What airlines fly to Australia?

United Airlines, Air Canada and Qantas Airways are the top three most popular airlines that fly to Australia from Seattle according to our data. United Airlines is the first choice among our users, with 37% 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.

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

American Airlines, United Airlines, and Delta are the most popular carriers operating from Seattle/Tacoma Intl 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 June 2026, there are 11 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

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.

11:55 pm - 9:45 am

SEA

SYD

38h 50m

1 stop

11:35 am - 7:35 pm

SYD

SEA

27h 00m

1 stop

$994Philippine Airlines

Thu, Nov 26 - Wed, Dec 9

7:05 pm - 9:35 am

SEA

SYD

19h 30m

1 stop

11:20 am - 9:17 am

SYD

SEA

16h 57m

1 stop

$1,030Air Canada

Wed, Nov 4 - Mon, Nov 30

4:59 pm - 5:00 am

SEA

BNE

19h 01m

1 stop

8:35 pm - 10:57 pm

BNE

SEA

19h 22m

1 stop

$1,060Qantas Airways

Tue, Sep 29 - Tue, Oct 13

2:20 pm - 6:45 am

SEA

MEL

23h 25m

1 stop

1:35 pm - 8:05 pm

MEL

SEA

23h 30m

1 stop

$1,072American Airlines

Sat, Jul 25 - Sat, Aug 1

2:40 pm - 6:45 am

SEA

MEL

23h 05m

1 stop

9:45 am - 1:48 pm

MEL

SEA

21h 03m

1 stop

$1,079American Airlines

Wed, Jul 1 - Thu, Jul 9

5:20 pm - 8:15 am

SEA

MEL

21h 55m

1 stop

10:55 am - 12:34 pm

MEL

SEA

18h 39m

1 stop

$1,090United Airlines

Tue, Jun 30 - Thu, Jul 30

3:33 pm - 8:15 am

SEA

MEL

23h 42m

1 stop

10:55 am - 2:30 pm

MEL

SEA

20h 35m

1 stop

$1,091United Airlines

Fri, Jul 3 - Tue, Aug 4

12:35 pm - 7:50 am

SEA

MEL

26h 15m

1 stop

10:00 am - 4:40 pm

MEL

SEA

23h 40m

1 stop

$1,098Delta

Fri, Jul 24 - Fri, Jul 31

7:15 am - 7:50 am

SEA

MEL

31h 35m

2 stops

10:00 am - 12:30 pm

MEL

SEA

19h 30m

1 stop

$1,103Delta

Mon, Jun 29 - Sun, Aug 2

4:59 pm - 5:00 am

SEA

BNE

19h 01m

1 stop

3:00 pm - 11:03 pm

BNE

SEA

25h 03m

2 stops

$1,158Qantas Airways

Tue, Sep 29 - Tue, Oct 13

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Air Canada flights from Seattle to Australia

