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Phnom Penh

$402+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PNH
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
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 July 1, 2025.

Round-trip from

$1,056
(Korean Air)

One-way from

$462
(oojo)

Popular in

December

Cheapest in

January

Average price

$1,355
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. 3% potential increase in price ($40 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 1, 2025.

This Korean Air deal was found by Cheapflights users on 7/1. 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.
Thu 7/245:30 pmSEA - PNH
2 stops38h 40mKorean Air
Thu 8/1411:30 pmPNH - SEA
2 stops36h 42mKorean Air
Deal found 7/1$1,056
This Gotogate deal was found by Cheapflights users on 7/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/171:15 amSEA - PNH
2 stops27h 20mMultiple Airlines
Sat 8/301:15 amPNH - SEA
1 stop32h 00mMultiple Airlines
Deal found 7/1$1,063
This oojo deal was found by Cheapflights users on 6/30. 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 9/212:30 amSEA - PNH
1 stop20h 45mEVA Air
Wed 9/1012:35 pmPNH - SEA
2 stops23h 01mEVA Air
Deal found 6/30$1,107
This oojo deal was found by Cheapflights users on 6/30. 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.
Mon 7/211:40 amSEA - PNH
1 stop18h 10mChina Airlines
Mon 8/185:10 pmPNH - SEA
1 stop16h 35mChina Airlines
Deal found 6/30$1,158
This oojo deal was found by Cheapflights users on 6/30. 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 8/1311:44 amSEA - PNH
2 stops46h 31mPhilippine Airlines
Tue 11/111:15 amPNH - SEA
1 stop33h 20mPhilippine Airlines
Deal found 6/30$1,169

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 July 1, 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 7/24

5:30 pm-10:10 pm

2 stops38h 40m

Phnom Penh Pochentong

Thu 8/14

11:30 pm-10:12 pm

2 stops36h 42m

$1,056

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sun 8/17

1:15 am-6:35 pm

2 stops27h 20m

Phnom Penh Pochentong

Sat 8/30

1:15 am-7:15 pm

1 stop32h 00m

$1,063

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Tue 9/2

12:30 am-11:15 am

1 stop20h 45m

Phnom Penh Pochentong

Wed 9/10

12:35 pm-9:36 pm

2 stops23h 01m

$1,107

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Mon 7/21

1:40 am-9:50 am

1 stop18h 10m

Phnom Penh Pochentong

Mon 8/18

5:10 pm-7:45 pm

1 stop16h 35m

$1,158

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Wed 8/13

11:44 am-12:15 am

2 stops46h 31m

Phnom Penh Pochentong

Tue 11/11

1:15 am-7:35 pm

1 stop33h 20m

$1,169

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Mon 8/18

1:20 pm-10:10 pm

1 stop18h 50m

$402

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Sun 8/17

1:40 am-7:40 pm

2 stops28h 00m

$454

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Mon 11/10

12:10 am-10:55 pm

1 stop31h 45m

$469

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Fri 9/26

1:30 am-11:15 am

1 stop19h 45m

$654

SeattlePhnom Penh

SEA - PNH

SEAPNH

Seattle/Tacoma Intl

Tue 11/11

8:00 am-8:35 am

3 stops33h 35m

$904

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 12 results
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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 June 27, 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 $989). Flying from Seattle to Phnom Penh in June is currently the most expensive (average of $1,555). 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 July 1, 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.

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 July 1, 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
1,212 reviews

Comfort

8.3

Crew

8.6

Entertainment

8.0

Food

8.1

Overall

8.4

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
EVA Air
8.4
Very good
1,212 reviews
EVA Air
8.4
Very good
1,212 reviews

Comfort

8.3

Crew

8.6

Entertainment

8.0

Food

8.1

Overall

8.4

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Korean Air
8.4
Very good
1,101 reviews
EVA Air
8.4
Very good
1,212 reviews

Comfort

8.3

Crew

8.6

Entertainment

8.0

Food

8.1

Overall

8.4

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
China Airlines
8.3
Very good
747 reviews
EVA Air
8.4
Very good
1,212 reviews

Comfort

8.3

Crew

8.6

Entertainment

8.0

Food

8.1

Overall

8.4

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Qatar Airways
7.4
Good
3,593 reviews
EVA Air
8.4
Very good
1,212 reviews

Comfort

8.3

Crew

8.6

Entertainment

8.0

Food

8.1

Overall

8.4

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Philippine Airlines
7.2
Good
884 reviews
EVA Air
8.4
Very good
1,212 reviews

Comfort

8.3

Crew

8.6

Entertainment

8.0

Food

8.1

Overall

8.4

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

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 Korean Air. Our recent data shows that you can find tickets from as low as $1,056 on this airline. Additional options worth looking into are EVA Air and China Airlines, starting at $1,107 and $1,158 round-trip. Korean Air is 6% 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 $462. Users have also found prices from $654 and $995 on EVA Air and Qatar Airways, 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 Lotte World. Dongdaemun Market, Bukchon Hanok Village, and Lotte World can be accessed by traveling approximately 31.6 mi, 30.6 mi, and 35.7 mi, respectively from Incheon Intl. Travelers in need of a car in Seoul can rent one for about $55 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 $989). Flying from Seattle to Phnom Penh in June is currently the most expensive (average of $1,555). 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 July 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Philippine AirlinesCheapest$693Average$925FlexibilityNo cancel feeOn-time60%
Korean AirCheapest$756Average$972FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$789Average$1,053FlexibilityNo cancel feeOn-time76%
Singapore AirlinesCheapest$806Average$1,168FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$943Average$1,350FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$1,000Average$1,292FlexibilityNo cancel feeOn-time74%

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