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

Alaska Airlines, American Airlines, and United Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Australia

What airlines fly to Australia?

Air Canada, United Airlines and Qantas Airways are the top three most popular airlines that fly to Australia from Seattle according to our data. Air Canada is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Australia. Keep in mind that there are 11 different airlines that fly to Australia 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 Australia?

Prices for flights from Seattle/Tacoma Intl Airport to Australia are refreshed on a daily basis.

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Australia?

As of November 2026, there are 10 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Australia.

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

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 layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Australia.

What documentation or ID do you need to fly to Australia?

The travel and health documents required for your trip to Australia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Australia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$482 Cheap Flights from Seattle to Australia in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Australia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:30 pm - 9:50 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

41h 20m1 stop Manila Ninoy Aquino Intl

11:30 am - 7:45 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

26h 15m1 stop Manila Ninoy Aquino Intl

$966Philippine Airlines

Mon, Mar 8 - Wed, Mar 17

11:55 pm - 9:45 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

40h 50m1 stop Manila Ninoy Aquino Intl

11:35 am - 7:35 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

25h 00m1 stop Manila Ninoy Aquino Intl

$987Philippine Airlines

Sun, Apr 11 - Sun, Apr 25

8:15 am - 5:50 amSEA Seattle/Tacoma Intl-BNE Brisbane

27h 35m1 stop Los Angeles

1:05 pm - 4:27 pmBNE Brisbane-SEA Seattle/Tacoma Intl

20h 22m1 stop Los Angeles

$1,091Alaska Airlines

Sun, Feb 7 - Sun, May 9

2:22 pm - 5:50 amSEA Seattle/Tacoma Intl-BNE Brisbane

21h 28m1 stop Los Angeles

1:10 pm - 9:05 pmBNE Brisbane-SEA Seattle/Tacoma Intl

25h 55m1 stop Los Angeles

$1,092Alaska Airlines

Fri, Feb 5 - Sun, Feb 14

2:55 pm - 8:45 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

24h 50m2 stops Vancouver Intl Auckland Intl

11:55 am - 6:30 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

23h 35m2 stops Auckland Intl Vancouver Intl

$1,092Air New Zealand

Sat, May 1 - Mon, May 17

3:15 pm - 10:55 amSEA Seattle/Tacoma Intl-MEL Melbourne

26h 40m2 stops Vancouver Intl Auckland Intl

8:35 am - 6:42 pmMEL Melbourne-SEA Seattle/Tacoma Intl

27h 07m2 stops Auckland Intl Los Angeles

$1,129Air New Zealand

Fri, Apr 30 - Wed, May 19

8:40 am - 12:05 amSEA Seattle/Tacoma Intl-PER Perth

47h 25m1 stop Singapore Changi

1:20 am - 8:05 amPER Perth-SEA Seattle/Tacoma Intl

21h 45m1 stop Singapore Changi

$1,153Singapore Airlines

Wed, Mar 3 - Tue, Mar 16

3:40 pm - 6:25 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

20h 45m1 stop Los Angeles

9:10 am - 2:27 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

22h 17m1 stop Los Angeles

$1,178Qantas Airways

Wed, Mar 24 - Wed, Apr 21

6:55 pm - 9:00 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

20h 05m1 stop Los Angeles

9:10 am - 2:27 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

22h 17m1 stop Los Angeles

$1,178Qantas Airways

Wed, Mar 24 - Wed, Apr 21

10:15 am - 12:30 pmSEA Seattle/Tacoma Intl-PER Perth

59h 15m1 stop Singapore Changi

4:55 pm - 8:45 amPER Perth-SEA Seattle/Tacoma Intl

30h 50m1 stop Singapore Changi

$1,189Singapore Airlines

Sun, May 2 - Wed, May 5

Cheap last minute flights

Enter your travel dates to find the best prices.

