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Phnom Penh

$468+ 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 7/30. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PNH
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$947
(Ovago)

One-way from

$468
(Trip.com)

Popular in

December

Cheapest in

January

Average price

$1,497
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 ($39 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Ovago deal was found by Cheapflights users on 6/11. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/175:36 pmPDX - PNH
2 stops29h 19mMultiple Airlines
Wed 10/12:10 pmPNH - PDX
2 stops33h 37mMultiple Airlines
Deal found 6/11$947
This oojo deal was found by Cheapflights users on 6/12. 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 11/35:40 pmPDX - PNH
2 stops25h 55mChina Airlines
Thu 11/205:20 pmPNH - PDX
2 stops31h 27mChina Airlines
Deal found 6/12$975
This oojo deal was found by Cheapflights users on 6/10. 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 11/276:55 pmPDX - PNH
2 stops37h 00mAsiana Airlines
Thu 12/2511:55 pmPNH - PDX
2 stops31h 33mAsiana Airlines
Deal found 6/10$1,006
This oojo deal was found by Cheapflights users on 6/11. 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 9/171:24 pmPDX - PNH
2 stops44h 51mPhilippine Airlines
Tue 9/301:15 amPNH - PDX
2 stops45h 43mPhilippine Airlines
Deal found 6/11$1,049
This oojo deal was found by Cheapflights users on 6/12. 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 7/302:30 pmSEA - PNH
1 stop18h 25mAsiana Airlines
Wed 8/2011:55 pmPNH - SEA
2 stops38h 04mAsiana Airlines
Deal found 6/12$1,071
This oojo deal was found by Cheapflights users on 6/12. 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.
Tue 7/292:10 pmSEA - PNH
2 stops44h 05mPhilippine Airlines
Thu 8/211:15 amPNH - SEA
2 stops47h 01mPhilippine Airlines
Deal found 6/12$1,072
This Mytrip deal was found by Cheapflights users on 6/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/41:40 amSEA - PNH
2 stops24h 40mMultiple Airlines
Thu 9/41:15 amPNH - SEA
1 stop32h 00mMultiple Airlines
Deal found 6/11$1,078
This Korean Air deal was found by Cheapflights users on 6/9. 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 11/22:00 pmSEA - PNH
2 stops41h 25mKorean Air
Sat 2/2811:45 pmPNH - SEA
2 stops31h 29mKorean Air
Deal found 6/9$1,084
This Cathay Pacific deal was found by Cheapflights users on 6/9. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/53:50 pmSEA - PNH
2 stops34h 55mCathay Pacific
Sun 1/117:05 pmPNH - SEA
2 stops39h 02mCathay Pacific
Deal found 6/9$1,117
This EVA Air deal was found by Cheapflights users on 6/9. 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.
Tue 8/121:10 amSEA - PNH
1 stop20h 05mEVA Air
Fri 11/1412:45 pmPNH - SEA
1 stop20h 25mEVA Air
Deal found 6/9$1,154
This FlightHub deal was found by Cheapflights users on 6/12. 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.
Mon 7/281:40 amSEA - PNH
1 stop18h 10mChina Airlines
Thu 8/215:10 pmPNH - SEA
1 stop16h 35mChina Airlines
Deal found 6/12$1,162
This FlightHub deal was found by Cheapflights users on 6/9. 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.
Thu 12/48:45 amSEA - PNH
1 stop32h 50mSingapore Airlines
Thu 1/87:45 pmPNH - SEA
1 stop26h 25mSingapore Airlines
Deal found 6/9$1,170

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 June 12, 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

PortlandPhnom Penh

PDX - PNH

PDXPNH

Portland

Wed 9/17

5:36 pm-12:55 pm

2 stops29h 19m

Phnom Penh Pochentong

Wed 10/1

2:10 pm-9:47 am

2 stops33h 37m

$947

PortlandPhnom Penh

PDX - PNH

PDXPNH

Portland

Mon 11/3

5:40 pm-10:35 am

2 stops25h 55m

Phnom Penh Pochentong

Thu 11/20

5:20 pm-9:47 am

2 stops31h 27m

$975

PortlandPhnom Penh

PDX - PNH

PDXPNH

Portland

Thu 11/27

6:55 pm-10:55 pm

2 stops37h 00m

Phnom Penh Pochentong

Thu 12/25

11:55 pm-4:28 pm

2 stops31h 33m

$1,006

PortlandPhnom Penh

PDX - PNH

PDXPNH

Portland

Wed 9/17

1:24 pm-12:15 am

2 stops44h 51m

Phnom Penh Pochentong

Tue 9/30

1:15 am-8:58 am

2 stops45h 43m

$1,049

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 7/30

2:30 pm-10:55 pm

1 stop18h 25m

Phnom Penh Pochentong

Wed 8/20

11:55 pm-11:59 pm

2 stops38h 04m

$1,071

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Tue 7/29

2:10 pm-12:15 am

2 stops44h 05m

Phnom Penh Pochentong

Thu 8/21

1:15 am-10:16 am

2 stops47h 01m

$1,072

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Mon 8/4

1:40 am-4:20 pm

2 stops24h 40m

Phnom Penh Pochentong

Thu 9/4

1:15 am-7:15 pm

1 stop32h 00m

$1,078

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sun 11/2

2:00 pm-10:25 pm

2 stops41h 25m

Phnom Penh Pochentong

Sat 2/28

11:45 pm-4:14 pm

2 stops31h 29m

$1,084

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Fri 12/5

3:50 pm-5:45 pm

2 stops34h 55m

Phnom Penh Pochentong

Sun 1/11

7:05 pm-7:07 pm

2 stops39h 02m

$1,117

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Tue 8/12

1:10 am-11:15 am

1 stop20h 05m

Phnom Penh Pochentong

Fri 11/14

12:45 pm-6:10 pm

1 stop20h 25m

$1,154

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 32 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 $991). Flying from State of Washington to Phnom Penh in June is currently the most expensive (average of $1,570). 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 June 12, 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 June 12, 2025.
Get a feel of what it's like to fly with EVA Air, Korean Air and China 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
1,202 reviews

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
EVA Air
8.4
Very good
1,202 reviews
EVA Air
8.4
Very good
1,202 reviews

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Korean Air
8.4
Very good
1,088 reviews
EVA Air
8.4
Very good
1,202 reviews

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
China Airlines
8.3
Very good
738 reviews
EVA Air
8.4
Very good
1,202 reviews

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Asiana Airlines
8.2
Very good
440 reviews
EVA Air
8.4
Very good
1,202 reviews

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Singapore Airlines
8.1
Very good
1,302 reviews
EVA Air
8.4
Very good
1,202 reviews

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

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 Asiana Airlines. According to our data, you can fly for as low as $489. Users have also found prices from $500 and $526 on Korean Air and Singapore 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, March is the cheapest month in which you can book a flight from State of Washington to Phnom Penh (average of $991). Flying from State of Washington to Phnom Penh in June is currently the most expensive (average of $1,570). 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.

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Philippine AirlinesCheapest$693Average$925FlexibilityNo cancel feeOn-time60%
Korean AirCheapest$756Average$974FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$782Average$1,038FlexibilityNo cancel feeOn-time76%
Singapore AirlinesCheapest$806Average$1,138FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$944Average$1,358FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$1,004Average$1,300FlexibilityNo cancel feeOn-time74%

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