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Phnom Penh

$773+ Cheap flights from Seattle (SEA) 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PNH
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
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 August 14, 2025.

Round-trip from

$773
(FlightHub)

Popular in

December

Cheapest in

January

Average price

$1,109
From Seattle/Tacoma Intl to Phnom Penh Pochentong
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($52 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 August 14, 2025.

This FlightHub deal was found by Cheapflights users on 8/14. 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 10/62:15 pmSEA - PNH
1 stop18h 40mAsiana Airlines
Wed 10/2211:55 pmPNH - SEA
1 stop26h 35mAsiana Airlines
Deal found 8/14$773
This oojo deal was found by Cheapflights users on 8/14. 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 10/309:45 amSEA - PNH
1 stop38h 00mSingapore Airlines
Wed 11/199:35 amPNH - SEA
1 stop36h 35mSingapore Airlines
Deal found 8/14$777
This oojo deal was found by Cheapflights users on 8/12. 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.
Sun 11/212:10 amSEA - PNH
1 stop31h 45mAsiana Airlines
Fri 11/1411:55 pmPNH - SEA
1 stop29h 00mAsiana Airlines
Deal found 8/12$786
This oojo deal was found by Cheapflights users on 8/12. 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 9/182:15 pmSEA - PNH
1 stop18h 40mAsiana Airlines
Fri 10/311:55 pmPNH - SEA
1 stop26h 35mAsiana Airlines
Deal found 8/12$793
This FlightHub deal was found by Cheapflights users on 8/12. 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 8/272:30 pmSEA - PNH
1 stop18h 25mAsiana Airlines
Sun 8/3111:55 pmPNH - SEA
1 stop26h 35mAsiana Airlines
Deal found 8/12$795
This Asiana Airlines deal was found by Cheapflights users on 8/12. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/242:30 pmSEA - PNH
1 stop18h 25mAsiana Airlines
Fri 8/2911:55 pmPNH - SEA
1 stop26h 50mAsiana Airlines
Deal found 8/12$803
This KAYAK deal was found by Cheapflights users on 8/14. 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 8/277:10 amSEA - PNH
2 stops26h 05mChina Eastern
Sat 8/3012:10 amPNH - SEA
2 stops30h 41mChina Eastern
Deal found 8/14$807
This Asiana Airlines deal was found by Cheapflights users on 8/13. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1512:10 amSEA - PNH
1 stop31h 45mAsiana Airlines
Mon 12/111:55 pmPNH - SEA
1 stop29h 00mAsiana Airlines
Deal found 8/13$814
This oojo deal was found by Cheapflights users on 8/12. 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 10/2410:15 amSEA - PNH
1 stop32h 20mSingapore Airlines
Mon 11/109:35 amPNH - SEA
1 stop36h 35mSingapore Airlines
Deal found 8/12$818
This Korean Air deal was found by Cheapflights users on 8/12. 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.
Wed 8/135:40 pmSEA - PNH
2 stops38h 30mKorean Air
Tue 11/1111:45 pmPNH - SEA
1 stop24h 15mKorean Air
Deal found 8/12$820
This Expedia deal was found by Cheapflights users on 8/14. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/72:15 pmSEA - PNH
1 stop18h 40mAsiana Airlines
Wed 10/2211:55 pmPNH - SEA
1 stop26h 35mAsiana Airlines
Deal found 8/14$825

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 August 14, 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

