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Phnom Penh

$799+ Cheap flights from Washington to Phnom Penh (PNH)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PNH
Apr 8 — Apr 151
Tue 4/8
Tue 4/15
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 April 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$799
(Korean Air)

Popular in

June

Cheapest in

January

Average price

$950
Provider with most accurate pricing for Seattle/Tacoma Intl-Phnom Penh Pochentong flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Phnom Penh Pochentong flights.
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From Washington to Phnom Penh Pochentong
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($228 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($43 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 3, 2025.

This Korean Air deal was found by Cheapflights users on 4/3. 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.
Mon 4/2812:50 pmSEA - PNH
1 stop19h 20mKorean Air
Sat 5/1011:30 pmPNH - SEA
2 stops31h 15mKorean Air
Deal found 4/3$799
This oojo deal was found by Cheapflights users on 4/3. 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 9/311:35 pmSEA - PNH
1 stop34h 40mPhilippine Airlines
Tue 9/91:15 amPNH - SEA
1 stop32h 00mPhilippine Airlines
Deal found 4/3$807
This Justfly.com deal was found by Cheapflights users on 4/2. 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 9/2010:15 amSEA - PNH
1 stop41h 25mSingapore Airlines
Sat 10/189:35 amPNH - SEA
1 stop37h 10mSingapore Airlines
Deal found 4/2$922
This oojo deal was found by Cheapflights users on 4/3. 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 9/32:15 pmSEA - PNH
1 stop18h 40mAsiana Airlines
Wed 9/1011:55 pmPNH - SEA
1 stop26h 35mAsiana Airlines
Deal found 4/3$966
This StudentUniverse deal was found by Cheapflights users on 4/3. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/35:59 pmSEA - PNH
2 stops32h 56mMultiple Airlines
Wed 9/102:10 pmPNH - SEA
2 stops22h 56mMultiple Airlines
Deal found 4/3$980
This Ovago deal was found by Cheapflights users on 4/2. 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 8/275:55 pmPDX - PNH
2 stops29h 00mMultiple Airlines
Wed 9/102:10 pmPNH - PDX
2 stops23h 41mMultiple Airlines
Deal found 4/2$988
This oojo deal was found by Cheapflights users on 4/3. 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 4/81:10 amSEA - PNH
1 stop24h 55mChina Airlines
Thu 5/225:10 pmPNH - SEA
1 stop16h 20mChina Airlines
Deal found 4/3$1,076
This Booking.com deal was found by Cheapflights users on 4/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2310:00 amPDX - PNH
3 stops37h 10mAir Canada
Fri 10/36:55 pmPNH - PDX
2 stops37h 51mAir Canada
Deal found 4/2$1,125
This FlightHub deal was found by Cheapflights users on 4/2. 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.
Sat 9/131:30 amSEA - PNH
1 stop19h 45mEVA Air
Sat 10/1112:35 pmPNH - SEA
1 stop20h 15mEVA Air
Deal found 4/2$1,130
This Korean Air deal was found by Cheapflights users on 4/2. 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.
Mon 8/256:00 amPDX - PNH
2 stops26h 10mKorean Air
Tue 9/911:30 pmPNH - PDX
2 stops27h 49mKorean Air
Deal found 4/2$1,169
This Gurufare deal was found by Cheapflights users on 4/2. 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 8/257:00 amPDX - PNH
3 stops35h 40mSingapore Airlines
Fri 9/126:55 pmPNH - PDX
2 stops32h 55mSingapore Airlines
Deal found 4/2$1,297
This FlightHub deal was found by Cheapflights users on 4/3. 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 4/287:10 amSEA - PNH
2 stops26h 05mChina Eastern
Fri 5/912:10 amPNH - SEA
2 stops30h 35mChina Eastern
Deal found 4/3$1,300

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 April 3, 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

