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Siem Reap

$315+ Cheap flights from San Francisco (SFO) to Siem Reap, Cambodia (SAI)

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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SAI
May 3 — May 101
Sun 5/3
Sun 5/10
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 April 3, 2026.

This Expedia deal was found by Cheapflights users on 4/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/61:00 pm
SFO
-
SAI
2 stops30h 05m
Multiple Airlines
Thu 6/1112:55 pm
SAI
-
SFO
2 stops24h 20m
Multiple Airlines
Deal found 4/1$1,002
This KAYAK deal was found by Cheapflights users on 4/3. 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 4/2712:20 am
SFO
-
SAI
2 stops28h 25m
Multiple Airlines
Fri 5/81:05 pm
SAI
-
SFO
2 stops23h 35m
Multiple Airlines
Deal found 4/3$1,004
This oojo deal was found by Cheapflights users on 3/30. 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.
Sat 5/210:50 pm
SFO
-
SAI
1 stop29h 30m
Vietnam Airlines
Sat 11/289:30 pm
SAI
-
SFO
1 stop34h 30m
Vietnam Airlines
Deal found 3/30$1,017
This KAYAK deal was found by Cheapflights users on 4/1. 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.
Wed 5/610:25 am
SFO
-
SAI
1 stop38h 45m
Singapore Airlines
Thu 6/1110:30 am
SAI
-
SFO
1 stop24h 50m
Singapore Airlines
Deal found 4/1$1,065
This oojo deal was found by Cheapflights users on 4/2. 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.
Sat 4/251:00 pm
SFO
-
SAI
2 stops30h 05m
Multiple Airlines
Sun 5/39:45 am
SAI
-
SFO
2 stops26h 55m
Multiple Airlines
Deal found 4/2$1,092
This Justfly.com deal was found by Cheapflights users on 3/30. 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.
Sat 5/212:30 pm
SFO
-
SAI
2 stops30h 35m
Multiple Airlines
Sat 11/281:20 pm
SAI
-
SFO
2 stops32h 20m
Multiple Airlines
Deal found 3/30$1,148
This Expedia deal was found by Cheapflights users on 4/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2512:20 am
SFO
-
SAI
2 stops28h 25m
Multiple Airlines
Sat 5/21:05 pm
SAI
-
SFO
2 stops47h 35m
Multiple Airlines
Deal found 4/3$1,153
This BusinessClass deal was found by Cheapflights users on 3/29. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/319:40 am
SFO
-
SAI
1 stop33h 10m
Singapore Airlines
Thu 1/1410:45 am
SAI
-
SFO
1 stop22h 50m
Singapore Airlines
Deal found 3/29$1,208

Find flight deals from San Francisco to Siem Reap

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Siem Reap (SAI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,002
(Expedia)

One-way from

$315
(oojo)

Popular in

May

Cheapest in

September

Average price

$690
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–Angkor Intl
Search Deals
One-way flight from San Francisco to Siem Reap–Angkor Intl
Search Deals
Highest demand for flights based on searches. 53% potential increase in price ($1,962 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 49% potential price decrease ($559 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 3, 2026.
Use the filters below to find and compare flights from San Francisco to Siem Reap that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoSiem Reap

