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Siem Reap

$276+ Cheap flights from Washington 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 4/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SAI
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
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 February 3, 2026.

This FlightHub deal was found by Cheapflights users on 2/1. 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 2/1$516
This oojo deal was found by Cheapflights users on 2/2. 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 5/2011:38 am
SEA
-
SAI
2 stops32h 02m
Singapore Airlines
Wed 5/2710:30 am
SAI
-
SEA
1 stop36h 15m
Singapore Airlines
Deal found 2/2$823
This Booking.com deal was found by Cheapflights users on 2/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/511:45 am
SEA
-
SAI
2 stops34h 30m
Multiple Airlines
Wed 10/287:25 pm
SAI
-
SEA
2 stops28h 45m
Multiple Airlines
Deal found 2/2$839
This oojo deal was found by Cheapflights users on 2/2. 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.
Mon 10/55:55 pm
SEA
-
SAI
2 stops31h 15m
Singapore Airlines
Wed 10/284:45 pm
SAI
-
SEA
1 stop29h 25m
Singapore Airlines
Deal found 2/2$942
This United Airlines deal was found by Cheapflights users on 2/1. 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 2/257:15 am
SEA
-
SAI
2 stops35h 35m
United Airlines
Wed 3/1110:45 am
SAI
-
SEA
2 stops43h 29m
United Airlines
Deal found 2/1$994
This FlightHub deal was found by Cheapflights users on 2/2. 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 12/311:30 pm
SEA
-
SAI
2 stops22h 45m
Multiple Airlines
Fri 12/116:50 pm
SAI
-
SEA
2 stops37h 40m
Multiple Airlines
Deal found 2/2$1,030
This FlightHub deal was found by Cheapflights users on 2/1. 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 5/2610:15 am
SEA
-
SAI
1 stop33h 25m
Singapore Airlines
Wed 6/34:00 pm
SAI
-
SEA
1 stop30h 45m
Singapore Airlines
Deal found 2/1$1,046
This KAYAK deal was found by Cheapflights users on 2/1. 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.
Tue 11/37:49 pm
PDX
-
SAI
2 stops29h 06m
Singapore Airlines
Sun 11/2910:45 am
SAI
-
PDX
2 stops53h 09m
Singapore Airlines
Deal found 2/1$1,103
This Gotogate deal was found by Cheapflights users on 2/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/23:15 pm
PDX
-
SAI
2 stops27h 00m
Multiple Airlines
Sat 11/287:25 pm
SAI
-
PDX
2 stops29h 00m
Multiple Airlines
Deal found 2/1$1,201
This Ovago deal was found by Cheapflights users on 2/1. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/310:30 am
PDX
-
SAI
3 stops31h 45m
Multiple Airlines
Sun 11/2910:45 am
SAI
-
PDX
2 stops53h 09m
Multiple Airlines
Deal found 2/1$1,251
This oojo deal was found by Cheapflights users on 2/1. 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.
Mon 11/27:00 am
PDX
-
SAI
3 stops35h 50m
Singapore Airlines
Sat 11/2810:45 am
SAI
-
PDX
2 stops26h 48m
Singapore Airlines
Deal found 2/1$1,470
This Qatar Airways deal was found by Cheapflights users on 2/1. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/211:57 am
PDX
-
SAI
3 stops30h 18m
Qatar Airways
Sat 11/287:25 pm
SAI
-
PDX
3 stops38h 50m
Qatar Airways
Deal found 2/1$2,281

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 February 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$711
(FlightHub)

One-way from

$276
(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 Washington to Siem Reap
Search Deals
One-way flight from Washington to Siem Reap
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 February 3, 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

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

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

$823

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Wed 3/4

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

$1,001

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

$1,001

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Tue 2/24

12:10 am-5:30 pm

2 stops26h 20m

Siem Reap–Angkor Intl

Wed 3/11

1:25 pm-7:10 pm

2 stops19h 45m

$1,009

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Tue 5/19

1:50 am-6:45 pm

2 stops26h 55m

Siem Reap–Angkor Intl

Wed 5/27

9:40 am-7:30 pm

2 stops23h 50m

$1,087

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Sat 5/30

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

$1,122

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Fri 4/3

10:15 am-3:10 pm

1 stop38h 55m

$276

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Fri 4/10

10:15 am-9:40 am

1 stop33h 25m

$276

SeattleSiem Reap

SEA - SAI

SEASAI

Seattle/Tacoma Intl

Tue 3/3

8:45 am-9:50 am

1 stop34h 05m

$278

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

Showing 1-10 of 16 results
1
2

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.

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 3, 2026.
Read reviews from past customers who have flown Singapore Airlines from Washington to Siem Reap. 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
1,443 reviews

Crew

8.6

Entertainment

8.0

Boarding

8.3

Comfort

8.0

Overall

8.2

Food

7.8

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Singapore Airlines
8.2
Very good
1,443 reviews
Singapore Airlines
8.2
Very good
1,443 reviews

Crew

8.6

Entertainment

8.0

Boarding

8.3

Comfort

8.0

Overall

8.2

Food

7.8

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.

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.

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

    A quick flight from State of Washington to Region of Siem Reap can take about 35h 35m. Singapore Airlines provides one of the quickest options available for as low as $994. The distance from State of Washington to Region of 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.

  • 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.
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O'Hare Intl to Siem Reap flights
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Dallas/Fort Worth to Siem Reap flights
George Bush Intcntl to Siem Reap flights
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Newark to Phnom Penh flights
White Plains to Phnom Penh flights
Dulles Intl to Phnom Penh flights
John F Kennedy Intl to Phnom Penh flights
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Miami to Phnom Penh flights
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Charleston to Phnom Penh flights
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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 February 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$523Average$1,083FlexibilityNo cancel feeOn-time81%

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