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Phnom Penh

Cheap flights from Seattle (SEA) to Phnom Penh (PNH)

SEA — PNH
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
1 adult, Economy
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Find 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 March 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

June

Cheapest in

September

Average price

$871
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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Highest demand for flights based on searches. 20% potential increase in price ($275 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in March 2026
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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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
oojoPrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
SmartFaresPrice Accuracy1 starTrust Score*1 star
Trip.comPrice Accuracy1 starTrust 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Phnom Penh flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 March 6, 2026.

The best time to book flights from Seattle to Phnom Penh is 32 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, November is the cheapest month in which you can book a flight from Seattle to Phnom Penh (average of $364). Flying from Seattle to Phnom Penh in July is currently the most expensive (average of $796). 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.

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 March 10, 2026.
Read reviews from past customers who have flown EVA Air,Korean Air, andChina Airlines from Seattle to Phnom Penh. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,370 reviews

Boarding

8.4

Entertainment

8.0

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.6

Reviews

1 / 20
6.0
Good

Jack,Feb 2026

MNL - TPE

Getting a boarding pass and checking baggage in Manila was painful. Two-plus hour long queue to get to the check-in counter. Once there, staff were great. Boarding was a bit chaotic as travelers seemed to ignore the boarding groups. ... Once in the air, EVA and staff were fantastic and the food was pretty good. ... I'd give a higher rating except for the painful boarding process.
EVA Air
8.4
Very good
1,370 reviews
EVA Air
8.4
Very good
1,370 reviews

Boarding

8.4

Entertainment

8.0

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.6

Reviews

1 / 20
6.0
Good

Jack,Feb 2026

MNL - TPE

Getting a boarding pass and checking baggage in Manila was painful. Two-plus hour long queue to get to the check-in counter. Once there, staff were great. Boarding was a bit chaotic as travelers seemed to ignore the boarding groups. ... Once in the air, EVA and staff were fantastic and the food was pretty good. ... I'd give a higher rating except for the painful boarding process.
Korean Air
8.4
Very good
1,202 reviews
EVA Air
8.4
Very good
1,370 reviews

Boarding

8.4

Entertainment

8.0

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.6

Reviews

1 / 20
6.0
Good

Jack,Feb 2026

MNL - TPE

Getting a boarding pass and checking baggage in Manila was painful. Two-plus hour long queue to get to the check-in counter. Once there, staff were great. Boarding was a bit chaotic as travelers seemed to ignore the boarding groups. ... Once in the air, EVA and staff were fantastic and the food was pretty good. ... I'd give a higher rating except for the painful boarding process.
China Airlines
8.3
Very good
811 reviews
EVA Air
8.4
Very good
1,370 reviews

Boarding

8.4

Entertainment

8.0

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.6

Reviews

1 / 20
6.0
Good

Jack,Feb 2026

MNL - TPE

Getting a boarding pass and checking baggage in Manila was painful. Two-plus hour long queue to get to the check-in counter. Once there, staff were great. Boarding was a bit chaotic as travelers seemed to ignore the boarding groups. ... Once in the air, EVA and staff were fantastic and the food was pretty good. ... I'd give a higher rating except for the painful boarding process.
Singapore Airlines
8.2
Very good
1,471 reviews
EVA Air
8.4
Very good
1,370 reviews

Boarding

8.4

Entertainment

8.0

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.6

Reviews

1 / 20
6.0
Good

Jack,Feb 2026

MNL - TPE

Getting a boarding pass and checking baggage in Manila was painful. Two-plus hour long queue to get to the check-in counter. Once there, staff were great. Boarding was a bit chaotic as travelers seemed to ignore the boarding groups. ... Once in the air, EVA and staff were fantastic and the food was pretty good. ... I'd give a higher rating except for the painful boarding process.
Asiana Airlines
8.1
Very good
504 reviews
EVA Air
8.4
Very good
1,370 reviews

Boarding

8.4

Entertainment

8.0

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.6

Reviews

1 / 20
6.0
Good

Jack,Feb 2026

MNL - TPE

Getting a boarding pass and checking baggage in Manila was painful. Two-plus hour long queue to get to the check-in counter. Once there, staff were great. Boarding was a bit chaotic as travelers seemed to ignore the boarding groups. ... Once in the air, EVA and staff were fantastic and the food was pretty good. ... I'd give a higher rating except for the painful boarding process.

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 Philippine Airlines. Our recent data shows that you can find tickets from as low as $672 on this airline. Additional options worth looking into are Singapore Airlines and Asiana Airlines, starting at $702 and $771 round-trip. Philippine Airlines is 37% 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 China Airlines. According to our data, you can fly for as low as $389. Users have also found prices from $397 and $413 on Korean Air and Asiana 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 Taipei City most of the time.

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

    The majority of Taipei City visitors spend their time at Taipei 101, Raohe Street Night Market, and Shilin Night Market. Taipei 101, Raohe Street Night Market, and Shilin Night Market can be accessed by traveling approximately 21.0 mi, 21.6 mi, and 18.3 mi, respectively from Taipei City Taiwan Taoyuan Intl. Travelers in need of a car in Taipei City can rent one for about $72 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 Seoul 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, November is the cheapest month in which you can book a flight from Seattle to Phnom Penh (average of $364). Flying from Seattle to Phnom Penh in July is currently the most expensive (average of $796). 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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Complete your trip

Complete your trip to Phnom Penh by adding a car rental and/or hotel reservation to your travel itinerary.
Phnom Penh car rentals
Phnom Penh Pochentong Airport car rentals

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 March 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
Philippine AirlinesCheapest$672Average$925FlexibilityNo cancel feeOn-time60%
Singapore AirlinesCheapest$702Average$1,122FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$771Average$1,061FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$773Average$1,038FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$964Average$1,385FlexibilityNo cancel feeOn-time74%
China AirlinesCheapest$1,135Average$1,391FlexibilityNo cancel feeOn-time70%

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