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

Popular airlines from Seattle-Tacoma International Airport (SEA) to Phnom Penh Intl. Airport (PNH)

    notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
    deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
    trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Seattle to Phnom Penh (SEA-PNH)

Prices were available within the past 7 days and start at for one-way flights and $1,988 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sun, Nov 16 - Fri, Dec 5
SEA
Seattle
PNH
Phnom Penh
$1,988 Roundtrip, found 5 days ago
$1,988
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sun, Nov 16 from Seattle to Phnom Penh, returning Fri, Dec 5, priced at $1,988 found 5 days ago
American Airlines
Sun, Nov 16 - Tue, Dec 2
SEA
Seattle
PNH
Phnom Penh
$2,000 Roundtrip, found 5 days ago
$2,000
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sun, Nov 16 from Seattle to Phnom Penh, returning Tue, Dec 2, priced at $2,000 found 5 days ago
American Airlines
Mon, Nov 17 - Fri, Dec 5
SEA
Seattle
PNH
Phnom Penh
$2,002 Roundtrip, found 5 days ago
$2,002
Roundtrip
found 5 days ago
Select American Airlines flight, departing Mon, Nov 17 from Seattle to Phnom Penh, returning Fri, Dec 5, priced at $2,002 found 5 days ago
American Airlines
Mon, Nov 17 - Tue, Dec 2
SEA
Seattle
PNH
Phnom Penh
$2,013 Roundtrip, found 5 days ago
$2,013
Roundtrip
found 5 days ago
Select American Airlines flight, departing Mon, Nov 17 from Seattle to Phnom Penh, returning Tue, Dec 2, priced at $2,013 found 5 days ago
Virgin Atlantic
Tue, Nov 18 - Fri, Dec 5
SEA
Seattle
PNH
Phnom Penh
$2,802 Roundtrip, found 5 days ago
$2,802
Roundtrip
found 5 days ago
Select Virgin Atlantic flight, departing Tue, Nov 18 from Seattle to Phnom Penh, returning Fri, Dec 5, priced at $2,802 found 5 days ago
Virgin Atlantic
Tue, Nov 18 - Tue, Dec 2
SEA
Seattle
PNH
Phnom Penh
$2,813 Roundtrip, found 5 days ago
$2,813
Roundtrip
found 5 days ago
Select Virgin Atlantic flight, departing Tue, Nov 18 from Seattle to Phnom Penh, returning Tue, Dec 2, priced at $2,813 found 5 days ago
Virgin Atlantic
Sat, Nov 15 - Fri, Dec 5
SEA
Seattle
PNH
Phnom Penh
$2,869 Roundtrip, found 5 days ago
$2,869
Roundtrip
found 5 days ago
Select Virgin Atlantic flight, departing Sat, Nov 15 from Seattle to Phnom Penh, returning Fri, Dec 5, priced at $2,869 found 5 days ago
Virgin Atlantic
Sat, Nov 15 - Tue, Dec 2
SEA
Seattle
PNH
Phnom Penh
$2,880 Roundtrip, found 5 days ago
$2,880
Roundtrip
found 5 days ago
Select Virgin Atlantic flight, departing Sat, Nov 15 from Seattle to Phnom Penh, returning Tue, Dec 2, priced at $2,880 found 5 days ago

Find the cheapest month to fly from Seattle (SEA) to Phnom Penh (PNH)

September is typically the cheapest month to fly

From $720 - $1,249 per traveler.

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Phnom Penh Intl. Airport (PNH) cost?
Grab a cheap one-way flight or cheap return flight from $1,988 from Seattle - Tacoma Intl. Airport (SEA) to Phnom Penh Intl. Airport (PNH) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Phnom Penh Intl. Airport (PNH)?
The cheapest month to fly from SEA to PNH is November, when there's less demand. Off-peak season is usually when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Phnom Penh Intl. Airport (PNH)?
To find the cheapest airline that'll fly you from SEA to PNH, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Phnom Penh Intl. Airport (PNH)?
You'll need to book a flight with a layover when traveling from Seattle - Tacoma Intl. Airport (SEA) to Phnom Penh Intl. Airport (PNH). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to discover the best option for your trip.
What day of the week has the most flights from SEA to PNH?
Typically you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can change based on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Phnom Penh Intl. Airport (PNH)?
Book a flight from Seattle - Tacoma Intl. Airport (SEA) to Phnom Penh Intl. Airport (PNH) that takes off before 3 PM to reduce the risk of delays and cancellations. Departures after this time are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Phnom Penh Intl. Airport (PNH) last-minute?
Booking your ticket from SEA to PNH right before your trip is usually more expensive. However, if there's some wiggle room with your departure dates and times, you could grab a cheap last-minute fare.
Is it cheaper to book a SEA to PNH flight and hotel package?
You can save money by securing a SEA to PNH flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. Once you've chosen your ideal accommodations and flights, consider other add-ons like car rentals, activities and tours.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Phnom Penh Intl. Airport (PNH)?
Typically, you can modify or cancel your SEA to PNH flight. However, additional charges may apply, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline's guidelines and fees on flight changes, or if you'd like further details, head to our Customer Service portal.

Travel information

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Phnom Penh Intl.
Roundtrip price
$1,988
Distance
7437 mi

Book with confidence

Book with confidence

Seattle to Phnom Penh Flights

The cheapest times to fly from Seattle to Phnom Penh

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Phnom Penh are during the month of November. You can find some of the cheapest flights from Seattle to Phnom Penh with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Phnom Penh

Sunday is one of the best days to book for cheap flights from Seattle to Phnom Penh: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to Phnom Penh

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Phnom Penh in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Phnom Penh flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Phnom Penh airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Seattle to Phnom Penh Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to One Key members.