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Siem Reap

$306+ Cheap flights from Seattle (SEA) 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SAI
Mar 20 — Mar 271
Fri 3/20
Fri 3/27
1 adult, Economy
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Cheap flight deals from Seattle to Siem Reap

Cheapest flights from Seattle to Siem Reap
Explore the most affordable flight options available from Seattle to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 18, 2026.

This FlightHub deal was found by Cheapflights users on 2/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/910:15 am
SEA
-
SAI
1 stop33h 25m
Singapore Airlines
Wed 4/2210:30 am
SAI
-
SEA
1 stop36h 15m
Singapore Airlines
Deal found 2/15$530
This Gurufare deal was found by Cheapflights users on 2/15. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1910:15 am
SEA
-
SAI
1 stop33h 25m
Singapore Airlines
Wed 6/34:00 pm
SAI
-
SEA
1 stop30h 45m
Singapore Airlines
Deal found 2/15$737
This Justfly.com deal was found by Cheapflights users on 2/16. 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.
Thu 11/268:45 am
SEA
-
SAI
1 stop40h 10m
Singapore Airlines
Wed 12/234:45 pm
SAI
-
SEA
1 stop29h 25m
Singapore Airlines
Deal found 2/16$819
This United Airlines deal was found by Cheapflights users on 2/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/255:05 am
SEA
-
SAI
2 stops37h 45m
United Airlines
Wed 3/1110:45 am
SAI
-
SEA
2 stops43h 29m
United Airlines
Deal found 2/17$833
This United Airlines deal was found by Cheapflights users on 2/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/68:42 am
SEA
-
SAI
2 stops34h 58m
United Airlines
Fri 4/2410:30 am
SAI
-
SEA
2 stops48h 27m
United Airlines
Deal found 2/15$838
This United Airlines deal was found by Cheapflights users on 2/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/47:29 pm
SEA
-
SAI
2 stops53h 26m
United Airlines
Wed 3/1110:45 am
SAI
-
SEA
2 stops48h 13m
United Airlines
Deal found 2/14$840
This Gurufare deal was found by Cheapflights users on 2/15. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2011:38 am
SEA
-
SAI
2 stops32h 02m
Multiple Airlines
Wed 5/2710:30 am
SAI
-
SEA
1 stop36h 15m
Multiple Airlines
Deal found 2/15$851
This Travelocity deal was found by Cheapflights users on 2/16. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/263:40 pm
SEA
-
SAI
2 stops26h 35m
Multiple Airlines
Wed 12/236:40 pm
SAI
-
SEA
2 stops33h 40m
Multiple Airlines
Deal found 2/16$853
This KAYAK deal was found by Cheapflights users on 2/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/911:45 am
SEA
-
SAI
2 stops31h 15m
Multiple Airlines
Wed 4/227:30 pm
SAI
-
SEA
2 stops28h 35m
Multiple Airlines
Deal found 2/15$862
This Expedia deal was found by Cheapflights users on 2/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/263:40 pm
SEA
-
SAI
2 stops26h 35m
Multiple Airlines
Tue 12/296:50 pm
SAI
-
SEA
2 stops33h 30m
Multiple Airlines
Deal found 2/16$895
This FlightHub deal was found by Cheapflights users on 2/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/71:15 am
SEA
-
SAI
2 stops27h 30m
Multiple Airlines
Thu 4/239:40 am
SAI
-
SEA
2 stops20h 30m
Multiple Airlines
Deal found 2/15$905

Find flight deals from Seattle to Siem Reap

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) 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 February 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$530
(FlightHub)

One-way from

$306
(FlightHub)
Provider with most accurate pricing for Seattle/Tacoma Intl-Siem Reap–Angkor Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Siem Reap–Angkor Intl flights.
Search Deals
From Seattle/Tacoma Intl to Siem Reap–Angkor Intl
Search Deals
One-way flight from Seattle/Tacoma Intl to Siem Reap–Angkor Intl
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle 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 2,558,603 searches. Data last updated February 18, 2026.
Use the filters below to find and compare flights from Seattle to Siem Reap that are best for you.

