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

According to our current data, Air China ($855), and Korean Air ($1,477) offers the cheapest pricing from Phnom Penh to Washington, D.C..

What is the cheapest day to fly from Phnom Penh to Washington, D.C.?

Travelers seeking maximum savings on their Phnom Penh to Washington, D.C. flight should consider departing on Tuesday evenings when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Washington, D.C. ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C., use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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

Phnom Penh Pochentong (PNH) is the airport you will fly out of if you book a flight from Phnom Penh to Washington, D.C.. You should not have trouble finding flights to Washington, D.C. from Pochentong; the airport handles an average of 0 outbound flights to Washington, D.C. per day. You should also have plenty of airline options to choose from since 2 airlines have flights from the Phnom Penh airport to Washington, D.C.. It is only a 5.0 mi journey to Pochentong (PNH) from Phnom Penh’s city center.

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

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

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

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

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

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

$638+ Cheap Flights from Phnom Penh to Washington, D.C.

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One-way flights from Phnom Penh to Washington, D.C.
Search for one-way flight options from Phnom Penh to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated September 22, 2025.

Mon 10/131:55 pmPNH - IAD

3 stops37h 15mMultiple Airlines

Deal found 9/19

$638

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Phnom PenhWashington, D.C.

PNH - IAD

PNHIAD

Phnom Penh Pochentong

Mon 10/13

1:55 pm-4:10 pm

3 stops37h 15m

$638

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Deals found on 9/19

Best time to book a flight from Phnom Penh to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Phnom Penh with our price prediction graph.

Estimated round-trip price

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

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

Currently, August is the cheapest month in which you can book a flight from Phnom Penh to Washington, D.C. (average of $241). Flying from Phnom Penh to Washington, D.C. in March is currently the most expensive (average of $290). 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 PNH to WAS?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Phnom Penh to Washington, D.C. as you normally would.

Related info for your journey

What airport do you fly from for flights from Phnom Penh to Washington, D.C.?
Phnom Penh Pochentong (PNH) is the airport you will fly out of if you book a flight from Phnom Penh to Washington, D.C.. You should not have trouble finding flights to Washington, D.C. from Pochentong; the airport handles an average of 0 outbound flights to Washington, D.C. per day. You should also have plenty of airline options to choose from since 2 airlines have flights from the Phnom Penh airport to Washington, D.C.. It is only a 5.0 mi journey to Pochentong (PNH) from Phnom Penh’s city center.
What are the cheapest airlines flying from Phnom Penh to Washington, D.C. round-trip?
According to our current data, Air China ($855), and Korean Air ($1,477) offers the cheapest pricing from Phnom Penh to Washington, D.C..
Can I find deals for flights from Phnom Penh to Washington, D.C. that include hotel bookings?
Yes. In addition to deals on Phnom Penh to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Phnom Penh to Washington, D.C.?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Phnom Penh to Washington, D.C..
Can I find deals for business class flights from Phnom Penh to Washington, D.C.?
Yes. Cheapflights offers flight deals from Phnom Penh to Washington, D.C. 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 Phnom Penh to Washington, D.C.?
Currently, August is the cheapest month in which you can book a flight from Phnom Penh to Washington, D.C. (average of $241). Flying from Phnom Penh to Washington, D.C. in March is currently the most expensive (average of $290). 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.

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Top 2 airlines flying from Phnom Penh to Washington, D.C.

Airline	Cheapest	Average	Flexibility	On-time
Air China	Cheapest$855	Average$937	FlexibilityNo cancel fee	On-time67%
Korean Air	Cheapest$1,477	Average$1,821	FlexibilityNo cancel fee	On-time81%

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$638+ Cheap flights from Phnom Penh (PNH) to Washington, D.C. (WAS)

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 10/13. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Phnom Penh to Washington, D.C. with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Phnom Penh to Washington, D.C.

One-way flights from Phnom Penh to Washington, D.C.Search for one-way flight options from Phnom Penh to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated September 22, 2025.

Search for one-way flight options from Phnom Penh to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated September 22, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Phnom Penh to Washington, D.C. that are best for you.

Best time to book a flight from Phnom Penh to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Phnom Penh with our price prediction graph.

Cheapflights Insights

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

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

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

Find hourly flight availability from Phnom Penh to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 22, 2025.

Related info for your journey

Find useful and relevant information for your journey from Phnom Penh to Washington, D.C.. 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 from for flights from Phnom Penh to Washington, D.C.?

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

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

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

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

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

Traveling to a place near Washington, D.C.?

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

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Top 2 airlines flying from Phnom Penh to Washington, D.C.

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One-way flights from Phnom Penh to Washington, D.C.
Search for one-way flight options from Phnom Penh to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated September 22, 2025.