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Siem Reap

$607+ 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 8/16. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SAI
Aug 6 — Aug 131
Thu 8/6
Thu 8/13
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 July 7, 2026.

This Gotogate deal was found by Cheapflights users on 7/6. 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.
Thu 8/273:10 pm
IAD
-
SAI
2 stops39h 40m
Multiple Airlines
Thu 9/173:10 pm
SAI
-
IAD
2 stops29h 35m
Multiple Airlines
Deal found 7/6$1,196
This oojo deal was found by Cheapflights users on 7/5. 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 11/12:35 pm
IAD
-
SAI
2 stops32h 20m
Multiple Airlines
Sun 11/152:50 pm
SAI
-
IAD
2 stops54h 15m
Multiple Airlines
Deal found 7/5$1,252
This FlightHub deal was found by Cheapflights users on 7/6. 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 9/110:20 pm
IAD
-
SAI
2 stops33h 35m
Multiple Airlines
Tue 9/229:40 am
SAI
-
IAD
2 stops40h 45m
Multiple Airlines
Deal found 7/6$1,261
This Justfly.com deal was found by Cheapflights users on 7/6. 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.
Wed 8/1910:20 pm
IAD
-
SAI
2 stops33h 35m
Multiple Airlines
Tue 9/810:30 am
SAI
-
IAD
2 stops41h 15m
Multiple Airlines
Deal found 7/6$1,285
This Orbitz deal was found by Cheapflights users on 7/6. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:00 pm
IAD
-
SAI
2 stops27h 50m
Multiple Airlines
Wed 11/259:55 am
SAI
-
IAD
2 stops42h 50m
Multiple Airlines
Deal found 7/6$1,325
This oojo deal was found by Cheapflights users on 7/6. 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 9/99:00 pm
IAD
-
SAI
2 stops25h 00m
Multiple Airlines
Wed 9/309:40 am
SAI
-
IAD
2 stops34h 05m
Multiple Airlines
Deal found 7/6$1,330
This FlightHub deal was found by Cheapflights users on 7/5. 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 10/3112:55 am
IAD
-
SAI
2 stops30h 50m
Multiple Airlines
Mon 11/169:55 am
SAI
-
IAD
2 stops23h 00m
Multiple Airlines
Deal found 7/5$1,363
This KAYAK deal was found by Cheapflights users on 7/5. 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.
Sun 11/18:10 pm
IAD
-
SAI
2 stops49h 40m
SWISS
Sun 11/159:55 am
SAI
-
IAD
2 stops42h 50m
SWISS
Deal found 7/5$1,368
This Booking.com deal was found by Cheapflights users on 7/4. 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.
Thu 11/52:35 pm
IAD
-
SAI
2 stops34h 05m
Multiple Airlines
Sat 11/142:10 pm
SAI
-
IAD
2 stops30h 55m
Multiple Airlines
Deal found 7/4$1,370
This FlightHub deal was found by Cheapflights users on 7/5. 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.
Mon 11/211:55 pm
IAD
-
SAI
2 stops30h 50m
Multiple Airlines
Mon 11/169:55 am
SAI
-
IAD
2 stops23h 00m
Multiple Airlines
Deal found 7/5$1,385
This Justfly.com deal was found by Cheapflights users on 7/5. 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 10/301:15 am
IAD
-
SAI
2 stops30h 30m
Multiple Airlines
Mon 11/169:55 am
SAI
-
IAD
2 stops23h 00m
Multiple Airlines
Deal found 7/5$1,393

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 July 7, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,196
(Gotogate)

One-way from

$607
(Kiwi.com)
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 July 7, 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

Sun 11/1

8:10 pm-9:50 am

2 stops49h 40m

Siem Reap–Angkor Intl

Sun 11/15

9:55 am-4:45 pm

2 stops42h 50m

$1,368

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 11/5

8:05 pm-9:15 am

2 stops25h 10m

Siem Reap–Angkor Intl

Sat 11/14

1:20 pm-3:55 pm

2 stops38h 35m

$1,381
Quickest round-trip

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sat 10/31

12:55 am-6:45 pm

2 stops30h 50m

Siem Reap–Angkor Intl

Sat 11/14

9:55 am-8:55 pm

2 stops23h 00m

$1,401

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Wed 8/19

3:10 pm-11:10 am

3 stops33h 00m

Siem Reap–Angkor Intl

Tue 9/8

11:55 am-10:50 am

2 stops33h 55m

$1,434

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sat 10/31

9:05 pm-12:40 pm

2 stops28h 35m

Siem Reap–Angkor Intl

Sun 11/15

7:25 pm-3:55 pm

2 stops32h 30m

$1,434

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sun 11/1

10:10 pm-9:10 pm

3 stops35h 00m

Siem Reap–Angkor Intl

Sun 11/15

9:55 am-4:45 pm

2 stops42h 50m

$1,483

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Tue 9/1

9:00 pm-11:15 am

3 stops51h 15m

Siem Reap–Angkor Intl

Tue 9/22

3:10 pm-3:40 pm

3 stops35h 30m

$1,555

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 11/5

8:16 am-9:10 pm

3 stops48h 54m

Siem Reap–Angkor Intl

Sat 11/14

11:50 pm-8:10 am

2 stops44h 20m

$1,788
Cheapest one-way

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Wed 8/12

1:20 pm-9:00 am

2 stops56h 40m

$608

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Wed 8/19

1:20 pm-6:05 pm

2 stops41h 45m

$628

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/6

Showing 1-10 of 17 resultsSorted by cheapest first
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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 July.
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?

    SWISS can get you from Washington, D.C. Dulles Intl Airport to Siem Reap in just under 49h 40m. 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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