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

Emirates, United Airlines, and Qatar Airways can get you from Washington, D.C. Dulles Intl Airport to Siem Reap in just under 25h 10m. Your travel time can differ by up to 21h 25m. 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.

In terms of precipitation, rainfall in Siem Reap ranges from 0.0 - 10.2 inches per month. September is typically the wettest month, when rainfall can reach 10.2 in. January is typically the driest time to visit Siem Reap when rainfall is around 0.0 in.

If weather is an important factor for your trip to Siem Reap, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 75.2 F).

What is the cheapest time of day to fly from IAD to SAI?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Dulles Intl Airport to Siem Reap as you normally would.

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.

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.

$512+ Cheap Flights from Washington, D.C. Dulles Intl Airport to Siem Reap, Cambodia

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Cheap flight deals from Dulles Intl to Siem Reap

Cheapest

Best

Last-minute

One-way

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 November 12, 2026.

Wed 11/112:25 pm -

2 stops34h 15m

Tue 11/171:20 pm -

2 stops31h 40m

Deal found 11/8

$1,663

Wed 11/118:05 pm -

3 stops49h 10m

Tue 11/171:20 pm -

3 stops38h 35m

Deal found 11/8

$2,742

Wed 12/232:25 pm -

2 stops57h 20m

Sun 1/37:05 pm -

2 stops56h 50m

Deal found 11/9

$2,846

Sun 12/278:05 pm -

2 stops49h 10m

Sun 1/310:25 pm -

2 stops34h 30m

Deal found 11/10

$2,901

Wed 12/161:30 pm -

2 stops44h 15m

Wed 12/3010:25 pm -

2 stops33h 00m

Deal found 11/7

$6,661

Sat 12/194:30 pm -

3 stops64h 40m

Sat 1/211:50 pm -

2 stops68h 45m

Deal found 11/7

$9,576

Best flights from Dulles Intl to Siem Reap
Discover carefully curated flight deals from Dulles Intl to Siem Reap that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 12, 2026.

Sun 2/2110:35 am -

2 stops46h 35m

Tue 2/2311:50 pm -

2 stops44h 45m

Deal found 11/9

$1,322

Sat 1/912:20 pm -

2 stops33h 35m

Wed 1/2010:45 am -

2 stops47h 14m

Deal found 11/8

$1,405

Fri 2/58:05 pm -

2 stops25h 10m

Sat 2/139:55 am -

2 stops42h 00m

Deal found 11/12

$1,417

Mon 1/46:00 pm -

2 stops51h 55m

Fri 1/229:55 am -

2 stops40h 15m

Deal found 11/7

$1,490

Tue 1/122:25 pm -

2 stops39h 00m

Thu 1/215:55 pm -

2 stops51h 05m

Deal found 11/7

$1,645

Sat 1/912:20 pm -

2 stops33h 35m

Mon 1/1810:45 am -

2 stops64h 55m

Deal found 11/8

$1,405

Sun 2/2110:35 am -

2 stops46h 35m

Wed 2/241:20 pm -

2 stops31h 15m

Deal found 11/9

$1,438

Thu 1/1412:20 pm -

2 stops39h 40m

Fri 1/2210:45 am -

2 stops39h 23m

Deal found 11/7

$1,495

Fri 1/82:25 pm -

2 stops34h 15m

Sun 1/171:20 pm -

2 stops31h 40m

Deal found 11/8

$1,646

Fri 2/511:55 pm -

2 stops26h 25m

Sat 2/139:55 am -

3 stops31h 49m

Deal found 11/12

$1,660

Wed 1/132:34 pm -

2 stops61h 26m

Wed 1/2010:45 am -

2 stops47h 14m

Deal found 11/7

$1,549

Last-minute flights from Dulles Intl to Siem Reap
Discover last-minute flight deals from Dulles Intl to Siem Reap. Data last updated November 12, 2026 and is based on user searches.

