How long does it take to fly to Siem Reap?

On average, it takes 35h 55m 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 50h 14m.

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.

$1,083 Cheap Flights from Washington, D.C. to Siem Reap in 2026

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

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:35 pm - 10:55 am

IAD

SAI

32h 20m

2 stops

2:10 pm - 9:05 am

SAI

IAD

30h 55m

2 stops

$1,346Multiple Airlines

Sat, Oct 31 - Sat, Nov 28

3:10 pm - 11:15 am

IAD

SAI

33h 05m

2 stops

3:10 pm - 9:45 am

SAI

IAD

29h 35m

2 stops

$1,589Multiple Airlines

Thu, Jul 23 - Thu, Jul 30

8:05 pm - 9:15 am

IAD

SAI

26h 10m

2 stops

2:10 pm - 8:20 am

SAI

IAD

30h 10m

3 stops

$1,775Multiple Airlines

Sat, Oct 31 - Sat, Nov 28

8:05 pm - 9:45 pm

IAD

SAI

38h 40m

3 stops

2:10 pm - 8:20 am

SAI

IAD

30h 10m

3 stops

$1,860Multiple Airlines

Sat, Oct 31 - Sat, Nov 28

8:16 am - 9:30 pm

BWI

SAI

50h 14m

3 stops

11:50 pm - 12:28 am

SAI

BWI

35h 38m

3 stops

$2,617Emirates

Thu, Jul 23 - Thu, Jul 30

7:55 am - 9:40 am

DCA

SAI

38h 45m

2 stops

10:30 am - 10:30 pm

SAI

DCA

47h 00m

2 stops

$2,648United Airlines

Sat, Jul 4 - Fri, Jul 10

6:30 am - 9:40 am

BWI

SAI

40h 10m

2 stops

10:30 am - 7:10 am

SAI

BWI

55h 40m

2 stops

$2,739United Airlines

Sat, Jul 4 - Fri, Jul 10

6:50 pm - 9:40 am

BWI

SAI

51h 50m

3 stops

4:00 pm - 5:43 pm

SAI

BWI

36h 43m

2 stops

$3,070Singapore Airlines

Sat, Jul 4 - Fri, Jul 10

2:55 pm - 9:30 pm

DCA

SAI

43h 35m

3 stops

11:50 pm - 10:54 pm

SAI

DCA

34h 04m

3 stops

$3,229Emirates

Thu, Jul 23 - Thu, Jul 30

7:23 pm - 9:40 am

BWI

SAI

51h 17m

2 stops

10:30 am - 5:50 pm

SAI

BWI

42h 20m

2 stops

$3,477Singapore Airlines

Thu, Jul 23 - Thu, Jul 30

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Emirates flights from Washington, D.C. to Siem Reap

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

Emirates

Jul 23

BWI8:16 amBaltimore/Washington

50h 14m

3 stops

SAI9:30 pmSiem Reap–Angkor Intl

Jul 30

SAI11:50 pmSiem Reap–Angkor Intl

35h 38m

3 stops

BWI12:28 amBaltimore/Washington

$2,617

Emirates

Jul 23

DCA2:55 pmWashington, D.C. Reagan-National

43h 35m

3 stops

SAI9:30 pmSiem Reap–Angkor Intl

Jul 30

SAI11:50 pmSiem Reap–Angkor Intl

34h 04m

3 stops

DCA10:54 pmWashington, D.C. Reagan-National

$3,229

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

Jul 4

DCA7:55 amWashington, D.C. Reagan-National

38h 45m

2 stops

SAI9:40 amSiem Reap–Angkor Intl

Jul 10

SAI10:30 amSiem Reap–Angkor Intl

47h 00m

2 stops

DCA10:30 pmWashington, D.C. Reagan-National

$2,648

United Airlines

Jul 4

BWI6:30 amBaltimore/Washington

40h 10m

2 stops

SAI9:40 amSiem Reap–Angkor Intl

Jul 10

SAI10:30 amSiem Reap–Angkor Intl

55h 40m

2 stops

BWI7:10 amBaltimore/Washington

$2,739

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sat 10/31

3:35 pm-10:55 am

2 stops32h 20m

Siem Reap–Angkor Intl

Sat 11/28

2:10 pm-9:05 am

2 stops30h 55m

$1,346

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 7/23

3:10 pm-11:15 am

2 stops33h 05m

Siem Reap–Angkor Intl

Thu 7/30

3:10 pm-9:45 am

2 stops29h 35m

$1,589

Quickest round-trip

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sat 10/31

8:05 pm-9:15 am

2 stops26h 10m

Siem Reap–Angkor Intl

Sat 11/28

2:10 pm-8:20 am

3 stops30h 10m

$1,775

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sat 10/31

8:05 pm-9:45 pm

3 stops38h 40m

Siem Reap–Angkor Intl

Sat 11/28

2:10 pm-8:20 am

3 stops30h 10m

$1,860

BaltimoreSiem Reap

BWI - SAI

BWISAI

Baltimore/Washington

Thu 7/23

8:16 am-9:30 pm

3 stops50h 14m

Siem Reap–Angkor Intl

Thu 7/30

11:50 pm-12:28 am

3 stops35h 38m

$2,617

Washington, D.C.Siem Reap

DCA - SAI

DCASAI

Washington, D.C. Reagan-National

Sat 7/4

7:55 am-9:40 am

2 stops38h 45m

Siem Reap–Angkor Intl

Fri 7/10

10:30 am-10:30 pm

2 stops47h 00m

$2,648

BaltimoreSiem Reap

BWI - SAI

BWISAI

Baltimore/Washington

Sat 7/4

6:30 am-9:40 am

2 stops40h 10m

Siem Reap–Angkor Intl

Fri 7/10

10:30 am-7:10 am

2 stops55h 40m

$2,739

BaltimoreSiem Reap

BWI - SAI

BWISAI

Baltimore/Washington

Sat 7/4

6:50 pm-9:40 am

3 stops51h 50m

Siem Reap–Angkor Intl

Fri 7/10

4:00 pm-5:43 pm

2 stops36h 43m

$3,070

Washington, D.C.Siem Reap

DCA - SAI

DCASAI

Washington, D.C. Reagan-National

Thu 7/23

2:55 pm-9:30 pm

3 stops43h 35m

Siem Reap–Angkor Intl

Thu 7/30

11:50 pm-10:54 pm

3 stops34h 04m

$3,229

BaltimoreSiem Reap

BWI - SAI

BWISAI

Baltimore/Washington

Thu 7/23

7:23 pm-9:40 am

2 stops51h 17m

Siem Reap–Angkor Intl

Thu 7/30

10:30 am-5:50 pm

2 stops42h 20m

$3,477

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted 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

Airlines

Other information

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

Singapore Airlines, Emirates, and United Airlines are the most popular carriers operating from Washington, D.C. to Siem Reap–Angkor Intl

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	33h 05m
Direct flights	None

The fastest flight from Washington, D.C. to Siem Reap takes 33h 05m

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.

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Frequently asked questions about flying from Washington, D.C. to Siem Reap

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 33h 05m.
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 $1,083

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. to Siem Reap departing on 7/1. 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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Emirates flights from Washington, D.C. to Siem Reap

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

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

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

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See travel insights to Siem Reap from

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

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

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

Frequently asked questions about flying from Washington, D.C. to Siem Reap

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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