HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Phnom Penh

Cheap flights from Dulles Intl (IAD) to Phnom Penh (PNH)

IAD — PNH
Nov 22 — Nov 291
Sat 11/22
Sat 11/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to Phnom Penh with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Phnom Penh Pochentong are usually found in September or October, booked 40 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 October 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

June

Cheapest in

September

Average price

$1,365
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Phnom Penh Pochentong flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Phnom Penh Pochentong flights.
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($261 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($45 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Compare providers for flights from Dulles Intl to Phnom Penh

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Phnom Penh in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightnetworkPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Phnom Penh flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Phnom Penh flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Phnom Penh flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Phnom Penh flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-Phnom Penh flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 October 17, 2025.

The best time to book flights from Washington, D.C. Dulles Intl Airport to Phnom Penh is 40 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 $1,220). Flying from Washington, D.C. Dulles Intl Airport to Phnom Penh in June is currently the most expensive (average of $1,574). 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 October 23, 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 28% on your trip compared to booking a flight at noon.

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 October 23, 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
1,153 reviews

Entertainment

8.2

Crew

8.7

Food

8.1

Boarding

8.5

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
1,153 reviews
Korean Air
8.4
Very good
1,153 reviews

Entertainment

8.2

Crew

8.7

Food

8.1

Boarding

8.5

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.
Singapore Airlines
8.1
Very good
1,384 reviews
Korean Air
8.4
Very good
1,153 reviews

Entertainment

8.2

Crew

8.7

Food

8.1

Boarding

8.5

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.
Qatar Airways
7.4
Good
3,654 reviews
Korean Air
8.4
Very good
1,153 reviews

Entertainment

8.2

Crew

8.7

Food

8.1

Boarding

8.5

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.
Etihad Airways
7.4
Good
1,282 reviews
Korean Air
8.4
Very good
1,153 reviews

Entertainment

8.2

Crew

8.7

Food

8.1

Boarding

8.5

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.
Malaysia Airlines
7.3
Good
278 reviews
Korean Air
8.4
Very good
1,153 reviews

Entertainment

8.2

Crew

8.7

Food

8.1

Boarding

8.5

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 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 $1,074, 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 34% 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 $1,220). Flying from Washington, D.C. Dulles Intl Airport to Phnom Penh in June is currently the most expensive (average of $1,574). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Dulles Intl to Phnom Penh

See prices for flight routes from nearby airports that may be better suited for you.
Baltimore to Phnom Penh flights
Reagan-National 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 October 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
Etihad AirwaysCheapest$1,074Average$1,349FlexibilityNo cancel feeOn-time75%
Qatar AirwaysCheapest$1,293Average$1,584FlexibilityNo cancel feeOn-time68%
Korean AirCheapest$1,301Average$1,581FlexibilityNo cancel feeOn-time81%
Singapore AirlinesCheapest$1,311Average$1,405FlexibilityNo cancel feeOn-time81%
Malaysia AirlinesCheapest$1,334Average$1,382FlexibilityNo cancel feeOn-time67%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.