.
Direct flights from Seoul Incheon to Ulaanbaatar run about 3 hours 30 minutes on Korean Air, MIAT Mongolian Airlines, and budget carriers. Mongolia uses the Mongolian tugrik (MNT), trading at roughly 0.39 KRW per MNT 1. ATMs in Ulaanbaatar accept foreign Visa and Mastercard, but outside the capital, cash is essential. No mandatory vaccinations. Mongolia has a sizable Korean expat and student community in Ulaanbaatar, with Korean restaurants clustered near Seoul Street. Summer (June to August) is the only practical season for countryside travel. The Naadam Festival in mid-July features horse racing, wrestling, and archery. Book domestic flights to the Gobi on Hunnu Air or Aero Mongolia from UBN.
AREX (Airport Railroad Express) runs two services from Seoul Station: the Direct Train (43 min, ₩11,000, reserved seats) and the All-Stop train (66 min, ₩4,550, unreserved). Both trains serve T1 first, then T2; confirm which terminal your airline uses before boarding.Limousine buses depart from major Seoul neighborhoods and hotels (₩16,000–18,000, 60–90 min depending on traffic). KAL and LIMOUSINE services are reliable. Taxis from central Seoul cost ₩65,000–80,000 and take 60–90 minutes. Deluxe (black) taxis are pricier but English-speaking drivers are more common.
ICN–UBN Quick Facts
Frequently Asked Questions
Flights from ICN to UBN
Incheon International Airport (ICN) and Ulaanbaatar Chinggis Khaan International Airport (UBN) are connected by nonstop service from Korean Air, Jeju Air and Asiana Airlines. With 24 weekly departures, this is a well served route.
ICN to UBN Flight Duration and Schedule
Nonstop flight time from ICN to UBN is about 3 hours 40 minutes gate to gate. The route covers a distance of 1,216 miles (1,957 km). There are approximately 24 weekly flights outbound and 26 return, totaling 50 flights per week in both directions.
Connecting Options and Alternatives
1-stop connecting options are also available, commonly via Narita, Hong Kong and Shanghai Pudong. Two-stop connections are also available via intermediate hubs.