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Phnom Penh

$569+ Cheap flights from Dulles Intl (IAD) 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 11/23. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — PNH
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Phnom Penh Pochentong are usually found in September or October, booked 73 days in advance, depart on a Friday or Saturday and return on a Tuesday

Cheap flight deals from Dulles Intl to Phnom Penh

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) 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 18, 2025.

Round-trip from

$990
(FlightHub)

One-way from

$569
(United)

Popular in

June

Cheapest in

September

Average price

$1,419
From Washington, D.C. Dulles Intl to Phnom Penh Pochentong
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One-way flight from Washington, D.C. Dulles Intl to Phnom Penh Pochentong
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Highest demand for flights based on searches. 11% potential increase in price ($223 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($42 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 Dulles Intl to Phnom Penh

Cheapest flights from Dulles Intl to Phnom Penh
Explore the most affordable flight options available from Dulles Intl to Phnom Penh. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

This FlightHub deal was found by Cheapflights users on 8/17. 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 FlightHub 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 8/17$990
This Delta deal was found by Cheapflights users on 8/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/12:15 pmIAD - PNH
2 stops44h 55mDelta
Fri 9/511:30 pmPNH - IAD
2 stops34h 51mDelta
Deal found 8/16$1,037
This United deal was found by Cheapflights users on 8/16. 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.
Mon 9/156:55 pmIAD - PNH
2 stops31h 15mMultiple Airlines
Mon 9/222:05 pmPNH - IAD
2 stops29h 03mMultiple Airlines
Deal found 8/16$1,049
This oojo deal was found by Cheapflights users on 8/17. 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.
Sat 10/2510:05 pmIAD - PNH
1 stop21h 25mEtihad Airways
Tue 11/47:55 amPNH - IAD
1 stop44h 10mEtihad Airways
Deal found 8/17$1,290
This oojo deal was found by Cheapflights users on 8/16. 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 8/16$1,307
This United deal was found by Cheapflights users on 8/15. 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.
Tue 11/46:03 pmIAD - PNH
2 stops31h 42mMultiple Airlines
Fri 11/2111:55 pmPNH - IAD
2 stops37h 01mMultiple Airlines
Deal found 8/15$1,321
This oojo deal was found by Cheapflights users on 8/17. 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.
Sat 10/256:25 amIAD - PNH
2 stops42h 00mEVA Air
Tue 11/412:45 pmPNH - IAD
2 stops29h 38mEVA Air
Deal found 8/17$1,355
This Orbitz deal was found by Cheapflights users on 8/17. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/56:13 pmIAD - PNH
2 stops29h 12mMultiple Airlines
Fri 11/1412:45 pmPNH - IAD
2 stops29h 38mMultiple Airlines
Deal found 8/17$1,388
This oojo deal was found by Cheapflights users on 8/16. 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.
Mon 12/86:55 pmIAD - PNH
2 stops49h 40mSingapore Airlines
Mon 1/127:40 pmPNH - IAD
2 stops34h 15mSingapore Airlines
Deal found 8/16$1,399
This Gotogate deal was found by Cheapflights users on 8/16. 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.
Mon 9/11:15 pmIAD - PNH
1 stop22h 40mMultiple Airlines
Thu 9/412:20 amPNH - IAD
1 stop30h 10mMultiple Airlines
Deal found 8/16$1,424

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl 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 18, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Phnom Penh that are best for you.

