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 has the shortest connection time from Seattle to Perth?

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

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 offers the lowest fares from Seattle to Perth?

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

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 September 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.

$521 Cheap Flights from Seattle to Perth in 2026

Find the cheapest flights from Seattle to Perth

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:45 am - 6:50 amSEA Seattle/Tacoma Intl-PER Perth

28h 05m1 stop Hong Kong Intl

12:25 am - 9:45 amPER Perth-SEA Seattle/Tacoma Intl

24h 20m1 stop Hong Kong Intl

$1,243Cathay Pacific

Tue, Oct 20 - Wed, Oct 28

12:50 pm - 8:55 amSEA Seattle/Tacoma Intl-PER Perth

29h 05m2 stops Incheon Intl Ho Chi Minh City

5:50 pm - 8:05 amPER Perth-SEA Seattle/Tacoma Intl

29h 15m1 stop Singapore Changi

$1,257Multiple Airlines

Thu, Oct 22 - Thu, Oct 29

1:15 am - 8:55 amSEA Seattle/Tacoma Intl-PER Perth

40h 40m2 stops Taipei City Taiwan Taoyuan Intl Ho Chi Minh City

5:50 pm - 8:05 amPER Perth-SEA Seattle/Tacoma Intl

29h 15m1 stop Singapore Changi

$1,265Multiple Airlines

Mon, Oct 19 - Thu, Oct 29

11:25 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

$1,288Cathay Pacific

Mon, Oct 26 - Mon, Nov 2

3:50 pm - 6:45 pmSEA Seattle/Tacoma Intl-PER Perth

34h 55m1 stop Doha Hamad Intl

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

29h 10m1 stop Doha Hamad Intl

$1,336Qatar Airways

Mon, Mar 1 - Sat, Mar 27

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

23h 25m1 stop Singapore Changi

5:05 pm - 7:05 amPER Perth-SEA Seattle/Tacoma Intl

54h 00m1 stop Singapore Changi

$1,366Singapore Airlines

Sun, Oct 25 - Sun, Nov 1

8:40 am - 12:35 pmSEA Seattle/Tacoma Intl-PER Perth

35h 55m1 stop Singapore Changi

5:05 pm - 7:05 amPER Perth-SEA Seattle/Tacoma Intl

54h 00m1 stop Singapore Changi

$1,366Singapore Airlines

Fri, Feb 12 - Sun, Feb 21

8:40 am - 5:25 amSEA Seattle/Tacoma Intl-PER Perth

28h 45m1 stop Singapore Changi

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

21h 45m1 stop Singapore Changi

$1,502Singapore Airlines

Tue, Dec 29 - Mon, Jan 4

4:25 pm - 6:45 pmSEA Seattle/Tacoma Intl-PER Perth

35h 20m1 stop Doha Hamad Intl

10:45 pm - 12:40 pmPER Perth-SEA Seattle/Tacoma Intl

28h 55m1 stop Doha Hamad Intl

$1,593Qatar Airways

Fri, Oct 23 - Fri, Oct 30

4:25 pm - 6:45 pmSEA Seattle/Tacoma Intl-PER Perth

35h 20m1 stop Doha Hamad Intl

10:45 am - 12:40 pmPER Perth-SEA Seattle/Tacoma Intl

40h 55m2 stops Brisbane Doha Hamad Intl

$1,730Qatar Airways

Fri, Oct 23 - Fri, Oct 30

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Cathay Pacific flights from Seattle to Perth

