Distance From New Siem Reap Angkor International Airport (under construction) to Ulaanbaatar Chinggis Khaan International Airport

The distance from New Siem Reap Angkor International Airport (under construction) () to Ulaanbaatar Chinggis Khaan International Airport (UBN) is 2373 miles or 3819 kilometers or 2061 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 Siem Reap (Paoy Smach) ( Cambodia ) to Ulaanbaatar (Sergelen) ( Mongolia )?

A one-way nonstop (direct) flight between Siem Reap (Paoy Smach) and Ulaanbaatar (Sergelen) takes around 5 hours 27 minutes.

Estimated flight time from New Siem Reap Angkor International Airport (under construction), Siem Reap (Paoy Smach), Cambodia to Ulaanbaatar Chinggis Khaan International Airport, Ulaanbaatar (Sergelen), Mongolia is 5 hours 27 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		3819 km
Statute Miles		2373 miles
Nautical Miles		2061 nm
Avg. Time of Flight		5 hours 27 minutes

New Siem Reap Angkor International Airport (under construction) to Ulaanbaatar Chinggis Khaan International Airport Flight Route Map - to UBN Flight Path

Location of New Siem Reap Angkor International Airport (under construction) & Ulaanbaatar Chinggis Khaan International Airport is given below.
Click the map to view Siem Reap (Paoy Smach) to Ulaanbaatar (Sergelen) nonstop flight path and travel direction.

Click to see flight route on Google Map between Siem Reap (Paoy Smach), Cambodia and Ulaanbaatar (Sergelen), Mongolia. .

Nonstop flight route between Siem Reap (Paoy Smach), Cambodia and Ulaanbaatar (Sergelen), Mongolia.

Time Difference Between the Airports • - UBN

Time difference between Siem Reap (Paoy Smach) (Cambodia) and Ulaanbaatar (Sergelen) (Mongolia) is 1 Hours.
Ulaanbaatar (Sergelen) time is 1 Hours ahead of Siem Reap (Paoy Smach).

Location	Local Time
Siem Reap (Paoy Smach) (Cambodia)	2025-12-16, 01:12:43 +07
Ulaanbaatar (Sergelen) (Mongolia)	2025-12-16, 02:12:43 +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

New Siem Reap Angkor International Airport (under construction) ( / ) Siem Reap (Paoy Smach), Cambodia

Destination

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