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 12 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?

ANA, 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 May 2026, there are 12 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.

$538 Cheap Flights from Seattle to Australia in 2026

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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.

10:03 am - 6:45 am

SEA

MEL

27h 42m

1 stop

9:45 am - 9:39 pm

MEL

SEA

28h 54m

1 stop

$996Multiple Airlines

Sat, Aug 15 - Sat, Aug 29

6:03 am - 6:45 am

SEA

MEL

31h 42m

1 stop

9:45 am - 12:20 pm

MEL

SEA

19h 35m

1 stop

$1,004Multiple Airlines

Sun, Aug 9 - Sun, Aug 23

7:20 pm - 7:20 am

SEA

SYD

19h 00m

1 stop

9:20 am - 2:22 pm

SYD

SEA

22h 02m

1 stop

$1,045Air Canada

Tue, Jul 28 - Tue, Aug 11

5:45 am - 7:20 am

SEA

SYD

32h 35m

1 stop

9:20 am - 10:07 am

SYD

SEA

17h 47m

1 stop

$1,046Air Canada

Sun, Jul 5 - Sun, Jul 12

3:58 pm - 6:45 am

SEA

MEL

21h 47m

1 stop

9:45 am - 12:16 pm

MEL

SEA

20h 31m

1 stop

$1,070Qantas Airways

Fri, Sep 25 - Fri, Oct 23

5:10 pm - 6:45 am

SEA

MEL

20h 35m

1 stop

9:45 am - 10:59 pm

MEL

SEA

30h 14m

1 stop

$1,078Qantas Airways

Tue, Aug 11 - Fri, Aug 21

7:40 am - 5:00 am

SEA

MEL

27h 20m

1 stop

9:45 am - 12:25 pm

MEL

SEA

20h 40m

1 stop

$1,081American Airlines

Mon, Oct 5 - Tue, Oct 13

11:58 am - 6:45 am

SEA

MEL

24h 47m

2 stops

12:00 pm - 11:05 pm

MEL

SEA

30h 05m

1 stop

$1,086American Airlines

Sat, Oct 24 - Sat, Nov 14

5:20 pm - 1:15 pm

SEA

CBR

26h 55m

2 stops

8:10 am - 8:53 pm

CBR

SEA

29h 43m

2 stops

$1,361United Airlines

Tue, Jun 23 - Tue, Jun 30

5:20 pm - 1:15 pm

SEA

CBR

26h 55m

2 stops

6:50 pm - 9:10 pm

CBR

SEA

43h 20m

3 stops

$1,369United Airlines

Tue, Jun 23 - Tue, Jun 30

American Airlines flights from Seattle to Australia

Our best American Airlines deals on Seattle to Australia flight tickets

American Airlines

Jun 4

SEA2:40 pmSeattle/Tacoma Intl

23h 05m

1 stop

MEL6:45 amMelbourne

Jun 11

MEL9:45 amMelbourne

29h 04m

1 stop

SEA9:49 pmSeattle/Tacoma Intl

$1,081

American Airlines

Jun 4

SEA7:00 amSeattle/Tacoma Intl

30h 45m

1 stop

MEL6:45 amMelbourne

Jun 11

MEL2:30 pmMelbourne

24h 19m

2 stops

SEA9:49 pmSeattle/Tacoma Intl

$1,112

American Airlines

Aug 2

SEA2:20 pmSeattle/Tacoma Intl

24h 10m

1 stop

SYD7:30 amSydney Kingsford Smith

Aug 19

SYD12:00 pmSydney Kingsford Smith

23h 47m

1 stop

SEA6:47 pmSeattle/Tacoma Intl

$1,116

Air Canada flights from Seattle to Australia

Our best Air Canada deals on Seattle to Australia flight tickets

Air Canada

May 31

SEA7:20 pmSeattle/Tacoma Intl

19h 00m

1 stop

SYD7:20 amSydney Kingsford Smith

Jun 14

SYD9:20 amSydney Kingsford Smith

30h 20m

1 stop

SEA10:40 pmSeattle/Tacoma Intl

$997

Air Canada

Jul 28

SEA7:20 pmSeattle/Tacoma Intl

19h 00m

1 stop

SYD7:20 amSydney Kingsford Smith

Aug 11

SYD9:20 amSydney Kingsford Smith

22h 02m

1 stop

SEA2:22 pmSeattle/Tacoma Intl

$1,045

Air Canada

Jul 5

SEA5:45 amSeattle/Tacoma Intl

