WAS - PNH

$535 Find Cheap Flights from Washington, D.C. 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 Washington, D.C. to Phnom Penh departing on 8/26. 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.
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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 Washington, D.C. to Phnom Penh

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. 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.

Recent round-trip flight deals from Washington, D.C. to Phnom Penh

KAYAK's recommended round-trip deals from the most popular airlines that fly from Washington, D.C. to Phnom Penh.
Discover the best prices for you by selecting your travel dates on KAYAK.
 Logo
10:05 pm - 4:35 pmIAD-PNH
31h 30m2 stops
 Logo
8:50 pm - 4:10 pmPNH-IAD
54h 20m2 stops
$1,159
Find Deal
Wed, Sep 3 - Wed, Oct 1
China Airlines Logo
8:59 am - 9:50 amDCA-PNH
37h 51m2 stops
China Airlines Logo
10:50 am - 8:59 pmPNH-DCA
45h 09m2 stops
$1,222China Airlines
Find Deal
Wed, Sep 3 - Wed, Oct 1
Cathay Pacific Logo
7:17 pm - 5:20 pmDCA-PNH
35h 03m2 stops
Cathay Pacific Logo
11:25 am - 12:56 amPNH-DCA
24h 31m2 stops
$1,237Cathay Pacific
Find Deal
Sat, Oct 18 - Thu, Oct 23
Cathay Pacific Logo
7:30 pm - 10:15 amDCA-PNH
27h 45m2 stops
Cathay Pacific Logo
11:25 am - 12:56 amPNH-DCA
24h 31m2 stops
$1,248Cathay Pacific
Find Deal
Mon, Sep 22 - Mon, Oct 20
Singapore Airlines Logo
8:59 am - 1:10 pmDCA-PNH
41h 11m2 stops
Singapore Airlines Logo
2:05 pm - 8:59 pmPNH-DCA
41h 54m2 stops
$1,270Singapore Airlines
Find Deal
Sat, Sep 20 - Fri, Sep 26
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
$1,334Etihad Airways
Find Deal
Sat, Oct 25 - Tue, Nov 4
Singapore Airlines Logo
6:05 am - 5:40 pmBWI-PNH
48h 35m2 stops
Singapore Airlines Logo
2:05 pm - 5:07 pmPNH-BWI
38h 02m2 stops
$1,342Singapore Airlines
Find Deal
Sun, Jul 20 - Wed, Aug 20
Etihad Airways Logo
10:05 pm - 2:25 pmIAD-PNH
29h 20m2 stops
Etihad Airways Logo
8:30 am - 4:10 pmPNH-IAD
42h 40m1 stop
$1,500Etihad Airways
Find Deal
Mon, Sep 22 - Mon, Oct 20
Korean Air Logo
1:30 pm - 10:10 pmIAD-PNH
21h 40m1 stop
Korean Air Logo
11:30 pm - 10:55 amPNH-IAD
22h 25m1 stop
$1,565Korean Air
Find Deal
Mon, Aug 11 - Sun, Aug 31
Korean Air Logo
7:00 am - 10:10 pmIAD-PNH
28h 10m2 stops
Korean Air Logo
11:30 pm - 10:55 amPNH-IAD
22h 25m1 stop
$1,588Korean Air
Find Deal
Mon, Aug 11 - Sun, Aug 31
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KAYAK's insights & trends for Washington, D.C. to Phnom Penh flights

Get data-powered insights and trends into flights from Washington, D.C. 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, D.C. to Phnom Penh?

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

When flying from Washington, D.C. to Phnom Penh, you should consider leaving on a Friday and avoid Wednesdays if you are looking for the best rates. For your return to Washington, D.C., you’ll find the best rates on Tuesdays and the most expensive ones on Sundays.

What is the cheapest month to fly from Washington, D.C. 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. 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. to Phnom Penh is September, where tickets cost $1,270 (return) on average. On the other hand, the most expensive months are May and July, where the average cost of round-trip tickets is $2,005 and $1,958 respectively.

How far in advance should I book a flight from Washington, D.C. 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. 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. to Phnom Penh, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Good to know

Low seasonApril
High seasonDecember
Cheapest flight$535
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly with an average 16% increase in price.
Flight from Washington Dulles Airport to Phnom Penh

When to book flights from Washington, D.C. to Phnom Penh

Are your dates flexible? Find out the best times to travel from Washington, D.C. 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 flights from Washington, D.C. to Phnom Penh

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. to Phnom Penh was $535 for a one-way ticket and $1,159 for a round-trip.

  • Do I need a passport to fly between Washington, D.C. and Phnom Penh?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Washington, D.C. and on arrival in Phnom Penh.

  • Which airports will I be using when flying from Washington, D.C. to Phnom Penh?

    Washington, D.C. is served by 2 major airports and there is only 1 main airport in Phnom Penh. You will leave Washington, D.C. from one of these airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. You will be arriving at Phnom Penh Pochentong.

  • Which aircraft models fly most regularly from Washington, D.C. to Phnom Penh?

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

  • Which airline alliances offer flights from Washington, D.C. to Phnom Penh?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Washington, D.C. 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, D.C.?

    Seoul is the most popular layover city among KAYAK users traveling from Washington, D.C. to Phnom Penh.

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

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Phnom Penh are Korean Air and Etihad Airways. With an average price for the route of $1,826 and an overall rating of 8.4, Korean Air is the most popular choice. Etihad Airways is also a great choice for the route, with an average price of $1,118 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Washington, D.C. 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, D.C. to Phnom Penh.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. 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, D.C. 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, D.C. 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, D.C. with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. 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, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top airlines flying from Washington, D.C. 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 Washington, D.C. 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 1066 reviews
8.1Food
8.3Comfort
8.7Crew
8.2Entertainment
8.5Boarding
Airline reviews

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

10.0 ExcellentAnonymous, Apr 2025ATL - ICN
Read more Korean Air reviews

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

It's good overall. Flight was packed. Inflight entertainment choices were lacking.

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.

Just a typical domestic poor flight nothing more. There is no food choices in such a flight. Crew doesn't really care if you are on-board or not

long flights are difficult but the crew and amenities made it a very good experience

Our seat row plus one ahead and behind we're completely overlooked during beverage service...

Need to have space for Cary on when traveler boarding any zone

When I selected my seats, it showed row 29 as the front row, so I paid extra to sit in what I thought would be the front row, but when I boarded the plane, row 29 was the second economy row. I was disappointed that I'd spent almost $100 more for no actual benefit.

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

Horrible. After paying for seats, I was cramped, my daughters legs kept hitting the seat in front, I had no overhead bin space and no help from stewards on board, the food was served cold, when asked for snacks was told to wait and never received any, the flight was cold with no temperature controls. Entertainment was outdated. I booked this through partnership with 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.

The flight take time was changed 23 times. The system kept sending messages it will be earlier at 4am and eventually the flight was at 9am I didn’t sleep all night because of that

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

Boarding catastrophic let alone have to claimb the plain rather than using jetway. 5.5 hr delay leaving had to do stop in Lgw for a new crew which further compounded the delay. Connecting flight would not wait and had to pend a night in a hotel. Curiously my seat would not go full flat.

Good. The food was very bad. Except for the chicken rice, rest of the dish went to trash.

In never flown this flight, because my flight coning from Barcelona was delayed.

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

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