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

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

What airlines fly to Perth?

Singapore Airlines, Qatar Airways and Qantas 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 63% 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 December 2025.

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.

$601 Cheap Flights from Seattle to Perth in 2025/26

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Find the cheapest flights from Seattle to Perth

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Cheap round-trip flights

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10:15 am - 11:55 pm

SEA

PER

22h 40m1 stop

1:10 am - 8:45 am

PER

SEA

22h 35m1 stop

$1,097Singapore Airlines

Tue, Apr 7 - Mon, Apr 27

10:15 am - 11:55 pm

SEA

PER

22h 40m1 stop

1:10 am - 8:45 am

PER

SEA

22h 35m1 stop

$1,104Singapore Airlines

Tue, Apr 7 - Mon, Apr 27

10:15 am - 12:30 pm

SEA

PER

35h 15m1 stop

1:10 am - 4:54 pm

PER

SEA

30h 44m2 stops

$1,190Multiple Airlines

Tue, Apr 7 - Mon, Apr 27

7:55 pm - 7:45 am

SEA

PER

44h 50m2 stops

12:10 am - 7:08 am

PER

SEA

45h 58m2 stops

$1,237Cathay Pacific

Tue, Apr 7 - Mon, Apr 27

4:05 pm - 6:45 pm

SEA

PER

34h 40m1 stop

10:45 pm - 11:40 am

PER

SEA

28h 55m1 stop

$1,282Qatar Airways

Tue, Feb 3 - Tue, Feb 24

4:05 pm - 6:45 pm

SEA

PER

34h 40m1 stop

3:55 pm - 11:40 am

PER

SEA

35h 45m1 stop

$1,301Qatar Airways

Tue, Feb 3 - Wed, Feb 25

8:45 am - 4:15 am

SEA

PER

27h 30m1 stop

2:35 pm - 8:00 am

PER

SEA

33h 25m2 stops

$1,306Multiple Airlines

Sun, Feb 1 - Fri, Feb 27

5:59 pm - 10:55 pm

SEA

PER

36h 56m2 stops

8:30 am - 9:58 pm

PER

SEA

29h 28m2 stops

$1,310Cathay Pacific

Mon, Jan 26 - Mon, Feb 2

8:25 am - 6:45 pm

SEA

PER

42h 20m2 stops

10:45 pm - 11:40 am

PER

SEA

28h 55m1 stop

$1,316Qatar Airways

Tue, Feb 3 - Tue, Feb 24

8:45 am - 4:15 am

SEA

PER

27h 30m1 stop

2:35 pm - 6:10 pm

PER

SEA

43h 35m2 stops

$1,320Multiple Airlines

Sun, Feb 1 - Mon, Feb 23

Cathay Pacific flights from Seattle to Perth

Our best Cathay Pacific deals on Seattle to Perth flight tickets

Cathay Pacific

Apr 7

SEA7:55 pmSeattle/Tacoma Intl

44h 50m

2 stops

PER7:45 amPerth

Apr 27

PER12:10 amPerth

45h 58m

2 stops

SEA7:08 amSeattle/Tacoma Intl

$1,237

Find similar

Cathay Pacific

Jan 26

SEA5:59 pmSeattle/Tacoma Intl

36h 56m

2 stops

PER10:55 pmPerth

Feb 2

PER8:30 amPerth

29h 28m

2 stops

SEA9:58 pmSeattle/Tacoma Intl

$1,310

Find similar

Cathay Pacific

Mar 1

SEA4:50 pmSeattle/Tacoma Intl

38h 05m

2 stops

PER10:55 pmPerth

Mar 5

PER8:30 amPerth

28h 17m

2 stops

SEA8:47 pmSeattle/Tacoma Intl

$1,335

Find similar

Qatar Airways flights from Seattle to Perth

Our best Qatar Airways deals on Seattle to Perth flight tickets

Qatar Airways

Feb 3

SEA4:05 pmSeattle/Tacoma Intl

34h 40m

1 stop

PER6:45 pmPerth

Feb 24

PER10:45 pmPerth

28h 55m

1 stop

SEA11:40 amSeattle/Tacoma Intl

$1,282

Find similar

Qatar Airways

Feb 3

SEA4:05 pmSeattle/Tacoma Intl

34h 40m

1 stop

PER6:45 pmPerth

Feb 25

PER3:55 pmPerth

35h 45m

1 stop

SEA11:40 amSeattle/Tacoma Intl

$1,301

Find similar

Qatar Airways

Feb 3

SEA8:25 amSeattle/Tacoma Intl

42h 20m

2 stops

PER6:45 pmPerth

Feb 24

PER10:45 pmPerth

28h 55m

1 stop

SEA11:40 amSeattle/Tacoma Intl

$1,316

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 4/7

10:15 am-11:55 pm

1 stop22h 40m

Perth

Mon 4/27

1:10 am-8:45 am

