IAD - PNH

Find cheap flights from Washington Dulles Airport to Phnom Penh

1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Phnom Penh

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Phnom Penh, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Phnom Penh, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
Multiple Airlines
Thu 12/11
IAD - PNH • multi-stop
Cheapest one-way
Multiple Airlines
Thu 12/11
IAD - PNH • multi-stop
When to travel
September
Cheapest • 17% price drop
January
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Dulles Intl to Phnom Penh (IAD-PNH)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Phnom Penh that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Dulles Intl to Phnom Penh

Multiple Airlines Logo
IAD
-
PNH
8939 mimulti-stop
Multiple Airlines Logo
PNH
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IAD
8939 mimulti-stop
Multiple Airlines
Booking Insights

KAYAK's insights & trends for Dulles Intl to Phnom Penh flights

Get data-powered insights and trends into flights from Dulles Intl to Phnom Penh to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Washington Dulles Airport to Phnom Penh?

The average price of all round-trip flights from Washington, D.C. Dulles Intl Airport to Phnom Penh clicked on KAYAK for each day over the last 12 months.

For Washington Dulles Airport to Phnom Penh, Friday is the cheapest day to fly on average and Wednesday is the most expensive. Flying from Phnom Penh back to Washington Dulles Airport, the best deals are generally found on Tuesday, with Sunday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Phnom Penh, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. Dulles Intl Airport to Phnom Penh is September, where tickets cost $1,350 (return) on average. On the other hand, the most expensive months are June and April, where the average cost of round-trip tickets is $2,126 and $1,974 respectively.

Good to know

Low seasonMay
Best time to beat the crowds but there is an average 12% increase in price.
Most popular time to fly and prices are also 15% lower on average.

When to book flights from Dulles Intl to Phnom Penh

Are your dates flexible? Find out the best times to travel from Dulles Intl to Phnom Penh based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Washington Dulles Airport to Phnom Penh flights

  • Which flight options do I have on this route?

    When flying from Washington to Phnom Penh, several airlines offer flights on this route with one or more layovers. Qatar Airways, Emirates, Cathay Pacific, Turkish Airlines, China Eastern Airlines, Korean Air, and Singapore Airlines provide connecting flights through their hub cities.

  • What airline from Washington Dulles Airport to Phnom Penh is ideal for someone with special needs?

    Cathay Pacific, Korean Air, Qatar Airways, and United Airlines are ideal airlines for passengers traveling with special needs. These airlines offer dedicated services such as mobility aids, escort through the airport, wheelchair assistance, and trained cabin crew to assist special-needs passengers. Passengers that require special assistance during their flight should inform the respective airline in advance.

  • What is the quickest way to get downtown from Phnom Penn International Airport?

    The quickest way to get downtown from Phnom Penn International Airport is through a taxi or ride-hailing service. Passengers getting off at this airport can get to taxi stands after exiting the arrivals area at the airport. Alternatively, you can book a ride downtown through Grab or PassApp the most popular app-based services at Phnom Penh International Airport available for travelers.

  • Which airline suits families traveling from Washington Dulles Airport to Phnom Penh?

    If you are flying from Washington Dulles Airport to Phnom Penh with your family, consider booking your flight with Singapore Airlines. This airline offers dedicated services and amenities, such as priority boarding for families with young children, activity packs, special meals, and entertainment for kids. Flying with this airline guarantees you and your kids an enjoyable and comfortable trip from Washington to Phnom Penh.

  • Do I need a passport to fly between Washington Dulles Airport and Phnom Penh?

    Yes, you’ll need a passport to travel to Phnom Penh from Washington Dulles Airport.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Phnom Penh?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Washington Dulles Airport to Phnom Penh?

    oneworld, and SkyTeam are the airline alliances operating flights between Washington Dulles Airport and Phnom Penh, with oneworld being the most commonly used for this route.

  • What is the most popular layover when flying to Phnom Penh from Washington Dulles Airport?

    Seoul is the most popular layover city among KAYAK users traveling from Washington Dulles Airport to Phnom Penh.

