Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Perth from $541

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 8/26. 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
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

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

Trusted and free

Trusted and free

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

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Seattle to Perth (SEA-PER)

Cheap round-trip flights

Logo
11:00 am - 10:45 amSEA-PER
31h 45m2 stops
Logo
8:40 am - 7:35 pmPER-SEA
25h 55m1 stop
$1,119
Find Deal
Mon, Feb 9 - Thu, Mar 12
Philippine Airlines Logo
7:55 pm - 7:20 amSEA-PER
43h 25m2 stops
Philippine Airlines Logo
8:40 am - 7:35 pmPER-SEA
25h 55m1 stop
$1,170Philippine Airlines
Find Deal
Mon, Feb 9 - Thu, Mar 12
Logo
12:10 am - 4:50 amSEA-PER
36h 40m2 stops
Logo
8:40 am - 7:35 pmPER-SEA
25h 55m1 stop
$1,179
Find Deal
Sun, Feb 8 - Thu, Mar 12
Air Canada Logo
8:00 pm - 9:35 pmSEA-PER
33h 35m2 stops
Air Canada Logo
10:30 pm - 9:31 amPER-SEA
26h 01m2 stops
$1,184Air Canada
Find Deal
Mon, Feb 9 - Thu, Mar 12
Qantas Airways Logo
5:05 pm - 5:05 pmSEA-PER
33h 00m2 stops
Qantas Airways Logo
10:30 am - 9:58 pmPER-SEA
26h 28m2 stops
$1,222Qantas Airways
Find Deal
Sun, Aug 31 - Sat, Sep 13
Qantas Airways Logo
5:40 pm - 12:25 pmSEA-PER
26h 45m2 stops
Qantas Airways Logo
8:00 am - 6:49 pmPER-SEA
25h 49m2 stops
$1,259Qantas Airways
Find Deal
Mon, Feb 9 - Thu, Mar 12
Qatar Airways Logo
4:05 pm - 12:00 pmSEA-PER
27h 55m1 stop
Qatar Airways Logo
10:45 pm - 12:40 pmPER-SEA
28h 55m1 stop
$1,268Qatar Airways
Find Deal
Mon, Feb 9 - Thu, Mar 12
Qatar Airways Logo
4:30 pm - 11:55 amSEA-PER
28h 25m1 stop
Qatar Airways Logo
10:45 pm - 12:45 pmPER-SEA
29h 00m1 stop
$1,305Qatar Airways
Find Deal
Fri, Sep 12 - Tue, Sep 23
Singapore Airlines Logo
10:15 am - 5:10 amSEA-PER
27h 55m1 stop
Singapore Airlines Logo
5:10 pm - 8:45 amPER-SEA
30h 35m1 stop
$1,631Singapore Airlines
Find Deal
Sat, Oct 4 - Sat, Oct 11
Singapore Airlines Logo
6:55 am - 2:45 pmSEA-PER
39h 50m3 stops
Singapore Airlines Logo
1:10 am - 1:52 pmPER-SEA
27h 42m2 stops
$1,667Singapore Airlines
Find Deal
Mon, Feb 9 - Wed, Mar 11

Qantas Airways flights from Seattle to Perth

Our best Qantas Airways deals on Seattle to Perth flight tickets
Qantas Airways
Aug 31
SEA5:05 pmSeattle/Tacoma Intl
33h 00m
2 stops
PER5:05 pmPerth
Sep 13
PER10:30 amPerth
26h 28m
2 stops
SEA9:58 pmSeattle/Tacoma Intl
$1,222
Find similar
Qantas Airways
Feb 9
SEA5:40 pmSeattle/Tacoma Intl
26h 45m
2 stops
PER12:25 pmPerth
Mar 12
PER8:00 amPerth
25h 49m
2 stops
SEA6:49 pmSeattle/Tacoma Intl
$1,259
Find similar
Qantas Airways
Feb 9
SEA3:35 pmSeattle/Tacoma Intl
33h 45m
2 stops
PER5:20 pmPerth
Mar 12
PER11:55 pmPerth
33h 54m
2 stops
SEA6:49 pmSeattle/Tacoma Intl
$1,260
Find similar