SFO - SAI

SFOSAI

San Francisco

Wed 5/6

1:00 pm-9:05 am

2 stops30h 05m

Siem Reap–Angkor Intl

Thu 6/11

12:55 pm-11:15 pm

2 stops24h 20m

$1,002

San FranciscoSiem Reap

SFO - SAI

SFOSAI

San Francisco

Sat 5/2

10:50 pm-5:10 pm

2 stops28h 20m

Siem Reap–Angkor Intl

Sat 11/28

9:30 pm-5:00 pm

1 stop34h 30m

$1,142

San FranciscoSiem Reap

SFO - SAI

SFOSAI

San Francisco

Sat 5/2

12:30 pm-9:05 am

2 stops30h 35m

Siem Reap–Angkor Intl

Sat 11/28

1:20 pm-6:40 am

2 stops32h 20m

$1,148

San FranciscoSiem Reap

SFO - SAI

SFOSAI

San Francisco

Sat 4/25

12:20 am-6:45 pm

2 stops28h 25m

Siem Reap–Angkor Intl

Sat 5/2

1:05 pm-10:40 pm

2 stops47h 35m

$1,153
Quickest round-trip

San FranciscoSiem Reap

SFO - SAI

SFOSAI

San Francisco

Sat 4/25

10:50 pm-6:20 pm

1 stop29h 30m

Siem Reap–Angkor Intl

Sun 5/3

9:35 am-5:55 pm

1 stop22h 20m

$1,354

San FranciscoSiem Reap

SFO - SAI

SFOSAI

San Francisco

Fri 8/14

5:05 pm-12:15 pm

2 stops29h 10m

Siem Reap–Angkor Intl

Sat 8/22

11:50 pm-2:00 pm

2 stops52h 10m

$1,503

San FranciscoSiem Reap

SFO - SAI

SFOSAI

San Francisco

Sun 5/24

10:50 pm-6:20 pm

1 stop29h 30m

Siem Reap–Angkor Intl

Mon 6/22

6:05 pm-5:55 pm

2 stops61h 50m

$1,550

San FranciscoSiem Reap

SFO - SAI

SFOSAI

San Francisco

Wed 7/1

10:50 pm-6:20 pm

1 stop29h 30m

Siem Reap–Angkor Intl

Fri 7/10

7:10 pm-7:20 am

2 stops26h 10m

$1,561

San FranciscoSiem Reap

SFO - SAI

SFOSAI

San Francisco

Mon 7/6

1:00 am-6:20 pm

2 stops27h 20m

Siem Reap–Angkor Intl

Fri 7/31

7:10 pm-5:55 pm

1 stop36h 45m

$1,577
Cheapest one-way

San FranciscoSiem Reap

SFO - SAI

SFOSAI

San Francisco

Sun 8/16

5:15 pm-6:05 pm

2 stops34h 50m

$482

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/3

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

Compare providers for flights from San Francisco to Siem Reap

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Francisco to Siem Reap in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
Trip.comPrice Accuracy1 starTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on San Francisco-Siem Reap flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Francisco-Siem Reap flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Francisco-Siem Reap flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Francisco-Siem Reap flights, Cheapflights users trust FlightHub the most. FlightHub 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 San Francisco-Siem Reap 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 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

How much does it cost to fly round-trip from San Francisco to Siem Reap?

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 April 3, 2026.
Peruse reviews from past customers who have flown with Singapore Airlines and Vietnam Airlines from San Francisco to Siem Reap to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.2
Very good
1,488 reviews

Comfort

8.0

Overall

8.2

Crew

8.6

Boarding

8.3

Entertainment

8.0

Food

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2026

SAI - SIN

The only issue we had was seat selection. Was not easy to change, after they assigned seats. Also, the premium economy seats, are nothing special.. All and all safe flight with minor back issues.
Singapore Airlines
8.2
Very good
1,488 reviews
Singapore Airlines
8.2
Very good
1,488 reviews

Comfort

8.0

Overall

8.2

Crew

8.6

Boarding

8.3

Entertainment

8.0

Food

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2026

SAI - SIN

The only issue we had was seat selection. Was not easy to change, after they assigned seats. Also, the premium economy seats, are nothing special.. All and all safe flight with minor back issues.
Vietnam Airlines
7.7
Good
252 reviews
Singapore Airlines
8.2
Very good
1,488 reviews

Comfort

8.0

Overall

8.2

Crew

8.6

Boarding

8.3

Entertainment

8.0

Food

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2026

SAI - SIN

The only issue we had was seat selection. Was not easy to change, after they assigned seats. Also, the premium economy seats, are nothing special.. All and all safe flight with minor back issues.

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.

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

    Airlines like Vietnam Airlines fly from San Francisco to Siem Reap in about 28h 20m. The time it takes to get you to your destination can typically vary by up to . San Francisco and Siem Reap are separated by a distance of 7791 mi.

  • What are the cheapest airlines flying from San Francisco to Siem Reap round-trip?

    Flying on Singapore Airlines is currently your cheapest option to Siem Reap, with prices starting at $599. Another option worth looking into is Vietnam Airlines, starting at $647 round trip. These flights start at 64% lower than the current average price 3 months from now.

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

    One-way options have recently been found by users for as low as $248 on Singapore Airlines. Other airlines that offer cheap prices include Vietnam Airlines from $319 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

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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.
Los Angeles to Siem Reap flights
Ontario to Siem Reap flights

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 April 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$599Average$778FlexibilityNo cancel feeOn-time81%
Vietnam AirlinesCheapest$647Average$946FlexibilityNo cancel feeOn-time81%

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