IAD - PNH

$537 Find Cheap Flights from Washington Dulles Airport to Phnom Penh

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Phnom Penh departing on 8/12. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

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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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

Fri, Oct 24 - Thu, Nov 6
Air China Logo
11:00 pm - 11:10 pmIAD-PNH
37h 10m1 stop
Air China Logo
12:25 am - 6:30 pmPNH-IAD
30h 05m1 stop
$968Air China
Find Deal
Tue, Nov 4 - Thu, Nov 20
Air China Logo
10:00 pm - 11:10 pmIAD-PNH
37h 10m1 stop
Air China Logo
12:25 am - 6:30 pmPNH-IAD
30h 05m1 stop
$990Air China
Find Deal
Wed, Aug 20 - Tue, Oct 21
Korean Air Logo
1:30 pm - 10:10 pmIAD-PNH
21h 40m1 stop
Korean Air Logo
11:30 pm - 7:18 pmPNH-IAD
54h 48m2 stops
$1,050Korean Air
Find Deal
Wed, Aug 20 - Tue, Oct 21
Korean Air Logo
8:23 pm - 10:10 pmIAD-PNH
38h 47m2 stops
Korean Air Logo
11:30 pm - 7:18 pmPNH-IAD
54h 48m2 stops
$1,055Korean Air
Find Deal
Tue, Oct 28 - Fri, Dec 12
Asiana Airlines Logo
6:13 pm - 10:55 pmIAD-PNH
41h 42m2 stops
Asiana Airlines Logo
11:55 pm - 5:55 amPNH-IAD
42h 00m2 stops
$1,115Asiana Airlines
Find Deal
Sat, Oct 25 - Tue, Nov 4
Etihad Airways Logo
10:05 pm - 6:30 amIAD-PNH
21h 25m1 stop
Etihad Airways Logo
7:55 am - 4:05 pmPNH-IAD
44h 10m1 stop
$1,116Etihad Airways
Find Deal
Mon, Aug 25 - Mon, Nov 24
Asiana Airlines Logo
9:00 am - 10:55 pmIAD-PNH
26h 55m2 stops
Asiana Airlines Logo
11:55 pm - 6:28 amPNH-IAD
42h 33m2 stops
$1,134Asiana Airlines
Find Deal
Sat, Nov 1 - Mon, Nov 10
Etihad Airways Logo
10:10 pm - 6:30 amIAD-PNH
21h 20m1 stop
Etihad Airways Logo
7:55 am - 4:05 pmPNH-IAD
44h 10m1 stop
$1,166Etihad Airways
Find Deal
Fri, Oct 24 - Fri, Nov 7
Singapore Airlines Logo
7:48 pm - 8:35 amIAD-PNH
49h 47m2 stops
Singapore Airlines Logo
7:40 pm - 6:23 amPNH-IAD
46h 43m2 stops
$1,297Singapore Airlines
Find Deal
Fri, Oct 24 - Fri, Nov 7
Qatar Airways Logo
9:00 pm - 3:25 pmIAD-PNH
31h 25m2 stops
Qatar Airways Logo
5:10 pm - 3:55 pmPNH-IAD
34h 45m2 stops
$1,392Qatar Airways
Find Deal
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.

How much is a round-trip flight from Washington, D.C. Dulles Intl Airport to Phnom Penh?

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 $1,855 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure 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 average of all the values for each week.

To get a below average price on the flight from Washington, D.C. Dulles Intl Airport to Phnom Penh, you should book around 2 weeks before departure, which saves you about 29% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Good to know

Low seasonMay
Cheapest flight$537
Best time to beat the crowds but there is an average 10% increase in price.
Most popular time to fly and prices are also 7% lower on average.
Flight from Washington Dulles Airport to Phnom Penh

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.

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Phnom Penh was $537 for a one-way ticket and $968 for a round-trip.

  • 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 airports will I be using when flying from Washington Dulles Airport to Phnom Penh?

