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

Average flight duration from Washington, D.C. to Region of Siem Reap depends on which airport you fly into and out of. Flying from Washington, D.C. to Siem Reap is 33h 25m on average, while flying from Baltimore to Siem Reap is 39h 12m on average. Siem Reap is the most popular airport in Region of Siem Reap.

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

Prices for flights from Washington, D.C. to Siem Reap are refreshed on a daily basis.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, 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.

What documentation or ID do you need to fly to Siem Reap?

The required travel and health documents for your Siem Reap trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Siem Reap. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$682 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.

8:05 pm - 9:15 am

IAD

SAI

25h 10m

2 stops

1:20 pm - 3:55 pm

SAI

IAD

38h 35m

2 stops

$1,381Multiple Airlines

Thu, Nov 5 - Sat, Nov 14

8:30 am - 3:55 pm

BWI

SAI

43h 25m

2 stops

4:45 pm - 5:29 am

SAI

BWI

48h 44m

2 stops

$1,559Singapore Airlines

Thu, Nov 5 - Sat, Nov 14

3:34 pm - 9:10 pm

IAD

SAI

41h 36m

3 stops

11:50 pm - 8:10 am

SAI

IAD

68h 20m

2 stops

$1,649Emirates

Thu, Nov 5 - Sat, Nov 14

9:00 pm - 12:15 pm

IAD

SAI

52h 15m

2 stops

7:25 pm - 3:40 pm

SAI

IAD

31h 15m

2 stops

$1,938Multiple Airlines

Fri, Jul 31 - Sun, Apr 4

8:30 am - 3:55 pm

BWI

SAI

43h 25m

2 stops

4:45 pm - 5:29 am

SAI

BWI

48h 44m

3 stops

$1,955Singapore Airlines

Thu, Nov 5 - Sat, Nov 14

3:30 pm - 9:10 pm

DCA

SAI

41h 40m

3 stops

11:50 pm - 8:43 pm

SAI

DCA

32h 53m

3 stops

$1,963Emirates

Thu, Nov 5 - Sat, Nov 14

3:34 pm - 9:10 pm

IAD

SAI

41h 36m

3 stops

11:50 pm - 10:43 pm

SAI

IAD

34h 53m

3 stops

$2,003Emirates

Thu, Nov 5 - Sat, Nov 14

12:35 pm - 9:10 pm

BWI

SAI

44h 35m

3 stops

11:50 pm - 9:23 pm

SAI

BWI

33h 33m

3 stops

$2,020Emirates

Thu, Nov 5 - Sat, Nov 14

9:00 pm - 11:15 am

IAD

SAI

51h 15m

3 stops

12:55 pm - 3:40 pm

SAI

IAD

37h 45m

2 stops

$2,023Multiple Airlines

Fri, Jul 31 - Sun, Apr 4

8:35 pm - 6:45 pm

BWI

SAI

34h 10m

2 stops

7:25 pm - 6:45 pm

SAI

BWI

35h 20m

2 stops

$3,317British Airways

Sun, Dec 20 - 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

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

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

Singapore Airlines

Nov 5

BWI8:30 amBaltimore/Washington

43h 25m

2 stops

SAI3:55 pmSiem Reap–Angkor Intl

Nov 14

SAI4:45 pmSiem Reap–Angkor Intl

48h 44m

2 stops

BWI5:29 amBaltimore/Washington

$1,559

Singapore Airlines

Nov 5

BWI8:30 amBaltimore/Washington

43h 25m

2 stops

SAI3:55 pmSiem Reap–Angkor Intl

Nov 14

SAI4:45 pmSiem Reap–Angkor Intl

48h 44m

3 stops

BWI5:29 amBaltimore/Washington

$1,955

Singapore Airlines

Nov 5

DCA9:30 amWashington, D.C. Reagan-National

42h 25m

2 stops

SAI3:55 pmSiem Reap–Angkor Intl

Nov 14

SAI10:45 amSiem Reap–Angkor Intl

45h 15m

2 stops

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

$2,448

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

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

Emirates

Nov 5

IAD3:34 pmWashington, D.C. Dulles Intl

41h 36m

3 stops

SAI9:10 pmSiem Reap–Angkor Intl

Nov 14

SAI11:50 pmSiem Reap–Angkor Intl

68h 20m

2 stops

IAD8:10 amWashington, D.C. Dulles Intl

$1,649

Emirates

Nov 5

DCA3:30 pmWashington, D.C. Reagan-National

41h 40m

3 stops

SAI9:10 pmSiem Reap–Angkor Intl

Nov 14

SAI11:50 pmSiem Reap–Angkor Intl

32h 53m

3 stops

DCA8:43 pmWashington, D.C. Reagan-National

$1,963

Emirates

Nov 5

IAD3:34 pmWashington, D.C. Dulles Intl

41h 36m

3 stops

SAI9:10 pmSiem Reap–Angkor Intl

Nov 14

SAI11:50 pmSiem Reap–Angkor Intl

34h 53m

3 stops

IAD10:43 pmWashington, D.C. Dulles Intl

$2,003

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

Quickest round-trip

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 11/5

8:05 pm-9:15 am

2 stops25h 10m

Siem Reap–Angkor Intl

Sat 11/14

1:20 pm-3:55 pm

2 stops38h 35m

$1,381

BaltimoreSiem Reap

BWI - SAI

BWISAI

Baltimore/Washington

Thu 11/5

8:30 am-3:55 pm

2 stops43h 25m

Siem Reap–Angkor Intl

Sat 11/14

4:45 pm-5:29 am

2 stops48h 44m

$1,559

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 11/5

3:34 pm-9:10 pm

3 stops41h 36m

Siem Reap–Angkor Intl

Sat 11/14

11:50 pm-8:10 am

2 stops68h 20m

$1,649

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Fri 7/31

9:00 pm-12:15 pm

2 stops52h 15m

Siem Reap–Angkor Intl

Sun 4/4

7:25 pm-3:40 pm

2 stops31h 15m

$1,938

