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Cheap flights from Seattle to Perth from $765

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Perth departing on 30/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Seattle to Perth

Cheap return flights

Enter your travel dates to find the best prices.
Cathay Pacific Logo
12:25 - 06:50SEA  Seattle/Tacoma Intl-PER Perth
27h 25m1 stop Hong Kong Intl
Cathay Pacific Logo
00:10 - 10:05PER  Perth-SEA Seattle/Tacoma Intl
24h 55m1 stop Hong Kong Intl
$1,653Cathay Pacific
Wed, 9 Sep - Tue, 29 Sep
Cathay Pacific Logo
12:25 - 22:40SEA  Seattle/Tacoma Intl-PER Perth
43h 15m1 stop Hong Kong Intl
Cathay Pacific Logo
00:25 - 09:10PER  Perth-SEA Seattle/Tacoma Intl
24h 45m1 stop Hong Kong Intl
$1,689Cathay Pacific
Tue, 8 Sep - Mon, 2 Nov
Cathay Pacific Logo
11:45 - 06:50SEA  Seattle/Tacoma Intl-PER Perth
28h 05m1 stop Hong Kong Intl
Cathay Pacific Logo
08:30 - 09:10PER  Perth-SEA Seattle/Tacoma Intl
40h 40m1 stop Hong Kong Intl
$1,721Cathay Pacific
Tue, 20 Oct - Tue, 24 Nov
Cathay Pacific Logo
11:45 - 06:50SEA  Seattle/Tacoma Intl-PER Perth
28h 05m1 stop Hong Kong Intl
Cathay Pacific Logo
00:25 - 09:10PER  Perth-SEA Seattle/Tacoma Intl
24h 45m1 stop Hong Kong Intl
$1,721Cathay Pacific
Tue, 20 Oct - Sun, 22 Nov
Cathay Pacific Logo
11:50 - 22:55SEA  Seattle/Tacoma Intl-PER Perth
44h 05m1 stop Hong Kong Intl
Cathay Pacific Logo
08:30 - 09:10PER  Perth-SEA Seattle/Tacoma Intl
40h 40m1 stop Hong Kong Intl
$1,721Cathay Pacific
Mon, 26 Oct - Mon, 23 Nov
Cathay Pacific Logo
11:45 - 06:50SEA  Seattle/Tacoma Intl-PER Perth
28h 05m1 stop Hong Kong Intl
Cathay Pacific Logo
08:30 - 09:10PER  Perth-SEA Seattle/Tacoma Intl
40h 40m1 stop Hong Kong Intl
$1,721Cathay Pacific
Tue, 20 Oct - Sun, 22 Nov
Cathay Pacific Logo
11:50 - 22:55SEA  Seattle/Tacoma Intl-PER Perth
44h 05m1 stop Hong Kong Intl
Cathay Pacific Logo
08:30 - 09:10PER  Perth-SEA Seattle/Tacoma Intl
40h 40m1 stop Hong Kong Intl
$1,721Cathay Pacific
Mon, 26 Oct - Tue, 24 Nov
Cathay Pacific Logo
11:50 - 22:55SEA  Seattle/Tacoma Intl-PER Perth
44h 05m1 stop Hong Kong Intl
Cathay Pacific Logo
08:30 - 09:10PER  Perth-SEA Seattle/Tacoma Intl
40h 40m1 stop Hong Kong Intl
$1,721Cathay Pacific
Mon, 26 Oct - Sun, 22 Nov
Cathay Pacific Logo
12:25 - 06:50SEA  Seattle/Tacoma Intl-PER Perth
27h 25m1 stop Hong Kong Intl
Cathay Pacific Logo
08:20 - 10:20PER  Perth-SEA Seattle/Tacoma Intl
41h 00m1 stop Hong Kong Intl
$1,742Cathay Pacific
Thu, 3 Sep - Sun, 13 Sep
Cathay Pacific Logo
12:25 - 06:50SEA  Seattle/Tacoma Intl-PER Perth
27h 25m1 stop Hong Kong Intl
Cathay Pacific Logo
00:10 - 12:57PER  Perth-SEA Seattle/Tacoma Intl
27h 47m2 stops Hong Kong Intl Vancouver Intl
$1,755Cathay Pacific
Wed, 9 Sep - Tue, 29 Sep

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Cathay Pacific flights from Seattle to Perth

Our best Cathay Pacific deals on Seattle to Perth flight tickets
Cathay Pacific
9 Sept
SEA12:25Seattle/Tacoma Intl
27h 25m
1 stop
PER06:50Perth
29 Sept
PER00:10Perth
24h 55m
1 stop
SEA10:05Seattle/Tacoma Intl
$1,653
Cathay Pacific
3 Sept
SEA12:25Seattle/Tacoma Intl
27h 25m
1 stop
PER06:50Perth
14 Sept
PER08:20Perth
41h 00m
1 stop
SEA10:20Seattle/Tacoma Intl
$1,689
Cathay Pacific
20 Oct
SEA11:45Seattle/Tacoma Intl
28h 05m
1 stop
PER06:50Perth
24 Nov
PER08:30Perth
40h 40m
1 stop
SEA09:10Seattle/Tacoma Intl
$1,721