    When flying out of Washington Dulles Airport you will be using Washington, D.C. Dulles Intl. You will be landing at Phnom Penh, also known as Phnom Penh Pochentong.

  • 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?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Washington Dulles Airport and Phnom Penh, with Star Alliance 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 Singapore Airlines?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Phnom Penh are Korean Air and Singapore Airlines. With an average price for the route of $1,616 and an overall rating of 8.4, Korean Air is the most popular choice. Singapore Airlines is also a great choice for the route, with an average price of $1,603 and an overall rating of 8.1.

  • 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 5 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 1121 reviews
8.7Crew
8.1Food
8.5Boarding
8.2Comfort
8.2Entertainment
Airline reviews

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

10.0 ExcellentAnonymous, Jul 2025DFW - ICN
Read more Korean Air reviews

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

One of the flight attendants stepped on my foot. I was on the aisle seat. A lady inside needed to get out. So Instood. Just then, a flight attentendant came wuicklybtheoughbthe aisle and stepprd on my sock covered toes. I let out a small sound. She stopped momentarily, but didn’t ask how I was just took off of the aisle. Never came back to see how I was. Fortunately, I was not really hurt other than a slight soreness in my toes. But I found that to be very negligent.

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

The delay in Korea was a pain and set us back a day. I have to give big props to Korean Air for setting up a hotel with dinner and transportation to and from the hotel. I also needed assistance with a wheelchair and they did an outstanding job.

Great except for the delay in Korea. Korean Air did a great job setting up a hotel for the night. I also needed assistance with a wheelchair and they were outstanding.

The flight was on time and very quick, as expected, but the leg room isn't great in coach seats.

The food on this flight from NRT to ICN was average. The staff were very friendly, but the flight took about 60 minutes longer than it should have because the pilot was only flying at 330mph instead of 500-550. Not sure what the reason is for that, but it meant for a much longer flight.

Crew and service excellent. 2 hour delay for takeoff. SQ app showed flight on time.

Very good flight from Boarding to landing -efficient and comfortable with decent entertainment options

Construction at PDX resulting in very lung walk from the rental car to the gate. SFO, extremely long walk between terminals to get to connecting Singapore airlines flight. My smart watch recorded a total of 3 miles.

Crew and service was excellent, but passengers should be offered a welcome drink before take off which did not happen. Food was very good. Unfortunately the lie-flat bed in business class was one of the most uncomfortable I have experienced. The configuration forces you to sleep with your legs at an angle instead of in a straight line, plus there is very little padding on the bed so it wasn't possible to sleep for more than 2-3 hours on an 18 hour flight. For what the airlines charges for a business class ticket their hard product leaves a lot to be desired.

So happy I flew with Singapore Airlines. The customer service is top notch. I am terrified of flying and the staff made me feel so at ease. Will only fly Singapore internationally moving forward.

Food could have been better. Too many passengers getting up and down all the time.

Everything was great keep up the good work 😁, can't ask for more.

Flight from SFO did not include entertainment as it was not working the entire duration of the flight. Was informed that there would be a $350 voucher for the inconvenience. Uncertain how the voucher will be provided.

The food options and quality could use some more excitement and variety.

Overall, very good. The food was better than expected with the exception of the pork and potatoes dinner at the end of the flight. My family all selected that dish and did not set it. I tried a bite also and it was honestly terrible. Also, it would be helpful to know when the snacks in the back of the plane are available.

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.

Not sure how we end up with American Airlines instead of Qatar Airways. From Philadelphia to Qatar they boarded us then they asked us to unload. After 30 minutes later they board us again. The inside the plane it was burning hot and we were sweating like crazy. Crew members are absolute rude. The way they served the passengers were horrible. One of the crew members hit my knee with food cart and kept going. I was holding an ice pack for almost 2 hours. I am still with the pain.

I felt that when I was rerouted it should have been to business class.

The flight was smooth Thank God but the delays and changing gates for 3-4 times made me so tired of walking back and forth with heavy bags I thought I was going to pass out with heavy headaches but Thank God finally found the final gate and home safe. These delays happen anytime for important reasons so just be patient when you come across these situations.

