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Phnom Penh

$393+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PNH
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
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 July 30, 2025.

Round-trip from

$875
(Korean Air)

One-way from

$384
(CrystalTravel)

Popular in

December

Cheapest in

January

Average price

$1,340
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. 3% potential increase in price ($38 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 30, 2025.

This oojo deal was found by Cheapflights users on 7/30. 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.
Fri 8/12:30 pmSEA - PNH
1 stop18h 25mAsiana Airlines
Sat 8/3011:55 pmPNH - SEA
1 stop26h 50mAsiana Airlines
Deal found 7/30$862
This Gurufare deal was found by Cheapflights users on 7/30. 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 8/87:20 amSEA - PNH
2 stops25h 55mChina Eastern
Sat 8/3012:10 amPNH - SEA
2 stops30h 41mChina Eastern
Deal found 7/30$863
This Korean Air deal was found by Cheapflights users on 7/30. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/243:05 pmSEA - PNH
2 stops41h 05mKorean Air
Thu 8/2811:30 pmPNH - SEA
1 stop25h 20mKorean Air
Deal found 7/30$870
This Justfly.com deal was found by Cheapflights users on 7/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/228:45 amSEA - PNH
1 stop42h 45mSingapore Airlines
Wed 12/32:40 pmPNH - SEA
1 stop31h 30mSingapore Airlines
Deal found 7/30$889
This Orbitz deal was found by Cheapflights users on 7/30. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/136:50 pmSEA - PNH
2 stops37h 20mMultiple Airlines
Sat 10/41:15 amPNH - SEA
1 stop32h 00mMultiple Airlines
Deal found 7/30$921
This oojo deal was found by Cheapflights users on 7/30. 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.
Mon 11/172:30 pmPDX - PNH
2 stops41h 25mAsiana Airlines
Fri 12/511:55 pmPNH - PDX
2 stops35h 43mAsiana Airlines
Deal found 7/30$930
This oojo deal was found by Cheapflights users on 7/29. 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 10/2211:24 amSEA - PNH
2 stops46h 51mPhilippine Airlines
Tue 11/111:15 amPNH - SEA
1 stop32h 20mPhilippine Airlines
Deal found 7/29$938
This oojo deal was found by Cheapflights users on 7/29. 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.
Sat 10/251:10 amSEA - PNH
1 stop25h 05mChina Airlines
Thu 10/305:20 pmPNH - SEA
1 stop15h 50mChina Airlines
Deal found 7/29$945
This Gurufare deal was found by Cheapflights users on 7/29. 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.
Tue 11/187:20 amPDX - PNH
2 stops36h 20mMultiple Airlines
Tue 12/212:25 amPNH - PDX
2 stops27h 54mMultiple Airlines
Deal found 7/29$969
This oojo deal was found by Cheapflights users on 7/27. 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 9/118:10 pmPDX - PNH
2 stops47h 40mChina Airlines
Thu 9/185:10 pmPNH - PDX
2 stops40h 00mChina Airlines
Deal found 7/27$975
This China Eastern deal was found by Cheapflights users on 7/28. 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 China Eastern is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/186:45 amGEG - PNH
2 stops26h 30mChina Eastern
Sun 9/2112:10 amPNH - GEG
2 stops35h 21mChina Eastern
Deal found 7/28$1,013
This FlightHub deal was found by Cheapflights users on 7/29. 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 11/187:20 amPDX - PNH
3 stops34h 15mSingapore Airlines
Wed 12/37:40 pmPNH - PDX
2 stops32h 39mSingapore Airlines
Deal found 7/29$1,048

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 July 30, 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

