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Cheap flights from Seattle to Perth from $766

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 21/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Seattle to Perth (SEA-PER)

Cheap return flights

Cathay Pacific Logo
15:23 - 22:40SEA-PER
40h 17m2 stops
Cathay Pacific Logo
00:10 - 21:58PER-SEA
36h 48m2 stops
$1,683Cathay Pacific
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Wed, 3 Sep - Tue, 9 Sep
Singapore Airlines Logo
10:15 - 14:40SEA-PER
37h 25m1 stop
Singapore Airlines Logo
01:10 - 07:10PER-SEA
22h 00m1 stop
$1,718Singapore Airlines
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Tue, 16 Sep - Mon, 10 Nov
Singapore Airlines Logo
10:15 - 14:40SEA-PER
37h 25m1 stop
Singapore Airlines Logo
01:10 - 07:10PER-SEA
22h 00m1 stop
$1,720Singapore Airlines
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Tue, 16 Sep - Mon, 10 Nov
Cathay Pacific Logo
19:59 - 07:45SEA-PER
44h 46m2 stops
Cathay Pacific Logo
00:10 - 09:57PER-SEA
48h 47m2 stops
$1,761Cathay Pacific
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Sun, 31 Aug - Fri, 12 Sep
Logo
19:15 - 15:45SEA-PER
29h 30m2 stops
Logo
13:15 - 09:22PER-SEA
35h 07m2 stops
$1,885
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Sun, 31 Aug - Sat, 13 Sep
Logo
01:40 - 04:30SEA-PER
35h 50m3 stops
Logo
05:10 - 19:20PER-SEA
29h 10m3 stops
$1,890
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Sun, 7 Sep - Mon, 22 Sep
Qantas Airways Logo
17:59 - 17:05SEA-PER
32h 06m2 stops
Qantas Airways Logo
11:25 - 13:02PER-SEA
41h 37m2 stops
$1,944Qantas Airways
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Tue, 16 Sep - Tue, 11 Nov
Qantas Airways Logo
16:59 - 13:35SEA-PER
29h 36m2 stops
Qantas Airways Logo
12:25 - 23:42PER-SEA
26h 17m2 stops
$1,946Qantas Airways
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Fri, 12 Sep - Tue, 23 Sep
Qatar Airways Logo
16:30 - 11:55SEA-PER
28h 25m1 stop
Qatar Airways Logo
22:45 - 12:45PER-SEA
29h 00m1 stop
$1,955Qatar Airways
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Mon, 8 Sep - Mon, 22 Sep
Qatar Airways Logo
16:30 - 11:55SEA-PER
28h 25m1 stop
Qatar Airways Logo
15:55 - 12:45PER-SEA
35h 50m1 stop
$1,958Qatar Airways
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Wed, 3 Sep - Wed, 10 Sep

Cathay Pacific flights from Seattle to Perth

Our best Cathay Pacific deals on Seattle to Perth flight tickets
Cathay Pacific
3 Sept
SEA15:23Seattle/Tacoma Intl
40h 17m
2 stops
PER22:40Perth
9 Sept
PER00:10Perth
36h 48m
2 stops
SEA21:58Seattle/Tacoma Intl
$1,683
Find similar
Cathay Pacific
31 Aug
SEA19:59Seattle/Tacoma Intl
44h 46m
2 stops
PER07:45Perth
12 Sept
PER00:10Perth
48h 47m
2 stops
SEA09:57Seattle/Tacoma Intl
$1,761
Find similar
Cathay Pacific
8 Sept
SEA11:37Seattle/Tacoma Intl
29h 08m
2 stops
PER07:45Perth
21 Sept
PER00:10Perth
29h 49m
2 stops
SEA14:59Seattle/Tacoma Intl
$2,137
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Qantas Airways flights from Seattle to Perth

