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Cheap flights from San Francisco to Siem Reap from $444

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to Siem Reap departing on 9/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from San Francisco to Siem Reap

Cheap round-trip flights

Enter your travel dates to find the best prices.
Vietnam Airlines Logo
10:50 pm - 6:20 pmSFO  San Francisco-SAI Siem Reap–Angkor Intl
29h 30m1 stop Ho Chi Minh City
Vietnam Airlines Logo
7:10 pm - 5:55 pmSAI  Siem Reap–Angkor Intl-SFO San Francisco
36h 45m1 stop Ho Chi Minh City
$759Vietnam Airlines
Wed, Sep 16 - Wed, Sep 23
Vietnam Airlines Logo
10:10 pm - 8:30 pmSFO  San Francisco-SAI Siem Reap–Angkor Intl
32h 20m1 stop Ho Chi Minh City
Vietnam Airlines Logo
6:40 pm - 5:00 pmSAI  Siem Reap–Angkor Intl-SFO San Francisco
37h 20m1 stop Ho Chi Minh City
$762Vietnam Airlines
Wed, Oct 28 - Tue, Nov 10
Multiple Airlines Logo
12:00 pm - 11:15 amSFO  San Francisco-SAI Siem Reap–Angkor Intl
33h 15m2 stops Shanghai Pu Dong Phnom Penh Techo Intl
Multiple Airlines Logo
9:10 pm - 9:05 amSAI  Siem Reap–Angkor Intl-SFO San Francisco
25h 55m2 stops Kunming Changshui Shanghai Pu Dong
$781Multiple Airlines
Thu, Sep 3 - Wed, Sep 16
Singapore Airlines Logo
9:40 am - 4:00 pmSFO  San Francisco-SAI Siem Reap–Angkor Intl
39h 20m1 stop Singapore Changi
Singapore Airlines Logo
10:45 am - 7:50 amSAI  Siem Reap–Angkor Intl-SFO San Francisco
36h 05m1 stop Singapore Changi
$817Singapore Airlines
Mon, Nov 2 - Wed, Nov 11
Singapore Airlines Logo
9:40 am - 4:00 pmSFO  San Francisco-SAI Siem Reap–Angkor Intl
39h 20m1 stop Singapore Changi
Singapore Airlines Logo
10:45 am - 7:50 amSAI  Siem Reap–Angkor Intl-SFO San Francisco
36h 05m1 stop Singapore Changi
$817Singapore Airlines
Tue, Nov 3 - Wed, Nov 11
Vietnam Airlines Logo
10:50 pm - 6:20 pmSFO  San Francisco-SAI Siem Reap–Angkor Intl
29h 30m1 stop Ho Chi Minh City
Vietnam Airlines Logo
7:10 pm - 5:55 pmSAI  Siem Reap–Angkor Intl-SFO San Francisco
36h 45m1 stop Ho Chi Minh City
$833Vietnam Airlines
Sat, Oct 10 - Sat, Oct 17
Vietnam Airlines Logo
10:50 pm - 6:20 pmSFO  San Francisco-SAI Siem Reap–Angkor Intl
29h 30m1 stop Ho Chi Minh City
Vietnam Airlines Logo
7:10 pm - 5:55 pmSAI  Siem Reap–Angkor Intl-SFO San Francisco
36h 45m1 stop Ho Chi Minh City
$889Vietnam Airlines
Sun, Oct 11 - Fri, Oct 16
Multiple Airlines Logo
10:55 pm - 6:45 pmSFO  San Francisco-SAI Siem Reap–Angkor Intl
28h 50m2 stops Hong Kong Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
9:55 am - 9:45 amSAI  Siem Reap–Angkor Intl-SFO San Francisco
38h 50m2 stops Bangkok Suvarnabhumi Hong Kong Intl
$928Multiple Airlines
Mon, Nov 2 - Wed, Nov 11
Multiple Airlines Logo
10:55 pm - 6:45 pmSFO  San Francisco-SAI Siem Reap–Angkor Intl
28h 50m2 stops Hong Kong Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
9:55 am - 9:15 pmSAI  Siem Reap–Angkor Intl-SFO San Francisco
26h 20m2 stops Bangkok Suvarnabhumi Hong Kong Intl
$928Multiple Airlines
Tue, Nov 3 - Wed, Nov 11
Singapore Airlines Logo
11:45 am - 9:40 amSFO  San Francisco-SAI Siem Reap–Angkor Intl
31h 55m1 stop Singapore Changi
Singapore Airlines Logo
10:30 am - 9:50 amSAI  Siem Reap–Angkor Intl-SFO San Francisco
37h 20m1 stop Singapore Changi
$948Singapore Airlines
Sat, Oct 10 - Sun, Oct 18

