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 46h 40m. 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 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.

$513+ 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 October 4, 2026.

Sun 10/410:55 am -

2 stops47h 35m

Thu 10/2911:50 pm -

2 stops44h 10m

Deal found 9/30

$1,122

Thu 10/110:55 am -

2 stops47h 35m

Thu 10/2911:50 pm -

2 stops44h 10m

Deal found 9/30

$1,138

Sun 10/410:55 am -

2 stops47h 35m

Sat 10/3111:50 pm -

2 stops68h 20m

Deal found 9/30

$1,157

Thu 10/110:55 am -

2 stops47h 35m

Sat 10/3111:50 pm -

2 stops68h 20m

Deal found 9/30

$1,172

Sun 10/410:55 am -

2 stops47h 35m

Fri 10/301:20 pm -

2 stops54h 50m

Deal found 9/30

$1,309

Thu 10/110:55 am -

2 stops47h 35m

Mon 11/21:20 pm -

2 stops54h 50m

Deal found 9/30

$1,325

Thu 11/510:30 am -

2 stops46h 40m

Sat 11/1411:50 pm -

2 stops68h 20m

Deal found 9/30

$1,334

Fri 10/210:55 am -

2 stops38h 20m

Sat 10/3111:50 pm -

2 stops68h 20m

Deal found 9/30

$1,359

Mon 10/123:10 pm -

2 stops33h 05m

Mon 10/197:05 pm -

3 stops35h 25m

Deal found 9/30

$1,391

Sat 10/311:05 am -

2 stops34h 55m

Wed 10/287:25 pm -

2 stops32h 30m

Deal found 9/30

$1,411

Wed 9/301:15 am -

2 stops30h 30m

Fri 10/309:55 am -

2 stops23h 00m

Deal found 9/30

$1,475

Fri 10/210:55 am -

2 stops38h 20m

Mon 11/21:20 pm -

2 stops54h 50m

Deal found 9/30

$1,512

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 October 4, 2026.

Thu 11/510:30 am -

2 stops46h 40m

Sat 11/1411:50 pm -

2 stops68h 20m

Deal found 9/30

$1,334

Thu 11/56:00 pm -

3 stops39h 10m

Sat 11/1411:50 pm -

2 stops56h 15m

Deal found 9/30

$1,637

Mon 2/110:30 am -

2 stops38h 10m

Fri 2/51:20 pm -

2 stops30h 50m

Deal found 10/2

$1,388

Mon 2/111:55 pm -

3 stops28h 15m

Fri 2/59:30 am -

2 stops23h 25m

Deal found 10/2

$1,874

Wed 12/1611:55 pm -

2 stops29h 45m

Wed 12/239:55 am -

2 stops23h 00m

Deal found 10/4

$2,420

Thu 12/1710:30 am -

2 stops46h 40m

Thu 12/2411:50 pm -

2 stops44h 20m

Deal found 10/4

$2,910

Wed 12/1610:30 am -

2 stops38h 10m

Thu 12/2411:50 pm -

3 stops33h 24m

Deal found 10/4

$3,093

Last-minute flights from Dulles Intl to Siem Reap
Discover last-minute flight deals from Dulles Intl to Siem Reap. Data last updated October 4, 2026 and is based on user searches.

Fri 10/210:55 am -

2 stops38h 20m

Tue 10/2711:50 pm -

2 stops44h 10m

Deal found 9/30

$1,325

Fri 10/210:55 am -

2 stops38h 20m

Sat 10/3111:50 pm -

2 stops68h 20m

Deal found 9/30

$1,359

Fri 10/210:55 am -

2 stops38h 20m

Mon 11/21:20 pm -

2 stops54h 50m

Deal found 9/30

$1,512

Sat 10/311:05 am -

2 stops34h 55m

Wed 10/287:25 pm -

2 stops32h 30m

Deal found 9/30

$1,411

Sun 10/410:55 am -

2 stops47h 35m

Thu 10/2911:50 pm -

2 stops44h 10m

Deal found 9/30

$1,122

Sun 10/410:55 am -

2 stops47h 35m

Sat 10/3111:50 pm -

2 stops68h 20m

Deal found 9/30

$1,157

Sun 10/410:55 am -

2 stops47h 35m

Fri 10/301:20 pm -

2 stops54h 50m

Deal found 9/30

$1,309

Sun 10/48:30 am -

2 stops62h 10m

Sun 11/110:45 am -

2 stops32h 18m

Deal found 9/30

$1,661

Mon 10/123:10 pm -

2 stops33h 05m

Mon 10/197:05 pm -

3 stops35h 25m

Deal found 9/30

$1,391

Thu 11/510:30 am -

2 stops46h 40m

Sat 11/1411:50 pm -

2 stops68h 20m

Deal found 9/30

$1,334

Thu 11/56:00 pm -

3 stops39h 10m

Sat 11/1411:50 pm -

2 stops56h 15m

Deal found 9/30

$1,637

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 October 4, 2026.