9:30 pm - 9:50 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

41h 20m1 stop Manila Ninoy Aquino Intl

11:30 am - 6:45 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

26h 15m1 stop Manila Ninoy Aquino Intl

$1,076Philippine Airlines

Mon, Nov 9 - Wed, Nov 18

9:30 pm - 9:50 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

41h 20m1 stop Manila Ninoy Aquino Intl

11:30 am - 6:45 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

26h 15m1 stop Manila Ninoy Aquino Intl

$1,113Philippine Airlines

Sun, Nov 8 - Fri, Nov 20

5:59 pm - 9:00 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

20h 01m1 stop Los Angeles

11:10 am - 11:03 amSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

18h 53m1 stop Los Angeles

$1,194Qantas Airways

Sun, Nov 8 - Mon, Nov 23

12:31 pm - 8:30 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

24h 59m1 stop Los Angeles

10:40 am - 11:53 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

32h 13m1 stop Los Angeles

$1,210Delta

Wed, Nov 11 - Mon, Nov 30

5:35 am - 8:30 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

31h 55m2 stops Salt Lake City Los Angeles

10:40 am - 11:53 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

32h 13m1 stop Los Angeles

$1,215Delta

Wed, Nov 11 - Mon, Nov 30

3:59 pm - 9:00 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

22h 01m1 stop Los Angeles

11:10 am - 12:20 amSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

32h 10m1 stop Los Angeles

$1,223Qantas Airways

Wed, Nov 11 - Mon, Nov 30

1:35 pm - 6:25 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

21h 50m1 stop Los Angeles

11:10 am - 4:07 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

23h 57m1 stop Los Angeles

$1,228American Airlines

Sun, Nov 8 - Mon, Nov 23

3:00 pm - 9:00 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

23h 00m2 stops Phoenix Sky Harbor Intl Los Angeles

11:15 am - 1:08 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

20h 53m1 stop Los Angeles

$1,235American Airlines

Sun, Nov 8 - Mon, Nov 23

12:28 pm - 9:05 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

25h 37m1 stop Los Angeles

9:15 am - 7:17 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

29h 02m1 stop Houston George Bush Intcntl

$1,247United Airlines

Sun, Nov 8 - Wed, Nov 25

7:35 pm - 9:20 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

18h 45m1 stop San Francisco

9:15 am - 1:25 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

23h 10m1 stop Houston George Bush Intcntl

$1,247United Airlines

Mon, Nov 9 - Mon, Nov 23

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Philippine Airlines flights from Seattle to Australia

