In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

What is the cheapest time of day to fly from SAI to SFO?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Siem Reap to San Francisco as you normally would.

Most accurate provider : When it comes to deals on Siem Reap-San Francisco flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Siem Reap-San Francisco flight deals on Cheapflights vs. Expedia <90% of the time. Price accuracy is based on data collected from Siem Reap-San Francisco flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Siem Reap-San Francisco flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Siem Reap-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from Siem Reap to San Francisco that include hotel bookings?

Yes. In addition to deals on Siem Reap to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Siem Reap to San Francisco?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Siem Reap to San Francisco.

Can I find deals for business class flights from Siem Reap to San Francisco?

Yes. Cheapflights offers flight deals from Siem Reap to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$500+ Cheap Flights from Siem Reap, Cambodia to San Francisco

Q: E

Most trusted provider : When it comes to deals on Siem Reap-San Francisco flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Siem Reap-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Q: Can I find deals for flights from Siem Reap to San Francisco that include hotel bookings?

Yes. In addition to deals on Siem Reap to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

Q: How can I find direct flights from Siem Reap to San Francisco?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Siem Reap to San Francisco.

Q: Can I find deals for business class flights from Siem Reap to San Francisco?

Yes. Cheapflights offers flight deals from Siem Reap to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Cheap flight deals from Siem Reap to San Francisco

Cheapest

Best

One-way

Cheapest flights from Siem Reap to San Francisco
Explore the most affordable flight options available from Siem Reap to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 18, 2026.

Fri 12/187:25 pm -

2 stops26h 15m

Mon 12/2811:50 pm -

2 stops27h 55m

Deal found 9/16

$1,083

Fri 12/1810:45 am -

1 stop36h 05m

Mon 12/289:40 am -

1 stop39h 20m

Deal found 9/15

$1,299

One-way flights from Siem Reap to San Francisco
Search for one-way flight options from Siem Reap to San Francisco. Find affordable one-way fares based on user searches. Data last updated September 18, 2026.

Sat 10/107:10 pm -

1 stop36h 45m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/16

$500

Sat 12/56:40 pm -

1 stop37h 20m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/17

$516

Mon 1/2510:45 am -

1 stop36h 05m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/14

$538

Tue 12/229:30 pm -

1 stop34h 30m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/14

$563

Tue 12/227:05 pm -

3 stops51h 45m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/15

$572

Fri 10/28:55 pm -

1 stop35h 00m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/16

$577

Sun 12/69:55 am -

2 stops24h 15m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/16

$590

Mon 1/259:55 am -

2 stops24h 15m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/14

$591

Fri 10/212:55 pm -

2 stops21h 35m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/17

$594

Sat 12/57:05 pm -

3 stops39h 20m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/16

$637

Sat 10/104:55 pm -

2 stops41h 35m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/16

$642

Find flight deals from Siem Reap to San Francisco

Most accurate provider	Expedia 1 star
Most trusted provider	Expedia 3 stars
Round-trip from	$1,083 (FlightHub)
One-way from	$500 (Booking.com)

Provider with most accurate pricing for Siem Reap–Angkor Intl-San Francisco flight deals.

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Provider most trusted by Cheapflights users for Siem Reap–Angkor Intl-San Francisco flights.

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From Siem Reap–Angkor Intl to San Francisco

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One-way flight from Siem Reap–Angkor Intl to San Francisco

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Siem Reap to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Siem ReapSan Francisco