Our best Cathay Pacific deals on Seattle to Perth flight tickets

Cathay Pacific

Oct 20

SEA11:45 amSeattle/Tacoma Intl

28h 05m

1 stop

PER6:50 amPerth

Oct 28

PER12:25 amPerth

24h 20m

1 stop

SEA9:45 amSeattle/Tacoma Intl

$1,243

Cathay Pacific

Oct 21

SEA11:45 amSeattle/Tacoma Intl

28h 05m

1 stop

PER6:50 amPerth

Nov 22

PER8:30 amPerth

40h 15m

1 stop

SEA8:45 amSeattle/Tacoma Intl

$1,253

Cathay Pacific

Oct 21

SEA11:45 amSeattle/Tacoma Intl

28h 05m

1 stop

PER6:50 amPerth

Nov 23

PER8:30 amPerth

40h 15m

1 stop

SEA8:45 amSeattle/Tacoma Intl

$1,266

Singapore Airlines flights from Seattle to Perth

Our best Singapore Airlines deals on Seattle to Perth flight tickets

Singapore Airlines

Oct 24

SEA10:15 amSeattle/Tacoma Intl

35h 20m

1 stop

PER12:35 pmPerth

Nov 23

PER1:50 pmPerth

33h 15m

1 stop

SEA7:05 amSeattle/Tacoma Intl

$1,325

Singapore Airlines

Oct 25

SEA9:40 amSeattle/Tacoma Intl

23h 25m

1 stop

PER12:05 amPerth

Nov 1

PER5:05 pmPerth

54h 00m

1 stop

SEA7:05 amSeattle/Tacoma Intl

$1,366

Singapore Airlines

Oct 25

SEA9:40 amSeattle/Tacoma Intl

35h 55m

1 stop

PER12:35 pmPerth

Nov 23

PER6:40 amPerth

40h 25m

1 stop

SEA7:05 amSeattle/Tacoma Intl

$1,488

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Tue 10/20

11:45 am-6:50 am

1 stop28h 05m

Perth

Wed 10/28

12:25 am-9:45 am

1 stop24h 20m

$1,243

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Thu 10/22

12:50 pm-8:55 am

2 stops29h 05m

Perth

Thu 10/29

5:50 pm-8:05 am

1 stop29h 15m

$1,257

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Mon 10/19

1:15 am-8:55 am

2 stops40h 40m

Perth

Thu 10/29

5:50 pm-8:05 am

1 stop29h 15m

$1,265

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Mon 10/26

11:25 am-10:55 pm

1 stop44h 30m

Perth

Mon 11/2

8:30 am-8:45 am

1 stop40h 15m

$1,288

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Mon 3/1

3:50 pm-6:45 pm

1 stop34h 55m

Perth

Sat 3/27

10:45 pm-12:55 pm

1 stop29h 10m

$1,336

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Sun 10/25

9:40 am-12:05 am

1 stop23h 25m

Perth

Sun 11/1

5:05 pm-7:05 am

1 stop54h 00m

$1,366

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Fri 2/12

8:40 am-12:35 pm

1 stop35h 55m

Perth

Sun 2/21

5:05 pm-7:05 am

1 stop54h 00m

$1,366

Quickest round-trip

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Tue 12/29

8:40 am-5:25 am

1 stop28h 45m

Perth

Mon 1/4

1:20 am-7:05 am

1 stop21h 45m

$1,502

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Fri 10/23

4:25 pm-6:45 pm

1 stop35h 20m

Perth

Fri 10/30

10:45 pm-12:40 pm

1 stop28h 55m

$1,593

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Fri 10/23

4:25 pm-6:45 pm

1 stop35h 20m

Perth

Fri 10/30

10:45 am-12:40 pm

2 stops40h 55m

$1,730

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 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 June is also very affordable. Most momondo users find prices during this month for around $1,231.

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	$521
Fastest flight time	28h 30m
Direct flights	None

The best one-way flight to Perth from Seattle in the past 72 hours is $521. The best round-trip flight deal from Seattle to Perth found on momondo in the last 72 hours is $1,243.

The fastest flight from Seattle to Perth takes 28h 30m

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. 28h 30m 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 September 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 (77% of total bookings). The next most popular airline is Qatar Airways (23%).

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 1,600 reviews		Search Singapore Airlines flights
Qatar Airways	PriceFrom $1,240	Free Cancellation	Rating 7.4 3,733 reviews		Search Qatar Airways flights

Rottnest Island

Fremantle

Mandurah

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.