Distance From Hot Springs County Airport to Siem Reap International Airport, THP - REP Distance

The distance from Hot Springs County Airport (THP) to Siem Reap International Airport (REP) is 7999 miles or 12872 kilometers or 6946 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 Thermopolis ( United States ) to Siem Reap ( Cambodia )?

A one-way nonstop (direct) flight between Thermopolis and Siem Reap takes around 18 hours 23 minutes.

Estimated flight time from Hot Springs County Airport, Thermopolis, United States to Siem Reap International Airport, Siem Reap, Cambodia is 18 hours 23 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 • THP - REP

Kilometers		12872 km
Statute Miles		7999 miles
Nautical Miles		6946 nm
Avg. Time of Flight		18 hours 23 minutes

Hot Springs County Airport to Siem Reap International Airport Flight Route Map - THP to REP Flight Path

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

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

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

Time Difference Between the Airports • THP - REP

Time difference between Thermopolis (United States) and Siem Reap (Cambodia) is 14 Hours.
Siem Reap time is 14 Hours ahead of Thermopolis.

Location	Local Time
Thermopolis (United States)	2026-11-07, 14:14:53 MST
Siem Reap (Cambodia)	2026-11-08, 04:14:53 +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

Hot Springs County Airport (THP / KHSG) Thermopolis, United States

Destination

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