The cheapest times to fly from SFO to KOS are

  • January 29th to April 1st
  • May 14th to June 3rd (except the week of May 21st)
  • August 20th to December 9th (except the weeks of September 3rd and November 19th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from SFO to KOS is late February and early March. Prices can be as high as $7992 for Thursday flights during early to mid May, or as low as $836 for Tuesday flights around late February and early March.


When to Fly to Sihanoukville

Flying from San Francisco, CA (SFO) to Kompongsom (KOS) will usually cost between $854 to $1588 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late February and early March with an average ticket price of $864. Due to high demand the most expensive time to fly is early to mid May, with an average price of $2657. Planning your trip to low-cost times can easily save you $1793 on economy flights and even more on first-class flights. Generally, any price below $971 can be considered a good price for a round-trip SFO to KOS flight.

See below for a graph of average weekly prices for the SFO to KOS route. All prices are for round-trip tickets in USD.

SFO to KOS Flight Prices

Compared to other flights, the SFO to KOS flight is priced close to the average and costs less than the average flight leaving from San Francisco. The average price per mile (for a direct flight) is $0.08, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to fly to KOS, and Sunday the cheapest day to fly back into SFO. Thursdays are the most expensive days to fly to Sihanoukville, and Saturdays are the most expensive days to return to San Francisco. Selecting flights on the least expensive days could save you up to $571 (28%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $1016. Return trip prices are from the KOS to SFO flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from SFO to KOS can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 15 hour 19 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from SFO to KOS while comparing.

Destination alternative #1: Phnom Penh International Airport (PNH) in Phnom Penh

  • 102 miles (164 km) away from KOS
  • Usually 23.02% less expensive than KOS
  • 1-layover flights available

See SFO to PNH flights

Destination alternative #2: Phu Quoc International Airport (PQC) in Phu Quoc

  • 36 miles (58 km) away from KOS
  • Usually 15.96% less expensive than KOS
  • 1-layover flights available

See SFO to PQC flights

Destination alternative #3: Trat Airport (TDX) in Trat

  • 148 miles (238 km) away from KOS
  • Usually 1.60% less expensive than KOS
  • 2-layover flights available

See SFO to TDX flights


Flight Hacking SFO to KOS

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from SFO to KOS — but Champion Traveler does!

Hack #1: Kuala Lumpur (SFO > KUL > KOS)

  • Price for both tickets: $822
  • Average savings: $149 (15.35%)

See SFO to KUL flights

Hack #2: Ho Chi Minh City (SFO > SGN > KOS)

  • Price for both tickets: $944
  • Average savings: $27 (2.78%)

See SFO to SGN flights


Flight Questions Answered

Still have questions about flying from SFO to KOS? We’ve got answers.

Which airlines fly this route?

You can find 15 major airlines flying this route most often: Air Canada, American, ANA, Avianca, China Airlines, China Southern, Delta, EVA Air, Hainan, JAL, Shenzhen, Sichuan Airlines, United, Vietnam Airlines, Xiamen, and potentially more during busy seasons.

How far away is it from Kompongsom Airport to San Francisco International Airport?

The distance between the two airports is roughly 7968 miles or 12823 kilometers.

How long does it take to fly from SFO to KOS?

The real-world flight time for a nonstop SFO to KOS flight is about 15 hour 19 minutes.

How many flights go between San Francisco, CA and Kompongsom?

It depends on the day of the week and the date, but a typical day might have around 10 available flights from SFO to KOS.


Airport Location Info


Departing Airport

Origination code SFO
Origination airport name San Francisco International Airport
City San Francisco, CA
Country the United States
Latitude 37.6
Longitude -122.4

Return Airport

Destination code KOS
Destination airport name Kompongsom Airport
City Kompongsom
Country Cambodia
Latitude 10.6
Longitude 103.7


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.