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Phnom Penh

$524+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PNH
may. 5 — may. 121
lun. 5/5
lun. 5/12
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 abril 30, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$960
(FlightHub)

One-way from

$524
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$937
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
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One-way flight from Washington to Phnom Penh Pochentong
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Highest demand for flights based on searches. 17% potential increase in price ($234 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 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 abril 30, 2025.

This FlightHub deal was found by Cheapflights users on 4/29. 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.
jue. 11/278:45 amSEA - PNH
1 stop32h 50mSingapore Airlines
jue. 12/259:35 amPNH - SEA
1 stop36h 35mSingapore Airlines
Deal found 4/29$835
This Gurufare deal was found by Cheapflights users on 4/29. 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.
dom. 11/3011:55 pmSEA - PNH
1 stop33h 20mPhilippine Airlines
mar. 12/231:15 amPNH - SEA
1 stop33h 20mPhilippine Airlines
Deal found 4/29$842
This oojo deal was found by Cheapflights users on 4/29. 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.
mié. 10/292:00 pmSEA - PNH
1 stop18h 55mAsiana Airlines
jue. 11/2711:55 pmPNH - SEA
1 stop27h 40mAsiana Airlines
Deal found 4/29$907
This KAYAK deal was found by Cheapflights users on 4/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/32:15 pmSEA - PNH
1 stop18h 40mMultiple Airlines
mié. 9/104:40 pmPNH - SEA
2 stops33h 50mMultiple Airlines
Deal found 4/29$931
This FlightHub deal was found by Cheapflights users on 4/29. 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.
mar. 9/27:20 amSEA - PNH
2 stops25h 55mChina Eastern
mié. 10/112:10 amPNH - SEA
2 stops30h 49mChina Eastern
Deal found 4/29$941
This Trip.com deal was found by Cheapflights users on 4/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/281:10 amSEA - PNH
1 stop25h 05mChina Airlines
jue. 11/275:20 pmPNH - SEA
1 stop15h 55mChina Airlines
Deal found 4/29$950
This StudentUniverse deal was found by Cheapflights users on 4/28. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/219:35 pmPDX - PNH
2 stops35h 40mMultiple Airlines
lun. 6/212:10 amPNH - PDX
2 stops30h 14mMultiple Airlines
Deal found 4/28$991
This oojo deal was found by Cheapflights users on 4/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/112:50 pmSEA - PNH
1 stop19h 20mKorean Air
mié. 5/1411:30 pmPNH - SEA
1 stop25h 10mKorean Air
Deal found 4/28$1,013
This FlightHub deal was found by Cheapflights users on 4/29. 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.
mié. 9/101:30 amSEA - PNH
1 stop19h 45mEVA Air
mié. 10/1512:35 pmPNH - SEA
1 stop20h 55mEVA Air
Deal found 4/29$1,058
This oojo deal was found by Cheapflights users on 4/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/292:40 pmPDX - PNH
2 stops35h 25mChina Airlines
lun. 6/95:10 pmPNH - PDX
2 stops30h 18mChina Airlines
Deal found 4/28$1,060
This FlightHub deal was found by Cheapflights users on 4/29. 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.
dom. 5/116:11 amPDX - PNH
2 stops27h 04mChina Eastern
dom. 5/1812:10 amPNH - PDX
2 stops29h 58mChina Eastern
Deal found 4/29$1,061
This Korean Air deal was found by Cheapflights users on 4/28. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/299:12 amPDX - PNH
2 stops22h 58mKorean Air
lun. 6/1611:30 pmPNH - PDX
2 stops31h 40mKorean Air
Deal found 4/28$1,145

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 abril 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

jue. 9/4

10:15 am-8:40 am

1 stop32h 25m

Phnom Penh Pochentong

lun. 10/6

9:35 am-8:45 am

1 stop37h 10m

$856

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

mié. 9/3

2:15 pm-10:55 pm

1 stop18h 40m

Phnom Penh Pochentong

mié. 9/10

11:55 pm-12:30 pm

1 stop26h 35m

$909

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

mié. 9/3

2:15 pm-10:55 pm

1 stop18h 40m

Phnom Penh Pochentong

mié. 9/10

4:40 pm-12:30 pm

2 stops33h 50m

$931

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

mar. 9/2

7:20 am-11:15 pm

2 stops25h 55m

Phnom Penh Pochentong

mié. 10/1

12:10 am-4:59 pm

2 stops30h 49m

$941

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

lun. 9/1

1:40 am-9:50 am

1 stop18h 10m

Phnom Penh Pochentong

jue. 10/2

5:10 pm-7:20 pm

1 stop16h 10m

$976

PortlandPhnom Penh

PDX - PNH

PDXPNH

Portland

mié. 5/21

9:35 pm-11:15 pm

2 stops35h 40m

Phnom Penh Pochentong

lun. 6/2

12:10 am-4:24 pm

2 stops30h 14m

$991

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

mié. 9/3

5:48 pm-12:15 am

2 stops40h 27m

Phnom Penh Pochentong

mar. 9/9

1:15 am-7:15 pm

1 stop32h 00m

$1,031

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

mié. 9/3

5:59 pm-10:10 pm

2 stops38h 11m

Phnom Penh Pochentong

mié. 9/10

11:30 pm-10:40 am

1 stop25h 10m

$1,032

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

mié. 9/10

1:30 am-11:15 am

1 stop19h 45m

Phnom Penh Pochentong

mié. 10/15

12:35 pm-7:30 pm

1 stop20h 55m

$1,058

PortlandPhnom Penh

PDX - PNH

PDXPNH

Portland

dom. 5/11

6:11 am-11:15 pm

2 stops27h 04m

Phnom Penh Pochentong

dom. 5/18

12:10 am-4:08 pm

2 stops29h 58m

$1,061

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 27 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 $1,582). 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 abril 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.

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 abril 30, 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
1,186 reviews

Crew

8.6

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
EVA Air
8.4
Very good
1,186 reviews
EVA Air
8.4
Very good
1,186 reviews

Crew

8.6

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Korean Air
8.4
Very good
1,066 reviews
EVA Air
8.4
Very good
1,186 reviews

Crew

8.6

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
China Airlines
8.3
Very good
732 reviews
EVA Air
8.4
Very good
1,186 reviews

Crew

8.6

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Asiana Airlines
8.2
Very good
442 reviews
EVA Air
8.4
Very good
1,186 reviews

Crew

8.6

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Singapore Airlines
8.1
Very good
1,292 reviews
EVA Air
8.4
Very good
1,186 reviews

Crew

8.6

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop

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 Korean Air. According to our data, you can fly for as low as $672. Users have also found prices from $689 and $708 on XiamenAir and China 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 $1,582). 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 abril 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Philippine AirlinesCheapest$693Average$959FlexibilityNo cancel feeOn-time60%
Korean AirCheapest$756Average$973FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$774Average$981FlexibilityNo cancel feeOn-time76%
Singapore AirlinesCheapest$796Average$1,110FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$877Average$1,004FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$1,011Average$1,257FlexibilityNo cancel feeOn-time74%

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