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Siem Reap

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

SFO — SAI
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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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 December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Popular in

May

Cheapest in

April

Average price

$1,704
Provider with most accurate pricing for San Francisco-Siem Reap–Angkor Intl flight deals.
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Provider most trusted by Cheapflights users for San Francisco-Siem Reap–Angkor Intl flights.
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Highest demand for flights based on searches. 52% potential increase in price ($1,889 potential increase over avg. RT price).
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Cheapest flight prices on average. 50% potential price decrease ($560 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
Trip.comPrice Accuracy2 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
oojoPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on San Francisco-Siem Reap flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

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 December 18, 2025.
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
8.1
Very good
1,413 reviews

Entertainment

8.0

Crew

8.6

Overall

8.1

Boarding

8.3

Food

7.8

Comfort

8.0

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles
Singapore Airlines
8.1
Very good
1,413 reviews
Singapore Airlines
8.1
Very good
1,413 reviews

Entertainment

8.0

Crew

8.6

Overall

8.1

Boarding

8.3

Food

7.8

Comfort

8.0

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles
Vietnam Airlines
7.6
Good
215 reviews
Singapore Airlines
8.1
Very good
1,413 reviews

Entertainment

8.0

Crew

8.6

Overall

8.1

Boarding

8.3

Food

7.8

Comfort

8.0

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles

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 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 $628. Another option worth looking into is Vietnam Airlines, starting at $770 round trip. These flights start at 62% 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 $319 on Singapore Airlines. Other airlines that offer cheap prices include Vietnam Airlines from $331 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.

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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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$628Average$772FlexibilityNo cancel feeOn-time81%
Vietnam AirlinesCheapest$770Average$1,129FlexibilityNo cancel feeOn-time81%

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