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Phnom Penh

$923+ 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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PNH
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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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 September 15, 2025.

Round-trip from

$1,675
(Etihad Airways)

One-way from

$923
(Mytrip)

Popular in

December

Cheapest in

September

Average price

$868
From Washington to Phnom Penh Pochentong
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One-way flight from Washington to Phnom Penh Pochentong
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Highest demand for flights based on searches. 5% potential increase in price ($66 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($41 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 15, 2025.

This Etihad Airways deal was found by Cheapflights users on 9/15. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2411:56 pmSEA - PNH
2 stops40h 34mMultiple Airlines
Mon 11/107:55 amPNH - SEA
2 stops54h 23mMultiple Airlines
Deal found 9/15$1,675
This Etihad Airways deal was found by Cheapflights users on 9/15. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/411:59 pmSEA - PNH
2 stops40h 56mMultiple Airlines
Sat 10/258:30 amPNH - SEA
2 stops43h 16mMultiple Airlines
Deal found 9/15$1,763
This Etihad Airways deal was found by Cheapflights users on 9/15. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1311:58 pmPDX - PNH
2 stops40h 57mMultiple Airlines
Sat 11/157:50 pmPNH - PDX
2 stops31h 46mMultiple Airlines
Deal found 9/15$1,988
This Etihad Airways deal was found by Cheapflights users on 9/14. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2512:34 amSEA - PNH
2 stops39h 56mMultiple Airlines
Thu 10/307:55 amPNH - SEA
2 stops43h 51mMultiple Airlines
Deal found 9/14$2,145
This Etihad Airways deal was found by Cheapflights users on 9/15. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2212:34 amSEA - PNH
2 stops40h 21mMultiple Airlines
Sat 1/317:50 pmPNH - SEA
2 stops41h 29mMultiple Airlines
Deal found 9/15$2,147
This Etihad Airways deal was found by Cheapflights users on 9/15. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1112:34 amSEA - PNH
2 stops40h 21mMultiple Airlines
Thu 10/168:30 amPNH - SEA
2 stops50h 16mMultiple Airlines
Deal found 9/15$2,232
This Etihad Airways deal was found by Cheapflights users on 9/15. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1511:56 pmSEA - PNH
2 stops40h 59mMultiple Airlines
Sat 11/157:50 pmPNH - SEA
2 stops33h 04mMultiple Airlines
Deal found 9/15$2,394
This Etihad Airways deal was found by Cheapflights users on 9/14. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1412:59 amSEA - PNH
2 stops38h 31mMultiple Airlines
Tue 11/257:55 amPNH - SEA
2 stops44h 59mMultiple Airlines
Deal found 9/14$2,975
This Etihad Airways deal was found by Cheapflights users on 9/13. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2312:12 amSEA - PNH
2 stops39h 18mMultiple Airlines
Sat 1/107:50 pmPNH - SEA
2 stops41h 29mMultiple Airlines
Deal found 9/13$3,105

Cheapflights Fare Finder

 
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 September 15, 2025.
Use the filters below to find and compare flights from Washington to Phnom Penh that are best for you.

Fly from

Washington

Fly to

Phnom Penh

Route

Depart

Return

Price

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Fri 10/24

11:56 pm-6:30 am

2 stops40h 34m

Phnom Penh Pochentong

Mon 11/10

7:55 am-11:18 pm

2 stops54h 23m

$1,675

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sat 10/4

11:59 pm-6:55 am

2 stops40h 56m

Phnom Penh Pochentong

Sat 10/25

8:30 am-12:27 am

2 stops53h 57m

$1,775

PortlandPhnom Penh

PDX - PNH

PDXPNH

Portland

Mon 10/13

11:58 pm-6:55 am

2 stops40h 57m

Phnom Penh Pochentong

Sat 11/15

7:50 pm-12:36 pm

2 stops31h 46m

$1,988

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sun 10/26

6:10 am-6:30 am

2 stops34h 20m

Phnom Penh Pochentong

Thu 10/30

7:55 am-11:13 pm

2 stops53h 18m

$2,145

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 10/22

12:34 am-6:55 am

2 stops40h 21m

Phnom Penh Pochentong

Sat 1/31

7:50 pm-10:19 pm

2 stops41h 29m

$2,147

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sun 10/12

6:10 am-6:55 am

2 stops34h 45m

Phnom Penh Pochentong

Thu 10/16

8:30 am-8:46 pm

2 stops50h 16m

$2,232

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sat 1/3

12:14 am-6:30 am

2 stops39h 16m

Phnom Penh Pochentong

Thu 1/15

7:50 pm-10:19 pm

2 stops41h 29m

$2,369

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 10/15

11:56 pm-6:55 am

2 stops40h 59m

Phnom Penh Pochentong

Sat 11/15

7:50 pm-1:54 pm

2 stops33h 04m

$2,394

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sun 10/12

7:15 am-6:55 am

3 stops33h 40m

$923

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sun 10/19

9:21 am-6:55 am

2 stops31h 34m

$1,070

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 13 results
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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.

Cheapflights Insights

Everything you need to know about your flight from Washington to Phnom Penh

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

Currently, March is the cheapest month in which you can book a flight from State of Washington to Phnom Penh (average of $982). Flying from State of Washington to Phnom Penh in June is currently the most expensive (average of $1,552). 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 September 15, 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.

How much does it cost to fly round-trip from State of Washington to Phnom Penh?

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 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, March is the cheapest month in which you can book a flight from State of Washington to Phnom Penh (average of $982). Flying from State of Washington to Phnom Penh in June is currently the most expensive (average of $1,552). 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

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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
Seattle to Phnom Penh flights
Boston to Phnom Penh flights
San Francisco to Phnom Penh flights
Dulles Intl to Phnom Penh flights
John F Kennedy Intl to Phnom Penh flights
Honolulu to Phnom Penh flights
Miami to Phnom Penh flights
O'Hare Intl to Phnom Penh flights
Atlanta to Phnom Penh flights
Newark to Phnom Penh flights
Denver to Phnom Penh flights
Dallas/Fort Worth to Phnom Penh flights
Jacksonville to Phnom Penh flights
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Kailua-Kona to Phnom Penh flights
Los Angeles to Krong Preah Sihanouk flights
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Memphis to Phnom Penh flights

Top 6 airlines flying from Washington to Phnom Penh

Discover the top 6 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Philippine AirlinesCheapest$693Average$925FlexibilityNo cancel feeOn-time60%
Singapore AirlinesCheapest$702Average$1,028FlexibilityNo cancel feeOn-time81%
Korean AirCheapest$756Average$927FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$774Average$1,045FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$961Average$1,353FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$971Average$1,304FlexibilityNo cancel feeOn-time74%

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