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Cheap flights from Washington, D.C. Dulles Intl Airport to Siem Reap from $552

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to Siem Reap departing on 4/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Siem Reap

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
5:55 pm - 9:40 am
IAD
-
SAI
28h 45m
2 stops
United Airlines Logo
10:30 am - 7:50 am
SAI
-
IAD
32h 20m
2 stops
$1,405United Airlines
Fri, Apr 17 - Fri, Apr 24
Emirates Logo
11:15 am - 12:40 pm
IAD
-
SAI
38h 25m
2 stops
Emirates Logo
11:50 pm - 8:40 am
SAI
-
IAD
43h 50m
2 stops
$1,416Emirates
Wed, Mar 25 - Thu, Apr 2
Emirates Logo
11:15 am - 12:40 pm
IAD
-
SAI
38h 25m
2 stops
Emirates Logo
11:50 pm - 8:40 am
SAI
-
IAD
43h 50m
2 stops
$1,441Emirates
Wed, Mar 25 - Tue, Mar 31
Etihad Airways Logo
3:10 pm - 9:00 am
IAD
-
SAI
30h 50m
2 stops
Etihad Airways Logo
7:30 pm - 9:45 am
SAI
-
IAD
49h 15m
2 stops
$1,451Etihad Airways
Thu, Jul 30 - Thu, Aug 13
Emirates Logo
11:15 am - 12:40 pm
IAD
-
SAI
38h 25m
2 stops
Emirates Logo
11:50 pm - 8:40 am
SAI
-
IAD
43h 50m
2 stops
$1,481Emirates
Tue, Mar 24 - Thu, Apr 2
Emirates Logo
11:15 am - 12:40 pm
IAD
-
SAI
38h 25m
2 stops
Emirates Logo
11:50 pm - 8:40 am
SAI
-
IAD
43h 50m
2 stops
$1,506Emirates
Tue, Mar 24 - Tue, Mar 31
Emirates Logo
11:15 am - 12:40 pm
IAD
-
SAI
38h 25m
2 stops
Emirates Logo
11:50 pm - 8:40 am
SAI
-
IAD
43h 50m
2 stops
$1,531Emirates
Thu, Mar 26 - Thu, Apr 2
Emirates Logo
11:15 am - 12:40 pm
IAD
-
SAI
38h 25m
2 stops
Emirates Logo
11:50 pm - 8:40 am
SAI
-
IAD
43h 50m
2 stops
$1,556Emirates
Thu, Mar 26 - Tue, Mar 31
Multiple Airlines Logo
11:15 am - 12:40 pm
IAD
-
SAI
38h 25m
2 stops
Multiple Airlines Logo
7:30 pm - 8:40 am
SAI
-
IAD
48h 10m
2 stops
$1,688Multiple Airlines
Wed, Mar 25 - Wed, Apr 1
Emirates Logo
11:15 am - 12:40 pm
IAD
-
SAI
38h 25m
2 stops
Emirates Logo
11:50 pm - 11:59 pm
SAI
-
IAD
35h 09m
3 stops
$1,748Emirates
Wed, Mar 25 - Tue, Mar 31

Etihad Airways flights from Washington, D.C. Dulles Intl Airport to Siem Reap

Our best Etihad Airways deals on Washington, D.C. Dulles Intl Airport to Siem Reap flight tickets
Etihad Airways
Jul 30
IAD3:10 pmWashington, D.C. Dulles Intl
30h 50m
2 stops
SAI9:00 amSiem Reap–Angkor Intl
Aug 13
SAI7:30 pmSiem Reap–Angkor Intl
49h 15m
2 stops
IAD9:45 amWashington, D.C. Dulles Intl
$1,451
Etihad Airways
Mar 24
IAD3:35 pmWashington, D.C. Dulles Intl
40h 10m
2 stops
SAI6:45 pmSiem Reap–Angkor Intl
Apr 1
SAI7:30 pmSiem Reap–Angkor Intl
49h 15m
2 stops
IAD9:45 amWashington, D.C. Dulles Intl
$1,873
Etihad Airways
Mar 26
IAD3:35 pmWashington, D.C. Dulles Intl
30h 40m
2 stops
SAI9:15 amSiem Reap–Angkor Intl
Apr 1
SAI7:30 pmSiem Reap–Angkor Intl
49h 15m
2 stops
IAD9:45 amWashington, D.C. Dulles Intl
$2,278