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Vietnam Airlines flights from San Francisco to Siem Reap

Our best Vietnam Airlines deals on San Francisco to Siem Reap flight tickets
Vietnam Airlines
Sep 16
SFO10:50 pmSan Francisco
29h 30m
1 stop
SAI6:20 pmSiem Reap–Angkor Intl
Sep 23
SAI7:10 pmSiem Reap–Angkor Intl
36h 45m
1 stop
SFO5:55 pmSan Francisco
$759
Vietnam Airlines
Oct 28
SFO10:10 pmSan Francisco
32h 20m
1 stop
SAI8:30 pmSiem Reap–Angkor Intl
Nov 10
SAI6:40 pmSiem Reap–Angkor Intl
37h 20m
1 stop
SFO5:00 pmSan Francisco
$762
Vietnam Airlines
Oct 10
SFO10:50 pmSan Francisco
29h 30m
1 stop
SAI6:20 pmSiem Reap–Angkor Intl
Oct 17
SAI7:10 pmSiem Reap–Angkor Intl
36h 45m
1 stop
SFO5:55 pmSan Francisco
$833

Singapore Airlines flights from San Francisco to Siem Reap

Our best Singapore Airlines deals on San Francisco to Siem Reap flight tickets
Singapore Airlines
Nov 2
SFO9:40 amSan Francisco
39h 20m
1 stop
SAI4:00 pmSiem Reap–Angkor Intl
Nov 11
SAI10:45 amSiem Reap–Angkor Intl
36h 05m
1 stop
SFO7:50 amSan Francisco
$817
Singapore Airlines
Oct 10
SFO11:45 amSan Francisco
31h 55m
1 stop
SAI9:40 amSiem Reap–Angkor Intl
Oct 18
SAI10:30 amSiem Reap–Angkor Intl
37h 20m
1 stop
SFO9:50 amSan Francisco
$948
Singapore Airlines
Nov 27
SFO9:40 amSan Francisco
33h 15m
1 stop
SAI9:55 amSiem Reap–Angkor Intl
Dec 22
SAI10:45 amSiem Reap–Angkor Intl
36h 05m
1 stop
SFO7:50 amSan Francisco
$988

momondo 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, momondo users made 832,500 searches. Data last updated August 12, 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 San Francisco - SAI Siem Reap–Angkor Intl

