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Siem Reap

$364+ Cheap flights from San Francisco (SFO) to Siem Reap

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 7/18. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SAI
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
1 adult, Economy
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Cheap flight deals from San Francisco to Siem Reap

Cheapest flights from San Francisco to Siem Reap
Explore the most affordable flight options available from San Francisco to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 28, 2026.

This FlightHub deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/3011:00 am
SFO
-
SAI
1 stop32h 40m
Singapore Airlines
Thu 5/1410:30 am
SAI
-
SFO
1 stop36h 40m
Singapore Airlines
Deal found 1/26$598
This Justfly.com deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/111:00 am
SFO
-
SAI
1 stop38h 10m
Singapore Airlines
Thu 4/3010:30 am
SAI
-
SFO
1 stop36h 40m
Singapore Airlines
Deal found 1/26$643
This oojo deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:45 am
SFO
-
SAI
1 stop31h 55m
Singapore Airlines
Thu 10/294:45 pm
SAI
-
SFO
1 stop30h 05m
Singapore Airlines
Deal found 1/25$721
This KAYAK deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/612:00 pm
SFO
-
SAI
3 stops42h 10m
China Eastern
Wed 4/159:10 pm
SAI
-
SFO
2 stops25h 55m
China Eastern
Deal found 1/27$737
This Gurufare deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/210:50 pm
SFO
-
SAI
1 stop29h 50m
Vietnam Airlines
Tue 4/147:40 pm
SAI
-
SFO
1 stop36h 15m
Vietnam Airlines
Deal found 1/27$796
This Vietnam Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Vietnam Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/110:50 pm
SFO
-
SAI
1 stop29h 50m
Vietnam Airlines
Wed 4/157:40 pm
SAI
-
SFO
1 stop36h 15m
Vietnam Airlines
Deal found 1/27$797
This Gurufare deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/410:50 pm
SFO
-
SAI
1 stop29h 50m
Vietnam Airlines
Tue 4/147:40 pm
SAI
-
SFO
1 stop36h 15m
Vietnam Airlines
Deal found 1/27$836
This Vietnam Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Vietnam Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/510:50 pm
SFO
-
SAI
1 stop29h 50m
Vietnam Airlines
Wed 4/157:40 pm
SAI
-
SFO
1 stop36h 15m
Vietnam Airlines
Deal found 1/27$837
This KAYAK deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/412:00 pm
SFO
-
SAI
3 stops42h 10m
China Eastern
Wed 4/159:10 pm
SAI
-
SFO
2 stops25h 55m
China Eastern
Deal found 1/27$852

Find flight deals from San Francisco to Siem Reap

Keep the following information in mind while searching for San Francisco to Siem Reap flight deals. Data was last updated January 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$598
(FlightHub)

One-way from

$364
(oojo)

Popular in

May

Cheapest in

April

Average price

$869
Provider with most accurate pricing for San Francisco-Siem Reap–Angkor Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Francisco-Siem Reap–Angkor Intl flights.
Search Deals
From San Francisco to Siem Reap
Search Deals
One-way flight from San Francisco to Siem Reap
Search Deals
Highest demand for flights based on searches. 52% potential increase in price ($1,884 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 49% potential price decrease ($560 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Francisco to Siem Reap that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 28, 2026.
Use the filters below to find and compare flights from San Francisco to Siem Reap that are best for you.