Mon 4/28

12:50 pm-10:10 pm

1 stop19h 20m

Phnom Penh Pochentong

Sat 5/10

11:30 pm-4:45 pm

2 stops31h 15m

$799

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 9/3

11:35 pm-12:15 am

1 stop34h 40m

Phnom Penh Pochentong

Tue 9/9

1:15 am-7:15 pm

1 stop32h 00m

$807

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sat 9/20

10:15 am-5:40 pm

1 stop41h 25m

Phnom Penh Pochentong

Sat 10/18

9:35 am-8:45 am

1 stop37h 10m

$922

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 9/3

2:15 pm-10:55 pm

1 stop18h 40m

Phnom Penh Pochentong

Wed 9/10

11:55 pm-12:30 pm

1 stop26h 35m

$966

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 9/3

5:59 pm-4:55 pm

2 stops32h 56m

Phnom Penh Pochentong

Wed 9/10

2:10 pm-11:06 pm

2 stops22h 56m

$980

PortlandPhnom Penh

PDX - PNH

PDXPNH

Portland

Wed 8/27

5:55 pm-12:55 pm

2 stops29h 00m

Phnom Penh Pochentong

Wed 9/10

2:10 pm-11:51 pm

2 stops23h 41m

$988

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 9/3

1:30 am-11:15 am

1 stop19h 45m

Phnom Penh Pochentong

Fri 9/26

12:35 pm-7:30 pm

1 stop20h 55m

$1,092

PortlandPhnom Penh

PDX - PNH

PDXPNH

Portland

Tue 9/23

10:00 am-1:10 pm

3 stops37h 10m

Phnom Penh Pochentong

Fri 10/3

6:55 pm-6:46 pm

2 stops37h 51m

$1,125

PortlandPhnom Penh

PDX - PNH

PDXPNH

Portland

Mon 8/25

11:04 am-10:10 pm

2 stops21h 06m

Phnom Penh Pochentong

Mon 9/8

11:30 pm-10:20 pm

2 stops36h 50m

$1,169

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Mon 6/2

1:10 am-9:50 am

1 stop18h 40m

Phnom Penh Pochentong

Mon 9/8

5:10 pm-7:45 pm

1 stop16h 35m

$1,261

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/3

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 $994). 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 April 3, 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 April 3, 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
1,170 reviews

Overall

8.4

Boarding

8.4

Crew

8.6

Entertainment

8.0

Comfort

8.3

Food

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
EVA Air
8.4
Very good
1,170 reviews
EVA Air
8.4
Very good
1,170 reviews

Overall

8.4

Boarding

8.4

Crew

8.6

Entertainment

8.0

Comfort

8.3

Food

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Korean Air
8.4
Very good
1,051 reviews
EVA Air
8.4
Very good
1,170 reviews

Overall

8.4

Boarding

8.4

Crew

8.6

Entertainment

8.0

Comfort

8.3

Food

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
China Airlines
8.2
Very good
725 reviews
EVA Air
8.4
Very good
1,170 reviews

Overall

8.4

Boarding

8.4

Crew

8.6

Entertainment

8.0

Comfort

8.3

Food

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Asiana Airlines
8.2
Very good
438 reviews
EVA Air
8.4
Very good
1,170 reviews

Overall

8.4

Boarding

8.4

Crew

8.6

Entertainment

8.0

Comfort

8.3

Food

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Singapore Airlines
8.1
Very good
1,288 reviews
EVA Air
8.4
Very good
1,170 reviews

Overall

8.4

Boarding

8.4

Crew

8.6

Entertainment

8.0

Comfort

8.3

Food

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.

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 $994). 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 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 April 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Philippine AirlinesCheapest$693Average$925FlexibilityNo cancel feeOn-time60%
Korean AirCheapest$756Average$978FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$772Average$987FlexibilityNo cancel feeOn-time76%
Singapore AirlinesCheapest$796Average$1,110FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$914Average$1,004FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$984Average$1,283FlexibilityNo cancel feeOn-time74%

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