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

Cathay Pacific is the most popular carrier operating from Seattle/Tacoma Intl to Perth

What airlines fly to Perth?

Singapore Airlines, Qantas Airways and Qatar Airways are the top three most popular airlines that fly to Perth from Seattle according to our data. Singapore Airlines is the first choice among our users, with 62% of people opting to fly with this airline when traveling to Perth. Keep in mind that there are 3 different airlines that fly to Perth on a routine basis, so you have a few additional options to choose from.

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 3 as of March 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.

$544 Cheap Flights from Seattle to Perth in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

12:25 pm - 10:40 pm

SEA

PER

43h 15m

1 stop

8:20 am - 10:20 am

PER

SEA

41h 00m

1 stop

$978Cathay Pacific

Mon, Aug 17 - Mon, Sep 14

12:25 pm - 10:40 pm

SEA

PER

43h 15m

1 stop

8:20 am - 10:20 am

PER

SEA

41h 00m

1 stop

$979Cathay Pacific

Mon, Aug 17 - Mon, Sep 14

11:45 am - 10:40 pm

SEA

PER

43h 55m

1 stop

12:10 am - 10:05 am

PER

SEA

24h 55m

1 stop

$982Cathay Pacific

Tue, Apr 7 - Mon, Apr 27

12:25 pm - 10:40 pm

SEA

PER

43h 15m

1 stop

8:20 am - 7:12 am

PER

SEA

37h 52m

2 stops

$1,063Cathay Pacific

Mon, Aug 17 - Mon, Sep 14

8:41 am - 6:50 am

SEA

PER

31h 09m

2 stops

8:20 am - 10:05 am

PER

SEA

40h 45m

1 stop

$1,076Cathay Pacific

Tue, Apr 7 - Tue, Apr 28

7:51 pm - 6:50 am

SEA

PER

43h 59m

2 stops

8:20 am - 10:05 am

PER

SEA

40h 45m

1 stop

$1,080Cathay Pacific

Sun, Apr 19 - Sun, Apr 26

10:15 am - 12:30 pm

SEA

PER

35h 15m

1 stop

1:45 pm - 8:45 am

PER

SEA

34h 00m

1 stop

$1,096Singapore Airlines

Thu, Sep 3 - Sat, Oct 3

10:15 am - 12:30 pm

SEA

PER

35h 15m

1 stop

4:55 pm - 8:45 am

PER

SEA

30h 50m

1 stop

$1,099Singapore Airlines

Thu, Sep 3 - Sat, Oct 3

12:25 pm - 6:50 am

SEA

PER

27h 25m

1 stop

8:20 am - 10:20 am

PER

SEA

41h 00m

1 stop

$1,103Cathay Pacific

Thu, Aug 13 - Fri, Sep 4

12:25 pm - 10:40 pm

SEA

PER

43h 15m

1 stop

8:20 am - 9:05 am

PER

SEA

39h 45m

2 stops

$1,113Cathay Pacific

Thu, Sep 3 - Sat, Oct 3

Cathay Pacific flights from Seattle to Perth

Our best Cathay Pacific deals on Seattle to Perth flight tickets

Cathay Pacific

Aug 17

SEA12:25 pmSeattle/Tacoma Intl

43h 15m

1 stop

PER10:40 pmPerth

Sep 14

PER8:20 amPerth

41h 00m

1 stop

SEA10:20 amSeattle/Tacoma Intl

$978

Cathay Pacific

Aug 17

SEA12:25 pmSeattle/Tacoma Intl

43h 15m

1 stop

PER10:40 pmPerth

Sep 14

PER8:20 amPerth

41h 00m

1 stop

SEA10:20 amSeattle/Tacoma Intl

$979

Cathay Pacific

Apr 7

SEA11:45 amSeattle/Tacoma Intl

43h 55m

1 stop

PER10:40 pmPerth

Apr 27

PER12:10 amPerth

24h 55m

1 stop

SEA10:05 amSeattle/Tacoma Intl

$982

Singapore Airlines flights from Seattle to Perth

Our best Singapore Airlines deals on Seattle to Perth flight tickets

Singapore Airlines

Sep 3

SEA10:15 amSeattle/Tacoma Intl

35h 15m

1 stop

PER12:30 pmPerth

Oct 3

PER1:45 pmPerth

34h 00m

1 stop

SEA8:45 amSeattle/Tacoma Intl

$1,096

Singapore Airlines

Sep 3

SEA10:15 amSeattle/Tacoma Intl

35h 15m

1 stop

PER12:30 pmPerth

Oct 3

PER4:55 pmPerth

30h 50m

1 stop

SEA8:45 amSeattle/Tacoma Intl

