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Siem Reap

$1,315+ Cheap flights from Dulles Intl (IAD) to Siem Reap, Cambodia (SAI)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SAI
May 21 — May 281
Thu 5/21
Thu 5/28
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 April 21, 2026.

This Gotogate deal was found by Cheapflights users on 4/18. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:00 pm
IAD
-
SAI
2 stops34h 55m
Multiple Airlines
Fri 11/131:20 pm
SAI
-
IAD
2 stops38h 35m
Multiple Airlines
Deal found 4/18$1,315
This Justfly.com deal was found by Cheapflights users on 4/19. 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.
Mon 8/109:00 pm
IAD
-
SAI
2 stops28h 15m
Multiple Airlines
Tue 9/17:35 pm
SAI
-
IAD
2 stops48h 10m
Multiple Airlines
Deal found 4/19$1,470
This SmartFares deal was found by Cheapflights users on 4/20. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/279:00 pm
IAD
-
SAI
2 stops34h 45m
Multiple Airlines
Sat 5/21:05 pm
SAI
-
IAD
2 stops40h 15m
Multiple Airlines
Deal found 4/20$1,491
This FlightHub deal was found by Cheapflights users on 4/16. 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.
Wed 5/209:00 pm
IAD
-
SAI
2 stops28h 20m
Multiple Airlines
Thu 5/281:05 pm
SAI
-
IAD
2 stops40h 15m
Multiple Airlines
Deal found 4/16$1,655
This Ovago deal was found by Cheapflights users on 4/17. 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.
Mon 5/183:10 pm
IAD
-
SAI
2 stops40h 55m
Etihad Airways
Wed 5/271:05 pm
SAI
-
IAD
2 stops31h 40m
Etihad Airways
Deal found 4/17$1,696
This Gurufare deal was found by Cheapflights users on 4/17. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/213:10 pm
IAD
-
SAI
2 stops34h 10m
Etihad Airways
Sat 5/301:05 pm
SAI
-
IAD
2 stops31h 40m
Etihad Airways
Deal found 4/17$1,697
This FlightHub deal was found by Cheapflights users on 4/17. 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.
Sun 5/179:00 pm
IAD
-
SAI
2 stops28h 20m
Multiple Airlines
Sun 5/247:45 pm
SAI
-
IAD
2 stops57h 35m
Multiple Airlines
Deal found 4/17$1,718
This FlightHub deal was found by Cheapflights users on 4/17. 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 5/219:00 pm
IAD
-
SAI
2 stops28h 20m
Multiple Airlines
Wed 5/277:45 pm
SAI
-
IAD
2 stops33h 35m
Multiple Airlines
Deal found 4/17$1,742
This FlightHub deal was found by Cheapflights users on 4/19. 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 8/1010:55 am
IAD
-
SAI
2 stops62h 20m
Emirates
Tue 9/111:50 pm
SAI
-
IAD
3 stops32h 32m
Emirates
Deal found 4/19$1,750

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 April 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,315
(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

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 April 21, 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

Thu 10/1

9:00 pm-6:55 pm

2 stops34h 55m

Siem Reap–Angkor Intl

Fri 11/13

1:20 pm-3:55 pm

2 stops38h 35m

$1,315

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Mon 8/10

9:00 pm-4:10 pm

2 stops32h 10m

Siem Reap–Angkor Intl

Tue 9/1

11:55 am-8:45 am

3 stops55h 50m

$1,482
Quickest round-trip

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Wed 5/20

9:00 pm-12:20 pm

2 stops28h 20m

Siem Reap–Angkor Intl

Wed 5/27

7:45 pm-6:20 pm

2 stops33h 35m

$1,655

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Mon 5/18

3:10 pm-7:05 pm

2 stops40h 55m

Siem Reap–Angkor Intl

Wed 5/27

1:05 pm-9:45 am

2 stops31h 40m

$1,696

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 5/21

3:10 pm-12:20 pm

2 stops34h 10m

Siem Reap–Angkor Intl

Sat 5/30

1:05 pm-9:45 am

2 stops31h 40m

$1,697

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Mon 8/10

10:55 am-12:15 pm

2 stops62h 20m

Siem Reap–Angkor Intl

Tue 9/1

11:50 pm-9:22 pm

3 stops32h 32m

$1,750

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Tue 5/19

3:10 pm-7:05 pm

2 stops40h 55m

Siem Reap–Angkor Intl

Tue 5/26

1:05 pm-9:45 am

2 stops31h 40m

$1,759

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Tue 6/30

3:30 pm-9:30 pm

3 stops43h 00m

Siem Reap–Angkor Intl

Fri 7/10

12:55 pm-8:40 am

2 stops30h 45m

$1,948

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 5/21

10:55 am-9:30 pm

2 stops47h 35m

Siem Reap–Angkor Intl

Tue 5/26

11:50 pm-8:40 am

2 stops43h 50m

$1,956

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Wed 5/20

10:55 am-12:20 pm

2 stops38h 25m

Siem Reap–Angkor Intl

Thu 5/28

11:50 pm-12:31 am

3 stops35h 41m

$2,028

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/18

Showing 1-10 of 11 resultsSorted by cheapest first
1
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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 April.
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.

  • 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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