Sat 1/3

12:10 am-2:00 pm

2 stops22h 50m

Phnom Penh Pochentong

Thu 1/15

11:55 pm-1:55 pm

1 stop29h 00m

$862

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 8/27

7:10 am-11:15 pm

2 stops26h 05m

Phnom Penh Pochentong

Sat 8/30

12:10 am-4:51 pm

2 stops30h 41m

$863

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Fri 8/29

7:10 am-10:10 pm

2 stops25h 00m

Phnom Penh Pochentong

Fri 9/5

11:30 pm-10:40 am

1 stop25h 10m

$865

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Mon 1/5

7:23 pm-10:55 pm

2 stops36h 32m

Phnom Penh Pochentong

Mon 2/9

11:55 pm-1:55 pm

1 stop29h 00m

$877

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sat 11/22

8:45 am-6:30 pm

1 stop42h 45m

Phnom Penh Pochentong

Wed 12/3

2:40 pm-7:10 am

1 stop31h 30m

$889

PortlandPhnom Penh

PDX - PNH

PDXPNH

Portland

Mon 11/17

2:30 pm-10:55 pm

2 stops41h 25m

Phnom Penh Pochentong

Fri 12/5

11:55 pm-8:38 pm

2 stops35h 43m

$930

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 10/22

11:24 am-12:15 am

2 stops46h 51m

Phnom Penh Pochentong

Tue 11/11

1:15 am-6:35 pm

1 stop32h 20m

$938

PortlandPhnom Penh

PDX - PNH

PDXPNH

Portland

Tue 11/18

7:20 am-10:40 am

2 stops36h 20m

Phnom Penh Pochentong

Tue 12/2

12:25 am-1:19 pm

2 stops27h 54m

$969

PortlandPhnom Penh

PDX - PNH

PDXPNH

Portland

Thu 9/11

8:10 pm-9:50 am

2 stops47h 40m

Phnom Penh Pochentong

Thu 9/18

5:10 pm-7:10 pm

2 stops40h 00m

$975

SpokanePhnom Penh

GEG - PNH

GEGPNH

Spokane

Thu 9/18

6:45 am-11:15 pm

2 stops26h 30m

Phnom Penh Pochentong

Sun 9/21

12:10 am-9:31 pm

2 stops35h 21m

$1,013

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 19 results
1
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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 $988). Flying from State of Washington to Phnom Penh in June is currently the most expensive (average of $1,549). 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 July 30, 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.

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 July 30, 2025.
Peruse reviews from past customers who have flown with Korean Air, China Airlines, and Asiana Airlines from Washington to Phnom Penh to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,121 reviews

Crew

8.7

Entertainment

8.2

Food

8.1

Overall

8.4

Boarding

8.5

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,121 reviews
Korean Air
8.4
Very good
1,121 reviews

Crew

8.7

Entertainment

8.2

Food

8.1

Overall

8.4

Boarding

8.5

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
China Airlines
8.3
Very good
754 reviews
Korean Air
8.4
Very good
1,121 reviews

Crew

8.7

Entertainment

8.2

Food

8.1

Overall

8.4

Boarding

8.5

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Asiana Airlines
8.2
Very good
467 reviews
Korean Air
8.4
Very good
1,121 reviews

Crew

8.7

Entertainment

8.2

Food

8.1

Overall

8.4

Boarding

8.5

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Singapore Airlines
8.1
Very good
1,338 reviews
Korean Air
8.4
Very good
1,121 reviews

Crew

8.7

Entertainment

8.2

Food

8.1

Overall

8.4

Boarding

8.5

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Delta
8.0
Very good
7,980 reviews
Korean Air
8.4
Very good
1,121 reviews

Crew

8.7

Entertainment

8.2

Food

8.1

Overall

8.4

Boarding

8.5

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

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 $988). Flying from State of Washington to Phnom Penh in June is currently the most expensive (average of $1,549). 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.
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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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Philippine AirlinesCheapest$693Average$925FlexibilityNo cancel feeOn-time60%
Singapore AirlinesCheapest$702Average$1,093FlexibilityNo cancel feeOn-time81%
Korean AirCheapest$756Average$942FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$791Average$1,049FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$948Average$1,350FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$984Average$1,317FlexibilityNo cancel feeOn-time74%

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