$1,099

Singapore Airlines

Sep 3

SEA10:15 amSeattle/Tacoma Intl

27h 55m

1 stop

PER5:10 amPerth

Oct 3

PER1:45 pmPerth

34h 00m

1 stop

SEA8:45 amSeattle/Tacoma Intl

$1,161

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Mon 8/17

12:25 pm-10:40 pm

1 stop43h 15m

Perth

Mon 9/14

8:20 am-10:20 am

1 stop41h 00m

$978

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Mon 8/17

12:25 pm-10:40 pm

1 stop43h 15m

Perth

Mon 9/14

8:20 am-10:20 am

1 stop41h 00m

$979

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 4/7

11:45 am-10:40 pm

1 stop43h 55m

Perth

Mon 4/27

12:10 am-10:05 am

1 stop24h 55m

$982

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Mon 8/17

12:25 pm-10:40 pm

1 stop43h 15m

Perth

Mon 9/14

8:20 am-7:12 am

2 stops37h 52m

$1,063

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 4/7

8:41 am-6:50 am

2 stops31h 09m

Perth

Tue 4/28

8:20 am-10:05 am

1 stop40h 45m

$1,076

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sun 4/19

7:51 pm-6:50 am

2 stops43h 59m

Perth

Sun 4/26

8:20 am-10:05 am

1 stop40h 45m

$1,080

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Thu 9/3

10:15 am-12:30 pm

1 stop35h 15m

Perth

Sat 10/3

1:45 pm-8:45 am

1 stop34h 00m

$1,096

Quickest round-trip

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Thu 9/3

10:15 am-12:30 pm

1 stop35h 15m

Perth

Sat 10/3

4:55 pm-8:45 am

1 stop30h 50m

$1,099

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Thu 8/13

12:25 pm-6:50 am

1 stop27h 25m

Perth

Fri 9/4

8:20 am-10:20 am

1 stop41h 00m

$1,103

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Thu 9/3

12:25 pm-10:40 pm

1 stop43h 15m

Perth

Sat 10/3

8:20 am-9:05 am

2 stops39h 45m

$1,113

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

What is the cheapest month to fly to Perth?

In general, February 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 $1,292. If you are unable to visit Perth during the month of February, then departing from Seattle during the month September is also very affordable. Most momondo users find prices during this month for around $1,310.

Can stopping save me money on Seattle to Perth flights?

You could potentially save up to 50% 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

Fastest flight time	27h 05m
Direct flights	None

The fastest flight from Seattle to Perth takes 27h 05m

There are no direct flights from Seattle to Perth. There are no popular flight routes from Seattle to Perth.

Search flight deals

How far is Seattle/Tacoma Intl to Perth by plane?
There are 9239.1 mi between Seattle/Tacoma Intl and Perth. 27h 05m 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 3 as of March 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 (62% of total bookings). The next most popular airlines are Qantas Airways (23%) and Qatar Airways (15%).

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 $1,218	Free Cancellation	Rating 8.2 1,474 reviews	Search Singapore Airlines flights
Qantas Airways	PriceFrom $1,258	Free Cancellation	Rating 7.5 1,003 reviews	Search Qantas Airways flights
Qatar Airways	PriceFrom $1,325	Free Cancellation	Rating 7.4 3,744 reviews	Search Qatar Airways flights

Fremantle

Mandurah

Rottnest Island

Scarborough

Waikiki

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.