Wed 11/112:25 pm -

2 stops34h 15m

Tue 11/171:20 pm -

2 stops31h 40m

Deal found 11/8

$1,663

Wed 11/118:05 pm -

3 stops49h 10m

Tue 11/171:20 pm -

3 stops38h 35m

Deal found 11/8

$2,742

Wed 12/161:30 pm -

2 stops44h 15m

Wed 12/3010:25 pm -

2 stops33h 00m

Deal found 11/7

$6,661

Sat 12/194:30 pm -

3 stops64h 40m

Sat 1/211:50 pm -

2 stops68h 45m

Deal found 11/7

$9,576

Wed 12/232:25 pm -

2 stops57h 20m

Sun 1/37:05 pm -

2 stops56h 50m

Deal found 11/9

$2,846

Sun 12/278:05 pm -

2 stops49h 10m

Sun 1/310:25 pm -

2 stops34h 30m

Deal found 11/10

$2,901

One-way flights from Dulles Intl to Siem Reap
Search for one-way flight options from Dulles Intl to Siem Reap. Find affordable one-way fares based on user searches. Data last updated November 12, 2026.

Sun 2/2111:35 pm -

2 stops45h 40m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 11/9

$512

Fri 1/2211:35 pm -

2 stops45h 10m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 11/7

$515

Tue 2/2311:10 am -

2 stops34h 05m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 11/9

$618

Mon 2/222:25 pm -

2 stops57h 20m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 11/9

$622

Thu 2/252:25 pm -

2 stops33h 20m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 11/9

$624

Sat 4/1711:20 am -

3 stops58h 40m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 11/12

$626

Wed 2/242:25 pm -

2 stops30h 50m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 11/9

$674

Find flight deals from Dulles Intl to Siem Reap

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$1,108 (Emirates)
One-way from	$512 (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

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 Washington, D.C. Dulles Intl - SAI Siem Reap–Angkor Intl

