How long does it take to fly to Siem Reap?

On average, it takes 33h 40m 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 39h 12m.

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.

$523 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

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:15 am - 6:55 pm

IAD

SAI

30h 40m

2 stops

9:40 am - 10:00 pm

SAI

IAD

23h 20m

2 stops

$1,173Multiple Airlines

Wed, Sep 16 - Mon, Sep 21

1:15 am - 6:45 pm

IAD

SAI

30h 30m

2 stops

7:25 pm - 8:55 pm

SAI

IAD

37h 30m

2 stops

$1,210Multiple Airlines

Sat, Oct 24 - Sun, Nov 1

1:50 am - 6:55 pm

IAD

SAI

30h 05m

2 stops

9:40 am - 10:00 pm

SAI

IAD

23h 20m

2 stops

$1,347Multiple Airlines

Fri, Aug 28 - Sat, Sep 5

1:15 am - 4:10 pm

IAD

SAI

27h 55m

3 stops

7:25 pm - 8:55 pm

SAI

IAD

37h 30m

2 stops

$1,407Multiple Airlines

Sat, Oct 24 - Sun, Nov 1

1:15 am - 6:55 pm

IAD

SAI

30h 40m

2 stops

7:10 pm - 7:30 pm

SAI

IAD

35h 20m

3 stops

$1,539Multiple Airlines

Wed, Sep 16 - Mon, Sep 21

8:23 am - 4:55 pm

IAD

SAI

45h 32m

3 stops

6:40 pm - 9:13 pm

SAI

IAD

38h 33m

3 stops

$1,679ANA

Sun, Oct 25 - Sun, Nov 1

7:00 am - 9:40 am

BWI

SAI

39h 40m

3 stops

10:30 am - 4:35 pm

SAI

BWI

41h 05m

2 stops

$2,703Singapore Airlines

Sat, Aug 29 - Sat, Sep 5

8:37 am - 3:55 pm

BWI

SAI

43h 18m

2 stops

4:45 pm - 5:21 am

SAI

BWI

48h 36m

2 stops

$2,934Singapore Airlines

Tue, Dec 15 - Thu, Dec 31

8:35 pm - 6:45 pm

BWI

SAI

34h 10m

2 stops

7:25 pm - 6:45 pm

SAI

BWI

35h 20m

2 stops

$3,150British Airways

Wed, Dec 16 - Wed, Jan 6

8:35 pm - 6:45 pm

BWI

SAI

34h 10m

2 stops

7:25 pm - 6:45 pm

SAI

BWI

35h 20m

2 stops

$3,261British Airways

Wed, Dec 16 - Tue, Jan 5

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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