Mon 10/6

2:15 pm-10:55 pm

1 stop18h 40m

Phnom Penh Pochentong

Wed 10/22

11:55 pm-12:30 pm

1 stop26h 35m

$773

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Thu 10/30

9:45 am-1:45 pm

1 stop38h 00m

Phnom Penh Pochentong

Wed 11/19

2:40 pm-7:10 am

1 stop31h 30m

$777

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Tue 11/18

8:45 am-1:45 pm

1 stop38h 00m

Phnom Penh Pochentong

Wed 12/3

9:35 am-7:10 am

1 stop36h 35m

$777

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Tue 11/4

8:45 am-1:45 pm

1 stop38h 00m

Phnom Penh Pochentong

Mon 11/24

7:40 pm-7:10 am

1 stop26h 30m

$777

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sun 11/2

12:10 am-10:55 pm

1 stop31h 45m

Phnom Penh Pochentong

Fri 11/14

11:55 pm-1:55 pm

1 stop29h 00m

$786

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sun 1/4

12:10 am-10:55 pm

1 stop31h 45m

Phnom Penh Pochentong

Fri 1/16

11:55 pm-1:55 pm

1 stop29h 00m

$786

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Tue 11/4

12:10 am-10:55 pm

1 stop31h 45m

Phnom Penh Pochentong

Fri 11/28

11:55 pm-1:55 pm

1 stop29h 00m

$786

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Mon 1/5

12:10 am-10:55 pm

1 stop31h 45m

Phnom Penh Pochentong

Fri 1/16

11:55 pm-1:55 pm

1 stop29h 00m

$786

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Mon 10/13

8:42 am-5:35 pm

3 stops42h 53m

$2,657

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sun 10/12

1:30 am-11:15 am

1 stop19h 45m

$3,119

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Showing 1-10 of 14 results
1
2

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 August 8, 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 $986). Flying from Seattle to Phnom Penh in June is currently the most expensive (average of $1,546). 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 August 14, 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.

How much does it cost to fly round-trip from Seattle to Phnom Penh?

What’s the top layover airport for flights from Seattle to Phnom Penh?

Share of 1-stop round-trip flights from Seattle to Phnom Penh chosen by Cheapflights users in the past 12 months, using the same layover each way.

Taipei City (TPE) – chosen by Cheapflights users on 68% of 1-stop itineraries from Seattle to Phnom Penh on Cheapflights.

What’s the cheapest layover airport for flights from Seattle to Phnom Penh?

Average round-trip fare for 1-stop flights from Seattle to Phnom Penh, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Incheon (ICN) is the most affordable 1-stop option, with an average round-trip price of $1,025.

What’s the fastest layover option from Seattle to Phnom Penh?

Shortest average travel time for 1-stop one-way flights from Seattle to Phnom Penh, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Incheon (ICN) have the shortest average one-way travel time for 1-stop routes: 18h 37m.

Which airport typically offers the quickest layover for flights from Seattle to Phnom Penh?

Average layover duration for 1-stop one-way flights from Seattle to Phnom Penh, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Taipei City (TPE) offer the fastest connection on this route, with an average layover time of 4h 50m.

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 August 14, 2025.
Read reviews from past customers who have flown EVA Air, Korean Air, and China 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
1,233 reviews

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Food

8.1

Overall

8.4

Crew

8.6

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
EVA Air
8.4
Very good
1,233 reviews
EVA Air
8.4
Very good
1,233 reviews

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Food

8.1

Overall

8.4

Crew

8.6

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
Korean Air
8.4
Very good
1,131 reviews
EVA Air
8.4
Very good
1,233 reviews

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Food

8.1

Overall

8.4

Crew

8.6

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
China Airlines
8.3
Very good
762 reviews
EVA Air
8.4
Very good
1,233 reviews

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Food

8.1

Overall

8.4

Crew

8.6

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
Asiana Airlines
8.2
Very good
473 reviews
EVA Air
8.4
Very good
1,233 reviews

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Food

8.1

Overall

8.4

Crew

8.6

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
Singapore Airlines
8.1
Very good
1,346 reviews
EVA Air
8.4
Very good
1,233 reviews

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Food

8.1

Overall

8.4

Crew

8.6

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak

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 $693 on this airline. Additional options worth looking into are Singapore Airlines and Korean Air, starting at $702 and $756 round-trip. Philippine Airlines is 37% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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, Lotte World, and Bukchon Hanok Village. Dongdaemun Market, Lotte World, and Bukchon Hanok Village can be accessed by traveling approximately 31.6 mi, 35.7 mi, and 30.6 mi, respectively from Incheon Intl. Travelers in need of a car in Seoul can rent one for about $75 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 $986). Flying from Seattle to Phnom Penh in June is currently the most expensive (average of $1,546). 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Philippine AirlinesCheapest$693Average$925FlexibilityNo cancel feeOn-time60%
Singapore AirlinesCheapest$702Average$1,058FlexibilityNo cancel feeOn-time81%
Korean AirCheapest$756Average$933FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$790Average$1,049FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$951Average$1,351FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$985Average$1,329FlexibilityNo cancel feeOn-time74%

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