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Phnom Penh

$395+ Cheap flights from Washington, D.C. (WAS) to Phnom Penh (PNH)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — PNH
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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Cheap flight deals from Washington, D.C. to Phnom Penh

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Phnom Penh (PNH). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 20, 2025.

Round-trip from

$971
(oojo)

One-way from

$395
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$1,282
From Washington, D.C. (WAS) to Phnom Penh Pochentong
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One-way flight from Washington, D.C. (WAS) to Phnom Penh Pochentong
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Highest demand for flights based on searches. 10% potential increase in price ($193 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($64 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Washington, D.C. to Phnom Penh

Cheapest flights from Washington, D.C. to Phnom Penh
Explore the most affordable flight options available from Washington, D.C. to Phnom Penh. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2025.

This oojo deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2411:00 pmIAD - PNH
1 stop37h 10mAir China
Thu 11/612:25 amPNH - IAD
1 stop30h 05mAir China
Deal found 8/18$971
This Mytrip deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/45:45 amBWI - PNH
2 stops30h 30mMultiple Airlines
Sun 10/512:20 pmPNH - BWI
2 stops29h 15mMultiple Airlines
Deal found 8/18$1,083
This oojo deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/59:59 amDCA - PNH
2 stops48h 56mAsiana Airlines
Sun 11/1611:55 pmPNH - DCA
2 stops32h 05mAsiana Airlines
Deal found 8/19$1,094
This Gotogate deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/49:35 amIAD - PNH
2 stops26h 20mMultiple Airlines
Sun 10/511:55 pmPNH - IAD
2 stops44h 43mMultiple Airlines
Deal found 8/18$1,096
This SmartFares deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/15:00 pmDCA - PNH
2 stops42h 55mMultiple Airlines
Thu 12/411:55 pmPNH - DCA
2 stops32h 05mMultiple Airlines
Deal found 8/18$1,111
This Expedia deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/49:40 amDCA - PNH
2 stops26h 15mMultiple Airlines
Sun 10/511:55 pmPNH - DCA
2 stops33h 39mMultiple Airlines
Deal found 8/18$1,125
This oojo deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/48:59 amDCA - PNH
2 stops50h 56mAsiana Airlines
Sun 10/511:55 pmPNH - DCA
2 stops56h 19mAsiana Airlines
Deal found 8/18$1,137
This United deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/117:00 amDCA - PNH
2 stops43h 10mMultiple Airlines
Tue 9/166:55 pmPNH - DCA
2 stops56h 59mMultiple Airlines
Deal found 8/18$1,199
This Gurufare deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/47:43 amIAD - PNH
2 stops51h 12mMultiple Airlines
Fri 11/2111:55 pmPNH - IAD
2 stops42h 23mMultiple Airlines
Deal found 8/19$1,201
This oojo deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/59:59 amDCA - PNH
2 stops37h 26mEVA Air
Sun 11/1612:45 pmPNH - DCA
2 stops43h 15mEVA Air
Deal found 8/18$1,217
This oojo deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/247:48 pmIAD - PNH
2 stops49h 47mSingapore Airlines
Fri 11/77:40 pmPNH - IAD
2 stops46h 43mSingapore Airlines
Deal found 8/20$1,219
This United deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/16:03 pmIAD - PNH
2 stops30h 22mMultiple Airlines
Thu 12/42:40 pmPNH - IAD
2 stops28h 15mMultiple Airlines
Deal found 8/18$1,242

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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, Cheapflights users made 2,558,603 searches. Data last updated August 20, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Phnom Penh that are best for you.

Fly from

Washington, D.C.

