Distance From Bost Airport to Ulaanbaatar Chinggis Khaan International Airport, BST - UBN Distance

The distance from Bost Airport (BST) to Ulaanbaatar Chinggis Khaan International Airport (UBN) is 2479 miles or 3989 kilometers or 2153 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 Lashkar Gah ( Afghanistan ) to Ulaanbaatar (Sergelen) ( Mongolia )?

A one-way nonstop (direct) flight between Lashkar Gah and Ulaanbaatar (Sergelen) takes around 5 hours 41 minutes.

Estimated flight time from Bost Airport, Lashkar Gah, Afghanistan to Ulaanbaatar Chinggis Khaan International Airport, Ulaanbaatar (Sergelen), Mongolia is 5 hours 41 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 • BST - UBN

Kilometers		3989 km
Statute Miles		2479 miles
Nautical Miles		2153 nm
Avg. Time of Flight		5 hours 41 minutes

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

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

Click to see flight route on Google Map between Lashkar Gah, Afghanistan and Ulaanbaatar (Sergelen), Mongolia. .

Nonstop flight route between Lashkar Gah, Afghanistan and Ulaanbaatar (Sergelen), Mongolia.

Time Difference Between the Airports • BST - UBN

Time difference between Lashkar Gah (Afghanistan) and Ulaanbaatar (Sergelen) (Mongolia) is 3 Hours 30 Minutes.
Ulaanbaatar (Sergelen) time is 3 Hours 30 Minutes ahead of Lashkar Gah.

Location	Local Time
Lashkar Gah (Afghanistan)	2026-09-19, 11:25:28 +0430
Ulaanbaatar (Sergelen) (Mongolia)	2026-09-19, 14:55:28 +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

Bost Airport (BST / OABT) Lashkar Gah, Afghanistan

Destination

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