SAI Siem Reap–Angkor Intl - SFO San Francisco

SAISFO

Siem Reap–Angkor Intl

Fri 10/2

7:10 pm-5:55 pm

1 stop36h 45m

San Francisco

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$516

Siem ReapSan Francisco

SAI Siem Reap–Angkor Intl - SFO San Francisco

SAISFO

Siem Reap–Angkor Intl

Sat 12/5

6:40 pm-5:00 pm

1 stop37h 20m

San Francisco

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$516

Siem ReapSan Francisco

SAI Siem Reap–Angkor Intl - SFO San Francisco

SAISFO

Siem Reap–Angkor Intl

Mon 1/25

10:45 am-7:50 am

1 stop36h 05m

San Francisco

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$538

Siem ReapSan Francisco

SAI Siem Reap–Angkor Intl - SFO San Francisco

SAISFO

Siem Reap–Angkor Intl

Tue 12/22

9:30 pm-5:00 pm

1 stop34h 30m

San Francisco

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$563

Siem ReapSan Francisco

SAI Siem Reap–Angkor Intl - SFO San Francisco

SAISFO

Siem Reap–Angkor Intl

Tue 12/22

7:05 pm-7:50 am

3 stops51h 45m

San Francisco

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$572

Siem ReapSan Francisco

SAI Siem Reap–Angkor Intl - SFO San Francisco

SAISFO

Siem Reap–Angkor Intl

Sun 12/6

9:55 am-7:10 pm

2 stops24h 15m

San Francisco

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$590

Siem ReapSan Francisco

SAI Siem Reap–Angkor Intl - SFO San Francisco

SAISFO

Siem Reap–Angkor Intl

Mon 1/25

9:55 am-7:10 pm

2 stops24h 15m

San Francisco

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$591

Quickest round-trip

Siem ReapSan Francisco

SAI Siem Reap–Angkor Intl - SFO San Francisco

SAISFO

Siem Reap–Angkor Intl

Fri 10/2

12:55 pm-8:30 pm

2 stops21h 35m

San Francisco

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$594

Siem ReapSan Francisco

SAI Siem Reap–Angkor Intl - SFO San Francisco

SAISFO

Siem Reap–Angkor Intl

Sat 12/5

10:00 pm-9:00 am

3 stops50h 00m

San Francisco

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$681

Siem ReapSan Francisco

SAI Siem Reap–Angkor Intl - SFO San Francisco

SAISFO

Siem Reap–Angkor Intl

Fri 12/18

7:25 pm-6:40 am

2 stops26h 15m

San Francisco

Mon 12/28

11:50 pm-6:45 pm

2 stops27h 55m

$1,083

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 11 resultsSorted by cheapest first

Most accurate provider: When it comes to deals on Siem Reap-San Francisco flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Siem Reap-San Francisco flight deals on Cheapflights vs. Expedia <90% of the time. Price accuracy is based on data collected from Siem Reap-San Francisco flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Siem Reap-San Francisco flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Siem Reap-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Siem Reap to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Siem Reap with our price prediction graph.

SAI-SFO

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Can I find deals for flights from Siem Reap to San Francisco that include hotel bookings?
Yes. In addition to deals on Siem Reap to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Siem Reap to San Francisco?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Siem Reap to San Francisco.
Can I find deals for business class flights from Siem Reap to San Francisco?
Yes. Cheapflights offers flight deals from Siem Reap to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

South San Francisco

Santa Clara

Santa Cruz

Walnut Creek

Emeryville

San Bruno

Burlingame

Rancho Cordova

Roseville

Fairfield

Hayward

Cupertino

Newark

San Ramon

Redwood City

Manteca

Vallejo

San Carlos

Turlock

Davis

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$500+ Cheap flights from Siem Reap, Cambodia (SAI) to San Francisco (SFO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/10. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Siem Reap to San Francisco with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Siem Reap to San Francisco

Cheapest flights from Siem Reap to San FranciscoExplore the most affordable flight options available from Siem Reap to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 18, 2026.

Explore the most affordable flight options available from Siem Reap to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 18, 2026.

Best flights from Siem Reap to San FranciscoDiscover carefully curated flight deals from Siem Reap to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 18, 2026.

Discover carefully curated flight deals from Siem Reap to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 18, 2026.

One-way flights from Siem Reap to San FranciscoSearch for one-way flight options from Siem Reap to San Francisco. Find affordable one-way fares based on user searches. Data last updated September 18, 2026.

Search for one-way flight options from Siem Reap to San Francisco. Find affordable one-way fares based on user searches. Data last updated September 18, 2026.

Find flight deals from Siem Reap to San Francisco

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Most trusted provider

Round-trip from

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Cheapflights Fare Finder

Use the filters below to find and compare flights from Siem Reap to San Francisco that are best for you.

Best time to book a flight from Siem Reap to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Siem Reap with our price prediction graph.

Related info for your journey

Can I find deals for flights from Siem Reap to San Francisco that include hotel bookings?

How can I find direct flights from Siem Reap to San Francisco?

Can I find deals for business class flights from Siem Reap to San Francisco?

Traveling to a place near San Francisco?

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Alternative routes for Siem Reap to San Francisco

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Complete your trip

Complete your trip to San Francisco by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Siem Reap to San Francisco by cabin class

Find flights from Siem Reap to San Francisco, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Siem Reap and San Francisco flights

Browse other Siem Reap and San Francisco flight options. Last updated on September 18, 2026.

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Cheapest flights from Siem Reap to San Francisco
Explore the most affordable flight options available from Siem Reap to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 18, 2026.

Best flights from Siem Reap to San Francisco
Discover carefully curated flight deals from Siem Reap to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 18, 2026.

One-way flights from Siem Reap to San Francisco
Search for one-way flight options from Siem Reap to San Francisco. Find affordable one-way fares based on user searches. Data last updated September 18, 2026.