Fly from

Seattle

Fly to

Siem Reap

Route

Depart

Return

Price

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Mon 4/6

8:42 am-9:40 am

2 stops34h 58m

Siem Reap–Angkor Intl

Fri 4/24

10:30 am-8:57 pm

2 stops48h 27m

$838

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Wed 3/4

7:29 pm-3:55 pm

2 stops53h 26m

Siem Reap–Angkor Intl

Wed 3/11

10:45 am-8:58 pm

2 stops48h 13m

$840

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Wed 5/20

11:38 am-9:40 am

2 stops32h 02m

Siem Reap–Angkor Intl

Wed 5/27

10:30 am-8:45 am

1 stop36h 15m

$851

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Tue 5/19

9:02 am-9:40 am

3 stops34h 38m

Siem Reap–Angkor Intl

Wed 6/3

4:00 pm-8:45 am

1 stop30h 45m

$906

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Thu 6/25

10:15 am-9:40 am

1 stop33h 25m

Siem Reap–Angkor Intl

Sun 7/5

10:30 am-8:45 am

1 stop60h 15m

$958

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Mon 5/18

7:08 am-9:40 am

2 stops36h 32m

Siem Reap–Angkor Intl

Wed 6/3

10:30 am-2:30 pm

2 stops42h 00m

$1,049

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Sat 5/16

7:08 am-9:40 am

2 stops36h 32m

Siem Reap–Angkor Intl

Mon 6/1

10:30 am-2:30 pm

2 stops42h 00m

$1,049

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Mon 5/18

7:08 am-9:40 am

2 stops36h 32m

Siem Reap–Angkor Intl

Sun 5/31

10:30 am-11:10 pm

2 stops50h 40m

$1,049

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Mon 5/18

7:08 am-9:40 am

2 stops36h 32m

Siem Reap–Angkor Intl

Mon 6/1

10:30 am-4:20 pm

2 stops43h 50m

$1,049

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Tue 3/3

8:45 am-9:50 am

1 stop34h 05m

$306

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/14

Showing 1-10 of 18 results
1
2

Compare providers for flights from Seattle 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 Seattle to Siem Reap in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Siem Reap flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Siem Reap flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Siem Reap flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-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 Seattle-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 Seattle to Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap from Seattle with our price prediction graph.
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 February 18, 2026.
See what other customers who have flown with Singapore Airlines from Seattle to Siem Reap have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.2
Very good
1,457 reviews

Boarding

8.3

Entertainment

8.0

Food

7.8

Comfort

8.0

Crew

8.6

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Singapore Airlines
8.2
Very good
1,457 reviews
Singapore Airlines
8.2
Very good
1,457 reviews

Boarding

8.3

Entertainment

8.0

Food

7.8

Comfort

8.0

Crew

8.6

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered

Related info for your journey

Find useful and relevant information for your journey from Seattle to Siem Reap. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seattle to Siem Reap?

    Departing from Seattle to Siem Reap will take you 33h 25m. The distance between Seattle and Siem Reap is about 7346 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What is the cheapest airline to fly from Seattle to Siem Reap round-trip?

    Flying on Singapore Airlines is currently your cheapest option to Siem Reap, with prices starting at $523.

  • Can I find deals for flights from Seattle to Siem Reap that include hotel bookings?

    Yes. In addition to deals on Seattle to Siem Reap flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Siem Reap?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Siem Reap.

  • Can I find deals for business class flights from Seattle to Siem Reap?

    Yes. Cheapflights offers flight deals from Seattle to Siem Reap by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Seattle to Siem Reap

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Siem Reap flights

Top airline flying from Seattle to Siem Reap

Discover the top airline that operate flights from Seattle 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 2,558,603 searches. Data last updated February 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$523Average$1,083FlexibilityNo cancel feeOn-time81%

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