$572 Cheap Flights from Seattle (SEA) to Perth (PER)

View $572 flight on Sat, Aug 23, 2025Opens in a new window

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

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Cheap Flights from Seattle to Perth (SEA-PER)

Prices were available within the past 7 days and start at $572 for one-way flights and $1,073 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Philippine Airlines
Fri, Mar 13 - Thu, Mar 26
SEA
Seattle
PER
Perth
$1,073 Roundtrip, found 6 days ago
$1,073
Roundtrip
found 6 days ago
Select Philippine Airlines flight, departing Fri, Mar 13 from Seattle to Perth, returning Thu, Mar 26, priced at $1,073 found 6 days ago
Air Canada
Wed, Aug 13 - Sun, Aug 17
SEA
Seattle
PER
Perth
$1,167 Roundtrip, found 1 day ago
$1,167
Roundtrip
found 1 day ago
Select Air Canada flight, departing Wed, Aug 13 from Seattle to Perth, returning Sun, Aug 17, priced at $1,167 found 1 day ago
Air Canada
Wed, Aug 13 - Tue, Aug 19
SEA
Seattle
PER
Perth
$1,170 Roundtrip, found 10 hours ago
$1,170
Roundtrip
found 10 hours ago
Select Air Canada flight, departing Wed, Aug 13 from Seattle to Perth, returning Tue, Aug 19, priced at $1,170 found 10 hours ago
Philippine Airlines
Wed, Nov 5 - Thu, Nov 27
SEA
Seattle
PER
Perth
$1,184 Roundtrip, found 5 days ago
$1,184
Roundtrip
found 5 days ago
Select Philippine Airlines flight, departing Wed, Nov 5 from Seattle to Perth, returning Thu, Nov 27, priced at $1,184 found 5 days ago
Air Canada
Sat, Aug 23 - Thu, Oct 30
SEA
Seattle
PER
Perth
$1,187 Roundtrip, found 2 days ago
$1,187
Roundtrip
found 2 days ago
Select Air Canada flight, departing Sat, Aug 23 from Seattle to Perth, returning Thu, Oct 30, priced at $1,187 found 2 days ago
Philippine Airlines
Wed, Sep 17 - Mon, Oct 27
SEA
Seattle
PER
Perth
$1,190 Roundtrip, found 5 days ago
$1,190
Roundtrip
found 5 days ago
Select Philippine Airlines flight, departing Wed, Sep 17 from Seattle to Perth, returning Mon, Oct 27, priced at $1,190 found 5 days ago
Air Canada
Wed, Aug 20 - Fri, Oct 31
SEA
Seattle
PER
Perth
$1,191 Roundtrip, found 2 days ago
$1,191
Roundtrip
found 2 days ago
Select Air Canada flight, departing Wed, Aug 20 from Seattle to Perth, returning Fri, Oct 31, priced at $1,191 found 2 days ago
Qantas Airways
Fri, Feb 27 - Sat, Mar 14
SEA
Seattle
PER
Perth
$1,261 Roundtrip, found 3 hours ago
$1,261
Roundtrip
found 3 hours ago
Select Qantas Airways flight, departing Fri, Feb 27 from Seattle to Perth, returning Sat, Mar 14, priced at $1,261 found 3 hours ago
Singapore Airlines
Wed, Oct 29 - Tue, Nov 4
SEA
Seattle
PER
Perth
$1,358 Roundtrip, found 2 days ago
$1,358
Roundtrip
found 2 days ago
Select Singapore Airlines flight, departing Wed, Oct 29 from Seattle to Perth, returning Tue, Nov 4, priced at $1,358 found 2 days ago
Qatar Airways
Mon, Sep 15 - Fri, Sep 19
SEA
Seattle
PER
Perth
$1,395 Roundtrip, found 8 hours ago
$1,395
Roundtrip
found 8 hours ago
Select Qatar Airways flight, departing Mon, Sep 15 from Seattle to Perth, returning Fri, Sep 19, priced at $1,395 found 8 hours ago

Alternative airports near Perth

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

Select flight to Perth Airport PER. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $1,170
PER
Perth Airport
CheapestClosest
Average driving time to city center14 min
Flights from $1,170
Flights from Seattle (SEA) to Perth (PER)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Perth
Airlines serving
Air Canada, Air New Zealand, Alaska Airlines, All Nippon Airways, American Airlines, Cathay Pacific, Emirates, Hawaiian Airlines, Lufthansa, Malaysia Airlines, Philippine Airlines, Qantas Airways, Qatar Airways, Singapore Airlines, United
Roundtrip price
$1,072
Distance
9240 mi

Seattle to Perth Flights

The cheapest times to fly from Seattle to Perth

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

 

The best time to book a flight from Seattle to Perth

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

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 Perth in 2025. You can also book with separate airlines for your outbound and return journeys, from $572 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 Perth 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 Perth 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 Seattle - Tacoma Intl. Airport (SEA) to Perth Airport (PER) cost?
Discover the latest flight deals from SEA to PER by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SEA to PER?
The cheapest flights from SEA to PER are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SEA to PER?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SEA to PER. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Perth Airport (PER)?
You'll need to catch a flight with a layover if you're traveling from Seattle - Tacoma Intl. Airport (SEA) to Perth Airport (PER). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from SEA to PER?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change 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 Seattle - Tacoma Intl. Airport (SEA) to Perth Airport (PER)?
Choose a flight from Seattle - Tacoma Intl. Airport (SEA) to Perth Airport (PER) that leaves before 3 PM to reduce the risk of cancellations and delays. Later departures have a 22% higher chance of being canceled, on average.**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 Perth Airport (PER) last-minute?
Holding off until right before your break to book a flight from SEA to PER often results in higher prices. While you may come across some last-minute deals, they aren't always guaranteed. Keep your travel plans flexible to boost your chances of snagging a bargain.
Is it cheaper to book a SEA to PER flight and hotel package?
Compared with arranging hotels and flights separately, booking a SEA to PER flight and hotel package with Expedia could result in significant savings. What's more, having everything in one place will take the hassle out of planning your trip. Simply pick your flights and select from our extensive range of hotels, then tailor your trip with other add-ons like activities and car rentals.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Perth Airport (PER)?
If you booked your SEA to PER flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you'd like more information.

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Seattle nearby Airports

Seattle Paine Field Intl. Airport

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