Distance From Buyant-Ukhaa International Airport to St Louis Lambert International Airport, ULN - STL Distance

The distance from Buyant-Ukhaa International Airport (ULN) to St Louis Lambert International Airport (STL) is 6362 miles or 10238 kilometers or 5525 nautical miles.

The distance shown below is direct flight distance between airports. Straight-line distance does not account for the surface between the two points. It is the distance a bird or airplane would travel between the two points when flying above the surface. The straight line distance is the direct route between two points, regardless of whether or not there are roads that connect them.

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How long does it take to travel from Ulaanbaatar ( Mongolia ) to St Louis ( United States )?

A one-way nonstop (direct) flight between Ulaanbaatar and St Louis takes around 14 hours 37 minutes.

Estimated flight time from Buyant-Ukhaa International Airport, Ulaanbaatar, Mongolia to St Louis Lambert International Airport, St Louis, United States is 14 hours 37 minutes under avarage conditions. Your actual flying time may vary depending on wind direction/speed or weather conditions. This calculation does not include the departure and landing times of the aircraft. In addition, it does not cover the person identity check, ticket check-in and baggage collection times at the airport.

Travel Distance Between the Airports • ULN - STL

Kilometers		10238 km
Statute Miles		6362 miles
Nautical Miles		5525 nm
Avg. Time of Flight		14 hours 37 minutes

Buyant-Ukhaa International Airport to St Louis Lambert International Airport Flight Route Map - ULN to STL Flight Path

Location of Buyant-Ukhaa International Airport & St Louis Lambert International Airport is given below.
Click the map to view Ulaanbaatar to St Louis nonstop flight path and travel direction.

Click to see flight route on Google Map between Ulaanbaatar, Mongolia and St Louis, United States. .

Nonstop flight route between Ulaanbaatar, Mongolia and St Louis, United States.

Time Difference Between the Airports • ULN - STL

Time difference between Ulaanbaatar (Mongolia) and St Louis (United States) is 12 Hours.
St Louis time is 12 Hours behind Ulaanbaatar.

Location	Local Time
Ulaanbaatar (Mongolia)	2026-07-29, 22:36:35 +08
St Louis (United States)	2026-07-29, 10:36:35 EDT

Why should you arrive 3 hours before international flight? Flyers who are traveling to an international destination should arrive at the airport earlier than domestic flyers. This is because international flights can have additional check-in requirements, like passport verification, that need to be completed before you receive your boarding pass.

Origin

Buyant-Ukhaa International Airport (ULN / ZMUB) Ulaanbaatar, Mongolia

Destination

St Louis Lambert International Airport (STL / KSTL) St Louis, United States