What is the cheapest airline that flies from Seattle/Tacoma Intl to Perth?

Philippine Airlines and Cathay Pacific are the most popular carriers operating from Seattle/Tacoma Intl to Perth

Which airport is the most popular layover for flights between Seattle and Perth?

Hong Kong (HKG) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Seattle to Perth?

Flights via Singapore (SIN) offer the lowest average round-trip price of $1,291.

Which layover airport has the shortest travel time from Seattle to Perth?

Flights connecting via Singapore (SIN) have the shortest average one-way travel time: 23h 10m.

Which layover airport has the shortest connection time from Seattle to Perth?

Singapore (SIN) has the shortest average layover time for this route: 1h 48m.

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 were last updated today.

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Perth Airport?

The number of operators available for flights from Seattle/Tacoma Intl Airport to Perth Airport is 2 as of October 2026.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. 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 travel and health documents you'll need for your trip to Perth Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Perth Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$524 Cheap Flights from Seattle to Perth in 2026/27

Find the cheapest flights from Seattle to Perth

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:40 am - 8:25 amSEA Seattle/Tacoma Intl-PER Perth

31h 45m1 stop Singapore Changi

6:30 pm - 9:05 amPER Perth-SEA Seattle/Tacoma Intl

30h 35m2 stops Denpasar Bali Ngurah Rai Incheon Intl

$1,184Multiple Airlines

Sun, Nov 29 - Sun, Dec 6

9:40 am - 12:35 pmSEA Seattle/Tacoma Intl-PER Perth

35h 55m1 stop Singapore Changi

1:45 pm - 8:45 amPER Perth-SEA Seattle/Tacoma Intl

34h 00m1 stop Singapore Changi

$1,266Singapore Airlines

Sat, Mar 20 - Fri, Apr 16

10:25 am - 10:55 pmSEA Seattle/Tacoma Intl-PER Perth

44h 30m1 stop Hong Kong Intl

8:30 am - 8:45 amPER Perth-SEA Seattle/Tacoma Intl

40h 15m1 stop Hong Kong Intl

$1,278Cathay Pacific

Thu, Mar 4 - Sun, Mar 14

10:03 am - 6:55 amSEA Seattle/Tacoma Intl-PER Perth

28h 52m2 stops Vancouver Intl Hong Kong Intl

8:30 am - 8:45 amPER Perth-SEA Seattle/Tacoma Intl

40h 15m1 stop Hong Kong Intl

$1,282Multiple Airlines

Thu, Mar 4 - Sun, Mar 14

9:00 pm - 6:55 amSEA Seattle/Tacoma Intl-PER Perth

41h 55m2 stops Los Angeles Hong Kong Intl

8:30 am - 8:45 amPER Perth-SEA Seattle/Tacoma Intl

40h 15m1 stop Hong Kong Intl

$1,343Multiple Airlines

Sun, Nov 15 - Sun, Nov 22

8:40 am - 12:05 amSEA Seattle/Tacoma Intl-PER Perth

23h 25m1 stop Singapore Changi

6:40 am - 7:05 amPER Perth-SEA Seattle/Tacoma Intl

40h 25m1 stop Singapore Changi

$1,412Singapore Airlines

Tue, Dec 1 - Tue, Dec 8

8:40 am - 12:05 amSEA Seattle/Tacoma Intl-PER Perth

23h 25m1 stop Singapore Changi

6:40 am - 7:05 amPER Perth-SEA Seattle/Tacoma Intl

40h 25m1 stop Singapore Changi

$1,413Singapore Airlines

Tue, Dec 1 - Tue, Dec 8

10:55 am - 6:45 pmSEA Seattle/Tacoma Intl-PER Perth

40h 50m2 stops San Francisco Doha Hamad Intl

10:45 pm - 12:55 pmPER Perth-SEA Seattle/Tacoma Intl

29h 10m1 stop Doha Hamad Intl

$1,446Qatar Airways

Sat, Mar 20 - Fri, Apr 16

10:55 am - 6:45 pmSEA Seattle/Tacoma Intl-PER Perth

40h 50m2 stops San Francisco Doha Hamad Intl

10:45 pm - 12:55 pmPER Perth-SEA Seattle/Tacoma Intl

29h 10m1 stop Doha Hamad Intl

$1,448Qatar Airways

Sat, Mar 20 - Fri, Apr 16

8:45 am - 6:45 pmSEA Seattle/Tacoma Intl-PER Perth

43h 00m2 stops San Francisco Doha Hamad Intl

10:45 pm - 12:55 pmPER Perth-SEA Seattle/Tacoma Intl

29h 10m1 stop Doha Hamad Intl

$1,448Qatar Airways

Sat, Mar 20 - Fri, Apr 16

Cheap last minute flights

Enter your travel dates to find the best prices.