Fly to

Phnom Penh

Route

Depart

Return

Price

Washington, D.C.Phnom Penh

IAD - PNH

IADPNH

Washington, D.C. Dulles Intl

Fri 10/24

11:00 pm-11:10 pm

1 stop37h 10m

Phnom Penh Pochentong

Thu 11/6

12:25 am-6:30 pm

1 stop30h 05m

$971

Washington, D.C.Phnom Penh

IAD - PNH

IADPNH

Washington, D.C. Dulles Intl

Mon 1/5

6:30 am-8:35 am

2 stops38h 05m

Phnom Penh Pochentong

Sat 1/31

2:40 pm-6:39 am

2 stops27h 59m

$1,049

BaltimorePhnom Penh

BWI - PNH

BWIPNH

Baltimore/Washington

Thu 9/4

5:45 am-11:15 pm

2 stops30h 30m

Phnom Penh Pochentong

Sun 10/5

12:20 pm-6:35 am

2 stops29h 15m

$1,083

Washington, D.C.Phnom Penh

DCA - PNH

DCAPNH

Washington, D.C. Reagan-National

Wed 11/5

9:59 am-10:55 pm

2 stops48h 56m

Phnom Penh Pochentong

Sun 11/16

11:55 pm-8:00 pm

2 stops32h 05m

$1,094

Washington, D.C.Phnom Penh

IAD - PNH

IADPNH

Washington, D.C. Dulles Intl

Thu 9/4

9:35 am-10:55 pm

2 stops26h 20m

Phnom Penh Pochentong

Sun 10/5

11:55 pm-9:38 am

2 stops44h 43m

$1,096

Washington, D.C.Phnom Penh

DCA - PNH

DCAPNH

Washington, D.C. Reagan-National

Sat 11/1

5:00 pm-10:55 pm

2 stops42h 55m

Phnom Penh Pochentong

Thu 12/4

11:55 pm-8:00 pm

2 stops32h 05m

$1,111

Washington, D.C.Phnom Penh

DCA - PNH

DCAPNH

Washington, D.C. Reagan-National

Thu 9/4

9:40 am-10:55 pm

2 stops26h 15m

Phnom Penh Pochentong

Sun 10/5

11:55 pm-10:34 pm

2 stops33h 39m

$1,125

Washington, D.C.Phnom Penh

DCA - PNH

DCAPNH

Washington, D.C. Reagan-National

Thu 9/4

8:59 am-10:55 pm

2 stops50h 56m

Phnom Penh Pochentong

Sun 10/5

11:55 pm-9:14 pm

2 stops56h 19m

$1,137

Washington, D.C.Phnom Penh

IAD - PNH

IADPNH

Washington, D.C. Dulles Intl

Thu 1/1

1:30 pm-2:40 pm

2 stops37h 10m

Phnom Penh Pochentong

Thu 1/29

7:15 pm-7:15 pm

2 stops36h 00m

$1,147

Washington, D.C.Phnom Penh

DCA - PNH

DCAPNH

Washington, D.C. Reagan-National

Thu 9/11

7:00 am-1:10 pm

2 stops43h 10m

Phnom Penh Pochentong

Tue 9/16

6:55 pm-4:54 pm

2 stops56h 59m

$1,199

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/19

Showing 1-10 of 45 results
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Best time to book a flight from Washington, D.C. to Phnom Penh

Have a flexible travel schedule? Discover the best time to fly to Phnom Penh from Washington, D.C. with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to Phnom Penh

What is the cheapest month to book a flight from Washington, D.C. to Phnom Penh?

Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to Phnom Penh (average of $985). Flying from Washington, D.C. to Phnom Penh in June is currently the most expensive (average of $1,544). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from WAS to PNH?

Find hourly flight availability from Washington, D.C. to Phnom Penh. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 20, 2025.

A simple way to save on the total cost of your ticket is to fly from Washington, D.C. to Phnom Penh in the evening. If you’re flexible enough to do this you can expect to save up to 28% on your trip compared to booking a flight at noon.

How much does it cost to fly round-trip from Washington, D.C. to Phnom Penh?

Reviews of airlines servicing Phnom Penh

Get insights into the airlines that provide service to Phnom Penh. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Phnom Penh. Reviews last updated August 20, 2025.
Peruse reviews from past customers who have flown with Korean Air from Washington, D.C. to Phnom Penh to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,131 reviews

Food

8.1

Boarding

8.5

Crew

8.7

Entertainment

8.2

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.
Korean Air
8.4
Very good
1,131 reviews
Korean Air
8.4
Very good
1,131 reviews

Food

8.1

Boarding

8.5

Crew

8.7

Entertainment

8.2

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to Phnom Penh. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Phnom Penh from Washington, D.C.?

    If you book a flight to Phnom Penh from Washington, D.C., you will be flying to Pochentong, which is the city’s only airport. Phnom Penh Pochentong (PNH) is located 5.0 mi from the center of Phnom Penh. There are 0 flights from Washington, D.C. to Pochentong per day from 6 different airlines.

  • How long is the flight from Washington, D.C. to Phnom Penh?

    Airlines like Air China, Asiana Airlines, and Turkish Airlines fly from Washington, D.C. to Phnom Penh in about 37h 10m. The time it takes to get you to your destination can typically vary by up to 11h 46m. Washington, D.C. and Phnom Penh are separated by a distance of 8939 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Washington, D.C. to Phnom Penh round-trip?

    Cheapflights users have booked flights from Washington, D.C. to Phnom Penh round-trip from $1,048. Other airlines that can offer you cheap pricing are Qatar Airways, from $1,299, and Korean Air, from $1,302. You may be able to fly from Washington, D.C. to Phnom Penh for 34% less than the average price by searching for these airlines.

  • What are the most popular routes from Washington, D.C. to Phnom Penh?

    When deciding which route to take from Washington, D.C. to Phnom Penh consider Washington, D.C. Dulles Intl - Phnom Penh Pochentong, Washington, D.C. Reagan-National - Phnom Penh Pochentong or Baltimore/Washington - Phnom Penh Pochentong as they are the most popular.

  • Can I find deals for flights from Washington, D.C. to Phnom Penh that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Phnom Penh flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Phnom Penh?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Phnom Penh.

  • Can I find deals for business class flights from Washington, D.C. to Phnom Penh?

    Yes. Cheapflights offers flight deals from Washington, D.C. to Phnom Penh by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. to Phnom Penh?

    Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to Phnom Penh (average of $985). Flying from Washington, D.C. to Phnom Penh in June is currently the most expensive (average of $1,544). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Washington, D.C. to Phnom Penh

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Phnom Penh flights
Reagan-National to Phnom Penh flights

Top 6 airlines flying from Washington, D.C. to Phnom Penh

Discover the top 6 airlines that operate flights from Washington, D.C. to Phnom Penh. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Etihad AirwaysCheapest$1,048Average$1,274FlexibilityNo cancel feeOn-time75%
Qatar AirwaysCheapest$1,299Average$1,549FlexibilityNo cancel feeOn-time68%
Korean AirCheapest$1,302Average$1,775FlexibilityNo cancel feeOn-time81%
Singapore AirlinesCheapest$1,311Average$1,405FlexibilityNo cancel feeOn-time81%
Malaysia AirlinesCheapest$1,334Average$1,382FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$1,415Average$1,415FlexibilityNo cancel feeOn-time76%

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