IADSAI

Washington, D.C. Dulles Intl

Fri 1/22

11:35 pm-8:45 am

2 stops45h 10m

Siem Reap–Angkor Intl

Wed 12/31

12:00 am-12:00 pm

Nonstop0h 00m

$515

Washington, D.C.Siem Reap

IAD Washington, D.C. Dulles Intl - SAI Siem Reap–Angkor Intl

IADSAI

Washington, D.C. Dulles Intl

Tue 2/23

11:10 am-9:15 am

2 stops34h 05m

Siem Reap–Angkor Intl

Wed 12/31

12:00 am-12:00 pm

Nonstop0h 00m

$618

Washington, D.C.Siem Reap

IAD Washington, D.C. Dulles Intl - SAI Siem Reap–Angkor Intl

IADSAI

Washington, D.C. Dulles Intl

Thu 2/25

2:25 pm-11:45 am

2 stops33h 20m

Siem Reap–Angkor Intl

Wed 12/31

12:00 am-12:00 pm

Nonstop0h 00m

$624

Washington, D.C.Siem Reap

IAD Washington, D.C. Dulles Intl - SAI Siem Reap–Angkor Intl

IADSAI

Washington, D.C. Dulles Intl

Sat 4/17

11:20 am-9:00 am

3 stops58h 40m

Siem Reap–Angkor Intl

Wed 12/31

12:00 am-12:00 pm

Nonstop0h 00m

$626

Quickest round-trip

Washington, D.C.Siem Reap

IAD Washington, D.C. Dulles Intl - SAI Siem Reap–Angkor Intl

IADSAI

Washington, D.C. Dulles Intl

Wed 2/24

2:25 pm-9:15 am

2 stops30h 50m

Siem Reap–Angkor Intl

Wed 12/31

12:00 am-12:00 pm

Nonstop0h 00m

$674

Washington, D.C.Siem Reap

IAD Washington, D.C. Dulles Intl - SAI Siem Reap–Angkor Intl

IADSAI

Washington, D.C. Dulles Intl

Mon 2/22

6:00 pm-4:05 pm

3 stops34h 05m

Siem Reap–Angkor Intl

Wed 12/31

12:00 am-12:00 pm

Nonstop0h 00m

$839

Washington, D.C.Siem Reap

IAD Washington, D.C. Dulles Intl - SAI Siem Reap–Angkor Intl

IADSAI

Washington, D.C. Dulles Intl

Fri 12/25

11:35 pm-8:30 pm

2 stops56h 55m

Siem Reap–Angkor Intl

Wed 12/31

12:00 am-12:00 pm

Nonstop0h 00m

$1,122

Washington, D.C.Siem Reap

IAD Washington, D.C. Dulles Intl - SAI Siem Reap–Angkor Intl

IADSAI

Washington, D.C. Dulles Intl

Sun 2/21

10:35 am-9:10 pm

2 stops46h 35m

Siem Reap–Angkor Intl

Tue 2/23

11:50 pm-8:35 am

2 stops44h 45m

$1,322

Washington, D.C.Siem Reap

IAD Washington, D.C. Dulles Intl - SAI Siem Reap–Angkor Intl

IADSAI

Washington, D.C. Dulles Intl

Sat 1/9

12:20 pm-9:55 am

2 stops33h 35m

Siem Reap–Angkor Intl

Wed 1/20

10:45 am-9:59 pm

2 stops47h 14m

$1,405

Washington, D.C.Siem Reap

IAD Washington, D.C. Dulles Intl - SAI Siem Reap–Angkor Intl

IADSAI

Washington, D.C. Dulles Intl

Sat 1/9

12:20 pm-9:55 am

2 stops33h 35m

Siem Reap–Angkor Intl

Mon 1/18

10:45 am-3:40 pm

2 stops64h 55m

$1,405

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/7

Showing 1-10 of 18 resultsSorted by cheapest first

Compare providers for flights from Dulles Intl to Siem Reap

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 November.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy2 stars	Trust Score*3 stars
Ovago	Price Accuracy3 stars	Trust 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.

IAD-SAI

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

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, United Airlines, and Qatar Airways can get you from Washington, D.C. Dulles Intl Airport to Siem Reap in just under 25h 10m. Your travel time can differ by up to 21h 25m. 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

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$512+ 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 2/21. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Dulles Intl to Siem Reap with Cheapflights

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Cheap flight deals from Dulles Intl to Siem Reap

Cheapest flights from Dulles Intl to Siem ReapExplore 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 November 12, 2026.

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 November 12, 2026.

Best flights from Dulles Intl to Siem ReapDiscover carefully curated flight deals from Dulles Intl to Siem Reap that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 12, 2026.

Discover carefully curated flight deals from Dulles Intl to Siem Reap that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 12, 2026.

Last-minute flights from Dulles Intl to Siem ReapDiscover last-minute flight deals from Dulles Intl to Siem Reap. Data last updated November 12, 2026 and is based on user searches.

Discover last-minute flight deals from Dulles Intl to Siem Reap. Data last updated November 12, 2026 and is based on user searches.

One-way flights from Dulles Intl to Siem ReapSearch for one-way flight options from Dulles Intl to Siem Reap. Find affordable one-way fares based on user searches. Data last updated November 12, 2026.

Search for one-way flight options from Dulles Intl to Siem Reap. Find affordable one-way fares based on user searches. Data last updated November 12, 2026.

Find flight deals from Dulles Intl to Siem Reap

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Most trusted provider

Round-trip from

One-way from

Cheapflights Fare Finder

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

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 November.

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.

Related info for your journey

What airport do you fly into for flights to Siem Reap from Washington, D.C. Dulles Intl?

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

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

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

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

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.

Complete your trip

Complete your trip to Siem Reap by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Dulles Intl to Siem Reap by cabin class

Find flights from Dulles Intl to Siem Reap, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Dulles Intl and Siem Reap flights

Browse other Dulles Intl and Siem Reap flight options. Last updated on November 12, 2026.

Other flights from Dulles Intl

Browse through other flights departing from Dulles Intl. Flights are based on user searches made on Cheapflights and were last updated on November 12, 2026.

Popular flight searches

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Travel Smart

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 November 12, 2026.

Best flights from Dulles Intl to Siem Reap
Discover carefully curated flight deals from Dulles Intl to Siem Reap that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 12, 2026.

Last-minute flights from Dulles Intl to Siem Reap
Discover last-minute flight deals from Dulles Intl to Siem Reap. Data last updated November 12, 2026 and is based on user searches.

One-way flights from Dulles Intl to Siem Reap
Search for one-way flight options from Dulles Intl to Siem Reap. Find affordable one-way fares based on user searches. Data last updated November 12, 2026.