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Cheap flights from District of Columbia to Siem Reap from $630

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from District of Columbia to Siem Reap departing on 3/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from District of Columbia to Siem Reap

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:45 pm - 9:00 am
IAD
-
SAI
24h 15m
2 stops
Multiple Airlines Logo
7:30 pm - 11:35 am
SAI
-
IAD
27h 05m
2 stops
$1,428Multiple Airlines
Sat, Apr 25 - Sun, May 3
Etihad Airways Logo
3:10 pm - 9:00 am
IAD
-
SAI
30h 50m
2 stops
Etihad Airways Logo
7:30 pm - 9:45 am
SAI
-
IAD
49h 15m
2 stops
$1,451Etihad Airways
Thu, Jul 30 - Thu, Aug 13
Multiple Airlines Logo
8:20 pm - 4:25 pm
IAD
-
SAI
33h 05m
3 stops
Multiple Airlines Logo
6:30 pm - 4:05 pm
SAI
-
IAD
56h 35m
2 stops
$1,454Multiple Airlines
Sat, Apr 25 - Sun, May 3
Multiple Airlines Logo
10:55 am - 9:30 pm
IAD
-
SAI
47h 35m
2 stops
Multiple Airlines Logo
7:30 pm - 8:40 am
SAI
-
IAD
48h 10m
2 stops
$1,750Multiple Airlines
Sun, Mar 29 - Sun, Apr 5
Multiple Airlines Logo
1:20 pm - 6:45 pm
IAD
-
SAI
42h 25m
2 stops
Multiple Airlines Logo
7:30 pm - 11:35 am
SAI
-
IAD
51h 05m
2 stops
$1,857Multiple Airlines
Sat, May 23 - Sat, May 30
Emirates Logo
10:55 am - 12:15 pm
IAD
-
SAI
38h 20m
2 stops
Emirates Logo
11:50 pm - 12:29 am
SAI
-
IAD
35h 39m
3 stops
$1,916Emirates
Thu, Jul 30 - Thu, Aug 13
Multiple Airlines Logo
11:00 am - 4:25 pm
IAD
-
SAI
66h 25m
3 stops
Multiple Airlines Logo
7:05 pm - 3:40 pm
SAI
-
IAD
55h 35m
2 stops
$1,928Multiple Airlines
Sun, Mar 29 - Sun, Apr 5
Multiple Airlines Logo
10:55 am - 6:45 pm
IAD
-
SAI
44h 50m
2 stops
Multiple Airlines Logo
1:00 pm - 8:40 am
SAI
-
IAD
54h 40m
3 stops
$1,962Multiple Airlines
Sun, Mar 29 - Sun, Apr 5
Multiple Airlines Logo
8:20 pm - 4:25 pm
IAD
-
SAI
33h 05m
3 stops
Multiple Airlines Logo
7:30 pm - 4:05 pm
SAI
-
IAD
31h 35m
2 stops
$2,065Multiple Airlines
Sat, May 23 - Sat, May 30
Emirates Logo
2:55 pm - 9:30 pm
DCA
-
SAI
43h 35m
3 stops
Emirates Logo
11:50 pm - 10:26 pm
SAI
-
DCA
33h 36m
3 stops
$2,720Emirates
Thu, Jul 30 - Thu, Aug 13

Emirates flights from District of Columbia to Siem Reap

Our best Emirates deals on District of Columbia to Siem Reap flight tickets
Emirates
Jul 30
IAD10:55 amWashington, D.C. Dulles Intl
38h 20m
2 stops
SAI12:15 pmSiem Reap–Angkor Intl
Aug 13
SAI11:50 pmSiem Reap–Angkor Intl
35h 39m
3 stops
IAD12:29 amWashington, D.C. Dulles Intl
$1,916
Emirates
Jul 30
DCA2:55 pmWashington, D.C. Reagan-National
43h 35m
3 stops
SAI9:30 pmSiem Reap–Angkor Intl
Aug 13
SAI11:50 pmSiem Reap–Angkor Intl
33h 36m
3 stops
DCA10:26 pmWashington, D.C. Reagan-National
$2,720

momondo Fare Finder

 
Customize your flight search to find flights from District of Columbia 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, momondo users made 832,500 searches. Data last updated March 2, 2026.
Use the filters below to find and compare flights from District of Columbia to Siem Reap that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sat 4/25

