Distance From Thorn Airport to Ulaanbaatar Chinggis Khaan International Airport

The distance from Thorn Airport () to Ulaanbaatar Chinggis Khaan International Airport (UBN) is 6061 miles or 9753 kilometers or 5263 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 Custer ( United States ) to Ulaanbaatar (Sergelen) ( Mongolia )?

A one-way nonstop (direct) flight between Custer and Ulaanbaatar (Sergelen) takes around 13 hours 55 minutes.

Estimated flight time from Thorn Airport, Custer, United States to Ulaanbaatar Chinggis Khaan International Airport, Ulaanbaatar (Sergelen), Mongolia is 13 hours 55 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 • - UBN

Kilometers		9753 km
Statute Miles		6061 miles
Nautical Miles		5263 nm
Avg. Time of Flight		13 hours 55 minutes

Thorn Airport to Ulaanbaatar Chinggis Khaan International Airport Flight Route Map - to UBN Flight Path

Location of Thorn Airport & Ulaanbaatar Chinggis Khaan International Airport is given below.
Click the map to view Custer to Ulaanbaatar (Sergelen) nonstop flight path and travel direction.

Click to see flight route on Google Map between Custer, United States and Ulaanbaatar (Sergelen), Mongolia. .

Nonstop flight route between Custer, United States and Ulaanbaatar (Sergelen), Mongolia.

Time Difference Between the Airports • - UBN

Time difference between Custer (United States) and Ulaanbaatar (Sergelen) (Mongolia) is 14 Hours.
Ulaanbaatar (Sergelen) time is 14 Hours ahead of Custer.

Location	Local Time
Custer (United States)	2025-12-06, 00:01:22 CST
Ulaanbaatar (Sergelen) (Mongolia)	2025-12-06, 14:01:22 +08

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

Thorn Airport ( / MI19) Custer, United States

Destination

Ulaanbaatar Chinggis Khaan International Airport (UBN / ZMCK) Ulaanbaatar (Sergelen), Mongolia