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Siem Reap

$623+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SAI
Jul 25 — Aug 11
Sat 7/25
Sat 8/1
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 June 25, 2026.

This Gotogate deal was found by Cheapflights users on 6/22. 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.
Wed 10/78:20 pm
IAD
-
SAI
2 stops35h 35m
SWISS
Thu 11/124:45 pm
SAI
-
IAD
2 stops36h 00m
SWISS
Deal found 6/22$1,283
This Justfly.com deal was found by Cheapflights users on 6/23. 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 10/229:00 pm
IAD
-
SAI
2 stops28h 15m
Multiple Airlines
Fri 11/207:25 pm
SAI
-
IAD
2 stops32h 30m
Multiple Airlines
Deal found 6/23$1,342
This FlightHub deal was found by Cheapflights users on 6/21. 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.
Sat 10/171:15 am
IAD
-
SAI
2 stops30h 40m
Multiple Airlines
Sat 10/249:40 am
SAI
-
IAD
2 stops23h 20m
Multiple Airlines
Deal found 6/21$1,431
This Gotogate deal was found by Cheapflights users on 6/22. 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.
Wed 10/710:20 pm
IAD
-
SAI
3 stops33h 35m
Multiple Airlines
Thu 11/121:20 pm
SAI
-
IAD
2 stops36h 50m
Multiple Airlines
Deal found 6/22$1,456
This KAYAK deal was found by Cheapflights users on 6/21. 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.
Sat 12/1210:55 pm
IAD
-
SAI
3 stops31h 50m
Multiple Airlines
Wed 12/304:45 pm
SAI
-
IAD
2 stops36h 00m
Multiple Airlines
Deal found 6/21$1,629
This FlightHub deal was found by Cheapflights users on 6/21. 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.
Sat 12/126:00 pm
IAD
-
SAI
2 stops51h 50m
Lufthansa
Wed 12/304:45 pm
SAI
-
IAD
2 stops39h 20m
Lufthansa
Deal found 6/21$1,691
This oojo deal was found by Cheapflights users on 6/22. 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 10/710:18 pm
IAD
-
SAI
3 stops60h 12m
Emirates
Thu 11/1211:50 pm
SAI
-
IAD
3 stops33h 14m
Emirates
Deal found 6/22$1,904
This KAYAK deal was found by Cheapflights users on 6/20. 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 6/3010:55 am
IAD
-
SAI
2 stops47h 35m
Emirates
Thu 7/3011:50 pm
SAI
-
IAD
2 stops43h 50m
Emirates
Deal found 6/20$2,277

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 June 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,253
(oojo)

One-way from

$623
(oojo)
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Siem Reap–Angkor Intl flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Siem Reap–Angkor Intl flights.
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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
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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 June 25, 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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Wed 10/7

10:20 pm-6:55 pm

3 stops33h 35m

Siem Reap–Angkor Intl

Thu 11/12

1:20 pm-2:10 pm

2 stops36h 50m

$1,456

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 10/22

9:00 pm-12:15 pm

2 stops28h 15m

Siem Reap–Angkor Intl

Fri 11/20

10:25 pm-8:10 am

3 stops45h 45m

$1,495

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sat 12/12

6:00 pm-9:50 am

2 stops51h 50m

Siem Reap–Angkor Intl

Wed 12/30

4:45 pm-8:05 pm

2 stops39h 20m

$1,691

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Wed 10/7

10:18 pm-9:30 pm

3 stops60h 12m

Siem Reap–Angkor Intl

Thu 11/12

11:50 pm-9:04 pm

3 stops33h 14m

$1,904
Quickest round-trip

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sat 12/12

7:40 pm-8:45 am

3 stops25h 05m

Siem Reap–Angkor Intl

Wed 12/30

4:50 pm-2:45 pm

3 stops33h 55m

$2,960

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sun 7/5

12:50 pm-9:00 am

2 stops33h 10m

Siem Reap–Angkor Intl

Sat 7/11

7:10 pm-10:05 am

2 stops25h 55m

$7,762

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sun 7/5

3:39 pm-9:30 pm

3 stops42h 51m

Siem Reap–Angkor Intl

Sat 7/11

11:50 pm-8:40 am

2 stops43h 50m

$9,051
Cheapest one-way
Quickest one-way

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 10/15

3:10 pm-11:15 am

2 stops33h 05m

$623

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Mon 8/24

5:15 pm-9:00 am

3 stops52h 45m

$2,402

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/22

Sorted by cheapest first

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 June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 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 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 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 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?

    Lufthansa and Emirates can get you from Washington, D.C. Dulles Intl Airport to Siem Reap in just under 51h 50m. Your travel time can differ by up to 8h 22m. Airlines will cover a distance of 8814 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 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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