9:45 pm-9:00 am

2 stops24h 15m

Siem Reap–Angkor Intl

Sun 5/3

7:30 pm-11:35 am

2 stops27h 05m

$1,428

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 7/30

3:10 pm-9:00 am

2 stops30h 50m

Siem Reap–Angkor Intl

Thu 8/13

7:30 pm-9:45 am

2 stops49h 15m

$1,451

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sat 4/25

8:20 pm-4:25 pm

3 stops33h 05m

Siem Reap–Angkor Intl

Sun 5/3

6:30 pm-4:05 pm

2 stops56h 35m

$1,454

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sun 3/29

10:55 am-9:30 pm

2 stops47h 35m

Siem Reap–Angkor Intl

Sun 4/5

7:30 pm-8:40 am

2 stops48h 10m

$1,750

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sat 5/23

1:20 pm-6:45 pm

2 stops42h 25m

Siem Reap–Angkor Intl

Sat 5/30

7:30 pm-11:35 am

2 stops51h 05m

$1,857

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Thu 7/30

10:55 am-12:15 pm

2 stops38h 20m

Siem Reap–Angkor Intl

Thu 8/13

11:50 pm-12:29 am

3 stops35h 39m

$1,916

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sun 3/29

11:00 am-4:25 pm

3 stops66h 25m

Siem Reap–Angkor Intl

Sun 4/5

7:05 pm-3:40 pm

2 stops55h 35m

$1,928

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sun 3/29

10:55 am-6:45 pm

2 stops44h 50m

Siem Reap–Angkor Intl

Sun 4/5

1:00 pm-8:40 am

3 stops54h 40m

$1,962

Washington, D.C.Siem Reap

IAD - SAI

IADSAI

Washington, D.C. Dulles Intl

Sat 5/23

8:20 pm-4:25 pm

3 stops33h 05m

Siem Reap–Angkor Intl

Sat 5/30

7:30 pm-4:05 pm

2 stops31h 35m

$2,065

Washington, D.C.Siem Reap

DCA - SAI

DCASAI

Washington, D.C. Reagan-National

Thu 7/30

2:55 pm-9:30 pm

3 stops43h 35m

Siem Reap–Angkor Intl

Thu 8/13

11:50 pm-10:26 pm

3 stops33h 36m

$2,720

Flights are sorted by cheapest round-trip flights first.

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How to get the cheapest flight ticket from District of Columbia 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

What is the cheapest airline that flies from District of Columbia to Siem Reap–Angkor Intl?

Qatar Airways is the most popular carrier operating from District of Columbia to Siem Reap–Angkor Intl

Cheap District of Columbia to Siem Reap flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from District of Columbia to Siem Reap

Fastest flight time

30h 40m

Direct flights

None
The fastest flight from District of Columbia to Siem Reap takes 30h 40m
There are no direct flights from District of Columbia to Siem Reap. There are no popular flight routes from District of Columbia to Siem Reap.
Search flight deals

  • When did momondo last update prices for flights from District of Columbia to Siem Reap–Angkor Intl Airport?

    Prices for flights from District of Columbia to Siem Reap–Angkor Intl Airport are refreshed on a daily basis.

  • How old do you have to be to fly from District of Columbia 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 District of Columbia to Siem Reap–Angkor Intl Airport.

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

    The required travel and health documents for your Siem Reap–Angkor Intl Airport 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–Angkor Intl Airport. 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 District of Columbia to Siem Reap?

Finding the right flight to Siem Reap from District of Columbia is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Siem Reap quick and easy, saving you time and money.

Can I find flights from District of Columbia to Siem Reap with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for District of Columbia to Siem Reap flights to just show those with flexible booking policies.

How can momondo help me find flights from District of Columbia to Siem Reap?

Once all potential District of Columbia to Siem Reap flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from District of Columbia to Siem Reap right now. Can momondo alert me if prices change?

Yes. momondo can track prices for District of Columbia to Siem Reap flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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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.
First Class to Siem Reap
Business Class to Siem Reap