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Siem Reap

$1,294+ Cheap flights from District of Columbia to Siem Reap

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 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SAI
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
1 adult, Economy
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Cheap flight deals from District of Columbia to Siem Reap

Cheapest flights from District of Columbia to Siem Reap
Explore the most affordable flight options available from District of Columbia to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 3, 2026.

This oojo deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/19:10 pm
IAD
-
SAI
2 stops33h 35m
Multiple Airlines
Thu 12/101:20 pm
SAI
-
IAD
2 stops34h 25m
Multiple Airlines
Deal found 2/2$1,294
This FlightHub deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/168:20 pm
IAD
-
SAI
2 stops32h 50m
Multiple Airlines
Fri 4/247:25 pm
SAI
-
IAD
2 stops48h 15m
Multiple Airlines
Deal found 2/2$1,324
This oojo deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/19:59 am
DCA
-
SAI
2 stops41h 56m
Singapore Airlines
Thu 12/104:45 pm
SAI
-
DCA
2 stops41h 14m
Singapore Airlines
Deal found 2/2$1,556
This KAYAK deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/18:20 pm
IAD
-
SAI
2 stops35h 25m
SWISS
Fri 6/129:40 am
SAI
-
IAD
2 stops42h 05m
SWISS
Deal found 2/1$1,575
This oojo deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/13:30 pm
DCA
-
SAI
3 stops41h 40m
Emirates
Thu 12/1011:50 pm
SAI
-
DCA
3 stops32h 53m
Emirates
Deal found 2/2$1,743
This oojo deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/269:59 am
DCA
-
SAI
2 stops42h 11m
Singapore Airlines
Mon 7/2010:30 am
SAI
-
DCA
2 stops44h 32m
Singapore Airlines
Deal found 2/1$1,780
This United Airlines deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/2610:10 pm
IAD
-
SAI
2 stops48h 30m
United Airlines
Mon 7/2010:30 am
SAI
-
IAD
2 stops31h 55m
United Airlines
Deal found 2/1$1,899
This oojo deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/19:59 am
DCA
-
SAI
2 stops42h 11m
Singapore Airlines
Fri 6/1210:30 am
SAI
-
DCA
2 stops46h 29m
Singapore Airlines
Deal found 2/1$1,937
This Mytrip deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/2611:05 am
IAD
-
SAI
3 stops35h 10m
Multiple Airlines
Mon 7/203:15 pm
SAI
-
IAD
3 stops39h 10m
Multiple Airlines
Deal found 2/1$2,041
This Ovago deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/15:40 pm
IAD
-
SAI
3 stops38h 05m
Austrian Airlines
Fri 6/127:25 pm
SAI
-
IAD
2 stops30h 10m
Austrian Airlines
Deal found 2/1$2,158
This oojo deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/11:00 pm
IAD
-
SAI
3 stops44h 10m
Emirates
Thu 12/1011:50 pm
SAI
-
IAD
3 stops33h 15m
Emirates
Deal found 2/2$2,268
This Malaysia Airlines deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Malaysia Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/18:20 pm
IAD
-
SAI
3 stops35h 25m
Multiple Airlines
Fri 6/1212:55 pm
SAI
-
IAD
3 stops38h 10m
Multiple Airlines
Deal found 2/1$4,832

Find flight deals from District of Columbia to Siem Reap

Keep the following information in mind while searching for District of Columbia to Siem Reap flight deals. Data was last updated February 3, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$1,324
(FlightHub)
Provider with most accurate pricing for Washington, D.C. (WAS)-Siem Reap–Angkor Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Siem Reap–Angkor Intl flights.
Search Deals
From District of Columbia to Siem Reap
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from District of Columbia 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, Cheapflights users made 2,558,603 searches. Data last updated February 3, 2026.
Use the filters below to find and compare flights from District of Columbia to Siem Reap that are best for you.

Fly from

District of Columbia

Fly to

Siem Reap

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

Mon 6/1

8:20 pm-6:45 pm

2 stops35h 25m

Siem Reap–Angkor Intl

Fri 6/12

9:40 am-4:45 pm

2 stops42h 05m

$1,575

Washington, D.C.Siem Reap

DCA - SAI

DCASAI

Washington, D.C. Reagan-National

Fri 6/26

9:59 am-3:10 pm

2 stops42h 11m

Siem Reap–Angkor Intl

Mon 7/20

10:30 am-8:02 pm

2 stops44h 32m

$1,780

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Fri 6/26

10:10 pm-9:40 am

2 stops48h 30m

Siem Reap–Angkor Intl

Mon 7/20

10:30 am-7:25 am

2 stops31h 55m

$1,899

Washington, D.C.Siem Reap

DCA - SAI

DCASAI

Washington, D.C. Reagan-National

Mon 6/1

9:59 am-3:10 pm

2 stops42h 11m

Siem Reap–Angkor Intl

Fri 6/12

10:30 am-9:59 pm

2 stops46h 29m

$1,937

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Fri 6/26

11:05 am-9:15 am

3 stops35h 10m

Siem Reap–Angkor Intl

Mon 7/20

3:15 pm-7:25 pm

3 stops39h 10m

$2,041

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Mon 6/1

8:20 pm-6:45 pm

3 stops35h 25m

Siem Reap–Angkor Intl

Fri 6/12

12:55 pm-4:05 pm

3 stops38h 10m

$4,832

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

Best time to book a flight from District of Columbia to Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap from District of Columbia with our price prediction graph.
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.

Cheapflights Insights

Everything you need to know about your flight from District of Columbia to Siem Reap
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from District of Columbia to Siem Reap. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from District of Columbia to Region of Siem Reap?

    Departing from District of Columbia to Region of Siem Reap will take you 35h 25m. District of Columbia and Region of Siem Reap are separated by 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 District of Columbia to Siem Reap that include hotel bookings?

    Yes. In addition to deals on District of Columbia to Siem Reap flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from District of Columbia to Siem Reap?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from District of Columbia to Siem Reap.

  • Can I find deals for business class flights from District of Columbia to Siem Reap?

    Yes. Cheapflights offers flight deals from District of Columbia 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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Alternative routes for District of Columbia to Siem Reap

See prices for flight routes from nearby airports that may be better suited for you.
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