  • Which is the best airline for flights from Washington, D.C. to Phnom Penh, Korean Air or Qatar Airways?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Phnom Penh are Korean Air and Qatar Airways. With an average price for the route of $1,516 and an overall rating of 8.4, Korean Air is the most popular choice. Qatar Airways is also a great choice for the route, with an average price of $1,640 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to Phnom Penh?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington Dulles Airport to Phnom Penh.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington Dulles Airport to Phnom Penh?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Phnom Penh from Washington Dulles Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington Dulles Airport to Phnom Penh?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Phnom Penh with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and PNH can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport to Phnom Penh?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Phnom Penh from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Washington, D.C. Dulles Intl Airport to Phnom Penh

  • When flying from Washington to Phnom Penh, passengers fly from Washington Dulles Airport (IAD). This airport is the main international airport located about 26 miles from downtown Washington DC thus making it more convenient for you if you travel from Washington Dulles Airport (IAD) to Phnom Penh (PNH). Passengers going to Washington Dulles Airport can use Metro bus services for routes 5A, 5B, and 5C that depart from various tops along L'Enfant Plaza and Rosslyn.
  • Passengers flying from Washington, D.C., to Phnom Penh, Cambodia land at Phnom Penh International Airport. This airport is the main international airport serving Phnom Penh and is approximately 7 miles from the city center.
  • Those arriving at Phnom Penh International Airport late at night can consider staying at a hotel nearby. These include Phnom Penh Hotel, Rambutan Resort, and The Pavilion Hotel. The hotels offer complimentary shuttle services to and from the airport.
  • If you have an early morning flight from Washington to Phnom Penh, consider staying at a nearby hotel. Holiday Inn Washington-Dulles International Airport is a suitable hotel that offers complimentary shuttle services to and from the airport. Other hotels include Hyatt Regency Dulles and Hilton Washington Dulles Airport.
  • Cathay Pacific is the ideal environment-friendly airline on this flight route. The airline uses fuel-efficient aircraft and has invested in biofuel research. The airline also has environmentally friendly initiatives such as recycling, minimizing waste, and supporting carbon offset programs.

Reviews of the top 4 airlines serving from Dulles Intl to Phnom Penh

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Phnom Penh. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Dulles Intl to Phnom Penh? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.4
Korean AirOverall score based on 1184 reviews
8.2Entertainment
8.1Food
8.3Comfort
8.7Crew
8.5Boarding
Airline reviews

The boarding process was efficient and quick. The seats were comfortable. The food was good. The service was excellent. We had a lovely flight from Seattle on Korean air

10.0 ExcellentVivian, Nov 2025
SEA - ICN
Read more Korean Air reviews

The boarding process was efficient and quick. The seats were comfortable. The food was good. The service was excellent. We had a lovely flight from Seattle on Korean air

Flight crew was fantastic. The aircraft was meticulously cleaned at all times. The crew was continuously checking to see if the passengers were ok.

It’s great, long flight and arrive safe at destination

They were trying to get people to check luggage because the over head compartments were full but when we boarded there were lots of empty places that people could have put the luggage.

It was good, I liked the self-serve snacks but it was a little difficult to get the alcohol, which is understandable since I wouldn't want kids sneaking it.

Friendly flight attendants and gate agents. Very clean plane and food was good!

I was unable to select decent seats, and so I was stuck in the middle seat because it was selected for me

There was a lot of partial tv shows but not enough to last the flight. The food was incredible! The crew were so helpful and patient. Lots more space than what I usually get on an international flight. Very comfortable!

Stingy on the drinks - 15 hour direct flight and could barely get attention for some water

Not many people, so you can lay down on two seats

All good. Over four hours flight if provided snacks like Qatar Airways would be better

Lobster starter in business class was not good, tough, served cold, and without butter. Movie selection was missing latest releases, did not offer older classic, high quality movies

Food was absolutely pathetic. I wasted so much food which I thought was inedible. I also loathe the inflight entertainment system which has very little content

My entire row did not have power for the full duration of a 14.5 hour flight. Could not charge any devices such as laptop or phones for the entirety of the long flight. The flight attendants tried to remedy the issue by resetting the power, but were not successful. The only other solution provided was to move me to another seat on the plane which was in the middle row. I had paid for a “preferred” seat that was a window seat. This was a downgrade being offered due to the power issue.

Nothing to complain. The staff and flight was good especially the seats which was better compared than the cloth ones on Qatar airways

I was travelling 3.5 years after. Agree Economy is no business class but the food was mediocre. Ordered a Hindu meal, the salads were bitter . The food was really below quality and had no tast from what I had in the past. Indian Railways probably have a better quality food when compared. However the kids meal was really nice and really appreciate how they were taken care of. The restrooms were dirty .