11:45 am - 10:40 pmSEA Seattle/Tacoma Intl-PER Perth

43h 55m1 stop Hong Kong Intl

8:30 am - 8:45 amPER Perth-SEA Seattle/Tacoma Intl

40h 15m1 stop Hong Kong Intl

$1,302Cathay Pacific

Thu, Oct 22 - Tue, Nov 24

11:45 am - 10:40 pmSEA Seattle/Tacoma Intl-PER Perth

43h 55m1 stop Hong Kong Intl

8:30 am - 8:45 amPER Perth-SEA Seattle/Tacoma Intl

40h 15m1 stop Hong Kong Intl

$1,302Cathay Pacific

Thu, Oct 22 - Mon, Nov 23

11:45 am - 6:55 amSEA Seattle/Tacoma Intl-PER Perth

28h 10m1 stop Hong Kong Intl

8:30 am - 8:45 amPER Perth-SEA Seattle/Tacoma Intl

40h 15m1 stop Hong Kong Intl

$1,329Cathay Pacific

Sat, Oct 24 - Mon, Nov 23

11:45 am - 10:40 pmSEA Seattle/Tacoma Intl-PER Perth

43h 55m1 stop Hong Kong Intl

12:25 am - 8:45 amPER Perth-SEA Seattle/Tacoma Intl

24h 20m1 stop Hong Kong Intl

$1,339Cathay Pacific

Thu, Oct 22 - Tue, Nov 24

11:45 am - 10:40 pmSEA Seattle/Tacoma Intl-PER Perth

43h 55m1 stop Hong Kong Intl

12:25 am - 8:45 amPER Perth-SEA Seattle/Tacoma Intl

24h 20m1 stop Hong Kong Intl

$1,339Cathay Pacific

Thu, Oct 22 - Wed, Nov 18

9:40 am - 12:05 amSEA Seattle/Tacoma Intl-PER Perth

47h 25m1 stop Singapore Changi

1:20 am - 7:05 amPER Perth-SEA Seattle/Tacoma Intl

21h 45m1 stop Singapore Changi

$1,632Singapore Airlines

Sun, Oct 25 - Sat, Nov 21

9:40 am - 5:25 amSEA Seattle/Tacoma Intl-PER Perth

28h 45m1 stop Singapore Changi

6:40 am - 7:05 amPER Perth-SEA Seattle/Tacoma Intl

40h 25m1 stop Singapore Changi

$1,746Singapore Airlines

Sun, Oct 25 - Mon, Nov 23

9:40 am - 5:25 amSEA Seattle/Tacoma Intl-PER Perth

28h 45m1 stop Singapore Changi

6:40 am - 7:05 amPER Perth-SEA Seattle/Tacoma Intl

40h 25m1 stop Singapore Changi

$1,796Singapore Airlines

Sun, Oct 25 - Sat, Nov 21

9:40 am - 5:25 amSEA Seattle/Tacoma Intl-PER Perth

28h 45m1 stop Singapore Changi

6:40 am - 7:05 amPER Perth-SEA Seattle/Tacoma Intl

40h 25m1 stop Singapore Changi

$1,796Singapore Airlines

Sun, Oct 25 - Thu, Nov 19

4:50 pm - 6:45 pmSEA Seattle/Tacoma Intl-PER Perth

34h 55m1 stop Doha Hamad Intl

10:45 pm - 12:15 pmPER Perth-SEA Seattle/Tacoma Intl

29h 30m1 stop Doha Hamad Intl

$1,832Qatar Airways

Sun, Oct 25 - Fri, Nov 20

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Cathay Pacific flights from Seattle to Perth

