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Phnom Penh

$418+ 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 2/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PNH
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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Cheap flight deals from Washington to Phnom Penh

Discover tips and strategies to find the most affordable flight options for your journey from Washington (USWA) to Phnom Penh (PNH). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Round-trip from

$790
(United Airlines)

One-way from

$418
(oojo)
From Washington to Phnom Penh Pochentong
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One-way flight from Washington to Phnom Penh Pochentong
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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 January 21, 2025.

This United Airlines deal was found by Cheapflights users on 1/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/207:32 pmSEA - PNH
2 stops31h 58mMultiple Airlines
Sun 3/211:45 pmPNH - SEA
2 stops31h 09mMultiple Airlines
Deal found 1/21$788
This oojo deal was found by Cheapflights users on 1/21. 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 3/711:00 amSEA - PNH
1 stop20h 25mKorean Air
Sun 3/3011:40 pmPNH - SEA
1 stop25h 10mKorean Air
Deal found 1/21$801
This Gotogate deal was found by Cheapflights users on 1/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/712:45 pmSEA - PNH
1 stop19h 35mAsiana Airlines
Thu 3/1312:30 amPNH - SEA
1 stop25h 25mAsiana Airlines
Deal found 1/20$844
This Ovago deal was found by Cheapflights users on 1/20. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1211:35 pmSEA - PNH
1 stop34h 40mPhilippine Airlines
Thu 4/31:15 amPNH - SEA
1 stop32h 05mPhilippine Airlines
Deal found 1/20$893
This Gurufare deal was found by Cheapflights users on 1/21. 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.
Mon 3/36:00 amPDX - PNH
2 stops26h 15mChina Eastern
Sun 3/912:15 amPNH - PDX
2 stops29h 44mChina Eastern
Deal found 1/21$913
This FlightHub deal was found by Cheapflights users on 1/21. 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 4/87:10 amSEA - PNH
2 stops26h 05mChina Eastern
Mon 4/2112:10 amPNH - SEA
2 stops30h 50mChina Eastern
Deal found 1/21$957
This oojo deal was found by Cheapflights users on 1/20. 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.
Mon 4/71:10 amSEA - PNH
1 stop18h 40mChina Airlines
Thu 5/85:10 pmPNH - SEA
1 stop16h 20mChina Airlines
Deal found 1/20$977
This ScholarTrip deal was found by Cheapflights users on 1/21. 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 ScholarTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1210:15 amSEA - PNH
1 stop32h 25mSingapore Airlines
Thu 8/286:55 pmPNH - SEA
1 stop27h 50mSingapore Airlines
Deal found 1/21$1,028
This United Airlines deal was found by Cheapflights users on 1/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/37:42 pmPDX - PNH
2 stops27h 23mMultiple Airlines
Mon 3/103:05 pmPNH - PDX
2 stops32h 08mMultiple Airlines
Deal found 1/21$1,034
This FlightHub deal was found by Cheapflights users on 1/21. 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 3/171:10 amSEA - PNH
1 stop20h 15mEVA Air
Wed 4/2312:35 pmPNH - SEA
1 stop20h 55mEVA Air
Deal found 1/21$1,054
This FlightHub deal was found by Cheapflights users on 1/21. 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.
Wed 10/157:30 amPDX - PNH
2 stops44h 10mSingapore Airlines
Fri 10/311:45 pmPNH - PDX
2 stops37h 34mSingapore Airlines
Deal found 1/21$1,255
This FlightHub deal was found by Cheapflights users on 1/21. 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.
Wed 10/1510:40 amPDX - PNH
3 stops39h 20mQatar Airways
Fri 10/315:10 pmPNH - PDX
3 stops37h 39mQatar Airways
Deal found 1/21$1,687

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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Thu 2/20

