Distance From Sihanoukville International Airport to Ontario International Airport, KOS - ONT Distance

The distance from Sihanoukville International Airport (KOS) to Ontario International Airport (ONT) is 8336 miles or 13415 kilometers or 7239 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 Preah Sihanouk ( Cambodia ) to Ontario ( United States )?

A one-way nonstop (direct) flight between Preah Sihanouk and Ontario takes around 19 hours 9 minutes.

Estimated flight time from Sihanoukville International Airport, Preah Sihanouk, Cambodia to Ontario International Airport, Ontario, United States is 19 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 • KOS - ONT

Kilometers		13415 km
Statute Miles		8336 miles
Nautical Miles		7239 nm
Avg. Time of Flight		19 hours 9 minutes

Sihanoukville International Airport to Ontario International Airport Flight Route Map - KOS to ONT Flight Path

Location of Sihanoukville International Airport & Ontario International Airport is given below.
Click the map to view Preah Sihanouk to Ontario nonstop flight path and travel direction.

Click to see flight route on Google Map between Preah Sihanouk, Cambodia and Ontario, United States. .

Nonstop flight route between Preah Sihanouk, Cambodia and Ontario, United States.

Time Difference Between the Airports • KOS - ONT

Time difference between Preah Sihanouk (Cambodia) and Ontario (United States) is 15 Hours.
Ontario time is 15 Hours behind Preah Sihanouk.

Location	Local Time
Preah Sihanouk (Cambodia)	2025-12-15, 10:44:27 +07
Ontario (United States)	2025-12-14, 19:44:27 PST

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

Sihanoukville International Airport (KOS / VDSV) Preah Sihanouk, Cambodia

Destination

Ontario International Airport (ONT / KONT) Ontario, United States