This trip was the most comfortable one I have ever experienced, the team was excellent and very helpful. I am so glad I picked Qatar Airways.

All the crew members were too slow and rude. Most of the times the registers were empty, while hundreds of customers were waiting in line, and it was impossible to get a supervisor. Despite being in line on time, I missed my freight, plus a some customers who were ahead and behind me.

Well organized boarding, efficient and on time. Nice crew on the plane. Thank you!

The Qatar Airways staff pre-boarding and also on the flight from Dallas to Doha were incredibly mediocre and arrogant. Consider retraining these individuals Other flights were ok.

My experience with Qatar airway was very unsatisfactory. They lost my child’s stroller and I was told they found it and will send it to the hotel which was a lie. I had to go back to the airport baggage claim and pick up myself after trying to contact them many times!. There was a lack professional and communication. I am very disappointed in Qatar airway and will not be recommending them to friends and family nor will I be flying with them in the future.

It was OK as the seat which we paid for doesn’t have any window. We paid $120 for 3 seats but it’s for nothing. Crew could not help. None of the ports worked so all our phones went dry

I had a terrible experience checking in at the airport for my flight. I booked my ticket initially through Kayak while it was promoted as a ticket that offers a carry on and 2 suit cases. (I have a screen shot as a proof of it) I selected it to buy three tickets and paid online. Couple of minutes later airfare assist which is the OTA offering the ticket called me saying My card declined. So I used a different card that went through. I was surprised that they increased the price ticket by a $167. They said the ticket no longer exists and because my card declined I had to buy a new one. So I did. The day my family and I were traveling I could not check in and when I went to the airport I was shocked to be told my ticket had no bags allowed and must pay $200 per bag for three people 6 bags mean I have to pay $1200. I called the travel agency as I feel I was scammed the confirmation didn’t say anything about the bags and they never told me the new ticket doesn’t not include any bag so they changed it after I selected it on your app without informing me. Very sneaky. The travel agency said they will reimburse me only for one bag person. Which means I still paid $600 I still feel very disappointed to pay such an expense. I have always used Kayak to buy my flight tickets and telling everyone how good your rates and app are however after this I feel I was mislead and paid more for something I should not have to. You allowing such an agency on your platform will surely hurt your reputation and level of integrity. I have all the proofs from the screen shot to the confirmation email from them, the or email offering to reimburse o e bag per person and the $1200 bag fees receipts that I paid on the desk. I must be refund the full amount and I look forward to your response.

The food could be better. Toilets were smelly all along

second leg was more comfortable. Customer service in Abu Dhabi is okay.

Horrible. After paying for my seats, I was cramped, had no overhead bin space, freezing as the flight had no temperature controls, the food was awful and served cold, when asked for snacks was told to wait and then never received any. I booked this flight as a partner through American Airlines but will avoid in the future.

Should have had business class line in immigration. Food quality suboptimal

Used to Etihad employees are very rude and unprofessional but now better than before over all is okay now

The staff were wonderful but the seats weren't very comfortable for a bigger guy like me.

Likes: on time departure, new plane Didn’t like:very poor quality food, very limited entertainment.no amenity kit etc.

Bad. Flight was very uncomfortable with narrow and shallow seats, very little food and water. I will not fly etihad again.

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.

Did not take as cancelled 3 time so took another airline

It was a 2-hour flight so they didn't have much time for serving food. There was some turbulence so they could not serve hot coffee or tea for the safety reason. Good service, good tasting food, nice plane, a little bit of delay.

The IFE is quite unconvenient if using our own device. Not all passenger brought their own earphone/headphone.

Ok, but legspace on MH0127 from Kul to Per was too small. It was not possible to tilt my seat which I don't understand because the seat in front of my could do it. So I didn't rest on the flight. Also, the crew was probably understaffed because it took very long time to take trash after the meal. Everything very different from the flight with Malaysian Airlines from London to KL.

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