HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Phnom Penh

$457+ Cheap flights from Washington to Phnom Penh (PNH)

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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PNH
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington to Phnom Penh with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Washington to Phnom Penh

Keep the following information in mind while searching for Washington to Phnom Penh flight deals. Data was last updated February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$758
(oojo)

One-way from

$457
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$945
Provider with most accurate pricing for Seattle/Tacoma Intl-Phnom Penh Pochentong flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Phnom Penh Pochentong flights.
Search Deals
From Washington to Phnom Penh Pochentong
Search Deals
One-way flight from Washington to Phnom Penh Pochentong
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($268 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($52 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
Search Deals

Find flight deals from Washington to Phnom Penh

Cheapest flights from Washington to Phnom Penh
Explore the most affordable flight options available from Washington to Phnom Penh. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

This oojo deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/611:00 amSEA - PNH
1 stop20h 25mKorean Air
Mon 3/1711:45 pmPNH - SEA
1 stop24h 15mKorean Air
Deal found 2/20$758
This oojo deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1911:35 pmSEA - PNH
1 stop34h 40mPhilippine Airlines
Tue 4/151:15 amPNH - SEA
1 stop32h 05mPhilippine Airlines
Deal found 2/19$823
This FlightHub deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/119:40 amSEA - PNH
1 stop32h 55mSingapore Airlines
Tue 4/16:55 pmPNH - SEA
2 stops35h 58mSingapore Airlines
Deal found 2/19$916
This CrystalTravel deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/22:00 pmSEA - PNH
1 stop17h 55mAsiana Airlines
Sun 11/1611:55 pmPNH - SEA
1 stop27h 40mAsiana Airlines
Deal found 2/20$929
This FlightHub deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/67:00 amPDX - PNH
3 stops40h 05mSingapore Airlines
Tue 6/39:35 amPNH - PDX
2 stops42h 01mSingapore Airlines
Deal found 2/20$945
This Trip.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/311:10 amSEA - PNH
2 stops28h 20mMultiple Airlines
Tue 4/86:50 amPNH - SEA
2 stops26h 40mMultiple Airlines
Deal found 2/20$970
This CheapOair deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/66:10 amSEA - PNH
2 stops26h 05mChina Eastern
Sun 3/1612:15 amPNH - SEA
2 stops30h 38mChina Eastern
Deal found 2/20$1,017
This CrystalTravel deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/11:10 amSEA - PNH
1 stop25h 05mChina Airlines
Sun 11/1611:35 amPNH - SEA
1 stop21h 40mChina Airlines
Deal found 2/20$1,033
This Gurufare deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/276:00 amPDX - PNH
2 stops27h 15mChina Eastern
Sat 7/1912:10 amPNH - PDX
2 stops29h 54mChina Eastern
Deal found 2/19$1,079
This Trip.com deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/209:40 amPDX - PNH
2 stops48h 35mMultiple Airlines
Sat 4/191:15 amPNH - PDX
2 stops33h 21mMultiple Airlines
Deal found 2/18$1,087
This FlightHub deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/241:30 amSEA - PNH
1 stop19h 55mEVA Air
Thu 11/2712:45 pmPNH - SEA
1 stop20h 25mEVA Air
Deal found 2/19$1,092
This EVA Air deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/106:04 pmGEG - PNH
2 stops27h 11mMultiple Airlines
Sat 4/1912:35 pmPNH - GEG
2 stops24h 27mMultiple Airlines
Deal found 2/20$1,261

Find flights from Washington to Phnom Penh within your budget

Customize your flight search to find flights from Washington to Phnom Penh that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 20, 2025.