Qatar Airways flights from Seattle to Perth

Our best Qatar Airways deals on Seattle to Perth flight tickets
Qatar Airways
3 Sept
SEA16:25Seattle/Tacoma Intl
35h 10m
1 stop
PER18:35Perth
17 Sept
PER22:45Perth
29h 00m
1 stop
SEA12:45Seattle/Tacoma Intl
$1,823
Qatar Airways
17 Aug
SEA16:25Seattle/Tacoma Intl
35h 10m
1 stop
PER18:35Perth
14 Sept
PER22:45Perth
29h 00m
1 stop
SEA12:45Seattle/Tacoma Intl
$1,827
Qatar Airways
4 Sept
SEA16:25Seattle/Tacoma Intl
35h 10m
1 stop
PER18:35Perth
14 Sept
PER22:45Perth
29h 00m
1 stop
SEA12:45Seattle/Tacoma Intl
$1,884

momondo 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, momondo users made 78,305 searches. Data last updated 12 August 2026.
Use the filters below to find and compare flights from Seattle to Perth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Wed 9/9

12:25-06:50

1 stop27h 25m

Perth

Tue 29/9

00:10-10:05

1 stop24h 55m

$1,653

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Tue 8/9

12:25-22:40

1 stop43h 15m

Perth

Mon 2/11

00:25-09:10

1 stop24h 45m

$1,689

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Tue 20/10

11:45-06:50

1 stop28h 05m

Perth

Tue 24/11

08:30-09:10

1 stop40h 40m

$1,721

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Tue 20/10

11:45-06:50

1 stop28h 05m

Perth

Sun 22/11

00:25-09:10

1 stop24h 45m

$1,721

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Mon 26/10

11:50-22:55

1 stop44h 05m

Perth

Mon 23/11

08:30-09:10

1 stop40h 40m

$1,721

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Tue 20/10

11:45-06:50

1 stop28h 05m

Perth

Sun 22/11

08:30-09:10

1 stop40h 40m

$1,721

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Mon 26/10

11:50-22:55

1 stop44h 05m

Perth

Tue 24/11

08:30-09:10

1 stop40h 40m

$1,721

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Mon 26/10

11:50-22:55

1 stop44h 05m

Perth

Sun 22/11

08:30-09:10

1 stop40h 40m

$1,721

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Thu 3/9

12:25-06:50

1 stop27h 25m

Perth

Sun 13/9

08:20-10:20

1 stop41h 00m

$1,742

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Wed 9/9

12:25-06:50

1 stop27h 25m

Perth

Tue 29/9

00:10-12:57

2 stops27h 47m

$1,755

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Perth from

How to get the cheapest flight ticket from Seattle to Perth

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Perth?

The month of July is, on average, the cheapest month to fly to Perth from Seattle, with most prices found around $0. If you’re not able to fly to Perth in July, then June is your next best option. Flight prices from Seattle to Perth during June average around $1,744.

Can stopping save me money on Seattle to Perth flights?

You could potentially save up to 3% on your flight if you consider stops on a Seattle to Perth flight.

How have Seattle to Perth flight prices changed over time?

When to book flights from Seattle to Perth

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Perth according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Seattle to Perth (SEA to PER) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Perth

Fastest flight time

27h 25m

Direct flights

None
The fastest flight from Seattle to Perth takes 27h 25m
There are no direct flights from Seattle to Perth. There are no popular flight routes from Seattle to Perth.
Search flight deals

Frequently asked questions about flying from Seattle to Perth

  • How far is Seattle/Tacoma Intl to Perth by plane?

    A flight from Seattle/Tacoma Intl to Perth will travel around 14868.9 km. Flights usually cover this in 27h 25m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Perth Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Perth Airport refresh daily.

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Perth Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Perth Airport.

  • What documentation or ID do you need to fly to Perth Airport?

    The necessary travel and health documents for your Perth Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Travelling to a place near Perth?

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

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Perth?

Finding the right flight to Perth from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Perth quick and easy, saving you time and money.

Can I find flights from Seattle to Perth with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Perth from Seattle with this policy.

How can momondo help me find flights from Seattle to Perth?

momondo helps you find the best flight between Seattle and Perth by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Seattle to Perth right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Perth, momondo offers a useful price alert feature which will track prices for flights to Perth from Seattle and alert you when they change.

An easier way to manage your Perth trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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