HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Siem Reap

$621+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SAI
Sep 2 — Sep 91
Wed 9/2
Wed 9/9
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to Siem Reap with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 August 3, 2026.

This oojo deal was found by Cheapflights users on 7/30. 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.
Sat 10/241:15 am
IAD
-
SAI
2 stops30h 30m
Multiple Airlines
Sun 11/17:25 pm
SAI
-
IAD
2 stops37h 30m
Multiple Airlines
Deal found 7/30$1,209
This Gotogate deal was found by Cheapflights users on 7/29. 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 9/161:15 am
IAD
-
SAI
2 stops30h 40m
Multiple Airlines
Mon 9/219:40 am
SAI
-
IAD
2 stops23h 20m
Multiple Airlines
Deal found 7/29$1,225
This KAYAK deal was found by Cheapflights users on 7/30. 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 10/258:23 am
IAD
-
SAI
3 stops45h 32m
ANA
Sun 11/16:40 pm
SAI
-
IAD
3 stops38h 33m
ANA
Deal found 7/30$1,678
This Expedia deal was found by Cheapflights users on 8/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2611:55 pm
IAD
-
SAI
2 stops30h 50m
Multiple Airlines
Sat 1/27:25 pm
SAI
-
IAD
2 stops61h 30m
Multiple Airlines
Deal found 8/1$2,073
This oojo deal was found by Cheapflights users on 8/3. 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.
Fri 12/1811:55 pm
IAD
-
SAI
2 stops25h 20m
Multiple Airlines
Sun 1/37:25 pm
SAI
-
IAD
2 stops37h 30m
Multiple Airlines
Deal found 8/3$3,148
This British Airways deal was found by Cheapflights users on 8/2. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2810:25 pm
IAD
-
SAI
2 stops33h 30m
Multiple Airlines
Sun 10/49:40 am
SAI
-
IAD
2 stops42h 45m
Multiple Airlines
Deal found 8/2$3,371

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 August 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,209
(oojo)

One-way from

$621
(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 August 3, 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
Quickest round-trip

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Wed 9/16

1:15 am-6:55 pm

2 stops30h 40m

Siem Reap–Angkor Intl

Mon 9/21

9:40 am-10:00 pm

2 stops23h 20m

$1,225

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Mon 1/11

10:30 am-12:40 pm

2 stops38h 10m

Siem Reap–Angkor Intl

Sat 2/13

11:50 pm-8:10 am

2 stops68h 20m

$1,501

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sun 1/10

2:35 pm-9:15 am

2 stops54h 40m

Siem Reap–Angkor Intl

Sun 2/14

9:55 am-9:05 am

2 stops35h 10m

$1,511

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Tue 1/12

3:30 pm-9:10 pm

3 stops41h 40m

Siem Reap–Angkor Intl

Thu 2/11

11:50 pm-8:10 am

2 stops44h 20m

$1,565

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Wed 1/6

2:35 pm-12:40 pm

2 stops34h 05m

Siem Reap–Angkor Intl

Mon 2/15

9:55 am-9:05 am

2 stops35h 10m

$1,575

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Wed 1/6

2:35 pm-12:40 pm

2 stops34h 05m

Siem Reap–Angkor Intl

Sun 2/14

9:55 am-9:05 am

2 stops35h 10m

$1,615

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 1/7

2:35 pm-12:40 pm

2 stops34h 05m

Siem Reap–Angkor Intl

Wed 2/10

1:20 pm-9:05 am

2 stops31h 45m

$1,667

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sat 12/26

11:55 pm-6:45 pm

2 stops30h 50m

Siem Reap–Angkor Intl

Sat 1/2

7:25 pm-8:55 pm

2 stops61h 30m

$2,073

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Fri 12/18

11:55 pm-1:15 pm

2 stops25h 20m

Siem Reap–Angkor Intl

Sun 1/3

7:25 pm-8:55 pm

2 stops37h 30m

$3,148
Cheapest one-way

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Wed 9/2

6:20 am-4:10 pm

3 stops46h 50m

$624

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

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 August.
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?

    Emirates and Etihad Airways can get you from Washington, D.C. Dulles Intl Airport to Siem Reap in just under 38h 10m. Your travel time can differ by up to 16h 30m. 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.