Emirates flights from Washington, D.C. Dulles Intl Airport to Siem Reap

Our best Emirates deals on Washington, D.C. Dulles Intl Airport to Siem Reap flight tickets
Emirates
Mar 25
IAD11:15 amWashington, D.C. Dulles Intl
38h 25m
2 stops
SAI12:40 pmSiem Reap–Angkor Intl
Apr 2
SAI11:50 pmSiem Reap–Angkor Intl
43h 50m
2 stops
IAD8:40 amWashington, D.C. Dulles Intl
$1,416
Emirates
Mar 25
IAD11:15 amWashington, D.C. Dulles Intl
38h 25m
2 stops
SAI12:40 pmSiem Reap–Angkor Intl
Mar 31
SAI11:50 pmSiem Reap–Angkor Intl
43h 50m
2 stops
IAD8:40 amWashington, D.C. Dulles Intl
$1,441
Emirates
Mar 24
IAD11:15 amWashington, D.C. Dulles Intl
38h 25m
2 stops
SAI12:40 pmSiem Reap–Angkor Intl
Apr 2
SAI11:50 pmSiem Reap–Angkor Intl
43h 50m
2 stops
IAD8:40 amWashington, D.C. Dulles Intl
$1,481

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport 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, momondo users made 832,500 searches. Data last updated March 5, 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

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Fri 4/17

5:55 pm-9:40 am

2 stops28h 45m

Siem Reap–Angkor Intl

Fri 4/24

10:30 am-7:50 am

2 stops32h 20m

$1,405

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Wed 3/25

11:15 am-12:40 pm

2 stops38h 25m

Siem Reap–Angkor Intl

Thu 4/2

11:50 pm-8:40 am

2 stops43h 50m

$1,416

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Wed 3/25

11:15 am-12:40 pm

2 stops38h 25m

Siem Reap–Angkor Intl

Tue 3/31

11:50 pm-8:40 am

2 stops43h 50m

$1,441

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 7/30

3:10 pm-9:00 am

2 stops30h 50m

Siem Reap–Angkor Intl

Thu 8/13

7:30 pm-9:45 am

2 stops49h 15m

$1,451

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Tue 3/24

11:15 am-12:40 pm

2 stops38h 25m

Siem Reap–Angkor Intl

Thu 4/2

11:50 pm-8:40 am

2 stops43h 50m

$1,481

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Tue 3/24

11:15 am-12:40 pm

2 stops38h 25m

Siem Reap–Angkor Intl

Tue 3/31

11:50 pm-8:40 am

2 stops43h 50m

$1,506

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 3/26

11:15 am-12:40 pm

2 stops38h 25m

Siem Reap–Angkor Intl

Thu 4/2

11:50 pm-8:40 am

2 stops43h 50m

$1,531

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 3/26

11:15 am-12:40 pm

2 stops38h 25m

Siem Reap–Angkor Intl

Tue 3/31

11:50 pm-8:40 am

2 stops43h 50m

$1,556

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Wed 3/25

11:15 am-12:40 pm

2 stops38h 25m

Siem Reap–Angkor Intl

Wed 4/1

7:30 pm-8:40 am

2 stops48h 10m

$1,688

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Wed 3/25

11:15 am-12:40 pm

2 stops38h 25m

Siem Reap–Angkor Intl

Tue 3/31

11:50 pm-11:59 pm

3 stops35h 09m

$1,748

Flights are sorted by cheapest round-trip flights first.

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See travel insights to Siem Reap from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Siem Reap

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Washington, D.C. Dulles Intl to Siem Reap–Angkor Intl?

Qatar Airways is the most popular carrier operating from Washington, D.C. Dulles Intl to Siem Reap–Angkor Intl

When to book flights from Washington, D.C. Dulles Intl Airport to Siem Reap

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to Siem Reap according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Dulles Intl Airport to Siem Reap (IAD to SAI) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Siem Reap

Fastest flight time

28h 45m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Siem Reap takes 28h 45m
There are no direct flights from Washington, D.C. Dulles Intl Airport to Siem Reap. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to Siem Reap.
Search flight deals

  • How far is Washington, D.C. Dulles Intl to Siem Reap–Angkor Intl by plane?

    The distance between Washington, D.C. Dulles Intl and Siem Reap–Angkor Intl is about 8815.7 mi. A reasonable flight in good conditions will take 28h 45m.

  • When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Siem Reap–Angkor Intl Airport?

    Prices for flights from Washington, D.C. Dulles Intl Airport to Siem Reap–Angkor Intl Airport are updated daily.

  • How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Siem Reap–Angkor Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Siem Reap–Angkor Intl Airport.

  • What documentation or ID do you need to fly to Siem Reap–Angkor Intl Airport?

    The travel and health documents required for your trip to Siem Reap–Angkor Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Siem Reap–Angkor Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Siem Reap?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington, D.C. to Siem Reap. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Washington, D.C. to Siem Reap with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Washington, D.C. to Siem Reap flights to just show those with flexible booking policies.

How can momondo help me find flights from Washington, D.C. to Siem Reap?

momondo helps you find the best flight between Washington, D.C. and Siem Reap by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Washington, D.C. to Siem Reap right now. Can momondo alert me if prices change?

Price alerts on flights to Siem Reap from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Cabin classes currently available on flights to Siem Reap

List of cabin classes available on flights landing in Siem Reap. Availability may vary depending on flight origin and airline.
First Class to Siem Reap
Business Class to Siem Reap