32h 35m

1 stop

SYD7:20 amSydney Kingsford Smith

Jul 12

SYD9:20 amSydney Kingsford Smith

17h 47m

1 stop

SEA10:07 amSeattle/Tacoma Intl

$1,046

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sat 8/15

10:03 am-6:45 am

1 stop27h 42m

Melbourne

Sat 8/29

9:45 am-9:39 pm

1 stop28h 54m

$996

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sun 8/9

6:03 am-6:45 am

1 stop31h 42m

Melbourne

Sun 8/23

9:45 am-12:20 pm

1 stop19h 35m

$1,004

Quickest round-trip

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 7/28

7:20 pm-7:20 am

1 stop19h 00m

Sydney Kingsford Smith

Tue 8/11

9:20 am-2:22 pm

1 stop22h 02m

$1,045

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 7/5

5:45 am-7:20 am

1 stop32h 35m

Sydney Kingsford Smith

Sun 7/12

9:20 am-10:07 am

1 stop17h 47m

$1,046

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Fri 9/25

3:58 pm-6:45 am

1 stop21h 47m

Melbourne

Fri 10/23

9:45 am-12:16 pm

1 stop20h 31m

$1,070

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Tue 8/11

5:10 pm-6:45 am

1 stop20h 35m

Melbourne

Fri 8/21

9:45 am-10:59 pm

1 stop30h 14m

$1,078

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Mon 10/5

7:40 am-5:00 am

1 stop27h 20m

Melbourne

Tue 10/13

9:45 am-12:25 pm

1 stop20h 40m

$1,081

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sat 10/24

11:58 am-6:45 am

2 stops24h 47m

Melbourne

Sat 11/14

12:00 pm-11:05 pm

1 stop30h 05m

$1,086

SeattleCanberra

SEA - CBR

SEACBR

Seattle/Tacoma Intl

Tue 6/23

5:20 pm-1:15 pm

2 stops26h 55m

Canberra

Tue 6/30

8:10 am-8:53 pm

2 stops29h 43m

$1,361

SeattleCanberra

SEA - CBR

SEACBR

Seattle/Tacoma Intl

Tue 6/23

5:20 pm-1:15 pm

2 stops26h 55m

Canberra

Tue 6/30

6:50 pm-9:10 pm

3 stops43h 20m

$1,369

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 $1,048 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 $900 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 15m
Direct flights	None

The fastest flight from Seattle to Australia takes 18h 15m

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 May 2026, there are 12 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 12,440 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $385	Free Cancellation	Rating 7.1 11,106 reviews	Search Air Canada flights
ANA	PriceFrom $583	Free Cancellation	Rating 8.3 1,219 reviews	Search ANA flights
Qantas Airways	PriceFrom $789	Free Cancellation	Rating 7.5 1,042 reviews	Search Qantas Airways flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.1 11,643 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $813	Free Cancellation	Rating 7.8 2,833 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $832	Free Cancellation	Rating 7.4 9,768 reviews	Search United Airlines flights
Delta	PriceFrom $842	Free Cancellation	Rating 7.9 8,414 reviews	Search Delta flights
Air New Zealand	PriceFrom $947	Free Cancellation	Rating 8.0 648 reviews	Search Air New Zealand flights
Cathay Pacific	PriceFrom $1,153	Free Cancellation	Rating 7.6 1,352 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.