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

The distance from New Siem Reap Angkor International Airport (under construction) () to Mattala Rajapaksa International Airport (HRI) is 1646 miles or 2649 kilometers or 1430 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 Mattala ( Sri Lanka )?

A one-way nonstop (direct) flight between Siem Reap (Paoy Smach) and Mattala takes around 3 hours 47 minutes.

Estimated flight time from New Siem Reap Angkor International Airport (under construction), Siem Reap (Paoy Smach), Cambodia to Mattala Rajapaksa International Airport, Mattala, Sri Lanka is 3 hours 47 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 • - HRI

Kilometers		2649 km
Statute Miles		1646 miles
Nautical Miles		1430 nm
Avg. Time of Flight		3 hours 47 minutes

New Siem Reap Angkor International Airport (under construction) to Mattala Rajapaksa International Airport Flight Route Map - to HRI Flight Path

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

Click to see flight route on Google Map between Siem Reap (Paoy Smach), Cambodia and Mattala, Sri Lanka. .

Nonstop flight route between Siem Reap (Paoy Smach), Cambodia and Mattala, Sri Lanka.

Time Difference Between the Airports • - HRI

Time difference between Siem Reap (Paoy Smach) (Cambodia) and Mattala (Sri Lanka) is 1 Hours 30 Minutes.
Mattala time is 1 Hours 30 Minutes behind Siem Reap (Paoy Smach).

Location	Local Time
Siem Reap (Paoy Smach) (Cambodia)	2026-06-23, 06:01:15 +07
Mattala (Sri Lanka)	2026-06-23, 04:31:15 +0530

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

Mattala Rajapaksa International Airport (HRI / VCRI) Mattala, Sri Lanka