Distance From New Siem Reap Angkor International Airport (under construction) to Tribhuvan International Airport

The distance from New Siem Reap Angkor International Airport (under construction) () to Tribhuvan International Airport (KTM) is 1568 miles or 2523 kilometers or 1361 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 Kathmandu ( Nepal )?

A one-way nonstop (direct) flight between Siem Reap (Paoy Smach) and Kathmandu takes around 3 hours 36 minutes.

Estimated flight time from New Siem Reap Angkor International Airport (under construction), Siem Reap (Paoy Smach), Cambodia to Tribhuvan International Airport, Kathmandu, Nepal is 3 hours 36 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 • - KTM

Kilometers		2523 km
Statute Miles		1568 miles
Nautical Miles		1361 nm
Avg. Time of Flight		3 hours 36 minutes

New Siem Reap Angkor International Airport (under construction) to Tribhuvan International Airport Flight Route Map - to KTM Flight Path

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

Click to see flight route on Google Map between Siem Reap (Paoy Smach), Cambodia and Kathmandu, Nepal. .

Nonstop flight route between Siem Reap (Paoy Smach), Cambodia and Kathmandu, Nepal.

Time Difference Between the Airports • - KTM

Time difference between Siem Reap (Paoy Smach) (Cambodia) and Kathmandu (Nepal) is 1 Hours 15 Minutes.
Kathmandu time is 1 Hours 15 Minutes behind Siem Reap (Paoy Smach).

Location	Local Time
Siem Reap (Paoy Smach) (Cambodia)	2025-12-15, 21:50:40 +07
Kathmandu (Nepal)	2025-12-15, 20:35:40 +0545

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

Tribhuvan International Airport (KTM / VNKT) Kathmandu, Nepal