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Cheap flights from Washington, D.C. Dulles Intl Airport to Siem Reap from $1,324

This is the cheapest round-trip 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 4/16. 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.
Multiple Airlines Logo
8:20 pm - 4:10 pm
IAD
-
SAI
32h 50m
2 stops
Multiple Airlines Logo
7:25 pm - 8:40 am
SAI
-
IAD
48h 15m
2 stops
$1,324Multiple Airlines
Thu, Apr 16 - Fri, Apr 24
Multiple Airlines Logo
9:00 pm - 3:10 pm
IAD
-
SAI
31h 10m
2 stops
Multiple Airlines Logo
7:10 pm - 8:40 am
SAI
-
IAD
48h 30m
2 stops
$1,333Multiple Airlines
Wed, Apr 8 - Wed, Apr 15
Multiple Airlines Logo
8:05 pm - 9:10 am
IAD
-
SAI
25h 05m
2 stops
Multiple Airlines Logo
6:50 pm - 4:55 pm
SAI
-
IAD
57h 05m
2 stops
$1,349Multiple Airlines
Sat, Mar 7 - Sat, Mar 14
Malaysia Airlines Logo
8:05 pm - 10:00 am
IAD
-
SAI
49h 55m
2 stops
Malaysia Airlines Logo
11:00 am - 9:20 am
SAI
-
IAD
33h 20m
2 stops
$1,359Malaysia Airlines
Sat, Mar 7 - Sat, Mar 14
Multiple Airlines Logo
8:05 pm - 9:10 am
IAD
-
SAI
25h 05m
2 stops
Multiple Airlines Logo
5:05 pm - 4:55 pm
SAI
-
IAD
58h 50m
3 stops
$1,365Multiple Airlines
Sat, Mar 7 - Sat, Mar 14
Multiple Airlines Logo
3:10 pm - 11:10 am
IAD
-
SAI
33h 00m
3 stops
Multiple Airlines Logo
3:15 pm - 4:05 pm
SAI
-
IAD
35h 50m
3 stops
$1,425Multiple Airlines
Wed, Apr 8 - Wed, Apr 15
Multiple Airlines Logo
3:10 pm - 6:20 am
IAD
-
SAI
28h 10m
3 stops
Multiple Airlines Logo
11:30 am - 9:45 am
SAI
-
IAD
33h 15m
3 stops
$1,447Multiple Airlines
Thu, Apr 16 - Fri, Apr 24
Multiple Airlines Logo
8:20 pm - 4:25 pm
IAD
-
SAI
33h 05m
3 stops
Multiple Airlines Logo
7:25 pm - 4:05 pm
SAI
-
IAD
31h 40m
2 stops
$1,514Multiple Airlines
Thu, Apr 16 - Fri, Apr 24
Multiple Airlines Logo
2:35 pm - 11:00 am
IAD
-
SAI
32h 25m
3 stops
Multiple Airlines Logo
11:50 pm - 7:50 pm
SAI
-
IAD
31h 00m
2 stops
$1,558Multiple Airlines
Fri, Feb 27 - Tue, Mar 31
Multiple Airlines Logo
8:05 pm - 9:15 am
IAD
-
SAI
49h 10m
2 stops
Multiple Airlines Logo
9:40 am - 11:35 am
SAI
-
IAD
36h 55m
2 stops
$1,631Multiple Airlines
Fri, Feb 27 - Tue, Mar 31

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport to Region of 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 February 4, 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

Thu 4/16

8:20 pm-4:10 pm

2 stops32h 50m

Siem Reap–Angkor Intl

Fri 4/24

7:25 pm-8:40 am

2 stops48h 15m

$1,324

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Wed 4/8

9:00 pm-3:10 pm

2 stops31h 10m

Siem Reap–Angkor Intl

Wed 4/15

7:10 pm-8:40 am

2 stops48h 30m

$1,333

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sat 3/7

8:05 pm-9:10 am

2 stops25h 05m

Siem Reap–Angkor Intl

Sat 3/14

6:50 pm-4:55 pm

2 stops57h 05m

$1,349

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sat 3/7

8:05 pm-10:00 am

2 stops49h 55m

Siem Reap–Angkor Intl

Sat 3/14

11:00 am-9:20 am

2 stops33h 20m

$1,359

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sat 3/7

8:05 pm-9:10 am

2 stops25h 05m

Siem Reap–Angkor Intl

Sat 3/14

5:05 pm-4:55 pm

3 stops58h 50m

$1,365

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Wed 4/8

3:10 pm-11:10 am

3 stops33h 00m

Siem Reap–Angkor Intl

Wed 4/15

3:15 pm-4:05 pm

3 stops35h 50m

$1,425

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 4/16

3:10 pm-6:20 am

3 stops28h 10m

Siem Reap–Angkor Intl

Fri 4/24

11:30 am-9:45 am

3 stops33h 15m

$1,447

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 4/16

8:20 pm-4:25 pm

3 stops33h 05m

Siem Reap–Angkor Intl

Fri 4/24

7:25 pm-4:05 pm

2 stops31h 40m

$1,514

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Fri 2/27

2:35 pm-11:00 am

3 stops32h 25m

Siem Reap–Angkor Intl

Tue 3/31

11:50 pm-7:50 pm

2 stops31h 00m

$1,558

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Fri 2/27

8:05 pm-9:15 am

2 stops49h 10m

Siem Reap–Angkor Intl

Tue 3/31

9:40 am-11:35 am

2 stops36h 55m

$1,631

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

Cheap Washington, D.C. Dulles Intl Airport to Region of Siem Reap flight deals and tips

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

Fastest flight time

32h 25m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Region of Siem Reap takes 32h 25m
There are no direct flights from Washington, D.C. Dulles Intl Airport to Region of Siem Reap. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to Region of Siem Reap.
Search flight deals

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

    Prices for flights from Washington, D.C. Dulles Intl Airport to Siem Reap are refreshed on a daily basis.

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. Dulles Intl Airport to Siem Reap.

  • What documentation or ID do you need to fly to Siem Reap?

    The travel and health documents you'll need for your trip to Siem Reap may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Siem Reap. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • How do I get Price Alerts for flights from Washington, D.C. Dulles Intl Airport to Region of Siem Reap?

    Price Alerts will notify you by email when the price for flights to Region of Siem Reap from Washington, D.C. Dulles Intl Airport decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from Washington, D.C. Dulles Intl Airport to Region of Siem Reap with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington, D.C. to Siem Reap. momondo saves you time and could save you money on your trip.

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?

If you are simply researching potential flights to Siem Reap, momondo offers a useful price alert feature which will track prices for flights to Siem Reap from Washington, D.C. and alert you when they change.

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