Distance From Thornton River Airport to Siem Reap International Airport

The distance from Thornton River Airport () to Siem Reap International Airport (REP) is 8839 miles or 14224 kilometers or 7676 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 Castleton ( United States ) to Siem Reap ( Cambodia )?

A one-way nonstop (direct) flight between Castleton and Siem Reap takes around 20 hours 19 minutes.

Estimated flight time from Thornton River Airport, Castleton, United States to Siem Reap International Airport, Siem Reap, Cambodia is 20 hours 19 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 • - REP

Kilometers		14224 km
Statute Miles		8839 miles
Nautical Miles		7676 nm
Avg. Time of Flight		20 hours 19 minutes

Thornton River Airport to Siem Reap International Airport Flight Route Map - to REP Flight Path

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

Click to see flight route on Google Map between Castleton, United States and Siem Reap, Cambodia. .

Nonstop flight route between Castleton, United States and Siem Reap, Cambodia.

Time Difference Between the Airports • - REP

Time difference between Castleton (United States) and Siem Reap (Cambodia) is 12 Hours.
Siem Reap time is 12 Hours ahead of Castleton.

Location	Local Time
Castleton (United States)	2025-12-14, 20:22:23 EST
Siem Reap (Cambodia)	2025-12-15, 08:22:23 +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

Thornton River Airport ( / ) Castleton, United States

Destination

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