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Siem Reap

$277+ Cheap flights from Seattle (SEA) to Siem Reap

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
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
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 January 27, 2026.

This FlightHub deal was found by Cheapflights users on 1/26. 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 5/1910:15 am
SEA
-
SAI
1 stop33h 25m
Singapore Airlines
Wed 6/310:30 am
SAI
-
SEA
1 stop36h 15m
Singapore Airlines
Deal found 1/26$516
This FlightHub deal was found by Cheapflights users on 1/27. 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.
Fri 5/2210:15 am
SEA
-
SAI
1 stop38h 55m
Singapore Airlines
Sat 6/610:30 am
SAI
-
SEA
1 stop36h 15m
Singapore Airlines
Deal found 1/27$540
This FlightHub deal was found by Cheapflights users on 1/25. 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.
Sun 4/1910:15 am
SEA
-
SAI
1 stop33h 25m
Singapore Airlines
Thu 4/3010:30 am
SAI
-
SEA
1 stop36h 15m
Singapore Airlines
Deal found 1/25$616
This oojo deal was found by Cheapflights users on 1/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/206:49 pm
SEA
-
SAI
2 stops30h 21m
Singapore Airlines
Wed 5/2710:30 am
SAI
-
SEA
1 stop36h 15m
Singapore Airlines
Deal found 1/26$733
This Justfly.com deal was found by Cheapflights users on 1/25. 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 4/2310:15 am
SEA
-
SAI
1 stop33h 25m
Singapore Airlines
Fri 5/14:00 pm
SAI
-
SEA
1 stop30h 45m
Singapore Airlines
Deal found 1/25$763
This oojo deal was found by Cheapflights users on 1/25. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/16:59 pm
SEA
-
SAI
2 stops30h 11m
Singapore Airlines
Fri 4/1010:30 am
SAI
-
SEA
1 stop36h 15m
Singapore Airlines
Deal found 1/25$784
This FlightHub deal was found by Cheapflights users on 1/26. 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.
Fri 6/2610:15 am
SEA
-
SAI
1 stop38h 55m
Singapore Airlines
Sat 7/1110:30 am
SAI
-
SEA
1 stop36h 15m
Singapore Airlines
Deal found 1/26$813
This United Airlines deal was found by Cheapflights users on 1/27. 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 4/65:45 pm
SEA
-
SAI
2 stops25h 55m
United Airlines
Wed 4/1510:30 am
SAI
-
SEA
2 stops38h 09m
United Airlines
Deal found 1/27$838
This United Airlines deal was found by Cheapflights users on 1/26. 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 2/257:29 pm
SEA
-
SAI
2 stops53h 26m
United Airlines
Wed 3/1110:45 am
SAI
-
SEA
2 stops43h 29m
United Airlines
Deal found 1/26$839
This United Airlines deal was found by Cheapflights users on 1/27. 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.
Sun 4/55:45 pm
SEA
-
SAI
2 stops49h 55m
United Airlines
Sun 4/1210:30 am
SAI
-
SEA
2 stops50h 57m
United Airlines
Deal found 1/27$844

Find flight deals from Seattle to Siem Reap

Keep the following information in mind while searching for Seattle to Siem Reap flight deals. Data was last updated January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$516
(FlightHub)

One-way from

$277
(oojo)
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
Search Deals
One-way flight from Seattle/Tacoma Intl to Siem Reap
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 January 27, 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

Tue 5/19

10:15 am-9:40 am

1 stop33h 25m

Siem Reap–Angkor Intl

Wed 6/3

10:30 am-8:45 am

1 stop36h 15m

$516

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Mon 4/6

5:45 pm-9:40 am

2 stops25h 55m

Siem Reap–Angkor Intl

Wed 4/15

10:30 am-10:39 am

2 stops38h 09m

$838

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Wed 2/25

5:20 pm-3:55 pm

2 stops55h 35m

Siem Reap–Angkor Intl

Wed 3/11

10:45 am-4:14 pm

2 stops43h 29m

$839

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Sun 4/5

5:45 pm-9:40 am

2 stops49h 55m

Siem Reap–Angkor Intl

Sun 4/12

10:30 am-11:27 pm

2 stops50h 57m

$844

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Sun 4/5

5:45 pm-9:40 am

2 stops49h 55m

Siem Reap–Angkor Intl

Wed 4/15

10:30 am-10:39 am

2 stops38h 09m

$844

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Wed 5/20

6:49 pm-3:10 pm

2 stops30h 21m

Siem Reap–Angkor Intl

Wed 5/27

10:30 am-8:57 am

2 stops36h 27m

$948

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Fri 6/26

6:58 pm-3:10 pm

2 stops30h 12m

Siem Reap–Angkor Intl

Sat 7/11

10:30 am-8:45 am

1 stop36h 15m

$974

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Thu 4/2

8:42 am-9:40 am

2 stops58h 58m

Siem Reap–Angkor Intl

Wed 4/15

10:30 am-8:57 pm

2 stops48h 27m

$1,016

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Tue 3/3

8:45 am-9:50 am

1 stop34h 05m

$277

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Tue 3/3

3:45 pm-9:15 am

2 stops26h 30m

$421

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/25

Showing 1-10 of 12 results
1
2

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.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Siem Reap
No data available for this route at this time. Please check back soon.

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 January 27, 2026.
Get a feel of what it's like to fly with Singapore Airlines from Seattle to Siem Reap by reading reviews from past customers. 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
1,439 reviews

Overall

8.2

Food

7.8

Crew

8.6

Entertainment

8.0

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Singapore Airlines
8.2
Very good
1,439 reviews
Singapore Airlines
8.2
Very good
1,439 reviews

Overall

8.2

Food

7.8

Crew

8.6

Entertainment

8.0

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.

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.

  • What airport do you fly from for flights from Seattle to Siem Reap?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly out of when you book flights from Seattle to Siem Reap.

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

    Singapore Airlines and United Airlines can get you from Seattle to Region of Siem Reap in just under 25h 55m. Your travel time can differ by up to 7h 30m. Seattle and Region of Siem Reap are separated by a distance of 7346 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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

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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.
Seattle to Phnom Penh flights
Seattle to Siem Reap flights
Spokane to Phnom Penh flights
Portland to Phnom Penh flights
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 January 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$523Average$1,083FlexibilityNo cancel feeOn-time81%

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