Distance From Ulaangom Airport to Siem Reap International Airport, ULO - REP Distance

The distance from Ulaangom Airport (ULO) to Siem Reap International Airport (REP) is 2620 miles or 4217 kilometers or 2276 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 Ulaangom ( Mongolia ) to Siem Reap ( Cambodia )?

A one-way nonstop (direct) flight between Ulaangom and Siem Reap takes around 6 hours 1 minutes.

Estimated flight time from Ulaangom Airport, Ulaangom, Mongolia to Siem Reap International Airport, Siem Reap, Cambodia is 6 hours 1 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 • ULO - REP

Kilometers		4217 km
Statute Miles		2620 miles
Nautical Miles		2276 nm
Avg. Time of Flight		6 hours 1 minutes

Ulaangom Airport to Siem Reap International Airport Flight Route Map - ULO to REP Flight Path

Location of Ulaangom Airport & Siem Reap International Airport is given below.
Click the map to view Ulaangom to Siem Reap nonstop flight path and travel direction.

Click to see flight route on Google Map between Ulaangom, Mongolia and Siem Reap, Cambodia. .

Nonstop flight route between Ulaangom, Mongolia and Siem Reap, Cambodia.

Time Difference Between the Airports • ULO - REP

Time difference between Ulaangom (Mongolia) and Siem Reap (Cambodia) is 0 Hours.

Location	Local Time
Ulaangom (Mongolia)	2025-12-15, 15:35:51 +07
Siem Reap (Cambodia)	2025-12-15, 15:35:51 +07

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

Ulaangom Airport (ULO / ZMUG) Ulaangom, Mongolia

Destination

Siem Reap International Airport (REP / VDSR) Siem Reap, Cambodia