Distance From Black Hills Airport-Clyde Ice Field to Siem Reap International Airport, SPF - REP Distance

The distance from Black Hills Airport-Clyde Ice Field (SPF) to Siem Reap International Airport (REP) is 8078 miles or 12999 kilometers or 7015 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 Spearfish ( United States ) to Siem Reap ( Cambodia )?

A one-way nonstop (direct) flight between Spearfish and Siem Reap takes around 18 hours 34 minutes.

Estimated flight time from Black Hills Airport-Clyde Ice Field, Spearfish, United States to Siem Reap International Airport, Siem Reap, Cambodia is 18 hours 34 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 • SPF - REP

Kilometers		12999 km
Statute Miles		8078 miles
Nautical Miles		7015 nm
Avg. Time of Flight		18 hours 34 minutes

Black Hills Airport-Clyde Ice Field to Siem Reap International Airport Flight Route Map - SPF to REP Flight Path

Location of Black Hills Airport-Clyde Ice Field & Siem Reap International Airport is given below.
Click the map to view Spearfish to Siem Reap nonstop flight path and travel direction.

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

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

Time Difference Between the Airports • SPF - REP

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

Location	Local Time
Spearfish (United States)	2026-08-02, 17:06:48 CDT
Siem Reap (Cambodia)	2026-08-03, 05:06:48 +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

Black Hills Airport-Clyde Ice Field (SPF / KSPF) Spearfish, United States

Destination

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