Nonstop flights from Seoul to Ulaanbaatar (Sergelen)

5 airlines fly this route, with up to 9 flights a day.

ICNSeoul Incheon International

1,217 mi · 49 flights a week

UBNUlaanbaatar (Sergelen) New Ulaanbaator International

ICNUBN

When they leave

Seoul time

12:05a8:20pFirst departure 12:05 AM, last 8:20 PM

Two overnight flights, 12:05 AM to 1:50 AM, then two in the morning, 8:35 AM to 10:00 AM, then four in the afternoon, 1:45 PM to 4:35 PM, then two in the evening, 5:35 PM to 8:20 PM.

Every flight

Earliest first

12:05 AM→2:45 AMMIAT Mongolian AirlinesBoeing 787Daily
1:50 AM→4:30 AMMIAT Mongolian AirlinesBoeing 737 MAX 8Mon, Tue, Wed, Sat, Sun
8:35 AM→11:10 AMKorean AirAirbus A330-300Mon, Tue, Wed, Thu, Fri, Sun
10:00 AM→12:40 PMJeju AirBoeing 737 MAX 8Mon, Tue, Sat, Sun
1:45 PM→4:05 PMJeju AirBoeing 737 MAX 8Tue, Fri
2:20 PM→5:00 PMMIAT Mongolian AirlinesBoeing 787Daily
4:05 PM→6:45 PMMIAT Mongolian AirlinesBoeing 737Mon, Wed, Thu, Fri
4:35 PM→7:20 PMMIAT Mongolian AirlinesBoeing 737Mon
5:35 PM→7:35 PMAero MongoliaAirbus A319Mon, Wed, Thu, Fri, Sat, Sun
8:20 PM→10:50 PMKorean AirAirbus A330Thu, Sun
8:20 PM→11:05 PMAsiana AirlinesAirbus A330Mon, Tue, Wed, Fri, Sat

Schedules last checked Sep 20, 2026. Times are local.

Flying from Seoul to Ulaanbaatar (Sergelen)

MIAT Mongolian Airlines flies most often, 3 to 5 times a day on the Boeing 737, Boeing 787 and Boeing 737 MAX 8. Korean Air flies 8 times a week on the Airbus A330 and Airbus A330-300. Aero Mongolia flies 6 times a week on the Airbus A319. Jeju Air flies 6 times a week on the Boeing 737 MAX 8. Asiana Airlines flies 5 times a week on the Airbus A330.

Flights run every day of the week, from 6 on Thursdays and Saturdays to 9 on Mondays. The first arrival in Ulaanbaatar (Sergelen) is at 2:45 AM and the last at 11:05 PM. The flight covers 1,217 miles.

T'way Air stopped flying it after Sep 16.

Flying back, Ulaanbaatar (Sergelen) to Seoul has 44 nonstop flights a week.