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

Prices for flights from Washington, D.C. to Siem Reap–Angkor Intl Airport were last updated today.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. to Siem Reap–Angkor Intl Airport.

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

The necessary travel and health documents for your Siem Reap–Angkor Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$1,304 Cheap Flights from Washington, D.C. to Siem Reap in 2026

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Find the cheapest flights from Washington, D.C. to Siem Reap

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1:50 am - 6:45 pm

IAD

SAI

29h 55m

2 stops

9:40 am - 10:30 pm

SAI

IAD

23h 50m

2 stops

$1,304Multiple Airlines

Mon, Aug 3 - Fri, Aug 14

3:10 pm - 8:50 am

IAD

SAI

30h 40m

2 stops

2:50 pm - 9:45 am

SAI

IAD

53h 55m

2 stops

$1,308Multiple Airlines

Mon, Apr 6 - Mon, Apr 13

1:20 pm - 9:00 am

IAD

SAI

32h 40m

2 stops

12:55 pm - 11:35 am

SAI

IAD

33h 40m

2 stops

$1,327Multiple Airlines

Tue, May 19 - Thu, May 28

1:50 am - 6:45 pm

IAD

SAI

29h 55m

2 stops

9:40 am - 10:30 pm

SAI

IAD

23h 50m

2 stops

$1,355Multiple Airlines

Mon, Aug 3 - Sat, Aug 15

9:59 am - 9:40 am

DCA

SAI

36h 41m

3 stops

10:30 am - 9:59 pm

SAI

DCA

46h 29m

2 stops

$1,701Singapore Airlines

Thu, Jul 30 - Thu, Aug 13

9:59 am - 9:40 am

DCA

SAI

36h 41m

3 stops

10:30 am - 9:59 pm

SAI

DCA

46h 29m

2 stops

$1,702Singapore Airlines

Thu, Jul 30 - Thu, Aug 13

9:59 am - 3:10 pm

DCA

SAI

42h 11m

2 stops

10:30 am - 8:00 pm

SAI

DCA

44h 30m

2 stops

$1,721Singapore Airlines

Mon, Aug 3 - Thu, Aug 13

12:40 pm - 9:40 am

DCA

SAI

58h 00m

3 stops

10:30 am - 10:15 pm

SAI

DCA

46h 45m

2 stops

$1,747United Airlines

Tue, May 19 - Wed, May 27

12:40 pm - 9:40 am

DCA

SAI

58h 00m

3 stops

10:30 am - 4:47 pm

SAI

DCA

41h 17m

2 stops

$1,787United Airlines

Tue, May 19 - Fri, May 29

5:59 pm - 9:40 am

DCA

SAI

28h 41m

2 stops

10:30 am - 9:53 pm

SAI

DCA

46h 23m

2 stops

$1,865United Airlines

Mon, Aug 3 - Wed, Aug 12

Singapore Airlines flights from Washington, D.C. to Siem Reap

Our best Singapore Airlines deals on Washington, D.C. to Siem Reap flight tickets

Singapore Airlines

Jul 30

DCA9:59 amWashington, D.C. Reagan-National

36h 41m

3 stops

SAI9:40 amSiem Reap–Angkor Intl

Aug 13

SAI10:30 amSiem Reap–Angkor Intl

46h 29m

2 stops

DCA9:59 pmWashington, D.C. Reagan-National

$1,701

Singapore Airlines

Aug 3

DCA9:59 amWashington, D.C. Reagan-National

42h 11m

2 stops

SAI3:10 pmSiem Reap–Angkor Intl

Aug 13

SAI10:30 amSiem Reap–Angkor Intl

44h 30m

2 stops

DCA8:00 pmWashington, D.C. Reagan-National

$1,721

Singapore Airlines

Aug 3

DCA9:59 amWashington, D.C. Reagan-National

42h 11m

3 stops

SAI3:10 pmSiem Reap–Angkor Intl

Aug 13

SAI10:30 amSiem Reap–Angkor Intl

44h 30m

2 stops

DCA8:00 pmWashington, D.C. Reagan-National

$1,734

United Airlines flights from Washington, D.C. to Siem Reap

Our best United Airlines deals on Washington, D.C. to Siem Reap flight tickets

United Airlines

Aug 3

IAD6:30 amWashington, D.C. Dulles Intl

40h 10m

2 stops

SAI9:40 amSiem Reap–Angkor Intl

Aug 12

SAI10:30 amSiem Reap–Angkor Intl

54h 30m

2 stops

IAD6:00 amWashington, D.C. Dulles Intl

$1,495

United Airlines

Jul 31

IAD10:21 pmWashington, D.C. Dulles Intl

48h 19m

2 stops

SAI9:40 amSiem Reap–Angkor Intl

Aug 12

SAI10:30 amSiem Reap–Angkor Intl

54h 30m

2 stops

IAD6:00 amWashington, D.C. Dulles Intl

$1,535

United Airlines

May 19

IAD10:10 pmWashington, D.C. Dulles Intl

48h 30m

2 stops

SAI9:40 amSiem Reap–Angkor Intl

May 29

SAI10:30 amSiem Reap–Angkor Intl

32h 00m

2 stops

IAD7:30 amWashington, D.C. Dulles Intl

$1,675

momondo Fare Finder

Use the filters below to find and compare flights from Washington, D.C. to Siem Reap that are best for you.

