$599 Cheap Flights from Perth (PER) to Seattle (SEA)

View $599 flight on Thu, Feb 19, 2026Opens in a new window

Popular airlines from Perth Airport (PER) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Perth to Seattle (PER-SEA)

Prices were available within the past 7 days and start at $599 for one-way flights and $829 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Japan Airlines
Sun, Nov 9 - Tue, Nov 11
PER
Perth
SEA
Seattle
$829 Roundtrip, found 5 days ago
$829
Roundtrip
found 5 days ago
Select Japan Airlines flight, departing Sun, Nov 9 from Perth to Seattle, returning Tue, Nov 11, priced at $829 found 5 days ago
Japan Airlines
Thu, Sep 4 - Wed, Sep 17
PER
Perth
SEA
Seattle
$855 Roundtrip, found 6 days ago
$855
Roundtrip
found 6 days ago
Select Japan Airlines flight, departing Thu, Sep 4 from Perth to Seattle, returning Wed, Sep 17, priced at $855 found 6 days ago
Japan Airlines
Sun, Nov 9 - Mon, Nov 10
PER
Perth
SEA
Seattle
$882 Roundtrip, found 5 days ago
$882
Roundtrip
found 5 days ago
Select Japan Airlines flight, departing Sun, Nov 9 from Perth to Seattle, returning Mon, Nov 10, priced at $882 found 5 days ago
Japan Airlines
Wed, Sep 3 - Sat, Sep 20
PER
Perth
SEA
Seattle
$884 Roundtrip, found 6 hours ago
$884
Roundtrip
found 6 hours ago
Select Japan Airlines flight, departing Wed, Sep 3 from Perth to Seattle, returning Sat, Sep 20, priced at $884 found 6 hours ago
Japan Airlines
Fri, Sep 5 - Sat, Sep 20
PER
Perth
SEA
Seattle
$885 Roundtrip, found 6 hours ago
$885
Roundtrip
found 6 hours ago
Select Japan Airlines flight, departing Fri, Sep 5 from Perth to Seattle, returning Sat, Sep 20, priced at $885 found 6 hours ago
Japan Airlines
Sun, Sep 7 - Thu, Sep 11
PER
Perth
SEA
Seattle
$885 Roundtrip, found 16 hours ago
$885
Roundtrip
found 16 hours ago
Select Japan Airlines flight, departing Sun, Sep 7 from Perth to Seattle, returning Thu, Sep 11, priced at $885 found 16 hours ago
Qantas Airways
Mon, Nov 10 - Tue, Nov 11
PER
Perth
SEA
Seattle
$1,000 Roundtrip, found 5 days ago
$1,000
Roundtrip
found 5 days ago
Select Qantas Airways flight, departing Mon, Nov 10 from Perth to Seattle, returning Tue, Nov 11, priced at $1,000 found 5 days ago
United
Wed, Aug 27 - Sat, Sep 13
PER
Perth
SEA
Seattle
$1,292 Roundtrip, found 6 hours ago
$1,292
Roundtrip
found 6 hours ago
Select United flight, departing Wed, Aug 27 from Perth to Seattle, returning Sat, Sep 13, priced at $1,292 found 6 hours ago
Qatar Airways
Sun, Sep 7 - Thu, Sep 11
PER
Perth
SEA
Seattle
$1,624 Roundtrip, found 16 hours ago
$1,624
Roundtrip
found 16 hours ago
Select Qatar Airways flight, departing Sun, Sep 7 from Perth to Seattle, returning Thu, Sep 11, priced at $1,624 found 16 hours ago
Emirates
Sun, Sep 7 - Thu, Sep 11
PER
Perth
SEA
Seattle
$1,824 Roundtrip, found 16 hours ago
$1,824
Roundtrip
found 16 hours ago
Select Emirates flight, departing Sun, Sep 7 from Perth to Seattle, returning Thu, Sep 11, priced at $1,824 found 16 hours ago

Find the cheapest month to fly from Perth (PER) to Seattle (SEA)

August is typically the cheapest month to fly

From $999 - $1,967 per traveler.

Graph displaying average flight prices per month

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $1,292
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $1,292
Flights from Perth (PER) to Seattle (SEA)
Origin airport
Perth
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Air Canada, Air New Zealand, American Airlines, Cathay Pacific, Emirates, Japan Airlines, Qantas Airways, Qatar Airways, Singapore Airlines
Roundtrip price
$829
Distance
9240 mi

Perth to Seattle Flights

The cheapest times to fly from Perth to Seattle

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 Perth to Seattle are during the month of November. You can find some of the cheapest flights from Perth to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Perth to Seattle

Sunday is one of the best days to book for cheap flights from Perth to Seattle: 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 Perth to Seattle

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 Perth to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $599 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 Perth to Seattle 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 Perth to Seattle 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.

 

Frequently asked questions

How much does a flight from Perth Airport (PER) to Seattle - Tacoma Intl. Airport (SEA) cost?
Get a cheap one-way flight from $599 or cheap return flight from $829 from Perth Airport (PER) to Seattle - Tacoma Intl. Airport (SEA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Perth Airport (PER) to Seattle - Tacoma Intl. Airport (SEA)?
The cheapest month to fly from PER to SEA is November, when there's less demand. Off-peak months are often when airlines offer better prices between these airports.
What is the cheapest airline that flies from Perth Airport (PER) to Seattle - Tacoma Intl. Airport (SEA)?
To find the cheapest airline flying from PER to SEA, use Expedia's filter tool. Customize 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 list the most affordable options first.
How many flights per day from Perth Airport (PER) to Seattle - Tacoma Intl. Airport (SEA)?
There aren't any daily direct flights available from Perth Airport (PER) to Seattle - Tacoma Intl. Airport (SEA). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be soaring above the clouds before you know it.
What day of the week has the most flights from PER to SEA?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Perth Airport (PER) to Seattle - Tacoma Intl. Airport (SEA)?
To touch down at Seattle - Tacoma Intl. Airport (SEA) without delays, select a flight that leaves Perth Airport (PER) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**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 Perth Airport (PER) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Last-minute fares from PER to SEA are generally more expensive. To secure the lowest rates, start searching for flights well ahead of time. That said, if you can play around with your travel dates, it's possible to land a cheap fare right before your journey.
Is it cheaper to book a PER to SEA flight and hotel package?
You'll typically save money by securing a PER to SEA flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. After selecting your ideal flights and accommodations, consider adding extras such as tours, activities and car rentals.
Can I cancel or change the date of my flight from Perth Airport (PER) to Seattle - Tacoma Intl. Airport (SEA)?
It's usually possible to reschedule or cancel your PER to SEA flight. However, for bookings made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.