Tue 2/92:35 pm -

2 stops40h 00m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/30

$513

Tue 1/192:25 pm -

2 stops33h 15m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/3

$528

Wed 10/149:00 pm -

2 stops49h 00m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/30

$680

Wed 10/149:00 pm -

2 stops28h 15m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/4

$755

Find flight deals from Dulles Intl to Siem Reap

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$1,334 (Emirates)
One-way from	$513 (Justfly.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

Tue 2/9

2:35 pm-6:35 pm

2 stops40h 00m

Siem Reap–Angkor Intl

Wed 12/31

12:00 am-12:00 pm

Nonstop0h 00m

$513

Washington, D.C.Siem Reap

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

IADSAI

Washington, D.C. Dulles Intl

Tue 1/19

2:25 pm-11:40 am

2 stops33h 15m

Siem Reap–Angkor Intl

Wed 12/31

12:00 am-12:00 pm

Nonstop0h 00m

$528

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-9:00 am

2 stops49h 00m

Siem Reap–Angkor Intl

Wed 12/31

12:00 am-12:00 pm

Nonstop0h 00m

$680

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 10/14

9:00 pm-4:25 pm

3 stops32h 25m

Siem Reap–Angkor Intl

Wed 12/31

12:00 am-12:00 pm

Nonstop0h 00m

$823

Washington, D.C.Siem Reap

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

IADSAI

Washington, D.C. Dulles Intl

Thu 11/5

10:30 am-9:10 pm

2 stops46h 40m

Siem Reap–Angkor Intl

Sat 11/14

11:50 pm-8:10 am

2 stops68h 20m

$1,334

Washington, D.C.Siem Reap

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

IADSAI

Washington, D.C. Dulles Intl

Mon 2/1

10:30 am-12:40 pm

2 stops38h 10m

Siem Reap–Angkor Intl

Fri 2/5

1:20 pm-8:10 am

2 stops30h 50m

$1,388

Washington, D.C.Siem Reap

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

IADSAI

Washington, D.C. Dulles Intl

Thu 11/5

6:00 pm-9:10 pm

3 stops39h 10m

Siem Reap–Angkor Intl

Sat 11/14

11:50 pm-8:05 pm

2 stops56h 15m

$1,637

Washington, D.C.Siem Reap

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

IADSAI

Washington, D.C. Dulles Intl

Mon 2/1

11:55 pm-4:10 pm

3 stops28h 15m

Siem Reap–Angkor Intl

Fri 2/5

9:30 am-8:55 pm

2 stops23h 25m

$1,874

Washington, D.C.Siem Reap

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

IADSAI

Washington, D.C. Dulles Intl

Wed 12/16

11:55 pm-5:40 pm

2 stops29h 45m

Siem Reap–Angkor Intl

Wed 12/23

9:55 am-8:55 pm

2 stops23h 00m

$2,420

Washington, D.C.Siem Reap

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

IADSAI

Washington, D.C. Dulles Intl

Thu 12/17

10:30 am-9:10 pm

2 stops46h 40m

Siem Reap–Angkor Intl

Thu 12/24

11:50 pm-8:10 am

2 stops44h 20m

$2,910

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/30

Showing 1-10 of 11 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 October.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	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 can get you from Washington, D.C. Dulles Intl Airport to Siem Reap in just under 46h 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.

See more FAQs

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$513+ 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 2/9. 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

1. Tell us where you want to go

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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 October 4, 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 October 4, 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 October 4, 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 October 4, 2026.

Last-minute flights from Dulles Intl to Siem ReapDiscover last-minute flight deals from Dulles Intl to Siem Reap. Data last updated October 4, 2026 and is based on user searches.

Discover last-minute flight deals from Dulles Intl to Siem Reap. Data last updated October 4, 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 October 4, 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 October 4, 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 October.

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 October 4, 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 October 4, 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 October 4, 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 October 4, 2026.

Last-minute flights from Dulles Intl to Siem Reap
Discover last-minute flight deals from Dulles Intl to Siem Reap. Data last updated October 4, 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 October 4, 2026.