Distance From Castle Airport to Siem Reap International Airport, MER - REP Distance

The distance from Castle Airport (MER) to Siem Reap International Airport (REP) is 7898 miles or 12710 kilometers or 6859 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 Merced ( United States ) to Siem Reap ( Cambodia )?

A one-way nonstop (direct) flight between Merced and Siem Reap takes around 18 hours 9 minutes.

Estimated flight time from Castle Airport, Merced, United States to Siem Reap International Airport, Siem Reap, Cambodia is 18 hours 9 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 • MER - REP

Kilometers		12710 km
Statute Miles		7898 miles
Nautical Miles		6859 nm
Avg. Time of Flight		18 hours 9 minutes

Castle Airport to Siem Reap International Airport Flight Route Map - MER to REP Flight Path

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

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

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

Time Difference Between the Airports • MER - REP

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

Location	Local Time
Merced (United States)	2026-09-17, 04:43:00 PDT
Siem Reap (Cambodia)	2026-09-17, 18:43:00 +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

Castle Airport (MER / KMER) Merced, United States

Destination

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