Fly from

Washington

Fly to

Phnom Penh

Route

Depart

Return

Price

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Thu 3/6

11:00 am-10:25 pm

1 stop20h 25m

Phnom Penh Pochentong

Mon 3/17

11:45 pm-10:00 am

1 stop24h 15m

$758

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 3/19

11:35 pm-12:15 am

1 stop34h 40m

Phnom Penh Pochentong

Tue 4/15

1:15 am-7:20 pm

1 stop32h 05m

$823

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Tue 3/11

9:40 am-8:35 am

1 stop32h 55m

Phnom Penh Pochentong

Tue 4/1

6:55 pm-4:53 pm

2 stops35h 58m

$916

PortlandPhnom Penh

PDX - PNH

PDXPNH

Portland

Tue 5/6

7:00 am-1:05 pm

3 stops40h 05m

Phnom Penh Pochentong

Tue 6/3

9:35 am-1:36 pm

2 stops42h 01m

$945

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Mon 3/31

1:10 am-7:30 pm

2 stops28h 20m

Phnom Penh Pochentong

Tue 4/8

6:50 am-7:30 pm

2 stops26h 40m

$970

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Thu 3/6

12:45 pm-11:20 pm

1 stop19h 35m

Phnom Penh Pochentong

Sun 3/16

12:30 am-11:55 am

1 stop25h 25m

$981

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Thu 3/6

6:10 am-11:15 pm

2 stops26h 05m

Phnom Penh Pochentong

Sun 3/16

12:15 am-4:53 pm

2 stops30h 38m

$1,017

PortlandPhnom Penh

PDX - PNH

PDXPNH

Portland

Fri 6/27

6:00 am-11:15 pm

2 stops27h 15m

Phnom Penh Pochentong

Sat 7/19

12:10 am-4:04 pm

2 stops29h 54m

$1,079

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Mon 3/3

12:10 am-10:35 am

1 stop19h 25m

Phnom Penh Pochentong

Thu 3/27

5:20 pm-7:15 pm

1 stop15h 55m

$1,086

PortlandPhnom Penh

PDX - PNH

PDXPNH

Portland

Thu 3/20

9:40 am-12:15 am

2 stops48h 35m

Phnom Penh Pochentong

Sat 4/19

1:15 am-8:36 pm

2 stops33h 21m

$1,087

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 27 results
1
2
3

Best time to book a flight from Washington to Phnom Penh

Have a flexible travel schedule? Discover the best time to fly to Phnom Penh from Washington with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Washington to Phnom Penh

Get recent, data-driven insights about flights from Washington to Phnom Penh including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from State of Washington to Phnom Penh?

Currently, October is the cheapest month in which you can book a flight from State of Washington to Phnom Penh (average of $1,014). Flying from State of Washington to Phnom Penh in June is currently the most expensive (average of $1,582). 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 WA to PNH?

Find hourly flight availability from Washington to Phnom Penh. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 20, 2025.

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

Rainfall in Phnom Penh by month

Plan your trip to Phnom Penh by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Phnom Penh ranges from 0.0 - 9.8 inches per month. October is typically the wettest month, when rainfall can reach 9.8 in. January is typically the driest time to visit Phnom Penh when rainfall is around 0.0 in.

Temperature in Phnom Penh by month

Plan your trip to Phnom Penh by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Phnom Penh, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 77.0 F).

Reviews of airlines servicing Phnom Penh

Get insights into the airlines that provide service to Phnom Penh. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Phnom Penh. Reviews last updated February 20, 2025.
Get a feel of what it's like to fly with EVA Air, Korean Air and Asiana Airlines from Washington to Phnom Penh by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,200 reviews

Entertainment

8.0

Boarding

8.4

Overall

8.4

Comfort

8.3

Food

8.0

Crew

8.6

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

EVA Air
8.4
Very good
1,200 reviews
EVA Air
8.4
Very good
1,200 reviews

Entertainment

8.0

Boarding

8.4

Overall

8.4

Comfort

8.3

Food

8.0

Crew

8.6

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Korean Air
8.4
Very good
1,037 reviews
EVA Air
8.4
Very good
1,200 reviews

Entertainment

8.0

Boarding

8.4

Overall

8.4

Comfort

8.3

Food

8.0

Crew

8.6

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Asiana Airlines
8.3
Very good
446 reviews
EVA Air
8.4
Very good
1,200 reviews

