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Siem Reap

$277+ Cheap flights from Washington 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
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from Washington to Siem Reap

Cheapest flights from Washington to Siem Reap
Explore the most affordable flight options available from Washington to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.

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 oojo 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 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 1/27$733
This oojo deal was found by Cheapflights users on 1/28. 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.
Fri 5/2210:15 am
SEA
-
SAI
1 stop38h 55m
Singapore Airlines
Sun 5/3110:30 am
SAI
-
SEA
2 stops36h 27m
Singapore Airlines
Deal found 1/28$739
This FlightHub deal was found by Cheapflights users on 1/29. 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 1/29$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 4/611:35 am
SEA
-
SAI
2 stops32h 05m
United Airlines
Sun 4/1210:30 am
SAI
-
SEA
2 stops50h 57m
United Airlines
Deal found 1/27$838
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.
Wed 2/2512:32 pm
SEA
-
SAI
2 stops60h 23m
United Airlines
Wed 3/1110:45 am
SAI
-
SEA
2 stops43h 29m
United Airlines
Deal found 1/27$840
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 4/57:37 pm
SEA
-
SAI
2 stops48h 03m
United Airlines
Wed 4/1510:30 am
SAI
-
SEA
2 stops46h 05m
United Airlines
Deal found 1/27$844
This Justfly.com 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/310:15 am
SEA
-
SAI
1 stop33h 25m
Singapore Airlines
Sat 4/1810:30 am
SAI
-
SEA
1 stop36h 15m
Singapore Airlines
Deal found 1/27$855
This Justfly.com 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/310:15 am
SEA
-
SAI
1 stop33h 25m
Singapore Airlines
Mon 4/1310:30 am
SAI
-
SEA
1 stop36h 15m
Singapore Airlines
Deal found 1/27$868
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.
Sat 11/218:45 am
SEA
-
SAI
1 stop34h 05m
Singapore Airlines
Sat 12/124:45 pm
SAI
-
SEA
1 stop29h 25m
Singapore Airlines
Deal found 1/26$931

Find flight deals from Washington to Siem Reap

Keep the following information in mind while searching for Washington to Siem Reap flight deals. Data was last updated January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$540
(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 Washington to Siem Reap–Angkor Intl
Search Deals
One-way flight from Washington to Siem Reap–Angkor Intl
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington 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 29, 2026.
Use the filters below to find and compare flights from Washington to Siem Reap that are best for you.

Fly from

Washington

Fly to

Siem Reap

Route

Depart

Return

Price

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Sat 5/23

10:15 am-9:40 am

1 stop33h 25m

Siem Reap–Angkor Intl

Sat 6/6

10:30 am-8:45 am

1 stop36h 15m

$540

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-8:45 am

1 stop36h 15m

$733

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Fri 6/26

10:15 am-3:10 pm

1 stop38h 55m

Siem Reap–Angkor Intl

Sat 7/11

10:30 am-8:45 am

1 stop36h 15m

$813

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Mon 4/6

7:37 pm-9:40 am

2 stops24h 03m

Siem Reap–Angkor Intl

Sun 4/19

10:30 am-10:39 am

2 stops38h 09m

$838

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Wed 2/25

12:32 pm-3:55 pm

2 stops60h 23m

Siem Reap–Angkor Intl

Wed 3/11

10:45 am-4:14 pm

2 stops43h 29m

$840

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

8:42 am-9:40 am

2 stops58h 58m

Siem Reap–Angkor Intl

Sun 4/19

10:30 am-10:39 am

2 stops38h 09m

$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-11:27 pm

2 stops50h 57m

$844

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Sat 4/4

10:15 am-9:40 am

1 stop33h 25m

Siem Reap–Angkor Intl

Sun 4/12

4:00 pm-8:59 am

2 stops30h 59m

$938

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Mon 4/6

5:45 pm-9:40 am

2 stops25h 55m

Siem Reap–Angkor Intl

Mon 4/20

10:30 am-6:35 pm

2 stops46h 05m

$959

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 20 results
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Best time to book a flight from Washington to Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap from Washington 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 Washington to Siem Reap
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Washington 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 into for flights to Siem Reap from Washington?

    Located just 24.7 mi from the city center, Siem Reap–Angkor Intl (SAI) is the airport most travelers will use when flying to Siem Reap from Washington.

  • How long is the flight from State of Washington to Siem Reap?

    Singapore Airlines and United Airlines can get you from State of Washington to Siem Reap in just under 24h 03m. Your travel time can differ by up to 9h 22m. Airlines will cover a distance of 7346 mi. This flight may include one or multiple stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington 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 Washington to Siem Reap

See prices for flight routes from nearby airports that may be better suited for you.
San Francisco to Siem Reap flights
Minneapolis to Siem Reap flights
Los Angeles to Siem Reap flights
Seattle to Siem Reap flights
Ontario to Siem Reap flights
John F Kennedy Intl to Siem Reap flights
Newark to Siem Reap flights
O'Hare Intl to Siem Reap flights
Dallas/Fort Worth to Siem Reap flights
Dulles Intl to Siem Reap flights
Atlanta to Siem Reap flights
San Jose to Siem Reap flights
Baltimore to Siem Reap flights
Boston to Siem Reap flights
Reagan-National to Siem Reap flights
Charlotte to Siem Reap flights
Philadelphia to Siem Reap flights
Denver to Siem Reap flights
Albuquerque to Siem Reap flights
Salt Lake City to Siem Reap flights
Sacramento to Siem Reap flights
LaGuardia to Siem Reap flights
Honolulu to Siem Reap flights
Tampa to Siem Reap flights
San Diego to Siem Reap flights
Redmond to Siem Reap flights
St. Louis to Siem Reap flights
Portland to Siem Reap flights
Miami to Siem Reap flights
Orlando to Siem Reap flights
Kansas City to Siem Reap flights
Long Beach to Siem Reap flights
Las Vegas to Siem Reap flights
Kailua-Kona to Siem Reap flights
Indianapolis to Siem Reap flights
Hobby to Siem Reap flights
Fort Lauderdale to Siem Reap flights

Top airline flying from Washington to Siem Reap

Discover the top airline that operate flights from Washington 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 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$523Average$1,083FlexibilityNo cancel feeOn-time81%

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