SFOSAI

San Francisco

Wed 9/16

10:50 pm-6:20 pm

1 stop29h 30m

Siem Reap–Angkor Intl

Wed 9/23

7:10 pm-5:55 pm

1 stop36h 45m

$759

San FranciscoSiem Reap

SFO San Francisco - SAI Siem Reap–Angkor Intl

SFOSAI

San Francisco

Wed 10/28

10:10 pm-8:30 pm

1 stop32h 20m

Siem Reap–Angkor Intl

Tue 11/10

6:40 pm-5:00 pm

1 stop37h 20m

$762

San FranciscoSiem Reap

SFO San Francisco - SAI Siem Reap–Angkor Intl

SFOSAI

San Francisco

Thu 9/3

12:00 pm-11:15 am

2 stops33h 15m

Siem Reap–Angkor Intl

Wed 9/16

9:10 pm-9:05 am

2 stops25h 55m

$781

San FranciscoSiem Reap

SFO San Francisco - SAI Siem Reap–Angkor Intl

SFOSAI

San Francisco

Mon 11/2

9:40 am-4:00 pm

1 stop39h 20m

Siem Reap–Angkor Intl

Wed 11/11

10:45 am-7:50 am

1 stop36h 05m

$817

San FranciscoSiem Reap

SFO San Francisco - SAI Siem Reap–Angkor Intl

SFOSAI

San Francisco

Tue 11/3

9:40 am-4:00 pm

1 stop39h 20m

Siem Reap–Angkor Intl

Wed 11/11

10:45 am-7:50 am

1 stop36h 05m

$817

San FranciscoSiem Reap

SFO San Francisco - SAI Siem Reap–Angkor Intl

SFOSAI

San Francisco

Sat 10/10

10:50 pm-6:20 pm

1 stop29h 30m

Siem Reap–Angkor Intl

Sat 10/17

7:10 pm-5:55 pm

1 stop36h 45m

$833

San FranciscoSiem Reap

SFO San Francisco - SAI Siem Reap–Angkor Intl

SFOSAI

San Francisco

Sun 10/11

10:50 pm-6:20 pm

1 stop29h 30m

Siem Reap–Angkor Intl

Fri 10/16

7:10 pm-5:55 pm

1 stop36h 45m

$889

San FranciscoSiem Reap

SFO San Francisco - SAI Siem Reap–Angkor Intl

SFOSAI

San Francisco

Mon 11/2

10:55 pm-6:45 pm

2 stops28h 50m

Siem Reap–Angkor Intl

Wed 11/11

9:55 am-9:45 am

2 stops38h 50m

$928
Quickest round-trip

San FranciscoSiem Reap

SFO San Francisco - SAI Siem Reap–Angkor Intl

SFOSAI

San Francisco

Tue 11/3

10:55 pm-6:45 pm

2 stops28h 50m

Siem Reap–Angkor Intl

Wed 11/11

9:55 am-9:15 pm

2 stops26h 20m

$928

San FranciscoSiem Reap

SFO San Francisco - SAI Siem Reap–Angkor Intl

SFOSAI

San Francisco

Sat 10/10

11:45 am-9:40 am

1 stop31h 55m

Siem Reap–Angkor Intl

Sun 10/18

10:30 am-9:50 am

1 stop37h 20m

$948

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Siem Reap from

How to get the cheapest flight ticket from San Francisco to Siem Reap

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Siem Reap?

If you don’t want to visit Siem Reap in July, then you should wait until June to fly from San Francisco, when ticket prices are also cheap, with an average price of $0.

How have San Francisco to Siem Reap flight prices changed over time?

As of August 2026, prices for San Francisco to Siem Reap flights are approximately 7% more expensive when compared to flights at the same time last year.

When to book flights from San Francisco to Siem Reap

Are you open to changing your travel dates? Check out the ideal times to fly from San Francisco to Siem Reap according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap San Francisco to Siem Reap (SFO to SAI) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to Siem Reap

Fastest flight time

27h 30m

Direct flights

None
The fastest flight from San Francisco to Siem Reap takes 27h 30m
There are no direct flights from San Francisco to Siem Reap. There are no popular flight routes from San Francisco to Siem Reap.
Search flight deals

Frequently asked questions about flying from San Francisco to Siem Reap

  • How far is San Francisco to Siem Reap–Angkor Intl by plane?

    A flight from San Francisco to Siem Reap–Angkor Intl will travel around 7799.7 mi. A reasonable flight in good conditions will take 27h 30m.

  • When did momondo last update prices for flights from San Francisco Airport to Siem Reap–Angkor Intl Airport?

    Prices for flights from San Francisco Airport to Siem Reap–Angkor Intl Airport were last updated today.

  • How many operators does momondo search for flights from San Francisco Airport to Siem Reap–Angkor Intl Airport?

  • How old do you have to be to fly from San Francisco Airport to Siem Reap–Angkor Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Francisco Airport to Siem Reap–Angkor Intl Airport.

  • What documentation or ID do you need to fly to Siem Reap–Angkor Intl Airport?

    The necessary travel and health documents for your Siem Reap–Angkor Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from San Francisco to Siem Reap?

Best airlines flying from San Francisco to Siem Reap

Compare and see reviews for airlines that fly from San Francisco to Siem Reap with momondo
Airline
Rating
Free Cancellation
Price
Singapore AirlinesPriceFrom $599Free CancellationRating
8.2
1,584 reviews
Search Singapore Airlines flights
Vietnam AirlinesPriceFrom $647Free CancellationRating
7.7
284 reviews
Search Vietnam Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to Siem Reap?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from San Francisco to Siem Reap. momondo saves you time and could save you money on your trip.

Can I find flights from San Francisco to Siem Reap with flexible booking policies on momondo?

Yes. All flights to Siem Reap from San Francisco on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from San Francisco to Siem Reap?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Siem Reap from San Francisco.

I’m not ready to book a flight from San Francisco to Siem Reap right now. Can momondo alert me if prices change?

If you are not ready to book a flight from San Francisco to Siem Reap now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Siem Reap and let you know when they change.

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