1 stop22h 35m

$1,097

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 4/7

10:15 am-11:55 pm

1 stop22h 40m

Perth

Mon 4/27

1:10 am-8:45 am

1 stop22h 35m

$1,104

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 4/7

10:15 am-12:30 pm

1 stop35h 15m

Perth

Mon 4/27

1:10 am-4:54 pm

2 stops30h 44m

$1,190

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 4/7

7:55 pm-7:45 am

2 stops44h 50m

Perth

Mon 4/27

12:10 am-7:08 am

2 stops45h 58m

$1,237

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 2/3

4:05 pm-6:45 pm

1 stop34h 40m

Perth

Tue 2/24

10:45 pm-11:40 am

1 stop28h 55m

$1,282

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 2/3

4:05 pm-6:45 pm

1 stop34h 40m

Perth

Wed 2/25

3:55 pm-11:40 am

1 stop35h 45m

$1,301

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sun 2/1

8:45 am-4:15 am

1 stop27h 30m

Perth

Fri 2/27

2:35 pm-8:00 am

2 stops33h 25m

$1,306

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Mon 1/26

5:59 pm-10:55 pm

2 stops36h 56m

Perth

Mon 2/2

8:30 am-9:58 pm

2 stops29h 28m

$1,310

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 2/3

8:25 am-6:45 pm

2 stops42h 20m

Perth

Tue 2/24

10:45 pm-11:40 am

1 stop28h 55m

$1,316

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sun 2/1

8:45 am-4:15 am

1 stop27h 30m

Perth

Mon 2/23

2:35 pm-6:10 pm

2 stops43h 35m

$1,320

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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, September 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 $1,290. If you are unable to visit Perth during the month of September, then departing from Seattle during the month February is also very affordable. Most momondo users find prices during this month for around $1,307.

What is the cheapest day to depart on your flight to Perth?

The cheapest day to depart on your flight to Perth is on a Sunday when prices can be found for as low as $1,482. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Perth is Friday, with ticket prices averaging around $1,858.

What is the cheapest time of day to depart on your flight to Perth?

In the evening is the cheapest time of day to fly from Seattle to Perth when you can find flight prices for as low as $1,497. Flying to Perth in the evening is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the morning because they tend to be around $1,690. Of course, these prices can vary depending on the time of year and what airport you fly to.

Can stopping save me money on Seattle to Perth flights?

You could potentially save up to 44% on your flight if you consider stops on a Seattle to Perth flight.

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	28h 40m
Direct flights	None

The fastest flight from Seattle to Perth takes 28h 40m

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. 28h 40m 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 December 2025.
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 (63% of total bookings). The next most popular airlines are Qatar Airways (20%) and Qantas Airways (17%).

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 $1,239	Free Cancellation	Rating 8.1 1,412 reviews	Search Singapore Airlines flights
Qantas Airways	PriceFrom $1,258	Free Cancellation	Rating 7.5 947 reviews	Search Qantas Airways flights
Qatar Airways	PriceFrom $1,307	Free Cancellation	Rating 7.4 3,677 reviews	Search Qatar Airways flights

Mandurah

Fremantle

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.