Our best Philippine Airlines deals on Seattle to Australia flight tickets

Philippine Airlines

Mar 8

SEA9:30 pmSeattle/Tacoma Intl

41h 20m

1 stop

SYD9:50 amSydney Kingsford Smith

Mar 17

SYD11:30 amSydney Kingsford Smith

26h 15m

1 stop

SEA7:45 pmSeattle/Tacoma Intl

$966

Philippine Airlines

Apr 11

SEA11:55 pmSeattle/Tacoma Intl

40h 50m

1 stop

SYD9:45 amSydney Kingsford Smith

Apr 25

SYD11:35 amSydney Kingsford Smith

25h 00m

1 stop

SEA7:35 pmSeattle/Tacoma Intl

$987

Philippine Airlines

Feb 22

SEA9:30 pmSeattle/Tacoma Intl

41h 20m

1 stop

SYD9:50 amSydney Kingsford Smith

Mar 3

SYD11:30 amSydney Kingsford Smith

26h 15m

1 stop

SEA6:45 pmSeattle/Tacoma Intl

$991

Air New Zealand flights from Seattle to Australia

Our best Air New Zealand deals on Seattle to Australia flight tickets

Air New Zealand

May 1

SEA2:55 pmSeattle/Tacoma Intl

24h 50m

2 stops

SYD8:45 amSydney Kingsford Smith

May 17

SYD11:55 amSydney Kingsford Smith

23h 35m

2 stops

SEA6:30 pmSeattle/Tacoma Intl

$1,092

Air New Zealand

Apr 30

SEA3:15 pmSeattle/Tacoma Intl

26h 40m

2 stops

MEL10:55 amMelbourne

May 19

MEL8:35 amMelbourne

27h 07m

2 stops

SEA6:42 pmSeattle/Tacoma Intl

$1,129

Air New Zealand

Mar 2

SEA7:41 pmSeattle/Tacoma Intl

42h 14m

2 stops

MEL8:55 amMelbourne

Mar 6

MEL7:10 pmMelbourne

39h 48m

2 stops

SEA3:58 pmSeattle/Tacoma Intl

$1,285

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Mon 3/8

9:30 pm-9:50 am

1 stop41h 20m

Sydney Kingsford Smith

Wed 3/17

11:30 am-7:45 pm

1 stop26h 15m

$966

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sun 4/11

11:55 pm-9:45 am

1 stop40h 50m

Sydney Kingsford Smith

Sun 4/25

11:35 am-7:35 pm

1 stop25h 00m

$987

SeattleBrisbane

SEA Seattle/Tacoma Intl - BNE Brisbane

SEABNE

Seattle/Tacoma Intl

Sun 2/7

8:15 am-5:50 am

1 stop27h 35m

Brisbane

Sun 5/9

1:05 pm-4:27 pm

1 stop20h 22m

$1,091

SeattleBrisbane

SEA Seattle/Tacoma Intl - BNE Brisbane

SEABNE

Seattle/Tacoma Intl

Fri 2/5

2:22 pm-5:50 am

1 stop21h 28m

Brisbane

Sun 2/14

1:10 pm-9:05 pm

1 stop25h 55m

$1,092

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sat 5/1

2:55 pm-8:45 am

2 stops24h 50m

Sydney Kingsford Smith

Mon 5/17

11:55 am-6:30 pm

2 stops23h 35m

$1,092

SeattleMelbourne

SEA Seattle/Tacoma Intl - MEL Melbourne

SEAMEL

Seattle/Tacoma Intl

Fri 4/30

3:15 pm-10:55 am

2 stops26h 40m

Melbourne

Wed 5/19

8:35 am-6:42 pm

2 stops27h 07m

$1,129

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Wed 3/3

8:40 am-12:05 am

1 stop47h 25m

Perth

Tue 3/16

1:20 am-8:05 am

1 stop21h 45m

$1,153

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 3/24

3:40 pm-6:25 am

1 stop20h 45m

Sydney Kingsford Smith

Wed 4/21

9:10 am-2:27 pm

1 stop22h 17m

$1,178

Quickest round-trip

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 3/24

6:55 pm-9:00 am

1 stop20h 05m

Sydney Kingsford Smith

Wed 4/21

9:10 am-2:27 pm

1 stop22h 17m

$1,178

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Sun 5/2

10:15 am-12:30 pm

1 stop59h 15m

Perth

Wed 5/5

4:55 pm-8:45 am

1 stop30h 50m

$1,189

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Seattle to Australia

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 Australia?

The month of February is, on average, the cheapest month to fly to Australia from Seattle, with most prices found around $1,059. If you aren’t able to travel during the month of February, then book flights to Australia from Seattle during April instead. Flights to Australia in April, while not as cheap as those in February, still average around $1,110.

How far in advance should I book a flight from Seattle to Australia?

You are more likely to see cheaper flights to Australia from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Australia for around $1,207 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Australia from Seattle for as low as $1,021 on momondo.

Can stopping save me money on Seattle to Australia flights?

You could potentially save up to 14% on your flight if you consider stops on a Seattle to Australia flight.

Cheap Seattle to Australia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Australia

Best Price Found	$482
Fastest flight time	18h 00m
Direct flights	None

The best one-way flight to Australia from Seattle in the past 72 hours is $482. The best round-trip flight deal from Seattle to Australia found on momondo in the last 72 hours is $966.

The fastest flight from Seattle to Australia takes 18h 00m

There are no direct flights from Seattle to Australia. There are no popular flight routes from Seattle to Australia.

Search flight deals

Frequently asked questions about flying from Seattle to Australia

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Australia?
Prices for flights from Seattle/Tacoma Intl Airport to Australia are refreshed on a daily basis.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Australia?
As of November 2026, there are 10 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Australia.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Australia?
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 layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Australia.
What documentation or ID do you need to fly to Australia?
The travel and health documents required for your trip to Australia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Australia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Seattle to Australia

Compare and see reviews for airlines that fly from Seattle to Australia with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $570	Free Cancellation	Rating 7.8 8,698 reviews	Search Delta flights
Air Canada	PriceFrom $796	Free Cancellation	Rating 7.1 11,874 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $819	Free Cancellation	Rating 7.5 1,123 reviews	Search Qantas Airways flights
United Airlines	PriceFrom $888	Free Cancellation	Rating 7.3 10,469 reviews	Search United Airlines flights
Air New Zealand	PriceFrom $947	Free Cancellation	Rating 8.0 683 reviews	Search Air New Zealand flights
American Airlines	PriceFrom $975	Free Cancellation	Rating 7.0 12,229 reviews	Search American Airlines flights
ANA	PriceFrom $1,001	Free Cancellation	Rating 8.3 1,339 reviews	Search ANA flights
Alaska Airlines	PriceFrom $1,091	Free Cancellation	Rating 7.9 13,155 reviews	Search Alaska Airlines flights
Cathay Pacific	PriceFrom $1,153	Free Cancellation	Rating 7.6 1,539 reviews	Search Cathay Pacific flights
Singapore Airlines	PriceFrom $1,232	Free Cancellation	Rating 8.2 1,632 reviews	Search Singapore Airlines flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Australia. Millions of users trust and use momondo every year so you are in good hands.

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

All flight searches from Seattle to Australia on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Seattle and Australia 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 Australia right now. Can momondo alert me if prices change?

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