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Siem Reap

$594+ Cheap flights from Dulles Intl (IAD) 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 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SAI
Feb 18 — Feb 251
Wed 2/18
Wed 2/25
1 adult, Economy
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Cheap flight deals from Dulles Intl to Siem Reap

Cheapest flights from Dulles Intl to Siem Reap
Explore the most affordable flight options available from Dulles Intl to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 19, 2026.

This oojo deal was found by Cheapflights users on 1/18. 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.
Sun 11/110:10 pm
IAD
-
SAI
2 stops32h 35m
Multiple Airlines
Sun 11/227:25 pm
SAI
-
IAD
2 stops35h 50m
Multiple Airlines
Deal found 1/18$1,220
This Gotogate deal was found by Cheapflights users on 1/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/168:05 pm
IAD
-
SAI
2 stops25h 05m
Multiple Airlines
Sun 3/84:00 pm
SAI
-
IAD
2 stops35h 55m
Multiple Airlines
Deal found 1/15$1,614
This FlightHub deal was found by Cheapflights users on 1/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/2411:05 am
IAD
-
SAI
2 stops44h 40m
Multiple Airlines
Sun 8/912:55 pm
SAI
-
IAD
2 stops30h 50m
Multiple Airlines
Deal found 1/16$1,729
This Ovago deal was found by Cheapflights users on 1/18. 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.
Sun 11/16:20 pm
IAD
-
SAI
3 stops36h 25m
Austrian Airlines
Sun 11/227:25 pm
SAI
-
IAD
2 stops30h 45m
Austrian Airlines
Deal found 1/18$1,992
This KAYAK deal was found by Cheapflights users on 1/16. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/2410:20 pm
IAD
-
SAI
3 stops33h 25m
Lufthansa
Sun 8/97:25 pm
SAI
-
IAD
3 stops30h 40m
Lufthansa
Deal found 1/16$3,012
This Arangrant deal was found by Cheapflights users on 1/18. 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 Arangrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/193:35 pm
IAD
-
SAI
2 stops33h 40m
Etihad Airways
Thu 5/2812:55 pm
SAI
-
IAD
2 stops31h 50m
Etihad Airways
Deal found 1/18$5,181
This Arangrant deal was found by Cheapflights users on 1/18. 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 Arangrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/193:35 pm
IAD
-
SAI
2 stops30h 25m
Etihad Airways
Fri 5/297:25 pm
SAI
-
IAD
2 stops49h 20m
Etihad Airways
Deal found 1/18$5,206
This Booking.com deal was found by Cheapflights users on 1/18. 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.
Wed 5/2012:15 pm
IAD
-
SAI
2 stops37h 00m
Multiple Airlines
Wed 5/277:10 pm
SAI
-
IAD
2 stops25h 55m
Multiple Airlines
Deal found 1/18$5,740
This Arangrant deal was found by Cheapflights users on 1/18. 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 Arangrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/223:35 pm
IAD
-
SAI
2 stops30h 25m
Etihad Airways
Wed 5/2712:55 pm
SAI
-
IAD
2 stops31h 50m
Etihad Airways
Deal found 1/18$6,450
This Arangrant deal was found by Cheapflights users on 1/18. 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 Arangrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/188:20 pm
IAD
-
SAI
2 stops35h 25m
Qatar Airways
Tue 5/2612:55 pm
SAI
-
IAD
2 stops38h 10m
Qatar Airways
Deal found 1/18$6,849

Find flight deals from Dulles Intl to Siem Reap

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) 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 January 19, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$1,614
(Gotogate)

One-way from

$594
(Gotogate)
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Siem Reap–Angkor Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Siem Reap–Angkor Intl flights.
Search Deals
From Washington, D.C. Dulles Intl to Siem Reap–Angkor Intl
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Siem Reap–Angkor Intl
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl 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 19, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Siem Reap that are best for you.

Fly from

Dulles Intl

Fly to

Siem Reap

Route

Depart

Return

Price

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Mon 2/16

8:05 pm-9:10 am

2 stops25h 05m

Siem Reap–Angkor Intl

Sun 3/8

4:00 pm-4:55 pm

2 stops35h 55m

$1,614

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 5/21

3:35 pm-9:00 am

2 stops30h 25m

Siem Reap–Angkor Intl

Thu 5/28

12:55 pm-9:45 am

2 stops31h 50m

$5,181

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 5/21

3:35 pm-9:00 am

2 stops30h 25m

Siem Reap–Angkor Intl

Tue 5/26

12:55 pm-9:45 am

2 stops31h 50m

$5,181

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Tue 5/19

3:35 pm-9:00 am

2 stops30h 25m

Siem Reap–Angkor Intl

Tue 5/26

12:55 pm-9:45 am

2 stops31h 50m

$5,181

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Tue 5/19

3:35 pm-12:15 pm

2 stops33h 40m

Siem Reap–Angkor Intl

Mon 5/25

7:25 pm-9:45 am

2 stops49h 20m

$5,181

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Tue 5/19

3:35 pm-12:15 pm

2 stops33h 40m

Siem Reap–Angkor Intl

Wed 5/27

12:55 pm-9:45 am

2 stops31h 50m

$5,181

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 5/21

3:35 pm-9:00 am

2 stops30h 25m

Siem Reap–Angkor Intl

Fri 5/29

7:25 pm-9:45 am

2 stops49h 20m

$5,206

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Tue 5/19

3:35 pm-9:00 am

2 stops30h 25m

Siem Reap–Angkor Intl

Fri 5/29

7:25 pm-9:45 am

2 stops49h 20m

$5,206

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Wed 5/20

12:15 pm-12:15 pm

2 stops37h 00m

Siem Reap–Angkor Intl

Wed 5/27

7:10 pm-10:05 am

2 stops25h 55m

$5,740

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Fri 5/22

3:35 pm-9:00 am

2 stops30h 25m

Siem Reap–Angkor Intl

Tue 5/26

12:55 pm-9:45 am

2 stops31h 50m

$6,450

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/15

Showing 1-10 of 12 results
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Compare providers for flights from Dulles Intl 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 Dulles Intl to Siem Reap in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

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

Have a flexible travel schedule? Discover the best time to fly to Siem Reap from Dulles Intl 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.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl 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, D.C. Dulles Intl?

    Siem Reap–Angkor Intl (SAI), located 24.7 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. Dulles Intl to Siem Reap. 0 airlines have flights to Siem Reap–Angkor Intl from Washington, D.C. Dulles Intl on a regular basis. Booking flights from Washington, D.C. Dulles Intl to Siem Reap–Angkor Intl should not be difficult; the airport handles an average of 0 inbound flights from Washington, D.C. Dulles Intl per day.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Siem Reap?

    Etihad Airways can get you from Washington, D.C. Dulles Intl Airport to Siem Reap in just under 30h 25m. Your travel time can differ by up to . Airlines will cover a distance of 8814 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl 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.

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