$238 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 4/10. 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
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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

Thu, Apr 9 - Wed, Apr 22
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
$530Singapore Airlines
Thu, Apr 9 - Wed, Apr 22
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
$556Singapore Airlines
Thu, Apr 9 - Wed, Apr 22
Multiple Airlines Logo
10:15 am - 9:40 am
SEA
-
SAI
33h 25m
1 stop
Multiple Airlines Logo
4:00 pm - 2:42 pm
SAI
-
SEA
36h 42m
2 stops
$831Multiple Airlines
Thu, Apr 9 - Wed, Apr 22
Multiple Airlines Logo
10:15 am - 9:40 am
SEA
-
SAI
33h 25m
1 stop
Multiple Airlines Logo
4:00 pm - 2:42 pm
SAI
-
SEA
36h 42m
2 stops
$856Multiple Airlines
Sat, Mar 7 - Tue, Apr 7
Multiple Airlines Logo
8:45 am - 3:55 pm
SEA
-
SAI
40h 10m
1 stop
Multiple Airlines Logo
11:50 pm - 9:05 am
SAI
-
SEA
47h 15m
2 stops
$998Multiple Airlines
Wed, Apr 8 - Wed, Apr 22
Multiple Airlines Logo
1:15 am - 6:45 pm
SEA
-
SAI
27h 30m
2 stops
Multiple Airlines Logo
9:40 am - 4:10 pm
SAI
-
SEA
20h 30m
2 stops
$1,001Multiple Airlines
Wed, Apr 8 - Wed, Apr 22
Multiple Airlines Logo
1:30 am - 6:10 pm
SEA
-
SAI
26h 40m
2 stops
Multiple Airlines Logo
7:30 pm - 6:50 pm
SAI
-
SEA
37h 20m
2 stops
$1,017Multiple Airlines
Sat, Mar 7 - Tue, Apr 7
Multiple Airlines Logo
8:45 am - 3:55 pm
SEA
-
SAI
40h 10m
1 stop
Multiple Airlines Logo
11:50 pm - 9:05 am
SAI
-
SEA
47h 15m
3 stops
$1,020Multiple Airlines
Wed, May 20 - Wed, May 27
Singapore Airlines Logo
11:38 am - 9:40 am
SEA
-
SAI
32h 02m
2 stops
Singapore Airlines Logo
4:00 pm - 8:45 am
SAI
-
SEA
30h 45m
1 stop
$1,045Singapore Airlines
Sat, Mar 7 - Tue, Apr 7
Multiple Airlines Logo
11:30 pm - 4:10 pm
SEA
-
SAI
25h 40m
3 stops
Multiple Airlines Logo
12:55 pm - 7:30 pm
SAI
-
SEA
20h 35m
2 stops
$1,065Multiple 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 1463 reviews
8.6Crew
8.0Comfort
8.3Boarding
8.0Entertainment
7.8Food
Airline reviews

Overall were very good and I was satisfied w/ all the food and services.

10.0 ExcellentDulcie, Jan 2026
HKG - SIN
Read more Singapore Airlines reviews

Overall were very good and I was satisfied w/ all the food and services.

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

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

Lounge a access was excellent as was the attentiveness and service from the crew as always. The food and drink supplied were of good quality. The entertainment system had a good selection and I liked the mapping system supplied. However the screen wild have been bigger and the operation a little smoother to navigate. The seats were barely comfortable, but adequate.

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

Very good flight from Boarding to landing -efficient and comfortable with decent entertainment options

Construction at PDX resulting in very lung walk from the rental car to the gate. SFO, extremely long walk between terminals to get to connecting Singapore airlines flight. My smart watch recorded a total of 3 miles.

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

Information on your arrival and departure airports

Seattle (SEA)