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Cheap flights from Seattle to Perth from $683

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 22/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PER
9 Mar — 16 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Perth

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Perth
Explore the most affordable flight options available from Seattle to Perth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7 February 2026.

Mon 17/812:25
SEA
-
PER
1 stop43h 15m
Cathay Pacific
Sun 13/900:10
PER
-
SEA
1 stop25h 10m
Cathay Pacific
Deal found 4/2$1,407
Tue 7/411:45
SEA
-
PER
1 stop28h 05m
Cathay Pacific
Mon 27/400:10
PER
-
SEA
1 stop24h 55m
Cathay Pacific
Deal found 3/2$1,410
Sat 2/510:15
SEA
-
PER
1 stop30h 55m
Multiple Airlines
Sat 16/518:25
PER
-
SEA
1 stop29h 20m
Multiple Airlines
Deal found 4/2$1,488
Sun 23/819:56
SEA
-
PER
2 stops35h 44m
Cathay Pacific
Mon 31/808:20
PER
-
SEA
1 stop41h 00m
Cathay Pacific
Deal found 3/2$1,538
Sat 9/511:45
SEA
-
PER
1 stop28h 05m
Cathay Pacific
Fri 22/500:10
PER
-
SEA
1 stop24h 55m
Cathay Pacific
Deal found 5/2$1,550
Thu 2/410:15
SEA
-
PER
1 stop27h 00m
Multiple Airlines
Sun 19/420:50
PER
-
SEA
2 stops37h 25m
Multiple Airlines
Deal found 5/2$1,581

Find flight deals from Seattle to Perth

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Perth (PER). 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 7 February 2026.

Round-trip from

$1,410

One-way from

$683

Popular in

November

Cheapest in

February

Average price

$1,802
Cathay Pacific
  • Cathay Pacific
  • 7/4-27/4
  • 2 total stops
  • 53h 00m total
  • Seattle to Perth
Search Deals
22/3
  • 22/3
  • 2 total stops
  • 38h 45m total
  • Seattle to Perth
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($377 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($48 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Seattle to Perth 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 647,157 searches. Data last updated 7 February 2026.
Use the filters below to find and compare flights from Seattle to Perth that are best for you.

Fly from

Seattle

Fly to

Perth

Route

Depart

Return

Price

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 7/4

11:45-06:50

1 stop28h 05m

Perth

Mon 27/4

00:10-10:05

1 stop24h 55m

$1,410

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sat 9/5

11:45-06:50

1 stop28h 05m

Perth

Fri 22/5

00:10-10:05

1 stop24h 55m

$1,550

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Thu 2/4

10:15-04:15

1 stop27h 00m

Perth

Sun 19/4

20:50-19:15

2 stops37h 25m

$1,581

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Mon 30/3

18:59-06:50

2 stops44h 51m

Perth

Mon 13/4

08:20-10:05

1 stop40h 45m

$1,594

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sun 15/3

22:30-04:30

3 stops39h 00m

$686

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 24/3

20:10-04:15

2 stops41h 05m

$755

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 17/3

09:45-04:30

2 stops27h 45m

$766

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sat 28/3

11:00-04:15

3 stops50h 15m

$775

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Wed 25/3

22:30-04:30

2 stops39h 00m

$785

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Fri 27/3

09:45-04:55

2 stops28h 10m

$788

Flights are sorted by cheapest return flights first.

Deals found on 5/2

Showing 1-10 of 11 results
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Best time to book a flight from Seattle to Perth

Have a flexible travel schedule? Discover the best time to fly to Perth from Seattle with our price prediction graph.
Estimated return 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 Perth

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

Currently, February is the cheapest month in which you can book a flight from Seattle to Perth (average of $1,377). Flying from Seattle to Perth in January is currently the most expensive (average of $2,121). 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.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Perth. 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 Perth?

    For as low as $1,410, Cathay Pacific can have you in Perth from Seattle in 28h 05m. Seattle and Perth are separated by a distance of 14862 km.

  • Can I find deals for flights from Seattle to Perth that include hotel bookings?

    Yes. In addition to deals on Seattle to Perth flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Perth?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Perth.

  • Can I find deals for business class flights from Seattle to Perth?

    Yes. Cheapflights offers flight deals from Seattle to Perth 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 Perth?

    Currently, February is the cheapest month in which you can book a flight from Seattle to Perth (average of $1,377). Flying from Seattle to Perth in January is currently the most expensive (average of $2,121). 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

Travelling to a place near Perth?

Book flights to Perth if you plan to visit one of these locations
Scarborough
Fremantle
Rottnest Island
Mandurah

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Seattle to Perth

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Perth flights
Spokane to Perth flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Perth?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Seattle to Perth. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Perth?

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Perth for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Seattle to Perth with no change fees?

Certainly. Search results for flights to Perth from Seattle shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Seattle to Perth become cheaper?

Of course! You can now track prices for flights from Seattle to Perth and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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