$316 Find Cheap Flights from San Francisco to Siem Reap

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Siem Reap departing on 9/6. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Siem Reap

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Siem Reap, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Siem Reap, as well as popular online travel agencies
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Flight Deals

Book Cheap San Francisco to Siem Reap Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to Siem Reap that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Francisco to Siem Reap

Sun, Sep 6 - Wed, Sep 9
Singapore Airlines Logo
11:45 am - 9:40 am
SFO
-
SAI
31h 55m
1 stop
Singapore Airlines Logo
10:30 am - 9:50 am
SAI
-
SFO
37h 20m
1 stop
$583Singapore Airlines
Tue, Sep 1 - Thu, Oct 1
Singapore Airlines Logo
11:45 am - 9:40 am
SFO
-
SAI
31h 55m
1 stop
Singapore Airlines Logo
10:30 am - 9:50 am
SAI
-
SFO
37h 20m
1 stop
$745Singapore Airlines
Mon, Aug 31 - Mon, Sep 28
Singapore Airlines Logo
11:45 am - 9:40 am
SFO
-
SAI
31h 55m
1 stop
Singapore Airlines Logo
10:30 am - 9:50 am
SAI
-
SFO
37h 20m
1 stop
$765Singapore Airlines
Sun, Aug 30 - Wed, Sep 30
Singapore Airlines Logo
11:45 am - 9:40 am
SFO
-
SAI
31h 55m
1 stop
Singapore Airlines Logo
10:30 am - 9:50 am
SAI
-
SFO
37h 20m
1 stop
$784Singapore Airlines
Mon, Aug 10 - Sat, Aug 22
Singapore Airlines Logo
11:45 am - 9:40 am
SFO
-
SAI
31h 55m
1 stop
Singapore Airlines Logo
10:30 am - 9:50 am
SAI
-
SFO
37h 20m
1 stop
$829Singapore Airlines
Sun, Sep 6 - Wed, Sep 9
Singapore Airlines Logo
4:55 pm - 9:40 am
SFO
-
SAI
26h 45m
2 stops
Singapore Airlines Logo
4:00 pm - 9:50 am
SAI
-
SFO
31h 50m
1 stop
$844Singapore Airlines
Wed, Apr 22 - Sat, May 2
Vietnam Airlines Logo
10:50 pm - 6:20 pm
SFO
-
SAI
29h 30m
1 stop
Vietnam Airlines Logo
7:10 pm - 5:55 pm
SAI
-
SFO
36h 45m
1 stop
$911Vietnam Airlines
Mon, Aug 10 - Sat, Aug 22
Singapore Airlines Logo
11:45 am - 3:10 pm
SFO
-
SAI
37h 25m
1 stop
Singapore Airlines Logo
10:30 am - 9:00 am
SAI
-
SFO
36h 30m
2 stops
$937Singapore Airlines
Mon, Aug 31 - Mon, Sep 28
United Airlines Logo
10:55 am - 9:40 am
SFO
-
SAI
32h 45m
2 stops
United Airlines Logo
10:30 am - 9:15 am
SAI
-
SFO
36h 45m
1 stop
$959United Airlines
Wed, Sep 2 - Wed, Sep 30
United Airlines Logo
12:25 pm - 9:40 am
SFO
-
SAI
31h 15m
2 stops
United Airlines Logo
10:30 am - 9:15 am
SAI
-
SFO
36h 45m
1 stop
$962United Airlines
Booking Insights

KAYAK's insights & trends for San Francisco to Siem Reap flights

Get data-powered insights and trends into flights from San Francisco to Siem Reap to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from San Francisco to Siem Reap?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from San Francisco to Siem Reap were found on Vietnam Airlines ($937) and United Airlines ($1,000).

Good to know

Low seasonSeptember
Best time to beat the crowds with an average 61% drop in price.
Most popular time to fly with an average 327% increase in price.

FAQs - booking Siem Reap flights

  • How does KAYAK find such low prices on flights from San Francisco to Siem Reap?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from San Francisco to Siem Reap.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Francisco to Siem Reap?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from San Francisco to Siem Reap is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from San Francisco to Siem Reap?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from San Francisco to Siem Reap with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Francisco to Siem Reap?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from San Francisco to Siem Reap up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from San Francisco to Siem Reap

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to Siem Reap. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from San Francisco to Siem Reap? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.2
Singapore AirlinesOverall score based on 1483 reviews
8.3Boarding
7.8Food
8.6Crew
8.0Entertainment
8.0Comfort
Airline reviews

They ran out of the second choice of food was stuck with fish

4.0 OkayOscar, Mar 2026
LAX - NRT
Read more Singapore Airlines reviews

They ran out of the second choice of food was stuck with fish

First time flying with Singapore airlines and I’ll give them two thumbs up 👍 👍

I wish there was a little more leg room between the seats. The recline was good and seats overall were comfortable. I also didn’t like the 2-4-2 configuration.

toilets could be cleaned more frequently, everything else was pretty good.

The flight crew was phenominal! We couldn't have asked for any better. They were experienced professionals.

Wish the underseat compartment don’t have a restriction, can fit a personal item such as backpack fully like most Boeing

Airline should consider adding a small meal at the last leg of the flight, right now there is 7 hours of no meal break.

Crew and service excellent. 2 hour delay for takeoff. SQ app showed flight on time.

Headwind delayed our flight which wasn’t the airlines fault

The food wasn’t good at all. I skipped meals .

flight departure was late, with no updates on status of departure

The aircraft was little tired but the food and service was outstanding

It was ok, it felt more like an internal flight than an international flight so I guess expected a slightly better standard. Nothing really wrong with it but there was no inflight entertainment. Food and service was good.

This was our fourth domestic flight with Vietnam Airlines, and once again we found the experience very suitable. Check-in was easy and efficient. They did take our carry-on luggage, but that was fine. I’m actually happy not to deal with it on such a short flight. The flight was just over an hour, departed on time, and we climbed above the clouds into a beautiful sunset. Even on such a short flight, they served water, which we appreciated. Luggage came out into carousel in Nha Trang in good time and off we went to meet our GRAB. Also, Vietnam Airlines have easy to locate ground level offices in cities and towns where you can get assistance with staff. I liked this service as we did go visit one in Nha Trang. We would definitely recommend Vietnam Airlines and wouldn’t hesitate to fly with them again.

Really good 👍 This was our first time flying with Vietnam Airlines. It was a short domestic flight, so no meal service, but boarding was organized and the flight departed and arrived on schedule. The flight attendants were professional and neatly presented. All in all, a very good first experience. We would recommend Vietnam Airlines.

We flew with their partner VESCO on a small plane, it was a really good flight. There was no food or entertainment as it’s a one hour hopper flight.

The flight boarded and departed pretty much on time as it’s just a one hour flight there is no food or entertainment so I marked that at the neutral but they do offer water and I’m sure if you needed some food you could bring your own onboard. This was our third internal flight with Vietnam Airways and I recommend them.

This is a very short commuter flight, so there is no food or flight entertainment. Hence, I marked it in the neutral flight left on time. The plane was full pretty much and it was a pretty easy flight overall very good.

The flight crew and attendants are very professional and polite.

Food and welcome services were good , however we experienced issues with the entertainment system and poor headsets

Everything you need to know for your flight from San Francisco to Siem Reap

Information on your arrival and departure airports