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Cheap flights from Seattle to Perth from $777

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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PER
21 Aug — 28 Aug1
1 adult

Cheap 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 16 August 2025.

Round-trip from

$1,730

One-way from

$777

Popular in

January

Cheapest in

February

Average price

$2,405
Singapore Airlines
  • Singapore Airlines
  • 30/10-19/11
  • 2 total stops
  • 69h 10m total
  • Seattle to Perth
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9/9
  • 9/9
  • 2 total stops
  • 28h 00m total
  • Seattle to Perth
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($184 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease ($53 potential savings vs. average return price).
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Average for round-trip flights in August 2025
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Find flight deals from Seattle to Perth

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 16 August 2025.

Thu 30/1009:45SEA - PER
1 stop35h 50mSingapore Airlines
Wed 19/1113:50PER - SEA
1 stop33h 20mSingapore Airlines
Deal found 14/8$1,730
Sun 2/1108:45SEA - PER
1 stop28h 40mSingapore Airlines
Wed 19/1117:05PER - SEA
1 stop30h 05mSingapore Airlines
Deal found 14/8$1,753
Thu 30/1015:40SEA - PER
2 stops33h 15mAir Canada
Wed 19/1115:15PER - SEA
2 stops34h 16mAir Canada
Deal found 14/8$1,825
Sun 9/1115:40SEA - PER
2 stops37h 55mAir Canada
Thu 20/1122:30PER - SEA
2 stops39h 36mAir Canada
Deal found 14/8$1,836
Sun 9/1115:40SEA - PER
2 stops37h 55mAir Canada
Wed 19/1116:45PER - SEA
2 stops37h 41mAir Canada
Deal found 14/8$1,842
Sat 20/918:05SEA - PER
2 stops32h 00mQantas Airways
Fri 3/1010:30PER - SEA
2 stops24h 54mQantas Airways
Deal found 15/8$1,881
Thu 30/1008:24SEA - PER
2 stops31h 31mCathay Pacific
Tue 18/1100:15PER - SEA
2 stops30h 21mCathay Pacific
Deal found 14/8$1,928
Sun 2/1108:05SEA - PER
2 stops37h 45mMultiple Airlines
Tue 18/1100:15PER - SEA
2 stops25h 35mMultiple Airlines
Deal found 14/8$1,936
Sun 9/1118:50SEA - PER
2 stops44h 05mCathay Pacific
Tue 18/1100:15PER - SEA
2 stops30h 21mCathay Pacific
Deal found 14/8$1,944
Tue 11/1115:40SEA - PER
2 stops37h 55mAir Canada
Thu 20/1122:30PER - SEA
2 stops27h 01mAir Canada
Deal found 14/8$1,956

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 16 August 2025.
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

Thu 30/10

09:45-12:35

1 stop35h 50m

Perth

Wed 19/11

13:50-07:10

1 stop33h 20m

$1,730

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sun 2/11

08:45-05:25

1 stop28h 40m

Perth

Wed 19/11

17:05-07:10

1 stop30h 05m

$1,753

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sun 2/11

20:00-21:35

2 stops33h 35m

Perth

Wed 19/11

15:15-09:31

2 stops34h 16m

$1,825

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Thu 30/10

15:40-15:55

2 stops33h 15m

Perth

Wed 19/11

15:15-09:31

2 stops34h 16m

$1,825

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sun 9/11

15:40-21:35

2 stops37h 55m

Perth

Thu 20/11

22:30-22:06

2 stops39h 36m

$1,836

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sun 9/11

15:40-21:35

2 stops37h 55m

Perth

Tue 18/11

16:45-09:31

2 stops32h 46m

$1,842

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sun 9/11

15:40-21:35

2 stops37h 55m

Perth

Wed 19/11

16:45-14:26

2 stops37h 41m

$1,842

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sat 20/9

18:05-17:05

2 stops32h 00m

Perth

Fri 3/10

10:30-20:24

2 stops24h 54m

$1,881

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sun 9/11

08:45-12:35

1 stop35h 50m

Perth

Tue 18/11

01:10-07:10

1 stop46h 00m

$1,901

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Thu 30/10

08:24-06:55

2 stops31h 31m

Perth

Tue 18/11

00:15-14:36

2 stops30h 21m

$1,928

Flights are sorted by cheapest return flights first.

Deals found on 14/8

Showing 1-10 of 19 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, May is the cheapest month in which you can book a flight from Seattle to Perth (average of $285). Flying from Seattle to Perth in December is currently the most expensive (average of $409). 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.

  • 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, May is the cheapest month in which you can book a flight from Seattle to Perth (average of $285). Flying from Seattle to Perth in December is currently the most expensive (average of $409). 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
Mandurah
Scarborough
Fremantle
Rottnest Island

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.
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Fly with Cheapflights

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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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