Fly from

San Francisco

Fly to

Siem Reap

Route

Depart

Return

Price

San FranciscoSiem Reap

SFO - SAI

SFOSAI

San Francisco

Wed 4/1

11:00 am-3:10 pm

1 stop38h 10m

Siem Reap–Angkor Intl

Thu 4/30

10:30 am-9:10 am

1 stop36h 40m

$643

San FranciscoSiem Reap

SFO - SAI

SFOSAI

San Francisco

Thu 4/2

10:50 pm-6:40 pm

1 stop29h 50m

Siem Reap–Angkor Intl

Wed 4/15

7:40 pm-5:55 pm

1 stop36h 15m

$797

San FranciscoSiem Reap

SFO - SAI

SFOSAI

San Francisco

Wed 4/1

10:50 pm-6:40 pm

1 stop29h 50m

Siem Reap–Angkor Intl

Wed 4/15

7:40 pm-5:55 pm

1 stop36h 15m

$797

San FranciscoSiem Reap

SFO - SAI

SFOSAI

San Francisco

Sat 4/4

10:50 pm-6:40 pm

1 stop29h 50m

Siem Reap–Angkor Intl

Wed 4/15

7:40 pm-5:55 pm

1 stop36h 15m

$837

San FranciscoSiem Reap

SFO - SAI

SFOSAI

San Francisco

Sun 4/5

10:50 pm-6:40 pm

1 stop29h 50m

Siem Reap–Angkor Intl

Tue 4/14

7:40 pm-5:55 pm

1 stop36h 15m

$837

San FranciscoSiem Reap

SFO - SAI

SFOSAI

San Francisco

Thu 4/30

11:00 am-9:40 am

1 stop32h 40m

Siem Reap–Angkor Intl

Thu 5/14

10:30 am-9:30 am

2 stops37h 00m

$848

San FranciscoSiem Reap

SFO - SAI

SFOSAI

San Francisco

Mon 7/13

11:45 am-3:10 pm

1 stop37h 25m

Siem Reap–Angkor Intl

Sun 7/26

10:30 am-9:50 am

1 stop37h 20m

$918

San FranciscoSiem Reap

SFO - SAI

SFOSAI

San Francisco

Wed 4/1

10:50 pm-6:40 pm

1 stop29h 50m

Siem Reap–Angkor Intl

Thu 4/30

6:05 pm-5:55 pm

2 stops61h 50m

$941

San FranciscoSiem Reap

SFO - SAI

SFOSAI

San Francisco

Thu 7/16

10:50 pm-6:40 pm

1 stop29h 50m

$411

San FranciscoSiem Reap

SFO - SAI

SFOSAI

San Francisco

Sun 3/8

10:10 pm-8:30 pm

1 stop32h 20m

$433

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 17 results
1
2

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

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

Cheapflights Insights

Everything you need to know about your flight from San Francisco to Siem Reap
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Siem Reap

Get insights into the airlines that provide service to Siem Reap. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Siem Reap. Reviews last updated January 28, 2026.
See what other customers who have flown with Singapore Airlines and Vietnam Airlines from San Francisco to Siem Reap have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.2
Very good
1,439 reviews

Food

7.8

Boarding

8.3

Comfort

8.0

Entertainment

8.0

Crew

8.6

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.
Singapore Airlines
8.2
Very good
1,439 reviews
Singapore Airlines
8.2
Very good
1,439 reviews

Food

7.8

Boarding

8.3

Comfort

8.0

Entertainment

8.0

Crew

8.6

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.
Vietnam Airlines
7.6
Good
224 reviews
Singapore Airlines
8.2
Very good
1,439 reviews

Food

7.8

Boarding

8.3

Comfort

8.0

Entertainment

8.0

Crew

8.6

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Siem Reap. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from San Francisco to Siem Reap?

    Most people fly from San Francisco (SFO) if they book a flight from San Francisco to Siem Reap. San Francisco is conveniently located just 11.8 mi from San Francisco’s city center.

  • How long is the flight from San Francisco to Region of Siem Reap?

    Departing from San Francisco to Region of Siem Reap will take you 29h 50m. Airlines will cover a distance of 7791 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from San Francisco to Region of Siem Reap one-way?

    One-way options have recently been found by users for as low as $331 on Vietnam Airlines. Other airlines that offer cheap prices include Singapore Airlines from $332 and United Airlines from $512 one-way.

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

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

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

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

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

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

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Francisco to Siem Reap

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from San Francisco to Siem Reap

Discover the top 2 airlines that operate flights from San Francisco to Siem Reap. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$628Average$756FlexibilityNo cancel feeOn-time81%
Vietnam AirlinesCheapest$770Average$1,129FlexibilityNo cancel feeOn-time81%

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