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

Airfare is above average for this route at the moment. Seattle to Phnom Penh flights typically cost between $774 and $968 in July. The cheapest round-trip price found within the last 3 days was $2,650 on British Airways (Jul 13-Jul 28).

Question 1

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

Accepted Answer

Incheon (ICN) – chosen by Cheapflights users on 45% of 1-stop itineraries from Seattle to Phnom Penh on Cheapflights.

Question 2

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

Accepted Answer

Airfare is above average for this route at the moment.Seattle to Phnom Penh flights typically cost between $774 and $968 in July.
The cheapest round-trip price found within the last 3 days was $2,650 on British Airways (Jul 13-Jul 28).

Question 3

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

Accepted Answer

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

Question 4

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

Accepted Answer

Flights via Taipei City (TPE) offer the fastest connection on this route, with an average layover time of 4h 26m.

Question 5

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

Accepted Answer

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

Question 6

How long is the flight from Seattle to Phnom Penh?

Accepted Answer

Airlines like British Airways fly from Seattle to Phnom Penh in about 47h 40m. The time it takes to get you to your destination can typically vary by up to . The distance from Seattle to Phnom Penh is about 7432 mi.

Question 7

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

Accepted Answer

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 35% cheaper than the average price of flights available within the next 90 days to this destination.

Question 8

What are the cheapest airlines to fly from Seattle to Phnom Penh one-way?

Accepted Answer

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.

Question 9

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

Accepted Answer

The best time to book flights from Seattle to Phnom Penh is 30 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.

Question 10

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

Accepted Answer

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 $928). 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.

Question 11

E

Accepted Answer

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.

Question 12

E

Accepted Answer

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).

Question 13

What are the most popular airlines that fly from Seattle to Phnom Penh?

Accepted Answer

Consider China Airlines, Asiana Airlines or Korean Air when booking your flight. These represent the most popular airlines when flying from Seattle to Phnom Penh.

Question 14

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

Accepted Answer

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

Question 15

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

Accepted Answer

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

Question 16

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

Accepted Answer

The majority of Taipei City visitors spend their time at Taipei 101, Shilin Night Market, and Raohe Street Night Market. Taipei 101, Shilin Night Market, and Raohe Street Night Market can be accessed by traveling approximately 21.0 mi, 18.3 mi, and 21.6 mi, respectively from Taipei City Taiwan Taoyuan Intl. Travelers in need of a car in Taipei City can rent one for about $80 per day.

Question 17

What is the cheapest time of day to fly from SEA to PNH?

Accepted Answer

When flying from Seattle to Phnom Penh, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Question 18

E

Accepted Answer

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.

Question 19

E

Accepted Answer

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.

Question 20

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

Accepted Answer

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

Question 21

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

Accepted Answer

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.

Question 22

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

Accepted Answer

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.

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Popular in	June
Cheapest in	March
Average price	$925

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy2 stars	Trust Score*2 stars
Ovago	Price Accuracy2 stars	Trust Score*3 stars
Cheapfaremart	Price Accuracy-	Trust Score*1 star
Trip.com	Price Accuracy1 star	Trust Score*3 stars
oojo	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Justfly.com	Price Accuracy3 stars	Trust Score*3 stars
SmartFares	Price Accuracy1 star	Trust Score*1 star

Airline	Cheapest	Average	Flexibility	On-time
Philippine Airlines	Cheapest$693	Average$925	FlexibilityNo cancel fee	On-time60%
Singapore Airlines	Cheapest$702	Average$983	FlexibilityNo cancel fee	On-time81%
Korean Air	Cheapest$765	Average$1,077	FlexibilityNo cancel fee	On-time81%
Asiana Airlines	Cheapest$773	Average$1,063	FlexibilityNo cancel fee	On-time76%
EVA Air	Cheapest$895	Average$1,385	FlexibilityNo cancel fee	On-time74%
China Airlines	Cheapest$1,002	Average$1,388	FlexibilityNo cancel fee	On-time70%

$2,650+ 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 7/13. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from Seattle to Phnom Penh

Cheapest flights from Seattle to Phnom PenhExplore 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 February 18, 2026.

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 February 18, 2026.

Best flights from Seattle to Phnom PenhDiscover carefully curated flight deals from Seattle to Phnom Penh that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 18, 2026.

Discover carefully curated flight deals from Seattle to Phnom Penh that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 18, 2026.

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Best time to book a flight from Seattle to Phnom Penh

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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?

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

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?

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

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

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

Reviews of airlines servicing Phnom Penh

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.

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.

How long is the flight from Seattle to Phnom Penh?

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

What are the cheapest airlines to fly from Seattle to Phnom Penh one-way?

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

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

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

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

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

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

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

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Alternative routes for Seattle to Phnom Penh

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Seattle and Phnom Penh flights

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Other flights to Phnom Penh

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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 February 18, 2026.

Best flights from Seattle to Phnom Penh
Discover carefully curated flight deals from Seattle to Phnom Penh that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 18, 2026.