$376+ 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 2/19. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SAI
Sep 27 — Oct 41
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from San Francisco to Siem Reap with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from San Francisco to Siem Reap
Cheapest
Best
Last-minute
One-way
Cheapest flights from San Francisco to Siem ReapExplore 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 August 28, 2026.
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 August 28, 2026.
This oojo deal was found by Cheapflights users on 8/24. 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.
Wed 10/1410:50 pm -
1 stop29h 30m
Wed 10/289:30 pm -
1 stop34h 30m
Deal found 8/24![Vietnam Airlines logo]()
$757
This oojo deal was found by Cheapflights users on 8/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/29:40 am -
1 stop39h 20m
Wed 11/1110:45 am -
1 stop36h 05m
Deal found 8/27![Singapore Airlines logo]()
$802
This oojo deal was found by Cheapflights users on 8/28. 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 10/1010:50 pm -
1 stop29h 30m
Sat 10/177:10 pm -
1 stop36h 45m
Deal found 8/28![Vietnam Airlines logo]()
$830
This oojo deal was found by Cheapflights users on 8/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/79:10 pm -
1 stop29h 30m
Wed 11/259:30 pm -
1 stop34h 30m
Deal found 8/26![Vietnam Airlines logo]()
$840
This Vietnam Airlines deal was found by Cheapflights users on 8/28. 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 10/1110:50 pm -
1 stop29h 30m
Fri 10/167:10 pm -
1 stop36h 45m
Deal found 8/28![Vietnam Airlines logo]()
$889
This oojo deal was found by Cheapflights users on 8/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/210:55 pm -
2 stops28h 50m
Wed 11/119:55 am -
2 stops38h 50m
Deal found 8/26![Multiple Airlines logo]()
$923
This oojo deal was found by Cheapflights users on 8/28. 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.
Tue 11/310:55 pm -
2 stops28h 50m
Wed 11/119:55 am -
2 stops26h 00m
Deal found 8/28![Multiple Airlines logo]()
$930
Best flights from San Francisco to Siem ReapDiscover carefully curated flight deals from San Francisco to Siem Reap that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 28, 2026.
Discover carefully curated flight deals from San Francisco to Siem Reap that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 28, 2026.
This oojo deal was found by Cheapflights users on 8/24. 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.
Tue 11/310:56 pm -
3 stops43h 59m
Wed 11/1110:45 am -
3 stops49h 54m
Deal found 8/24![Singapore Airlines logo]()
$1,603
This Qatar Airways deal was found by Cheapflights users on 8/26. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/279:39 am -
3 stops32h 36m
Tue 12/227:30 pm -
2 stops56h 10m
Deal found 8/26![Multiple Airlines logo]()
$1,725
This Qatar Airways deal was found by Cheapflights users on 8/24. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/203:33 pm -
3 stops36h 12m
Sun 11/297:25 pm -
2 stops32h 15m
Deal found 8/24![Qatar Airways logo]()
$1,876
This oojo deal was found by Cheapflights users on 8/23. 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.
Mon 12/219:40 am -
1 stop39h 20m
Tue 1/54:50 pm -
1 stop30h 00m
Deal found 8/23![Singapore Airlines logo]()
$2,769
Last-minute flights from San Francisco to Siem ReapDiscover last-minute flight deals from San Francisco to Siem Reap. Data last updated August 28, 2026 and is based on user searches.
Discover last-minute flight deals from San Francisco to Siem Reap. Data last updated August 28, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 8/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/301:20 am -
2 stops27h 35m
Mon 9/149:40 am -
2 stops27h 35m
Deal found 8/28![Multiple Airlines logo]()
$923
This Trip.com deal was found by Cheapflights users on 8/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3111:45 am -
1 stop31h 55m
Mon 9/1410:30 am -
1 stop37h 20m
Deal found 8/28![Singapore Airlines logo]()
$1,415
This SmartFares deal was found by Cheapflights users on 8/26. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2412:20 am -
2 stops28h 35m
Fri 10/29:40 am -
2 stops27h 00m
Deal found 8/26![Multiple Airlines logo]()
$1,021
This oojo deal was found by Cheapflights users on 8/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2511:45 am -
1 stop31h 55m
Fri 10/24:00 pm -
1 stop31h 50m
Deal found 8/26![Singapore Airlines logo]()
$1,293
This oojo deal was found by Cheapflights users on 8/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2710:50 pm -
1 stop29h 30m
Thu 10/89:35 am -
1 stop22h 20m
Deal found 8/26![Vietnam Airlines logo]()
$957
This CheapOair deal was found by Cheapflights users on 8/26. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/279:05 pm -
3 stops34h 25m
Thu 10/811:50 pm -
3 stops35h 25m
Deal found 8/26![Multiple Airlines logo]()
$2,273
One-way flights from San Francisco to Siem ReapSearch for one-way flight options from San Francisco to Siem Reap. Find affordable one-way fares based on user searches. Data last updated August 28, 2026.
Search for one-way flight options from San Francisco to Siem Reap. Find affordable one-way fares based on user searches. Data last updated August 28, 2026.
This oojo deal was found by Cheapflights users on 8/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/199:40 am -
1 stop39h 20m
Deal found 8/27![Singapore Airlines logo]()
$376
This oojo deal was found by Cheapflights users on 8/25. 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.
Sat 2/209:40 am -
1 stop33h 15m
Deal found 8/25![Singapore Airlines logo]()
$397
This Vietnam Airlines deal was found by Cheapflights users on 8/26. 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 Vietnam Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2310:50 pm -
1 stop29h 30m
Deal found 8/26![Vietnam Airlines logo]()
$468
This oojo deal was found by Cheapflights users on 8/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/610:50 pm -
1 stop29h 30m
Deal found 8/27![Vietnam Airlines logo]()
$479
This oojo deal was found by Cheapflights users on 8/28. 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.