My flight was with American Airlines 120. The flight was delayed 3 hours and I missed my connection. When I arrived in Doha, the AA staff told me to call an 800 number to rebook a different flight, which was unacceptable. Eventually a Qatar Air staff member helped rebook me on a flight to Manila, that was 12 hours later. They offered me a hotel and meal voucher which I declined, because I didn’t want to leave the airport. Long story short, I spent 12 hours in the Doha airport waiting for my next flight.

Overall the experience was neat with crew being nice and caring especially to parent with kids. The free snacks option was okay. The kiosk at Philly airport didn’t work.

Reason for travelling Tampa to Orlando is to fly Qatar Airline. we end up with American Airline. This was the miserable experience I ever had in my entire travel history. Flight attendants were rude. They hit my knee with the food cart and I was holding ice pack for 2 hours. I still have the pain after a week. WE boarded the flight twice because of the temperature inside the plan.

First keep the airline as you promise. Reason for travelling from Orlando to Tampa is to go with Qatar Airline. We end up with American Airline. As expected the service was horrible.

I missed my flight ,staff unhelpful, they sat and watched me wait ,gangway door closed, English was a problem no announcement I was on time now I missed my month vacation ,lost 1400 bucks no refund I'm sick to my stomach

It’s a business class ticket but they didn’t give a lounge access

Seat space was tight and uncomfortable. There was hardly any cushioning giving me a terrible tail bone ache. Getting and out was extremely cramped. We paid for seat choices and felt totally ripped off. Food was mediocre. By the time the servers served 2 or 3 rows they ran out of this or that option as we saw on the inbound trip also. This is infuriating. Entertainment choices were extremely limited for such a long haul. The screen froze on occasion and did not switch off when the on off button was pressed. When it did it came back on its own in 5 seconds. The airlines has gone downhill since last year.

Crew was amazing as usual. Very comfortable for a 13hour flight. Check in at ATL was terrible. Ticket counter charged me $200 for a small bag. Apparently Kayak sold me a zero luggage ticket. No carry on no checked. So the check in desk charged me a bullshit $200 dollar fee for a small gym bag weighing less than 20lbs. In true 3rd party ticket buying. This will turn into a finger pointing process between Kayak and Etihad. Now I'm going to have to ship my bag back in the mail a day ahead of my return flight.

The flight from Abu Dabhi to Bangalore was terrible. The plane was an order model with no onboard entertainment. The beverage selection were very limited.

excellent, staff and boarding were all seamless and no issues, thank you!

More leg space than other flights, but *maybe* narrower seats

We booked a business class ticket via Underpricer. Somehow they screwed up our ticket from Abu Dhabi to Ahmedabad. We will be hesitant to book again with them.

Stewardess was attentive and was actively roamin to check the passengers on the biz class

It was worst flight ever of 26h. Poor service and seating. Flight from Abu Dhabi to Islamabad service and seating was worst ever. No tv extra.

Surprised that the safety briefing was only conducted in Malay language and no English despite there are foreigners on board. MH should take safety more seriously.

Flights were delayed, Food was good but only 1 meal instead of 2.

Food was good but only 1 meal and 1 pie, instead of 2 meals. Both legs were late.

We are row 11, when the crew came to us, only one meal choice was available.

OK seats comfortable, easy boarding/embarking, excellent connection to domestic Malaysia flight with baggage checked through without customs. Catering especially drinks borderline ok luckily less important aspect

Comfortable seats in economy, managed a few hours sleep in an o night flight but the food was terrible. Surprising as Malaysia airlines has been good in the past. Service was mediocre this time too.

Vast improvement needed in customer service. I couldn’t get the drink of my choice during both meals (i.e. sparking water and Diet Coke). I had used plastic cups falling onto me from the tray. No eye contact when they thank you on the way out signalling an insincere thank you.

Jia yung was the flight attendant that made this a miserable flight.

The flight isn’t great, as the plane has faulty with light and noise. It blinks and make noise for 8hrs non stop! Causing health and sensory issues! Causing Hazard matter to all 3 babies that on bassinet seats. This matters affected 12 passengers and the most horrible flight I ever experience. Have been flying with MAS for more 30yrs and this is the worst! Very disappointed

AC not working, just slowly blowing room temperature air. Long taxi time does not help as well. Sweating all over the whole trip.

Everything you need to know for your flight from Dulles Intl to Phnom Penh

Information on your arrival and departure airports