Our best Cathay Pacific deals on Seattle to Perth flight tickets

Cathay Pacific

Mar 4

SEA10:25 amSeattle/Tacoma Intl

44h 30m

1 stop

PER10:55 pmPerth

Mar 14

PER8:30 amPerth

40h 15m

1 stop

SEA8:45 amSeattle/Tacoma Intl

$1,278

Cathay Pacific

Oct 27

SEA11:25 amSeattle/Tacoma Intl

28h 30m

1 stop

PER6:55 amPerth

Nov 24

PER8:30 amPerth

40h 15m

1 stop

SEA8:45 amSeattle/Tacoma Intl

$1,279

Cathay Pacific

Oct 22

SEA11:45 amSeattle/Tacoma Intl

43h 55m

1 stop

PER10:40 pmPerth

Nov 23

PER8:30 amPerth

40h 15m

1 stop

SEA8:45 amSeattle/Tacoma Intl

$1,302

Singapore Airlines flights from Seattle to Perth

Our best Singapore Airlines deals on Seattle to Perth flight tickets

Singapore Airlines

Mar 20

SEA9:40 amSeattle/Tacoma Intl

35h 55m

1 stop

PER12:35 pmPerth

Apr 16

PER1:45 pmPerth

34h 00m

1 stop

SEA8:45 amSeattle/Tacoma Intl

$1,266

Singapore Airlines

Dec 1

SEA8:40 amSeattle/Tacoma Intl

23h 25m

1 stop

PER12:05 amPerth

Dec 8

PER6:40 amPerth

40h 25m

1 stop

SEA7:05 amSeattle/Tacoma Intl

$1,412

Singapore Airlines

Dec 1

SEA8:40 amSeattle/Tacoma Intl

23h 25m

1 stop

PER12:05 amPerth

Dec 8

PER6:40 amPerth

40h 25m

1 stop

SEA7:05 amSeattle/Tacoma Intl

$1,413

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Sun 11/29

8:40 am-8:25 am

1 stop31h 45m

Perth

Sun 12/6

6:30 pm-9:05 am

2 stops30h 35m

$1,184

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Sat 3/20

9:40 am-12:35 pm

1 stop35h 55m

Perth

Fri 4/16

1:45 pm-8:45 am

1 stop34h 00m

$1,266

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Thu 3/4

10:25 am-10:55 pm

1 stop44h 30m

Perth

Sun 3/14

8:30 am-8:45 am

1 stop40h 15m

$1,278

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Thu 3/4

10:03 am-6:55 am

2 stops28h 52m

Perth

Sun 3/14

8:30 am-8:45 am

1 stop40h 15m

$1,282

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Sun 11/15

9:00 pm-6:55 am

2 stops41h 55m

Perth

Sun 11/22

8:30 am-8:45 am

1 stop40h 15m

$1,343

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Tue 12/1

8:40 am-12:05 am

1 stop23h 25m

Perth

Tue 12/8

6:40 am-7:05 am

1 stop40h 25m

$1,412

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Tue 12/1

8:40 am-12:05 am

1 stop23h 25m

Perth

Tue 12/8

6:40 am-7:05 am

1 stop40h 25m

$1,413

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Sat 3/20

10:55 am-6:45 pm

2 stops40h 50m

Perth

Fri 4/16

10:45 pm-12:55 pm

1 stop29h 10m

$1,446

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Sat 3/20

10:55 am-6:45 pm

2 stops40h 50m

Perth

Fri 4/16

10:45 pm-12:55 pm

1 stop29h 10m

$1,448

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Sat 3/20

8:45 am-6:45 pm

2 stops43h 00m

Perth

Fri 4/16

10:45 pm-12:55 pm

1 stop29h 10m

$1,448

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Layovers

What is the typical price of a round-trip flight between Seattle and Perth?

Prices are currently low for flights on this route.

Typical prices usually range from $1,287 to $1,401.
The lowest price recently found on this route was $1,184.

What is the cheapest month to fly to Perth?

In general, July is the cheapest month to fly from Seattle to Perth. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you are unable to visit Perth during the month of July, then departing from Seattle during the month February is also very affordable. Most momondo users find prices during this month for around $0.

Can stopping save me money on Seattle to Perth flights?

You could potentially save up to 5% 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 round-trip 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

Best Price Found	$524
Fastest flight time	23h 25m
Direct flights	None

The best one-way flight to Perth from Seattle in the past 72 hours is $524. The best round-trip flight deal from Seattle to Perth found on momondo in the last 72 hours is $1,184.

The fastest flight from Seattle to Perth takes 23h 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?
There are 9239.1 mi between Seattle/Tacoma Intl and Perth. 23h 25m is a normal flight duration for this route.
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 were last updated today.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Perth Airport?
The number of operators available for flights from Seattle/Tacoma Intl Airport to Perth Airport is 2 as of October 2026.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Perth Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. 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 travel and health documents you'll need for your trip to Perth Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Perth Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Seattle to Perth?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Seattle to Perth is Singapore Airlines (79% of total bookings). The next most popular airline is Qatar Airways (21%).

Best airlines flying from Seattle to Perth

Compare and see reviews for airlines that fly from Seattle to Perth with momondo

Airline	Rating	Free Cancellation	Price
Singapore Airlines	PriceFrom $1,232	Free Cancellation	Rating 8.2 1,628 reviews		Search Singapore Airlines flights
Qatar Airways	PriceFrom $1,240	Free Cancellation	Rating 7.3 3,714 reviews		Search Qatar Airways flights

Fremantle

Mandurah

Rottnest Island

Scarborough

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Perth. Millions of users trust and use momondo every year so you are in good hands.

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

Flights from Seattle to Perth with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Perth from Seattle.

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

Price alerts on flights to Perth from Seattle are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.