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Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Mon 8/3

1:50 am-6:45 pm

2 stops29h 55m

Siem Reap–Angkor Intl

Fri 8/14

9:40 am-10:30 pm

2 stops23h 50m

$1,304

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Mon 4/6

3:10 pm-8:50 am

2 stops30h 40m

Siem Reap–Angkor Intl

Mon 4/13

2:50 pm-9:45 am

2 stops53h 55m

$1,308

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Tue 5/19

1:20 pm-9:00 am

2 stops32h 40m

Siem Reap–Angkor Intl

Thu 5/28

12:55 pm-11:35 am

2 stops33h 40m

$1,327

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Mon 8/3

1:50 am-6:45 pm

2 stops29h 55m

Siem Reap–Angkor Intl

Sat 8/15

9:40 am-10:30 pm

2 stops23h 50m

$1,355

Washington, D.C.Siem Reap

DCA - SAI

DCASAI

Washington, D.C. Reagan-National

Thu 7/30

9:59 am-9:40 am

3 stops36h 41m

Siem Reap–Angkor Intl

Thu 8/13

10:30 am-9:59 pm

2 stops46h 29m

$1,701

Washington, D.C.Siem Reap

DCA - SAI

DCASAI

Washington, D.C. Reagan-National

Thu 7/30

9:59 am-9:40 am

3 stops36h 41m

Siem Reap–Angkor Intl

Thu 8/13

10:30 am-9:59 pm

2 stops46h 29m

$1,702

Washington, D.C.Siem Reap

DCA - SAI

DCASAI

Washington, D.C. Reagan-National

Mon 8/3

9:59 am-3:10 pm

2 stops42h 11m

Siem Reap–Angkor Intl

Thu 8/13

10:30 am-8:00 pm

2 stops44h 30m

$1,721

Washington, D.C.Siem Reap

DCA - SAI

DCASAI

Washington, D.C. Reagan-National

Tue 5/19

12:40 pm-9:40 am

3 stops58h 00m

Siem Reap–Angkor Intl

Wed 5/27

10:30 am-10:15 pm

2 stops46h 45m

$1,747

Washington, D.C.Siem Reap

DCA - SAI

DCASAI

Washington, D.C. Reagan-National

Tue 5/19

12:40 pm-9:40 am

3 stops58h 00m

Siem Reap–Angkor Intl

Fri 5/29

10:30 am-4:47 pm

2 stops41h 17m

$1,787

Washington, D.C.Siem Reap

DCA - SAI

DCASAI

Washington, D.C. Reagan-National

Mon 8/3

5:59 pm-9:40 am

2 stops28h 41m

Siem Reap–Angkor Intl

Wed 8/12

10:30 am-9:53 pm

2 stops46h 23m

$1,865

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Washington, D.C. 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

How long does it take to fly to Siem Reap?

On average, it takes 33h 18m to fly from Washington, D.C. to Siem Reap if you fly out of Washington, D.C. (the most popular airport in Washington, D.C.) and into Siem Reap (the most popular airport in Siem Reap). If you’re flying out of Baltimore and into Siem Reap, then the flight time is around 33h 55m.

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

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. 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. to Siem Reap (WAS to SAI) flight deals and tips

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

Fastest flight time	29h 55m
Direct flights	None

The fastest flight from Washington, D.C. to Siem Reap takes 29h 55m

There are no direct flights from Washington, D.C. to Siem Reap. There are no popular flight routes from Washington, D.C. to Siem Reap.

Search flight deals

How far is Washington, D.C. to Siem Reap–Angkor Intl by plane?
The straight-line distance from Washington, D.C. to Siem Reap–Angkor Intl is 8819.1 mi. By plane, this route typically takes 29h 55m.
When did momondo last update prices for flights from Washington, D.C. to Siem Reap–Angkor Intl Airport?
Prices for flights from Washington, D.C. to Siem Reap–Angkor Intl Airport were last updated today.
How old do you have to be to fly from Washington, D.C. to Siem Reap–Angkor Intl Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. to Siem Reap–Angkor Intl Airport.
What documentation or ID do you need to fly to Siem Reap–Angkor Intl Airport?
The necessary travel and health documents for your Siem Reap–Angkor Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to Siem Reap for you.

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

Flights from Washington, D.C. to Siem Reap with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo provides multiple filters to help you find the best flight to Siem Reap from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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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Cheap flights from Washington, D.C. to Siem Reap from $1,304

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. to Siem Reap departing on 8/3. 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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Singapore Airlines flights from Washington, D.C. to Siem Reap

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

How long does it take to fly to Siem Reap?

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

Cheap Washington, D.C. to Siem Reap (WAS to SAI) flight deals and tips

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

Fastest flight time

Direct flights

Why use momondo?

An easier way to manage your Siem Reap trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Cambodia

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.

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