Our best Air Canada deals on Seattle to Australia flight tickets

Air Canada

Nov 4

SEA7:05 pmSeattle/Tacoma Intl

19h 30m

1 stop

SYD9:35 amSydney Kingsford Smith

Nov 30

SYD11:20 amSydney Kingsford Smith

16h 57m

1 stop

SEA9:17 amSeattle/Tacoma Intl

$1,030

Air Canada

Jul 27

SEA7:20 pmSeattle/Tacoma Intl

19h 00m

1 stop

SYD7:20 amSydney Kingsford Smith

Aug 9

SYD9:20 amSydney Kingsford Smith

22h 02m

1 stop

SEA2:22 pmSeattle/Tacoma Intl

$1,041

Air Canada

Jul 27

SEA5:45 amSeattle/Tacoma Intl

32h 35m

1 stop

SYD7:20 amSydney Kingsford Smith

Aug 3

SYD9:20 amSydney Kingsford Smith

30h 22m

1 stop

SEA10:42 pmSeattle/Tacoma Intl

$1,043

Air New Zealand flights from Seattle to Australia

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

Air New Zealand

Nov 11

SEA10:10 amSeattle/Tacoma Intl

28h 25m

1 stop

SYD9:35 amSydney Kingsford Smith

Nov 30

SYD11:20 amSydney Kingsford Smith

29h 37m

1 stop

SEA9:57 pmSeattle/Tacoma Intl

$1,058

Air New Zealand

Sep 30

SEA7:20 pmSeattle/Tacoma Intl

19h 00m

1 stop

SYD7:20 amSydney Kingsford Smith

Oct 10

SYD11:00 amSydney Kingsford Smith

40h 52m

2 stops

SEA9:52 amSeattle/Tacoma Intl

$1,080

Air New Zealand

Jun 16

SEA3:00 pmSeattle/Tacoma Intl

23h 20m

1 stop

SYD7:20 amSydney Kingsford Smith

Jul 31

SYD9:20 amSydney Kingsford Smith

17h 47m

1 stop

SEA10:07 amSeattle/Tacoma Intl

$1,151

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 11/26

11:55 pm-9:45 am

1 stop38h 50m

Sydney Kingsford Smith

Wed 12/9

11:35 am-7:35 pm

1 stop27h 00m

$994

Quickest round-trip

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 11/4

7:05 pm-9:35 am

1 stop19h 30m

Sydney Kingsford Smith

Mon 11/30

11:20 am-9:17 am

1 stop16h 57m

$1,030

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 9/29

4:59 pm-5:00 am

1 stop19h 01m

Brisbane

Tue 10/13

8:35 pm-10:57 pm

1 stop19h 22m

$1,060

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sat 7/25

2:20 pm-6:45 am

1 stop23h 25m

Melbourne

Sat 8/1

1:35 pm-8:05 pm

1 stop23h 30m

$1,072

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Wed 7/1

2:40 pm-6:45 am

1 stop23h 05m

Melbourne

Thu 7/9

9:45 am-1:48 pm

1 stop21h 03m

$1,079

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Tue 6/30

5:20 pm-8:15 am

1 stop21h 55m

Melbourne

Thu 7/30

10:55 am-12:34 pm

1 stop18h 39m

$1,090

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Fri 7/3

3:33 pm-8:15 am

1 stop23h 42m

Melbourne

Tue 8/4

10:55 am-2:30 pm

1 stop20h 35m

$1,091

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Fri 7/24

12:35 pm-7:50 am

1 stop26h 15m

Melbourne

Fri 7/31

10:00 am-4:40 pm

1 stop23h 40m

$1,098

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Mon 6/29

7:15 am-7:50 am

2 stops31h 35m

Melbourne

Sun 8/2

10:00 am-12:30 pm

1 stop19h 30m

$1,103

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 9/29

4:59 pm-5:00 am

1 stop19h 01m

Brisbane

Tue 10/13

3:00 pm-11:03 pm

2 stops25h 03m

$1,158

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 January is, on average, the cheapest month to fly to Australia from Seattle, with most prices found around $97. If you aren’t able to travel during the month of January, then book flights to Australia from Seattle during February instead. Flights to Australia in February, while not as cheap as those in January, still average around $142.

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 $1,061 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 $923 on momondo.

Can stopping save me money on Seattle to Australia flights?

You could potentially save up to 27% 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

Fastest flight time	18h 21m
Direct flights	None

The fastest flight from Seattle to Australia takes 18h 21m

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 June 2026, there are 11 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
Alaska Airlines	PriceFrom $97	Free Cancellation	Rating 7.9 12,508 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $385	Free Cancellation	Rating 7.1 11,193 reviews	Search Air Canada flights
ANA	PriceFrom $583	Free Cancellation	Rating 8.3 1,236 reviews	Search ANA flights
Qantas Airways	PriceFrom $789	Free Cancellation	Rating 7.5 1,046 reviews	Search Qantas Airways flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.1 11,662 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $813	Free Cancellation	Rating 7.8 2,829 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $831	Free Cancellation	Rating 7.4 9,826 reviews	Search United Airlines flights
Delta	PriceFrom $842	Free Cancellation	Rating 7.9 8,398 reviews	Search Delta flights
Air New Zealand	PriceFrom $947	Free Cancellation	Rating 8.0 645 reviews	Search Air New Zealand flights
Cathay Pacific	PriceFrom $1,153	Free Cancellation	Rating 7.6 1,379 reviews	Search Cathay Pacific 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.