Cheap Flights from Washington (IAD) to Phnom Penh (PNH)

Popular airlines from Washington Dulles Intl. Airport (IAD) to Phnom Penh Intl. Airport (PNH)

Find the cheapest month to fly from Washington (IAD) to Phnom Penh (PNH)

September is typically the cheapest month to fly

From $1,038 - $1,517 per traveler.

Alternative airports near Phnom Penh

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Techo Intl. Airport KTI. Cheapest option available. Flights from $2,190
KTI
Techo Intl. Airport
Cheapest
Flights from $2,190

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Phnom Penh Intl. Airport (PNH) cost?
Grab a cheap one-way flight or cheap return flight from Washington Dulles Intl. Airport (IAD) to Phnom Penh Intl. Airport (PNH) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Phnom Penh Intl. Airport (PNH)?
Traveling in may help you find better deals, as it's the cheapest month for flights between IAD and PNH. You'll typically find the lowest fares during the off-season.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Phnom Penh Intl. Airport (PNH)?
Use the filter tool on Expedia to compare different airlines and find the most affordable carrier that'll fly you from IAD to PNH. Then, sort your results by "Price (lowest to highest)" to pick up the best deal available.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Phnom Penh Intl. Airport (PNH)?
There aren't any daily direct flights available from Washington Dulles Intl. Airport (IAD) to Phnom Penh Intl. Airport (PNH). But you can opt for flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be cruising above the clouds in no time at all.
What day of the week has the most flights from IAD to PNH?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can change depending on various factors, including the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Phnom Penh Intl. Airport (PNH)?
To avoid potential delays on the Washington Dulles Intl. Airport (IAD) to Phnom Penh Intl. Airport (PNH) route, travel before 3 PM. Flights after this time have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Phnom Penh Intl. Airport (PNH) last-minute?
Last-minute fares from IAD to PNH are generally more expensive. To secure the lowest prices, start searching for flights as early as possible. That said, if you're flexible with your travel plans, it's possible to score a cheap ticket just before your departure.
Is it cheaper to book an IAD to PNH flight and hotel package?
You'll typically save money by booking an IAD to PNH flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. After selecting your ideal flights and accommodations, you can add extras like activities, car rentals and tours.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Phnom Penh Intl. Airport (PNH)?
If you booked your IAD to PNH flight within the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the type of fare you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you want more information.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Phnom Penh Intl.
Distance
8943 mi

Book with confidence

Washington to Phnom Penh Flights

The cheapest times to fly from Washington to Phnom Penh

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Phnom Penh are during the month of . You can find some of the cheapest flights from Washington to Phnom Penh with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Phnom Penh

Sunday is one of the best days to book for cheap flights from Washington to Phnom Penh: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Phnom Penh

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Phnom Penh in 2026. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Phnom Penh flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Phnom Penh airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Washington to Phnom Penh Flights

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*Available to One Key members.