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 August 4, 2026.

Fri 12/181:20 pm

SAI

SFO

2 stops20h 20m

Multiple Airlines

Mon 12/2812:00 pm

SFO

SAI

2 stops30h 15m

Multiple Airlines

Deal found 8/1

$1,060

Fri 12/1810:45 am

SAI

SFO

1 stop36h 05m

Singapore Airlines

Mon 12/289:40 am

SFO

SAI

1 stop33h 10m

Singapore Airlines

Deal found 7/31

$1,404

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 August 4, 2026.

Fri 12/49:30 pm

SAI

SFO

1 stop34h 30m

Vietnam Airlines

Deal found 8/1

$500

Sat 11/289:30 pm

SAI

SFO

1 stop34h 30m

Vietnam Airlines

Deal found 7/30

$505

Sat 12/127:05 pm

SAI

SFO

2 stops33h 15m

Multiple Airlines

Deal found 7/31

$529

Tue 1/129:30 pm

SAI

SFO

1 stop34h 30m

Vietnam Airlines

Deal found 8/3

$563

Sun 12/67:05 pm

SAI

SFO

3 stops39h 35m

Multiple Airlines

Deal found 7/31

$568

Mon 9/147:05 pm

SAI

SFO

3 stops39h 35m

Multiple Airlines

Deal found 8/3

$579

Sat 11/2810:00 am

SAI

SFO

1 stop22h 00m

Multiple Airlines

Deal found 8/3

$616

Tue 1/127:05 pm

SAI

SFO

2 stops33h 15m

Multiple Airlines

Deal found 8/3

$662

Sun 11/299:30 pm

SAI

SFO

2 stops24h 10m

Multiple Airlines

Deal found 7/30

$669

Find flight deals from Siem Reap to San Francisco

Most accurate provider	Expedia 1 star
Most trusted provider	Expedia 3 stars
Round-trip from	$1,060 (oojo)
One-way from	$500 (Mytrip)

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

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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.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

Siem ReapSan Francisco

SAI - SFO

SAISFO

Siem Reap–Angkor Intl

Fri 12/18

1:20 pm-6:40 pm

2 stops20h 20m

San Francisco

Mon 12/28

12:00 pm-9:15 am

2 stops30h 15m

$1,060

Siem ReapSan Francisco

SAI - SFO

SAISFO

Siem Reap–Angkor Intl

Fri 12/18

10:45 am-7:50 am

1 stop36h 05m

San Francisco

Mon 12/28

9:40 am-9:50 am

1 stop33h 10m

$1,404

Cheapest one-way

Siem ReapSan Francisco

SAI - SFO

SAISFO

Siem Reap–Angkor Intl

Sat 12/12

6:40 pm-5:00 pm

1 stop37h 20m

$500

Siem ReapSan Francisco

SAI - SFO

SAISFO

Siem Reap–Angkor Intl

Sat 11/28

9:30 pm-5:00 pm

1 stop34h 30m

$505

Siem ReapSan Francisco

SAI - SFO

SAISFO

Siem Reap–Angkor Intl

Sat 1/23

9:30 pm-5:00 pm

1 stop34h 30m

$563

Siem ReapSan Francisco

SAI - SFO

SAISFO

Siem Reap–Angkor Intl

Sun 12/6

9:55 am-7:10 pm

2 stops24h 15m

$568

Siem ReapSan Francisco

SAI - SFO

SAISFO

Siem Reap–Angkor Intl

Tue 1/12

6:50 pm-5:00 pm

1 stop37h 10m

$610

Siem ReapSan Francisco

SAI - SFO

SAISFO

Siem Reap–Angkor Intl

Mon 1/11

5:05 pm-5:00 pm

3 stops62h 55m

$747

Quickest one-way

Siem ReapSan Francisco

SAI - SFO

SAISFO

Siem Reap–Angkor Intl

Sun 11/29

10:00 am-5:00 pm

1 stop22h 00m

$793

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Sorted 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.

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San Bruno

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Burlingame

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Vallejo

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Davis

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

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/4. 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 August 4, 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 August 4, 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 August 4, 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 August 4, 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 August 4, 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 August 4, 2026.

Find flight deals from Siem Reap to San Francisco

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Most trusted provider

Round-trip from

One-way from

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?

Browse thousands of different options on Cheapflights for your next trip

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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 August 4, 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 August 4, 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 August 4, 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 August 4, 2026.