BaltimoreSiem Reap

BWI - SAI

BWISAI

Baltimore/Washington

Thu 11/5

8:30 am-3:55 pm

2 stops43h 25m

Siem Reap–Angkor Intl

Sat 11/14

4:45 pm-5:29 am

3 stops48h 44m

$1,955

Washington, D.C.Siem Reap

DCA - SAI

DCASAI

Washington, D.C. Reagan-National

Thu 11/5

3:30 pm-9:10 pm

3 stops41h 40m

Siem Reap–Angkor Intl

Sat 11/14

11:50 pm-8:43 pm

3 stops32h 53m

$1,963

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 11/5

3:34 pm-9:10 pm

3 stops41h 36m

Siem Reap–Angkor Intl

Sat 11/14

11:50 pm-10:43 pm

3 stops34h 53m

$2,003

BaltimoreSiem Reap

BWI - SAI

BWISAI

Baltimore/Washington

Thu 11/5

12:35 pm-9:10 pm

3 stops44h 35m

Siem Reap–Angkor Intl

Sat 11/14

11:50 pm-9:23 pm

3 stops33h 33m

$2,020

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Fri 7/31

9:00 pm-11:15 am

3 stops51h 15m

Siem Reap–Angkor Intl

Sun 4/4

12:55 pm-3:40 pm

2 stops37h 45m

$2,023

BaltimoreSiem Reap

BWI - SAI

BWISAI

Baltimore/Washington

Sun 12/20

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

$3,317

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted by cheapest first

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

Singapore Airlines, Qatar Airways, and United Airlines are the most popular carriers operating from Washington, D.C. to Siem Reap

Cheap Washington, D.C. to Region of Siem Reap flight deals and tips

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

Fastest flight time	25h 10m
Direct flights	None

The fastest flight from Washington, D.C. to Region of Siem Reap takes 25h 10m

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

Search flight deals

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

When did momondo last update prices for flights from Washington, D.C. to Siem Reap?
Prices for flights from Washington, D.C. to Siem Reap are refreshed on a daily basis.
How old do you have to be to fly from Washington, D.C. to Siem Reap?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, 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.
What documentation or ID do you need to fly to Siem Reap?
The required travel and health documents for your Siem Reap trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Siem Reap. We recommend that you seek guidance from your airline or a reliable 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?

It is quick and easy to find Washington, D.C. to Siem Reap flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Siem Reap that suits you.

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

Yes. momondo enables you to select and highlight flights to Siem Reap from Washington, D.C. with this policy.

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

momondo helps you find the best flight between Washington, D.C. and Siem Reap by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Washington, D.C. to Siem Reap right now. Can momondo alert me if prices change?

Price alerts on flights to Siem Reap from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Region of 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

Thu 8/13

Thu 8/20

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 Siem Reap

Popular cities

Other flights from Washington, D.C.

Other flights to Siem Reap

Airlines

Cabin classes

Complete your trip

Feeling lucky

Popular cities in Siem Reap

Flights to Phnom Penh

Flights to Siem Reapfrom $703

Flights to Krong Preah Sihanoukfrom $1,312

Cheap flights from Washington, D.C. to Siem Reap from $682

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 10/14. 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

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

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

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

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

Our best Emirates deals on Washington, D.C. to Region of 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 Region of Siem Reap

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

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

Cheap Washington, D.C. to Region of Siem Reap flight deals and tips

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

Popular cities in Siem Reap

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

Washington, D.C. flight routes

According to popular flight searches on momondo this year

Region of Siem Reap flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Siem Reap

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

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.

Complete your trip to Siem Reap

Explore popular destinations other users love

According to popular flight searches on momondo this year