Cathay Pacific flights from Seattle to Perth

Our best Cathay Pacific deals on Seattle to Perth flight tickets
Cathay Pacific
Aug 31
SEA5:59 pmSeattle/Tacoma Intl
37h 41m
2 stops
PER10:40 pmPerth
Sep 12
PER12:10 amPerth
36h 48m
2 stops
SEA9:58 pmSeattle/Tacoma Intl
$1,315
Find similar
Cathay Pacific
Sep 5
SEA8:08 pmSeattle/Tacoma Intl
35h 32m
2 stops
PER10:40 pmPerth
Sep 13
PER12:10 amPerth
36h 48m
2 stops
SEA9:58 pmSeattle/Tacoma Intl
$1,359
Find similar
Cathay Pacific
Sep 12
SEA7:25 amSeattle/Tacoma Intl
33h 20m
2 stops
PER7:45 amPerth
Sep 22
PER12:10 amPerth
36h 48m
2 stops
SEA9:58 pmSeattle/Tacoma Intl
$1,471
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated August 20, 2025.
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

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Mon 2/9

11:00 am-10:45 am

2 stops31h 45m

Perth

Thu 3/12

8:40 am-7:35 pm

1 stop25h 55m

$1,119

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Mon 2/9

7:55 pm-7:20 am

2 stops43h 25m

Perth

Thu 3/12

8:40 am-7:35 pm

1 stop25h 55m

$1,170

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sun 2/8

12:10 am-4:50 am

2 stops36h 40m

Perth

Thu 3/12

8:40 am-7:35 pm

1 stop25h 55m

$1,179

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Mon 2/9

8:00 pm-9:35 pm

2 stops33h 35m

Perth

Thu 3/12

10:30 pm-9:31 am

2 stops26h 01m

$1,184

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sun 8/31

5:05 pm-5:05 pm

2 stops33h 00m

Perth

Sat 9/13

10:30 am-9:58 pm

2 stops26h 28m

$1,222

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Mon 2/9

5:40 pm-12:25 pm

2 stops26h 45m

Perth

Thu 3/12

8:00 am-6:49 pm

2 stops25h 49m

$1,259

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Mon 2/9

4:05 pm-12:00 pm

1 stop27h 55m

Perth

Thu 3/12

10:45 pm-12:40 pm

1 stop28h 55m

$1,268

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Fri 9/12

4:30 pm-11:55 am

1 stop28h 25m

Perth

Tue 9/23

10:45 pm-12:45 pm

1 stop29h 00m

$1,305

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sat 10/4

10:15 am-5:10 am

1 stop27h 55m

Perth

Sat 10/11

5:10 pm-8:45 am

1 stop30h 35m

$1,631

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Mon 2/9

6:55 am-2:45 pm

3 stops39h 50m

Perth

Wed 3/11

1:10 am-1:52 pm

2 stops27h 42m

$1,667

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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?

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 $1,318. If you are unable to visit Perth during the month of February, then departing from Seattle during the month October is also very affordable. Most momondo users find prices during this month for around $1,432.

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 28% on your flight if you consider stops on a Seattle to Perth flight.

How have Seattle to Perth flight prices changed over time?

As of August 2025, prices for Seattle to Perth flights are approximately 21% cheaper when compared to flights at the same time last year.

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

Direct flights

None
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. 26h 45m 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?

  • 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?

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
Air CanadaPriceFrom $1,158Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
Singapore AirlinesPriceFrom $1,218Free CancellationRating
8.1
1,347 reviews
Search Singapore Airlines flights
Qatar AirwaysPriceFrom $1,315Free CancellationRating
7.4
3,611 reviews
Search Qatar Airways flights
Qantas AirwaysPriceFrom $1,318Free CancellationRating
7.5
896 reviews
Search Qantas Airways flights

Traveling to a place near Perth?

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

An easier way to manage your Perth trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Mon 8/25
Mon 9/1
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Australia