Our best Qantas Airways deals on Seattle to Perth flight tickets
Qantas Airways
16 Sept
SEA17:59Seattle/Tacoma Intl
32h 06m
2 stops
PER17:05Perth
11 Nov
PER11:25Perth
41h 37m
2 stops
SEA13:02Seattle/Tacoma Intl
$1,944
Find similar
Qantas Airways
12 Sept
SEA16:59Seattle/Tacoma Intl
29h 36m
2 stops
PER13:35Perth
23 Sept
PER12:25Perth
26h 17m
2 stops
SEA23:42Seattle/Tacoma Intl
$1,946
Find similar
Qantas Airways
31 Aug
SEA14:32Seattle/Tacoma Intl
32h 03m
2 stops
PER13:35Perth
13 Sept
PER10:30Perth
24h 54m
2 stops
SEA20:24Seattle/Tacoma Intl
$1,959
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momondo Fare Finder

 
Customise 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 78,305 searches. Data last updated 6 August 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

Wed 3/9

15:23-22:40

2 stops40h 17m

Perth

Tue 9/9

00:10-21:58

2 stops36h 48m

$1,683

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 16/9

10:15-14:40

1 stop37h 25m

Perth

Mon 10/11

01:10-07:10

1 stop22h 00m

$1,718

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 16/9

10:15-14:40

1 stop37h 25m

Perth

Mon 10/11

01:10-07:10

1 stop22h 00m

$1,720

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sun 31/8

19:59-07:45

2 stops44h 46m

Perth

Fri 12/9

00:10-09:57

2 stops48h 47m

$1,761

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sun 31/8

19:15-15:45

2 stops29h 30m

Perth

Sat 13/9

13:15-09:22

2 stops35h 07m

$1,885

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sun 7/9

01:40-04:30

3 stops35h 50m

Perth

Mon 22/9

05:10-19:20

3 stops29h 10m

$1,890

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 16/9

17:59-17:05

2 stops32h 06m

Perth

Tue 11/11

11:25-13:02

2 stops41h 37m

$1,944

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Fri 12/9

16:59-13:35

2 stops29h 36m

Perth

Tue 23/9

12:25-23:42

2 stops26h 17m

$1,946

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Mon 8/9

16:30-11:55

1 stop28h 25m

Perth

Mon 22/9

22:45-12:45

1 stop29h 00m

$1,955

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Wed 3/9

16:30-11:55

1 stop28h 25m

Perth

Wed 10/9

15:55-12:45

1 stop35h 50m

$1,958

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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?

The month of February is, on average, the cheapest month to fly to Perth from Seattle, with most prices found around $2,027. If you’re not able to fly to Perth in February, then October is your next best option. Flight prices from Seattle to Perth during October average around $2,221.

How far in advance should I book a flight to Perth?

You are more likely to see cheaper flights to Perth from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Perth for around $2,373 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Perth from Seattle for as low as $1,799 on momondo.

Can stopping save me money on Seattle to Perth flights?

You could potentially save up to 18% 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 return 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

$766

Fastest flight time

27h 15m

Direct flights

None

Airports in Perth

1 airport
The best one-way flight to Perth from Seattle in the past 72 hours is $766. The best return flight deal from Seattle to Perth found on momondo in the last 72 hours is $1,683.
The fastest flight from Seattle to Perth takes 27h 15m
There are no direct flights from Seattle to Perth. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - Perth Airport.
There is 1 airport near Perth: Perth (PER)
Search flight deals

  • How far is Seattle/Tacoma Intl to Perth by plane?

    A flight from Seattle/Tacoma Intl to Perth will travel around 14868.9 km. Flights usually cover this in 27h 15m, depending on flying conditions and air traffic around both airports.

  • 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 refresh daily.

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Perth Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. 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 necessary travel and health documents for your Perth Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Travelling to a place near Perth?

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

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Perth?

Finding the right flight to Perth from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Perth quick and easy, saving you time and money.

Can I find flights from Seattle to Perth with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Perth from Seattle with this policy.

How can momondo help me find flights from Seattle to Perth?

momondo helps you find the best flight between Seattle and Perth by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Seattle to Perth right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Perth, momondo offers a useful price alert feature which will track prices for flights to Perth from Seattle and alert you when they change.

An easier way to manage your Perth trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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