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

Austrian Airlines

Dec 15

IAD6:10 pmWashington, D.C. Dulles Intl

51h 05m

2 stops

SAI9:15 amSiem Reap–Angkor Intl

Dec 31

SAI9:55 amSiem Reap–Angkor Intl

40h 15m

2 stops

IAD2:10 pmWashington, D.C. Dulles Intl

$1,998

Austrian Airlines

Dec 16

IAD6:10 pmWashington, D.C. Dulles Intl

36h 35m

2 stops

SAI6:45 pmSiem Reap–Angkor Intl

Dec 31

SAI9:55 amSiem Reap–Angkor Intl

40h 15m

2 stops

IAD2:10 pmWashington, D.C. Dulles Intl

$2,393

Austrian Airlines

Dec 17

IAD6:10 pmWashington, D.C. Dulles Intl

36h 35m

2 stops

SAI6:45 pmSiem Reap–Angkor Intl

Dec 31

SAI9:55 amSiem Reap–Angkor Intl

40h 15m

2 stops

IAD2:10 pmWashington, D.C. Dulles Intl

$2,663

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

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

Lufthansa

Dec 15

IAD10:55 pmWashington, D.C. Dulles Intl

31h 50m

2 stops

SAI6:45 pmSiem Reap–Angkor Intl

Jan 6

SAI4:45 pmSiem Reap–Angkor Intl

34h 50m

2 stops

IAD3:35 pmWashington, D.C. Dulles Intl

$2,274

Lufthansa

Dec 16

IAD10:55 pmWashington, D.C. Dulles Intl

31h 50m

2 stops

SAI6:45 pmSiem Reap–Angkor Intl

Jan 6

SAI4:45 pmSiem Reap–Angkor Intl

34h 50m

2 stops

IAD3:35 pmWashington, D.C. Dulles Intl

$2,544

Lufthansa

Dec 17

IAD10:55 pmWashington, D.C. Dulles Intl

31h 50m

2 stops

SAI6:45 pmSiem Reap–Angkor Intl

Jan 6

SAI4:45 pmSiem Reap–Angkor Intl

39h 20m

2 stops

IAD8:05 pmWashington, D.C. Dulles Intl

$3,149

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

Wed 9/16

1:15 am-6:55 pm

2 stops30h 40m

Siem Reap–Angkor Intl

Mon 9/21

9:40 am-10:00 pm

2 stops23h 20m

$1,173

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sat 10/24

1:15 am-6:45 pm

2 stops30h 30m

Siem Reap–Angkor Intl

Sun 11/1

7:25 pm-8:55 pm

2 stops37h 30m

$1,210

Quickest round-trip

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Fri 8/28

1:50 am-6:55 pm

2 stops30h 05m

Siem Reap–Angkor Intl

Sat 9/5

9:40 am-10:00 pm

2 stops23h 20m

$1,347

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sat 10/24

1:15 am-4:10 pm

3 stops27h 55m

Siem Reap–Angkor Intl

Sun 11/1

7:25 pm-8:55 pm

2 stops37h 30m

$1,407

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Wed 9/16

1:15 am-6:55 pm

2 stops30h 40m

Siem Reap–Angkor Intl

Mon 9/21

7:10 pm-7:30 pm

3 stops35h 20m

$1,539

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sun 10/25

8:23 am-4:55 pm

3 stops45h 32m

Siem Reap–Angkor Intl

Sun 11/1

6:40 pm-9:13 pm

3 stops38h 33m

$1,679

BaltimoreSiem Reap

BWI - SAI

BWISAI

Baltimore/Washington

Sat 8/29

7:00 am-9:40 am

3 stops39h 40m

Siem Reap–Angkor Intl

Sat 9/5

10:30 am-4:35 pm

2 stops41h 05m

$2,703

BaltimoreSiem Reap

BWI - SAI

BWISAI

Baltimore/Washington

Tue 12/15

8:37 am-3:55 pm

2 stops43h 18m

Siem Reap–Angkor Intl

Thu 12/31

4:45 pm-5:21 am

2 stops48h 36m

$2,934

BaltimoreSiem Reap

BWI - SAI

BWISAI

Baltimore/Washington

Wed 12/16

8:35 pm-6:45 pm

2 stops34h 10m

Siem Reap–Angkor Intl

Wed 1/6

7:25 pm-6:45 pm

2 stops35h 20m

$3,150

BaltimoreSiem Reap

BWI - SAI

BWISAI

Baltimore/Washington

Wed 12/16

8:35 pm-6:45 pm

2 stops34h 10m

Siem Reap–Angkor Intl

Tue 1/5

7:25 pm-6:45 pm

2 stops35h 20m

$3,261

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 is the most popular carrier 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	30h 40m
Direct flights	None

The fastest flight from Washington, D.C. to Siem Reap takes 30h 40m

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

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 30h 40m.
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.

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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Wed 8/26

Wed 9/2

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Cambodia

Cabin classes

Other Cambodia destinations

Other flights from Washington, D.C.

Complete your trip

Feeling lucky

Cabin classes currently available on flights to Siem Reap

First Class to Siem Reap

Business Class to Siem Reap

Cheap flights from Washington, D.C. to Siem Reap from $523

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 9/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

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

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

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

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

momondo Fare Finder

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

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

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.

Popular cities in Cambodia

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from Washington, D.C.

According to popular flight searches on momondo this year

Complete your trip to Siem Reap

Explore popular destinations other users love

According to popular flight searches on momondo this year