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

Emirates 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 . Airlines will cover a distance of 8814 mi.

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 Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Washington, D.C. Dulles Intl Airport-Siem Reap flight deals on Cheapflights vs. Expedia <90% 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 Expedia the most. Expedia 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.

$663+ Cheap Flights from Washington, D.C. Dulles Intl Airport to Siem Reap, Cambodia

Q: E

Most trusted provider : When it comes to deals on Washington, D.C. Dulles Intl Airport-Siem Reap flights, Cheapflights users trust Expedia the most. Expedia 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.

Q: 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.

Q: 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.

Q: 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.

Q: 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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Cheap flight deals from Dulles Intl to Siem Reap

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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 30, 2026.

Sat 9/512:50 pm -

2 stops33h 10m

Sat 10/107:10 pm -

2 stops31h 25m

Deal found 8/29

$1,175

Find flight deals from Dulles Intl to Siem Reap

Most accurate provider	Expedia 1 star
Most trusted provider	Expedia 3 stars
Round-trip from	$1,301 (Emirates)
One-way from	$663 (oojo)

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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

Sat 2/20

10:30 am-12:40 pm

2 stops38h 10m

Siem Reap–Angkor Intl

Sat 3/6

11:50 pm-8:10 am

2 stops68h 20m

$1,301

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

Sat 2/20

8:05 pm-9:15 am

3 stops49h 10m

Siem Reap–Angkor Intl

Sat 3/6

1:20 pm-3:55 pm

3 stops38h 35m

$2,227

Washington, D.C.Siem Reap

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

IADSAI

Washington, D.C. Dulles Intl

Wed 2/17

4:30 pm-9:10 pm

3 stops64h 40m

Siem Reap–Angkor Intl

Wed 2/24

5:05 pm-3:55 pm

3 stops58h 50m

$7,359

Cheapest one-way

Quickest one-way

Washington, D.C.Siem Reap

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

IADSAI

Washington, D.C. Dulles Intl

Wed 10/14

9:00 pm-12:15 pm

2 stops28h 15m

$663

Washington, D.C.Siem Reap

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

IADSAI

Washington, D.C. Dulles Intl

Sun 1/17

2:35 pm-4:00 pm

2 stops37h 25m

$711

Washington, D.C.Siem Reap

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

IADSAI

Washington, D.C. Dulles Intl

Wed 12/2

1:30 pm-8:45 am

2 stops31h 15m

$806

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/26

Sorted by cheapest first

Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Siem Reap flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Washington, D.C. Dulles Intl Airport-Siem Reap flight deals on Cheapflights vs. Expedia <90% 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 Expedia the most. Expedia 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 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 . 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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$663+ 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 10/14. 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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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 August 30, 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 August 30, 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 August 30, 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 August 30, 2026.

Last-minute flights from Dulles Intl to Siem ReapDiscover last-minute flight deals from Dulles Intl to Siem Reap. Data last updated August 30, 2026 and is based on user searches.

Discover last-minute flight deals from Dulles Intl to Siem Reap. Data last updated August 30, 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 August 30, 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 August 30, 2026.

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Best time to book a flight from Dulles Intl to Siem Reap

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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?

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Dulles Intl and Siem Reap flights

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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 30, 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 August 30, 2026.

Last-minute flights from Dulles Intl to Siem Reap
Discover last-minute flight deals from Dulles Intl to Siem Reap. Data last updated August 30, 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 August 30, 2026.