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Cheap flights from Washington, D.C. Reagan-National Airport to Phnom Penh from $1,247

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. Reagan-National Airport to Phnom Penh departing on 12/13. 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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Find the cheapest flights from Washington, D.C. Reagan-National Airport to Phnom Penh

Cheap round-trip flights

Multiple Airlines Logo
11:05 am - 6:30 amDCA-PNH
32h 25m3 stops
Multiple Airlines Logo
7:50 pm - 7:45 pmPNH-DCA
35h 55m3 stops
$2,507Multiple Airlines
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jue., oct. 30 - jue., nov. 6

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Reagan-National Airport to Phnom Penh 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 septiembre 16, 2025.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Phnom Penh that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Phnom Penh

DCA - PNH

DCAPNH

Washington, D.C. Reagan-National

jue. 10/30

11:05 am-6:30 am

3 stops32h 25m

Phnom Penh Pochentong

jue. 11/6

7:50 pm-7:45 pm

3 stops35h 55m

$2,507

Washington, D.C.Phnom Penh

DCA - PNH

DCAPNH

Washington, D.C. Reagan-National

sáb. 12/13

11:05 am-6:30 am

3 stops31h 25m

$1,247

Washington, D.C.Phnom Penh

DCA - PNH

DCAPNH

Washington, D.C. Reagan-National

sáb. 12/13

6:59 am-6:30 am

2 stops35h 31m

$2,672

Washington, D.C.Phnom Penh

DCA - PNH

DCAPNH

Washington, D.C. Reagan-National

vie. 10/31

4:55 pm-6:30 am

2 stops50h 35m

$9,535

Washington, D.C.Phnom Penh

DCA - PNH

DCAPNH

Washington, D.C. Reagan-National

vie. 12/12

8:35 pm-6:30 am

2 stops45h 55m

$9,550

Washington, D.C.Phnom Penh

DCA - PNH

DCAPNH

Washington, D.C. Reagan-National

lun. 1/5

6:50 pm-6:25 pm

2 stops59h 35m

$9,551

Washington, D.C.Phnom Penh

DCA - PNH

DCAPNH

Washington, D.C. Reagan-National

lun. 1/5

8:35 pm-6:25 pm

2 stops57h 50m

$9,577

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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How to get the cheapest flight ticket from Washington, D.C. Reagan-National Airport to Phnom Penh

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 day to depart on your flight to Phnom Penh?

The cheapest day to depart from Washington, D.C. Reagan-National Airport to Phnom Penh is on a Saturday. Travelers who choose to depart for Phnom Penh on a Saturday will often find tickets for as low as $1,543. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from Washington, D.C. Reagan-National Airport to Phnom Penh for around $1,705.

What is the cheapest time of day to depart on your flight to Phnom Penh?

According to our data, the cheapest time of day to fly to Phnom Penh is in the evening. momondo users have found flights departing from Washington, D.C. Reagan-National Airport to Phnom Penh in the evening for as low as $1,316. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Phnom Penh are more costly at noon, with an average ticket price of $1,825. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

When to book flights from Washington, D.C. Reagan-National Airport to Phnom Penh

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Reagan-National Airport to Phnom Penh according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Reagan-National Airport to Phnom Penh (DCA to PNH) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Reagan-National Airport to Phnom Penh

Direct flights

None
There are no direct flights from Washington, D.C. Reagan-National Airport to Phnom Penh. There are no popular flight routes from Washington, D.C. Reagan-National Airport to Phnom Penh.
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  • How far is Washington, D.C. Reagan-National to Phnom Penh Pochentong by plane?

    Washington, D.C. Reagan-National and Phnom Penh Pochentong are 8945.0 mi apart from one another. A reasonable flight in good conditions will take 32h 25m.

  • When did momondo last update prices for flights from Washington, D.C. Reagan-National Airport to Phnom Penh Pochentong Airport?

    Prices for flights from Washington, D.C. Reagan-National Airport to Phnom Penh Pochentong Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Washington, D.C. Reagan-National Airport to Phnom Penh Pochentong Airport?

  • How old do you have to be to fly from Washington, D.C. Reagan-National Airport to Phnom Penh Pochentong Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. Reagan-National Airport to Phnom Penh Pochentong Airport.

  • What documentation or ID do you need to fly to Phnom Penh Pochentong Airport?

    The required travel and health documents for your Phnom Penh Pochentong 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 Phnom Penh Pochentong Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Washington, D.C. Reagan-National Airport to Phnom Penh?

Best airlines flying from Washington, D.C. Reagan-National Airport to Phnom Penh

Compare and see reviews for airlines that fly from Washington, D.C. Reagan-National Airport to Phnom Penh with momondo
Airline
Rating
Free Cancellation
Price
Asiana AirlinesPriceFrom $1,415Free CancellationRating
8.2
480 reviews
Search Asiana Airlines flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Phnom Penh from Washington, D.C..

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

Yes. momondo allows you to filter the results for Washington, D.C. to Phnom Penh flights to just show those with flexible booking policies.

How can momondo help me find flights from Washington, D.C. to Phnom Penh?

Once all potential Washington, D.C. to Phnom Penh 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 Washington, D.C. to Phnom Penh right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Phnom Penh from Washington, D.C.. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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