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

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.

$903 Cheap Flights from Seattle to Perth in 2025/26

1 adult

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Find the cheapest flights from Seattle to Perth

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10:15 - 23:55

SEA

PER

22h 40m1 stop

01:10 - 08:45

PER

SEA

22h 35m1 stop

$1,648Singapore Airlines

Tue, 7 Apr - Mon, 27 Apr

10:15 - 23:55

SEA

PER

22h 40m1 stop

01:10 - 08:45

PER

SEA

22h 35m1 stop

$1,658Singapore Airlines

Tue, 7 Apr - Mon, 27 Apr

10:15 - 12:30

SEA

PER

35h 15m1 stop

01:10 - 16:54

PER

SEA

30h 44m2 stops

$1,787Multiple Airlines

Tue, 7 Apr - Mon, 27 Apr

19:55 - 07:45

SEA

PER

44h 50m2 stops

00:10 - 07:08

PER

SEA

45h 58m2 stops

$1,858Cathay Pacific

Tue, 7 Apr - Mon, 27 Apr

16:05 - 18:45

SEA

PER

34h 40m1 stop

22:45 - 11:40

PER

SEA

28h 55m1 stop

$1,925Qatar Airways

Tue, 3 Feb - Tue, 24 Feb

16:05 - 18:45

SEA

PER

34h 40m1 stop

15:55 - 11:40

PER

SEA

35h 45m1 stop

$1,954Qatar Airways

Tue, 3 Feb - Wed, 25 Feb

08:45 - 04:15

SEA

PER

27h 30m1 stop

14:35 - 08:00

PER

SEA

33h 25m2 stops

$1,962Multiple Airlines

Sun, 1 Feb - Fri, 27 Feb

17:59 - 22:55

SEA

PER

36h 56m2 stops

08:30 - 21:58

PER

SEA

29h 28m2 stops

$1,968Cathay Pacific

Mon, 26 Jan - Mon, 2 Feb

08:25 - 18:45

SEA

PER

42h 20m2 stops

22:45 - 11:40

PER

SEA

28h 55m1 stop

$1,977Qatar Airways

Tue, 3 Feb - Tue, 24 Feb

08:45 - 04:15

SEA

PER

27h 30m1 stop

14:35 - 18:10

PER

SEA

43h 35m2 stops

$1,983Multiple Airlines

Sun, 1 Feb - Mon, 23 Feb

Cathay Pacific flights from Seattle to Perth

Our best Cathay Pacific deals on Seattle to Perth flight tickets

Cathay Pacific

7 Apr

SEA19:55Seattle/Tacoma Intl

44h 50m

2 stops

PER07:45Perth

27 Apr

PER00:10Perth

25h 00m

1 stop

SEA10:10Seattle/Tacoma Intl

$1,835

Find similar

Cathay Pacific

7 Apr

SEA19:55Seattle/Tacoma Intl

44h 50m

2 stops

PER07:45Perth

27 Apr

PER00:10Perth

45h 58m

2 stops

SEA07:08Seattle/Tacoma Intl

$1,858

Find similar

Cathay Pacific

7 Apr

SEA11:55Seattle/Tacoma Intl

52h 50m

2 stops

PER07:45Perth

27 Apr

PER00:10Perth

45h 58m

2 stops

SEA07:08Seattle/Tacoma Intl

$1,913

Find similar

Qatar Airways flights from Seattle to Perth

Our best Qatar Airways deals on Seattle to Perth flight tickets

Qatar Airways

3 Feb

SEA16:05Seattle/Tacoma Intl

34h 40m

1 stop

PER18:45Perth

24 Feb

PER22:45Perth

28h 55m

1 stop

SEA11:40Seattle/Tacoma Intl

$1,925

Find similar

Qatar Airways

3 Feb

SEA16:05Seattle/Tacoma Intl

34h 40m

1 stop

PER18:45Perth

25 Feb

PER15:55Perth

35h 45m

1 stop

SEA11:40Seattle/Tacoma Intl

$1,954

Find similar

Qatar Airways

3 Feb

SEA08:25Seattle/Tacoma Intl

42h 20m

2 stops

PER18:45Perth

24 Feb

PER22:45Perth

28h 55m

1 stop

SEA11:40Seattle/Tacoma Intl

$1,977

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 7/4

10:15-23:55

1 stop22h 40m

Perth

Mon 27/4

01:10-08:45

1 stop22h 35m

$1,648

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 7/4

10:15-23:55

1 stop22h 40m

Perth

Mon 27/4

01:10-08:45

1 stop22h 35m

$1,658

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 7/4

10:15-12:30

1 stop35h 15m

Perth

Mon 27/4

01:10-16:54

2 stops30h 44m

$1,787

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 7/4

19:55-07:45

2 stops44h 50m

Perth

Mon 27/4

00:10-07:08

2 stops45h 58m

$1,858

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 3/2

16:05-18:45

1 stop34h 40m

Perth

Tue 24/2

22:45-11:40

1 stop28h 55m

$1,925

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 3/2

16:05-18:45

1 stop34h 40m

Perth

Wed 25/2

15:55-11:40

1 stop35h 45m

$1,954

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sun 1/2

08:45-04:15

1 stop27h 30m

Perth

Fri 27/2

14:35-08:00

2 stops33h 25m

$1,962

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Mon 26/1

17:59-22:55

2 stops36h 56m

Perth

Mon 2/2

08:30-21:58

2 stops29h 28m

$1,968

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 3/2

08:25-18:45

2 stops42h 20m

Perth

Tue 24/2

22:45-11:40

1 stop28h 55m

$1,977

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sun 1/2

08:45-04:15

1 stop27h 30m

Perth

Mon 23/2

14:35-18:10

2 stops43h 35m

$1,983

Flights are sorted by cheapest return flights first.

Showing 1-10 of 19 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?

The month of September is, on average, the cheapest month to fly to Perth from Seattle, with most prices found around $1,937. If you’re not able to fly to Perth in September, then February is your next best option. Flight prices from Seattle to Perth during February average around $1,963.

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

Fastest flight time	27h 55m
Direct flights	None

The fastest flight from Seattle to Perth takes 27h 55m

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?
A flight from Seattle/Tacoma Intl to Perth will travel around 14868.9 km. Flights usually cover this in 27h 55m, 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.

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.