$538 Find Cheap Flights from Seattle 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 Seattle to Siem Reap departing on 4/27. 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 Seattle 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 Seattle to Siem Reap, as well as popular online travel agencies
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Flight Deals
Useful Info
Flight Deals

Book Cheap Seattle 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 Seattle 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 Seattle to Siem Reap

Tue, Sep 29 - Wed, Oct 28
Singapore Airlines Logo
10:15 am - 9:40 am
SEA
-
SAI
33h 25m
1 stop
Singapore Airlines Logo
10:45 am - 8:10 am
SAI
-
SEA
35h 25m
1 stop
$780Singapore Airlines
Tue, Sep 29 - Mon, Oct 26
Singapore Airlines Logo
10:15 am - 9:40 am
SEA
-
SAI
33h 25m
1 stop
Singapore Airlines Logo
4:45 pm - 8:10 am
SAI
-
SEA
29h 25m
1 stop
$800Singapore Airlines
Thu, Sep 24 - Thu, Oct 8
Singapore Airlines Logo
10:15 am - 9:40 am
SEA
-
SAI
33h 25m
1 stop
Singapore Airlines Logo
10:30 am - 8:45 am
SAI
-
SEA
36h 15m
1 stop
$816Singapore Airlines
Wed, Sep 30 - Wed, Oct 28
Singapore Airlines Logo
5:59 pm - 3:10 pm
SEA
-
SAI
31h 11m
2 stops
Singapore Airlines Logo
4:45 pm - 8:10 am
SAI
-
SEA
29h 25m
1 stop
$830Singapore Airlines
Thu, Oct 1 - Thu, Oct 15
Singapore Airlines Logo
10:15 am - 9:40 am
SEA
-
SAI
57h 25m
1 stop
Singapore Airlines Logo
10:30 am - 8:45 am
SAI
-
SEA
36h 15m
1 stop
$917Singapore Airlines
Wed, Sep 2 - Wed, Sep 16
Singapore Airlines Logo
3:54 pm - 9:40 am
SEA
-
SAI
27h 46m
2 stops
Singapore Airlines Logo
10:30 am - 8:45 am
SAI
-
SEA
36h 15m
1 stop
$929Singapore Airlines
Thu, Oct 1 - Thu, Oct 15
Singapore Airlines Logo
10:15 am - 9:40 am
SEA
-
SAI
33h 25m
1 stop
Singapore Airlines Logo
10:30 am - 9:51 am
SAI
-
SEA
37h 21m
2 stops
$935Singapore Airlines
Thu, Sep 17 - Thu, Oct 8
Singapore Airlines Logo
10:15 am - 9:40 am
SEA
-
SAI
33h 25m
1 stop
Singapore Airlines Logo
10:30 am - 9:51 am
SAI
-
SEA
37h 21m
2 stops
$956Singapore Airlines
Wed, Oct 7 - Wed, Oct 14
Multiple Airlines Logo
4:20 pm - 9:40 am
SEA
-
SAI
27h 20m
2 stops
Multiple Airlines Logo
10:30 am - 8:45 am
SAI
-
SEA
36h 15m
1 stop
$989Multiple Airlines
Thu, Sep 17 - Thu, Oct 8
Singapore Airlines Logo
10:15 am - 9:40 am
SEA
-
SAI
57h 25m
1 stop
Singapore Airlines Logo
10:30 am - 8:45 am
SAI
-
SEA
36h 15m
1 stop
$1,001Singapore Airlines
Useful Info

FAQs - booking Siem Reap flights

  • How does KAYAK find such low prices on flights from Seattle 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 Seattle to Siem Reap.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Seattle 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 Seattle 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 Seattle 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 Seattle 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 Seattle 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 airline flying from Seattle to Siem Reap

 
See real verified KAYAK customer reviews for airlines flying from Seattle 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 Seattle 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 1497 reviews
8.6Crew
8.3Boarding
8.0Entertainment
7.8Food
8.0Comfort
Airline reviews

I had ordered vegetarian food. What I was presented was extremely dissatisfying and not up to the mark. I pretty much did not eat entire 19 hours. For.an airline voted as best in business, it was extremely disappointing. Seats were not comfortable to sleep. Entertainment system didn’t have much choice. WiFi didn’t work for more than half the time. Cabin crew were also difficult to understand. A bit of diversity like Emirates crew would go a long way.

2.0 MediocreGhansham, Apr 2026
EWR - SIN
Read more Singapore Airlines reviews

I had ordered vegetarian food. What I was presented was extremely dissatisfying and not up to the mark. I pretty much did not eat entire 19 hours. For.an airline voted as best in business, it was extremely disappointing. Seats were not comfortable to sleep. Entertainment system didn’t have much choice. WiFi didn’t work for more than half the time. Cabin crew were also difficult to understand. A bit of diversity like Emirates crew would go a long way.

A little more room from the reclining seat in the front of me.

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

Excellent crew service. Professional, courteous. Service with a smile. Good food Very decent flight experience

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 seat don’t have restrictions, can’t fully insert backpack all the way inside.

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

The business class seats were very uncomfortable. When in lie flat position my legs were very restricted.

Everything you need to know for your flight from Seattle to Siem Reap

Information on your arrival and departure airports

Seattle (SEA)