Fly from

Dulles Intl

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

$990

Washington, D.C.Phnom Penh

IAD - PNH

IADPNH

Washington, D.C. Dulles Intl

Mon 9/1

2:15 pm-10:10 pm

2 stops44h 55m

Phnom Penh Pochentong

Fri 9/5

11:30 pm-11:21 pm

2 stops34h 51m

$1,037

Washington, D.C.Phnom Penh

IAD - PNH

IADPNH

Washington, D.C. Dulles Intl

Mon 9/15

6:55 pm-1:10 pm

2 stops31h 15m

Phnom Penh Pochentong

Mon 9/22

2:05 pm-8:08 am

2 stops29h 03m

$1,049

Washington, D.C.Phnom Penh

IAD - PNH

IADPNH

Washington, D.C. Dulles Intl

Tue 9/16

5:20 pm-1:10 pm

2 stops32h 50m

Phnom Penh Pochentong

Tue 9/23

2:05 pm-7:00 am

2 stops27h 55m

$1,049

Washington, D.C.Phnom Penh

IAD - PNH

IADPNH

Washington, D.C. Dulles Intl

Tue 11/4

9:10 pm-6:25 pm

1 stop33h 15m

Phnom Penh Pochentong

Fri 11/21

7:55 am-4:05 pm

1 stop44h 10m

$1,290

Washington, D.C.Phnom Penh

IAD - PNH

IADPNH

Washington, D.C. Dulles Intl

Sat 10/25

10:05 pm-6:30 am

1 stop21h 25m

Phnom Penh Pochentong

Tue 11/4

7:50 pm-4:05 pm

1 stop32h 15m

$1,290

Washington, D.C.Phnom Penh

IAD - PNH

IADPNH

Washington, D.C. Dulles Intl

Fri 10/24

7:48 pm-8:35 am

2 stops49h 47m

Phnom Penh Pochentong

Fri 11/7

7:40 pm-6:23 am

2 stops46h 43m

$1,307

Washington, D.C.Phnom Penh

IAD - PNH

IADPNH

Washington, D.C. Dulles Intl

Tue 11/4

6:03 pm-1:45 pm

2 stops31h 42m

Phnom Penh Pochentong

Fri 11/21

11:55 pm-12:56 am

2 stops37h 01m

$1,321

Washington, D.C.Phnom Penh

IAD - PNH

IADPNH

Washington, D.C. Dulles Intl

Sat 10/25

6:25 am-11:25 am

2 stops42h 00m

Phnom Penh Pochentong

Tue 11/4

12:45 pm-6:23 am

2 stops29h 38m

$1,355

Washington, D.C.Phnom Penh

IAD - PNH

IADPNH

Washington, D.C. Dulles Intl

Sun 11/23

12:35 pm-1:45 pm

2 stops37h 10m

$569

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/17

Showing 1-10 of 15 results
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Best time to book a flight from Dulles Intl to Phnom Penh

Have a flexible travel schedule? Discover the best time to fly to Phnom Penh from Dulles Intl 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. Dulles Intl Airport to Phnom Penh

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Phnom Penh?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Phnom Penh. Price data was last updated on August 8, 2025.

The best time to book flights from Washington, D.C. Dulles Intl Airport to Phnom Penh is 72 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, March is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Phnom Penh (average of $986). Flying from Washington, D.C. Dulles Intl Airport to Phnom Penh in June is currently the most expensive (average of $1,546). 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 IAD to PNH?

Find hourly flight availability from Dulles Intl 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 18, 2025.

A simple way to save on the total cost of your ticket is to fly from Washington, D.C. Dulles Intl Airport to Phnom Penh in the evening. If you’re flexible enough to do this you can expect to save up to 29% on your trip compared to booking a flight at noon.

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport 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 18, 2025.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Phnom Penh, such as Korean Air, Singapore Airlines, and Qatar Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,131 reviews

Crew

8.7

Overall

8.4

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Food

8.1

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

Crew

8.7

Overall

8.4

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Food

8.1

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.
Singapore Airlines
8.1
Very good
1,347 reviews
Korean Air
8.4
Very good
1,131 reviews

Crew

8.7

Overall

8.4

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Food

8.1

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.
Qatar Airways
7.4
Good
3,609 reviews
Korean Air
8.4
Very good
1,131 reviews

Crew

8.7

Overall

8.4

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Food

8.1

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.
Etihad Airways
7.4
Good
1,233 reviews
Korean Air
8.4
Very good
1,131 reviews

Crew

8.7

Overall

8.4

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Food

8.1

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.
Malaysia Airlines
7.4
Good
274 reviews
Korean Air
8.4
Very good
1,131 reviews

Crew

8.7

Overall

8.4

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Food

8.1

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 Dulles Intl 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. Dulles Intl?

    For a flight from Washington, D.C. Dulles Intl to Phnom Penh, you will be flying into Pochentong. Phnom Penh Pochentong (PNH) is just 5.0 mi from the center of the city. Pochentong is the only Phnom Penh airport and it handles 0 inbound flights from Washington, D.C. Dulles Intl per day. 5 airlines have flights to Phnom Penh Pochentong from Washington, D.C. Dulles Intl on a regular basis.

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

    Etihad Airways, at $1,048, was found to be the cheapest airline from Washington, D.C. Dulles Intl Airport to Phnom Penh.Alternate airlines to your destination round-trip include Qatar Airways and Korean Air. Etihad Airways is currently priced 37% below the average price you’ll pay for this route.

  • Can I find deals for flights from Dulles Intl to Phnom Penh that include hotel bookings?

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

  • How can I find direct flights from Dulles Intl to Phnom Penh?

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

  • Can I find deals for business class flights from Dulles Intl to Phnom Penh?

    Yes. Cheapflights offers flight deals from Dulles Intl 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. Dulles Intl Airport to Phnom Penh?

    Currently, March is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Phnom Penh (average of $986). Flying from Washington, D.C. Dulles Intl Airport to Phnom Penh in June is currently the most expensive (average of $1,546). 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 Dulles Intl to Phnom Penh

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

Top 5 airlines flying from Dulles Intl to Phnom Penh

Discover the top 5 airlines that operate flights from Dulles Intl 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 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Etihad AirwaysCheapest$1,048Average$1,240FlexibilityNo cancel feeOn-time75%
Qatar AirwaysCheapest$1,299Average$1,549FlexibilityNo cancel feeOn-time68%
Korean AirCheapest$1,302Average$1,607FlexibilityNo cancel feeOn-time81%
Singapore AirlinesCheapest$1,311Average$1,405FlexibilityNo cancel feeOn-time81%
Malaysia AirlinesCheapest$1,334Average$1,382FlexibilityNo cancel feeOn-time67%

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