Entertainment

8.0

Boarding

8.4

Overall

8.4

Comfort

8.3

Food

8.0

Crew

8.6

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

China Airlines
8.2
Very good
727 reviews
EVA Air
8.4
Very good
1,200 reviews

Entertainment

8.0

Boarding

8.4

Overall

8.4

Comfort

8.3

Food

8.0

Crew

8.6

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Singapore Airlines
8.1
Very good
1,301 reviews
EVA Air
8.4
Very good
1,200 reviews

Entertainment

8.0

Boarding

8.4

Overall

8.4

Comfort

8.3

Food

8.0

Crew

8.6

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Related info for your journey

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

    Located just 5.0 mi from the city center, Phnom Penh Pochentong (PNH) is the airport most travelers will use when flying to Phnom Penh from Washington.

  • What are the cheapest airlines to fly from State of Washington to Phnom Penh one-way?

    For one-way options, check prices for Philippine Airlines. According to our data, you can fly for as low as $510. Users have also found prices from $542 and $551 on China Eastern and Asiana Airlines, respectively.

  • What are the most popular routes from State of Washington to Phnom Penh?

    The most popular route from State of Washington to Phnom Penh is Seattle/Tacoma Intl - Phnom Penh Pochentong. You may also consider Portland - Phnom Penh Pochentong or Spokane - Phnom Penh Pochentong.

  • Can I find deals for flights from Washington to Phnom Penh that include hotel bookings?

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

  • How can I find direct flights from Washington to Phnom Penh?

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

  • Can I find deals for business class flights from Washington to Phnom Penh?

    Yes. Cheapflights offers flight deals from Washington to Phnom Penh 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 State of Washington to Phnom Penh?

    Currently, October is the cheapest month in which you can book a flight from State of Washington to Phnom Penh (average of $1,014). Flying from State of Washington to Phnom Penh in June is currently the most expensive (average of $1,582). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington to Phnom Penh

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Phnom Penh flights
John F Kennedy Intl to Phnom Penh flights
Boston to Phnom Penh flights
Ontario to Phnom Penh flights
Seattle to Phnom Penh flights
Santa Ana to Phnom Penh flights
Dallas/Fort Worth to Phnom Penh flights
Newark to Phnom Penh flights
San Francisco to Phnom Penh flights
LaGuardia to Phnom Penh flights
Burbank to Phnom Penh flights
Dulles Intl to Phnom Penh flights
Charlotte to Phnom Penh flights
Minneapolis to Phnom Penh flights
O'Hare Intl to Phnom Penh flights
Atlanta to Phnom Penh flights
Midway to Phnom Penh flights
Reagan-National to Phnom Penh flights
Hobby to Phnom Penh flights
Portland to Phnom Penh flights
Baltimore to Phnom Penh flights
George Bush Intcntl to Phnom Penh flights
Oakland to Phnom Penh flights
Honolulu to Phnom Penh flights
San Jose to Phnom Penh flights
Salt Lake City to Phnom Penh flights
Love Field to Phnom Penh flights
Sky Harbor Intl to Phnom Penh flights
Orlando to Phnom Penh flights
Grand Rapids to Phnom Penh flights
Philadelphia to Phnom Penh flights
Cincinnati to Phnom Penh flights
Denver to Phnom Penh flights
Austin to Phnom Penh flights
Jacksonville to Phnom Penh flights
Nashville to Phnom Penh flights
Sioux Falls to Phnom Penh flights
New Orleans to Phnom Penh flights
San Antonio to Phnom Penh flights
Spokane to Phnom Penh flights
Las Vegas to Phnom Penh flights
Lexington to Phnom Penh flights
Miami to Phnom Penh flights
Boise to Phnom Penh flights
O'Hare Intl to Krong Preah Sihanouk flights

Top 5 airlines flying from Washington to Phnom Penh

Discover the top 5 airlines that operate flights from Washington to Phnom Penh. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Korean AirCheapest$756Average$941FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$783Average$981FlexibilityNo cancel feeOn-time76%
Singapore AirlinesCheapest$796Average$1,136FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$914Average$1,003FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$1,026Average$1,304FlexibilityNo cancel feeOn-time74%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.