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Siem Reap

$1,294+ Cheap flights from Washington, D.C. (WAS) 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 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SAI
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
1 adult, Economy
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Cheap flight deals from Washington, D.C. to Siem Reap

Cheapest flights from Washington, D.C. to Siem Reap
Explore the most affordable flight options available from Washington, D.C. 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 12/18:37 am
BWI
-
SAI
2 stops43h 18m
Singapore Airlines
Thu 12/1010:45 am
SAI
-
BWI
2 stops43h 21m
Singapore Airlines
Deal found 2/2$1,684
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 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.
Wed 3/186:13 am
BWI
-
SAI
2 stops46h 42m
Singapore Airlines
Wed 3/2510:45 am
SAI
-
BWI
2 stops41h 38m
Singapore Airlines
Deal found 2/1$1,793
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 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 6/266:40 pm
BWI
-
SAI
2 stops52h 00m
United Airlines
Mon 7/2010:30 am
SAI
-
BWI
2 stops31h 40m
United Airlines
Deal found 2/1$1,916
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

Find flight deals from Washington, D.C. to Siem Reap

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Siem Reap (SAI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data 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 Washington, D.C. (WAS) to Siem Reap–Angkor Intl
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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 Washington, D.C. to Siem Reap that are best for you.

Fly from

Washington, D.C.

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

BaltimoreSiem Reap

BWI - SAI

BWISAI

Baltimore/Washington

Wed 3/18

6:13 am-3:55 pm

2 stops46h 42m

Siem Reap–Angkor Intl

Wed 3/25

10:45 am-5:23 pm

2 stops41h 38m

$1,793

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

BaltimoreSiem Reap

BWI - SAI

BWISAI

Baltimore/Washington

Fri 6/26

6:40 pm-9:40 am

2 stops52h 00m

Siem Reap–Angkor Intl

Mon 7/20

10:30 am-7:10 am

2 stops31h 40m

$1,916

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

BaltimoreSiem Reap

BWI - SAI

BWISAI

Baltimore/Washington

Mon 6/1

6:40 pm-9:40 am

2 stops28h 00m

Siem Reap–Angkor Intl

Fri 6/12

10:30 am-7:10 am

2 stops31h 40m

$2,072

BaltimoreSiem Reap

BWI - SAI

BWISAI

Baltimore/Washington

Fri 6/26

5:50 pm-9:40 am

3 stops52h 50m

Siem Reap–Angkor Intl

Mon 7/20

10:30 am-4:47 pm

2 stops41h 17m

$2,086

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

Showing 1-10 of 12 results
1
2
  • Most accurate provider: When it comes to deals on Washington, D.C.-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.-Siem Reap flight deals on Cheapflights vs. Expedia <90% of the time. Price accuracy is based on data collected from Washington, D.C.-Siem Reap flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C.-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.-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 Washington, D.C. to Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap from Washington, D.C. 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 Washington, D.C. 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 Washington, D.C. to Siem Reap. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Siem Reap from Washington, D.C.?

    Most people fly into Siem Reap–Angkor Intl (SAI) if they book a flight to Siem Reap from Washington, D.C.. On average, Siem Reap–Angkor Intl has 0 inbound flights from Washington, D.C. per day from 0 airlines. Siem Reap–Angkor Intl is conveniently located just 24.7 mi from Siem Reap’s city center.

  • How long is the flight from Washington, D.C. to Siem Reap?

    Departing from Washington, D.C. to Siem Reap will take you 35h 25m. There are 8814 mi between Washington, D.C. and Siem Reap. This flight may include one or multiple stops.

  • What are the most popular routes from Washington, D.C. to Siem Reap?

    Most travelers choose Baltimore/Washington - Siem Reap–Angkor Intl, Washington, D.C. Dulles Intl - Siem Reap–Angkor Intl or Washington, D.C. Reagan-National - Siem Reap–Angkor Intl when deciding on the best route from Washington, D.C. to Siem Reap.

  • Can I find deals for flights from Washington, D.C. to Siem Reap that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Siem Reap flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Siem Reap?

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

  • Can I find deals for business class flights from Washington, D.C. to Siem Reap?

    Yes. Cheapflights offers flight deals from Washington, D.C. 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 Washington, D.C. to Siem Reap

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Siem Reap flights
Reagan-National to Siem Reap flights

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