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Cheap flights from Seattle to Perth from $477

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 3/8. 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

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Find the cheapest flights from Seattle to Perth

Cheap round-trip flights

Enter your travel dates to find the best prices.
Singapore Airlines Logo
8:45 am - 12:35 pmSEA-PER
35h 50m1 stop
Singapore Airlines Logo
5:05 pm - 8:10 amPER-SEA
30h 05m1 stop
$1,132Singapore Airlines
Find Deal
Tue, Feb 17 - Sat, Mar 14
Singapore Airlines Logo
8:45 am - 12:35 pmSEA-PER
35h 50m1 stop
Singapore Airlines Logo
1:15 am - 8:10 amPER-SEA
21h 55m1 stop
$1,143Singapore Airlines
Find Deal
Tue, Feb 17 - Fri, Mar 13
Cathay Pacific Logo
11:50 am - 7:45 amSEA-PER
28h 55m1 stop
Cathay Pacific Logo
9:15 am - 10:10 amPER-SEA
39h 55m1 stop
$1,168Cathay Pacific
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Mon, Apr 20 - Mon, May 4
Cathay Pacific Logo
11:50 am - 10:40 pmSEA-PER
43h 50m1 stop
Cathay Pacific Logo
12:10 am - 10:10 amPER-SEA
25h 00m1 stop
$1,187Cathay Pacific
Find Deal
Mon, Apr 20 - Sun, May 3
Multiple Airlines Logo
9:30 pm - 4:15 amSEA-PER
38h 45m2 stops
Multiple Airlines Logo
5:35 am - 6:40 pmPER-SEA
29h 05m2 stops
$1,200Multiple Airlines
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Wed, Nov 12 - Tue, Dec 2
Cathay Pacific Logo
11:50 am - 7:45 amSEA-PER
28h 55m1 stop
Cathay Pacific Logo
12:10 am - 6:40 pmPER-SEA
33h 30m2 stops
$1,210Cathay Pacific
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Mon, Apr 20 - Sun, May 3
Multiple Airlines Logo
8:45 am - 12:35 pmSEA-PER
35h 50m1 stop
Multiple Airlines Logo
1:15 am - 1:52 pmPER-SEA
27h 37m2 stops
$1,235Multiple Airlines
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Tue, Feb 17 - Fri, Mar 13
Qantas Airways Logo
3:35 pm - 12:25 pmSEA-PER
28h 50m2 stops
Qantas Airways Logo
8:00 am - 6:49 pmPER-SEA
25h 49m2 stops
$1,309Qantas Airways
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Tue, Feb 17 - Sat, Mar 14
Qatar Airways Logo
8:05 am - 11:55 amSEA-PER
35h 50m2 stops
Qatar Airways Logo
3:55 pm - 12:40 pmPER-SEA
35h 45m1 stop
$1,364Qatar Airways
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Tue, Feb 17 - Sat, Mar 14
Qatar Airways Logo
4:30 pm - 11:55 amSEA-PER
28h 25m1 stop
Qatar Airways Logo
3:40 pm - 12:45 pmPER-SEA
36h 05m1 stop
$1,410Qatar Airways
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Sun, Apr 19 - Thu, Apr 23

Qatar Airways flights from Seattle to Perth

Our best Qatar Airways deals on Seattle to Perth flight tickets
Qatar Airways
Feb 17
SEA8:05 amSeattle/Tacoma Intl
35h 50m
2 stops
PER11:55 amPerth
Mar 14
PER3:55 pmPerth
35h 45m
1 stop
SEA12:40 pmSeattle/Tacoma Intl
$1,364
Find similar
Qatar Airways
Apr 19
SEA4:30 pmSeattle/Tacoma Intl
28h 25m
1 stop
PER11:55 amPerth
Apr 23
PER3:40 pmPerth
36h 05m
1 stop
SEA12:45 pmSeattle/Tacoma Intl
$1,410
Find similar
Qatar Airways
Apr 19
SEA4:30 pmSeattle/Tacoma Intl
35h 10m
1 stop
PER6:40 pmPerth
Apr 23
PER3:40 pmPerth
36h 05m
1 stop
SEA12:45 pmSeattle/Tacoma Intl
$1,414
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Singapore Airlines flights from Seattle to Perth

Our best Singapore Airlines deals on Seattle to Perth flight tickets
Singapore Airlines
Feb 17
SEA8:45 amSeattle/Tacoma Intl
35h 50m
1 stop
PER12:35 pmPerth
Mar 14
PER5:05 pmPerth
30h 05m
1 stop
SEA8:10 amSeattle/Tacoma Intl
$1,132
Find similar
Singapore Airlines
Feb 17
SEA8:45 amSeattle/Tacoma Intl
35h 50m
1 stop
PER12:35 pmPerth
Mar 13
PER1:15 amPerth
21h 55m
1 stop
SEA8:10 amSeattle/Tacoma Intl
$1,143
Find similar
Singapore Airlines
Feb 17
SEA8:45 amSeattle/Tacoma Intl
35h 50m
1 stop
PER12:35 pmPerth
Mar 14
PER5:05 pmPerth
30h 05m
1 stop
SEA8:10 amSeattle/Tacoma Intl
$1,294
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 October 22, 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

Tue 2/17

8:45 am-12:35 pm

1 stop35h 50m

Perth

Sat 3/14

5:05 pm-8:10 am

1 stop30h 05m

$1,132

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 2/17

8:45 am-12:35 pm

1 stop35h 50m

Perth

Fri 3/13

1:15 am-8:10 am

1 stop21h 55m

$1,143

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Mon 4/20

11:50 am-7:45 am

1 stop28h 55m

Perth

Mon 5/4

9:15 am-10:10 am

1 stop39h 55m

$1,168

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Mon 4/20

11:50 am-10:40 pm

1 stop43h 50m

Perth

Sun 5/3

12:10 am-10:10 am

1 stop25h 00m

$1,187

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Wed 11/12

9:30 pm-4:15 am

2 stops38h 45m

Perth

Tue 12/2

5:35 am-6:40 pm

2 stops29h 05m

$1,200

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Mon 4/20

11:50 am-7:45 am

1 stop28h 55m

Perth

Sun 5/3

12:10 am-6:40 pm

2 stops33h 30m

$1,210

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 2/17

8:45 am-12:35 pm

1 stop35h 50m

Perth

Fri 3/13

1:15 am-1:52 pm

2 stops27h 37m

$1,235

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 2/17

3:35 pm-12:25 pm

2 stops28h 50m

Perth

Sat 3/14

8:00 am-6:49 pm

2 stops25h 49m

$1,309

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 2/17

8:05 am-11:55 am

2 stops35h 50m

Perth

Sat 3/14

3:55 pm-12:40 pm

1 stop35h 45m

$1,364

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sun 4/19

4:30 pm-11:55 am

1 stop28h 25m

Perth

Thu 4/23

3:40 pm-12:45 pm

1 stop36h 05m

$1,410

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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, 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 $1,315.

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 23% 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 October 2025, prices for Seattle to Perth flights are approximately 46% 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. 27h 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?

  • 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
Singapore AirlinesPriceFrom $1,239Free CancellationRating
8.1
1,384 reviews
Search Singapore Airlines flights
Qantas AirwaysPriceFrom $1,258Free CancellationRating
7.5
922 reviews
Search Qantas Airways flights
Qatar AirwaysPriceFrom $1,315Free CancellationRating
7.4
3,653 reviews
Search Qatar Airways flights

Traveling to a place near Perth?

Book flights to Perth if you plan to visit one of these locations
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.

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