7:32 pm-6:30 pm

2 stops31h 58m

Phnom Penh Pochentong

Sun 3/2

11:45 pm-3:54 pm

2 stops31h 09m

$788

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Fri 3/7

11:00 am-10:25 pm

1 stop20h 25m

Phnom Penh Pochentong

Sun 3/30

11:40 pm-10:50 am

1 stop25h 10m

$801

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Fri 3/7

12:45 pm-11:20 pm

1 stop19h 35m

Phnom Penh Pochentong

Thu 3/13

12:30 am-11:55 am

1 stop25h 25m

$844

PortlandPhnom Penh

PDX - PNH

PDXPNH

Portland

Mon 3/3

6:00 am-11:15 pm

2 stops26h 15m

Phnom Penh Pochentong

Sun 3/9

12:15 am-3:59 pm

2 stops29h 44m

$913

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sun 4/6

11:30 pm-12:15 am

1 stop34h 45m

Phnom Penh Pochentong

Tue 4/29

1:15 am-7:20 pm

1 stop32h 05m

$923

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Tue 4/8

7:10 am-11:15 pm

2 stops26h 05m

Phnom Penh Pochentong

Mon 4/21

12:10 am-5:00 pm

2 stops30h 50m

$957

PortlandPhnom Penh

PDX - PNH

PDXPNH

Portland

Mon 3/3

7:42 pm-2:05 pm

2 stops27h 23m

Phnom Penh Pochentong

Mon 3/10

3:05 pm-9:13 am

2 stops32h 08m

$1,034

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Mon 3/17

1:10 am-11:25 am

1 stop20h 15m

Phnom Penh Pochentong

Wed 4/23

12:35 pm-7:30 pm

1 stop20h 55m

$1,054

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 4/9

10:12 am-8:40 am

3 stops32h 28m

Phnom Penh Pochentong

Mon 4/28

6:55 pm-4:40 pm

2 stops35h 45m

$1,097

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Thu 3/6

5:00 am-11:20 pm

2 stops27h 20m

Phnom Penh Pochentong

Wed 3/12

12:30 am-6:38 pm

2 stops32h 08m

$1,188

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 19 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.

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 January 21, 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 January 21, 2025.
Get a feel of what it's like to fly with Singapore Airlines and China Eastern 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.
Korean Air
8.5
Very good
1,039 reviews

Comfort

8.3

Crew

8.7

Food

8.1

Entertainment

8.2

Boarding

8.5

Overall

8.5

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

Korean Air
8.5
Very good
1,039 reviews
Korean Air
8.5
Very good
1,039 reviews

Comfort

8.3

Crew

8.7

Food

8.1

Entertainment

8.2

Boarding

8.5

Overall

8.5

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

EVA Air
8.4
Very good
1,255 reviews
Korean Air
8.5
Very good
1,039 reviews

Comfort

8.3

Crew

8.7

Food

8.1

Entertainment

8.2

Boarding

8.5

Overall

8.5

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

Asiana Airlines
8.3
Very good
466 reviews
Korean Air
8.5
Very good
1,039 reviews

Comfort

8.3

Crew

8.7

Food

8.1

Entertainment

8.2

Boarding

8.5

Overall

8.5

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

China Airlines
8.2
Very good
737 reviews
Korean Air
8.5
Very good
1,039 reviews

Comfort

8.3

Crew

8.7

Food

8.1

Entertainment

8.2

Boarding

8.5

Overall

8.5

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

Singapore Airlines
8.1
Very good
1,328 reviews
Korean Air
8.5
Very good
1,039 reviews

Comfort

8.3

Crew

8.7

Food

8.1

Entertainment

8.2

Boarding

8.5

Overall

8.5

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

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 $418. Users have also found prices from $487 and $520 on China Eastern and Korean Air, 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

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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 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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$728Average$1,089FlexibilityNo cancel feeOn-time81%
Korean AirCheapest$782Average$1,061FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$790Average$986FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$877Average$1,004FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$1,026Average$1,303FlexibilityNo cancel feeOn-time74%
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