Mon 1/2510:55 pm -
2 stops28h 50m
Deal found 8/28![Multiple Airlines logo]()
$491
This oojo deal was found by Cheapflights users on 8/25. 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.
Mon 11/2310:55 pm -
2 stops28h 50m
Deal found 8/25![Multiple Airlines logo]()
$492
This Justfly.com deal was found by Cheapflights users on 8/28. 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.
Sun 9/610:50 pm -
1 stop29h 30m
Deal found 8/28![Multiple Airlines logo]()
$508
This Kiwi.com deal was found by Cheapflights users on 8/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/229:00 am -
3 stops40h 15m
Deal found 8/26![Multiple Airlines logo]()
$513
This Kiwi.com deal was found by Cheapflights users on 8/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/219:40 am -
2 stops38h 20m
Deal found 8/25![Multiple Airlines logo]()
$520
This Kiwi.com deal was found by Cheapflights users on 8/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2311:20 pm -
2 stops28h 45m
Deal found 8/26![Multiple Airlines logo]()
$524
This Kiwi.com deal was found by Cheapflights users on 8/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2511:00 pm -
2 stops29h 05m
Deal found 8/28![Multiple Airlines logo]()
$525
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 August 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $757 (oojo) |
One-way from | $376 (oojo) |
Popular in | December |
Cheapest in | September |
Average price | $1,185 |
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 7,457,451 searches. Data last updated August 28, 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
Cheapest round-trip
San FranciscoSiem Reap
SFO San Francisco - SAI Siem Reap–Angkor Intl
SFOSAI
San Francisco
Tue 11/3
10:56 pm-9:55 am
3 stops43h 59m
Siem Reap–Angkor Intl
Wed 11/11
10:45 am-9:39 pm
3 stops49h 54m
$1,603
San FranciscoSiem Reap
SFO San Francisco - SAI Siem Reap–Angkor Intl
SFOSAI
San Francisco
Fri 11/27
9:39 am-9:15 am
3 stops32h 36m
Siem Reap–Angkor Intl
Tue 12/22
7:30 pm-12:40 pm
2 stops56h 10m
$1,725
Quickest round-trip
San FranciscoSiem Reap
SFO San Francisco - SAI Siem Reap–Angkor Intl
SFOSAI
San Francisco
Fri 11/20
3:33 pm-6:45 pm
3 stops36h 12m
Siem Reap–Angkor Intl
Sun 11/29
7:25 pm-12:40 pm
2 stops32h 15m
$1,876
San FranciscoSiem Reap
SFO San Francisco - SAI Siem Reap–Angkor Intl
SFOSAI
San Francisco
Mon 12/21
9:40 am-4:00 pm
1 stop39h 20m
Siem Reap–Angkor Intl
Tue 1/5
4:50 pm-7:50 am
1 stop30h 00m
$2,769
Cheapest one-way
San FranciscoSiem Reap
SFO San Francisco - SAI Siem Reap–Angkor Intl
SFOSAI
San Francisco
Fri 2/19
9:40 am-4:00 pm
1 stop39h 20m
$376
San FranciscoSiem Reap
SFO San Francisco - SAI Siem Reap–Angkor Intl
SFOSAI
San Francisco
Thu 9/24
10:50 pm-6:20 pm
1 stop29h 30m
$468
San FranciscoSiem Reap
SFO San Francisco - SAI Siem Reap–Angkor Intl
SFOSAI
San Francisco
Thu 11/5
9:10 pm-5:40 pm
1 stop29h 30m
$468
San FranciscoSiem Reap
SFO San Francisco - SAI Siem Reap–Angkor Intl
SFOSAI
San Francisco
Wed 10/21
10:50 pm-6:20 pm
1 stop29h 30m
$468
San FranciscoSiem Reap
SFO San Francisco - SAI Siem Reap–Angkor Intl
SFOSAI
San Francisco
Mon 11/23
10:55 pm-6:45 pm
2 stops28h 50m
$492
San FranciscoSiem Reap
SFO San Francisco - SAI Siem Reap–Angkor Intl
SFOSAI
San Francisco
Sat 10/31
10:10 pm-5:40 pm
1 stop29h 30m
$508
Showing 1-10 of 14 resultsSorted by cheapest first
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 August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars |
- 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.
SFO-SAI
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 August 28, 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.
Boarding
8.3
Overall
8.2
Crew
8.6
Entertainment
8.1
Food
7.8
Comfort
8.0
Reviews
1 / 20
2.0
MediocreKetan,Nov 2024
SEA - SIN
Boarding
8.3
Overall
8.2
Crew
8.6
Entertainment
8.1
Food
7.8
Comfort
8.0
Reviews
1 / 20
2.0
MediocreKetan,Nov 2024
SEA - SIN
Boarding
8.3
Overall
8.2
Crew
8.6
Entertainment
8.1
Food
7.8
Comfort
8.0
Reviews
1 / 20
2.0
MediocreKetan,Nov 2024
SEA - SIN
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from San Francisco
Popular flights
Alternative routes for San Francisco to Siem Reap
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Siem Reap by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from San Francisco to Siem Reap by cabin class
Find flights from San Francisco to Siem Reap, based on your preferred cabin class, be it economy, premium economy, business, or first class.
San Francisco and Siem Reap flights
Browse other San Francisco and Siem Reap flight options. Last updated on August 28, 2026.
Other flights from San Francisco
Browse through other flights departing from San Francisco. Flights are based on user searches made on Cheapflights and were last updated on August 28, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 7,457,451 searches. Data last updated August 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$599 | Average$847 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$647 | Average$1,222 | FlexibilityNo cancel fee | On-time81% |