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Phnom Penh

$524+ Cheap flights from Seattle (SEA) 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
Mon 5/5
Mon 5/12
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Phnom Penh Pochentong are usually found in January or March, booked 14 days in advance, depart on a Tuesday or Saturday and return on a Wednesday

Cheap flight deals from Seattle to Phnom Penh

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) 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 April 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 Seattle/Tacoma Intl to Phnom Penh Pochentong
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One-way flight from Seattle/Tacoma Intl 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 Seattle to Phnom Penh

Cheapest flights from Seattle to Phnom Penh
Explore the most affordable flight options available from Seattle to Phnom Penh. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 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.
Thu 11/278:45 amSEA - PNH
1 stop32h 50mSingapore Airlines
Thu 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.
Sun 11/3011:55 pmSEA - PNH
1 stop33h 20mPhilippine Airlines
Tue 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.
Wed 10/292:00 pmSEA - PNH
1 stop18h 55mAsiana Airlines
Thu 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.
Wed 9/32:15 pmSEA - PNH
1 stop18h 40mMultiple Airlines
Wed 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.
Tue 9/27:20 amSEA - PNH
2 stops25h 55mChina Eastern
Wed 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.
Tue 10/281:10 amSEA - PNH
1 stop25h 05mChina Airlines
Thu 11/275:20 pmPNH - SEA
1 stop15h 55mChina Airlines
Deal found 4/29$950
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.
Thu 5/112:50 pmSEA - PNH
1 stop19h 20mKorean Air
Wed 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.
Wed 9/101:30 amSEA - PNH
1 stop19h 45mEVA Air
Wed 10/1512:35 pmPNH - SEA
1 stop20h 55mEVA Air
Deal found 4/29$1,058

Cheapflights Fare Finder

Customize your flight search to find flights from Seattle 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 30, 2025.
Use the filters below to find and compare flights from Seattle to Phnom Penh that are best for you.

Fly from

Seattle

Fly to

Phnom Penh

Route

Depart

Return

Price

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Thu 9/4

10:15 am-8:40 am

1 stop32h 25m

Phnom Penh Pochentong

Mon 10/6

9:35 am-8:45 am

1 stop37h 10m

$856

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

$909

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

4:40 pm-12:30 pm

2 stops33h 50m

$931

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Tue 9/2

7:20 am-11:15 pm

2 stops25h 55m

Phnom Penh Pochentong

Wed 10/1

12:10 am-4:59 pm

2 stops30h 49m

$941

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Mon 9/1

1:40 am-9:50 am

1 stop18h 10m

Phnom Penh Pochentong

Thu 10/2

5:10 pm-7:20 pm

1 stop16h 10m

$976

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 9/3

5:48 pm-12:15 am

2 stops40h 27m

Phnom Penh Pochentong

Tue 9/9

1:15 am-7:15 pm

1 stop32h 00m

$1,031

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 9/3

5:59 pm-10:10 pm

2 stops38h 11m

Phnom Penh Pochentong

Wed 9/10

11:30 pm-10:40 am

1 stop25h 10m

$1,032

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 9/10

1:30 am-11:15 am

1 stop19h 45m

Phnom Penh Pochentong

Wed 10/15

12:35 pm-7:30 pm

1 stop20h 55m

$1,058

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Mon 7/21

7:10 pm-8:35 am

2 stops47h 25m

Phnom Penh Pochentong

Mon 7/28

7:25 pm-10:35 am

2 stops29h 10m

$1,196

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Thu 5/15

7:00 am-4:15 pm

3 stops43h 15m

Phnom Penh Pochentong

Wed 5/28

5:40 pm-12:45 pm

2 stops33h 05m

$1,342

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 17 results
1
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Compare providers for flights from Seattle to Phnom Penh

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Phnom Penh in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
SmartFaresPrice Accuracy1 starTrust Score*1 star
Trip.comPrice Accuracy1 starTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Phnom Penh flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Seattle-Phnom Penh flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Seattle-Phnom Penh flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Phnom Penh flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Phnom Penh flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Phnom Penh

Have a flexible travel schedule? Discover the best time to fly to Phnom Penh from Seattle 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 Seattle to Phnom Penh

How far ahead should I book a flight from Seattle to Phnom Penh?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Phnom Penh. Price data was last updated on April 25, 2025.

The best time to book flights from Seattle to Phnom Penh is 14 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Seattle to Phnom Penh?

Currently, March is the cheapest month in which you can book a flight from Seattle to Phnom Penh (average of $991). Flying from Seattle 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 SEA to PNH?

Find hourly flight availability from Seattle 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 30, 2025.

One of the essential ways to save on airfare from Seattle to Phnom Penh is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 20% on airfare.

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 30, 2025.
EVA Air
8.4
Very good
1,186 reviews

Boarding

8.4

Crew

8.6

Entertainment

8.0

Overall

8.4

Food

8.1

Comfort

8.3

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

Boarding

8.4

Crew

8.6

Entertainment

8.0

Overall

8.4

Food

8.1

Comfort

8.3

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

Boarding

8.4

Crew

8.6

Entertainment

8.0

Overall

8.4

Food

8.1

Comfort

8.3

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

Boarding

8.4

Crew

8.6

Entertainment

8.0

Overall

8.4

Food

8.1

Comfort

8.3

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

Boarding

8.4

Crew

8.6

Entertainment

8.0

Overall

8.4

Food

8.1

Comfort

8.3

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

Boarding

8.4

Crew

8.6

Entertainment

8.0

Overall

8.4

Food

8.1

Comfort

8.3

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 Seattle 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 are the cheapest airlines flying from Seattle to Phnom Penh round-trip?

    Our cheapest airline available from Seattle to Phnom Penh is China Eastern. Our recent data shows that you can find tickets from as low as $960 on this airline. Additional options worth looking into are Asiana Airlines and Korean Air, starting at $1,072 and $1,129 round-trip. China Eastern is 16% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Seattle 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.

  • Where are the most common layover locations when flying from Seattle to Phnom Penh?

    Seattle to Phnom Penh flights have a layover in Seoul most of the time.

  • What are some popular things to do or see while on a layover in Seoul?

    The majority of Seoul visitors spend their time at Dongdaemun Market, Bukchon Hanok Village, and Myeongdong Cathedral. Dongdaemun Market, Bukchon Hanok Village, and Myeongdong Cathedral can be accessed by traveling approximately 31.6 mi, 30.6 mi, and 30.4 mi, respectively from Incheon Intl. Travelers in need of a car in Seoul can rent one for about $53 per day.

  • Where are the least popular layover locations for Seattle to Phnom Penh flights?

    Flights departing from Seattle and landing in Phnom Penh layover in Taipei City least frequently.

  • Can I find deals for flights from Seattle to Phnom Penh that include hotel bookings?

    Yes. In addition to deals on Seattle to Phnom Penh flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Phnom Penh?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Phnom Penh.

  • Can I find deals for business class flights from Seattle to Phnom Penh?

    Yes. Cheapflights offers flight deals from Seattle 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 Seattle to Phnom Penh?

    Currently, March is the cheapest month in which you can book a flight from Seattle to Phnom Penh (average of $991). Flying from Seattle 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 Seattle to Phnom Penh

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Phnom Penh flights
Spokane to Phnom Penh flights

Top 6 airlines flying from Seattle to Phnom Penh

Discover the top 6 airlines that operate flights from Seattle 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 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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