Are there nonstop flights from Preah Sihanouk (KOS) to Siem Reap (SAI)?

Yes. Air Cambodia, Cambodia Airways fly this route. Flight time is about 52m.

What is the fastest connection from Preah Sihanouk (KOS) to Siem Reap (SAI)?

via Ho Chi Minh City ≈ 1h 50m, via Bangkok ≈ 2h (estimated flying time, excluding layovers).

Sihanouk International Airport (KOS) to Siem Reap-Angkor International Airport (SAI)・318 km

Nonstop flights available (2 airlines). Flight time about 52m. Nonstop return flights also operate.

2 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.