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?

United Airlines, Delta, and American Airlines 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 July 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.

$478 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.

10:40 am - 9:25 am

SEA

SYD

29h 45m

2 stops

11:45 am - 6:32 pm

SYD

SEA

23h 47m

2 stops

$970Multiple Airlines

Sun, Aug 2 - Wed, Aug 19

4:30 pm - 9:25 am

SEA

SYD

23h 55m

1 stop

11:45 am - 6:32 pm

SYD

SEA

23h 47m

2 stops

$971Multiple Airlines

Tue, Aug 4 - Tue, Aug 18

5:50 pm - 7:50 am

SEA

MEL

21h 00m

1 stop

10:00 am - 11:44 pm

MEL

SEA

30h 44m

1 stop

$980Delta

Mon, Aug 3 - Sun, Aug 16

2:50 pm - 7:50 am

SEA

MEL

24h 00m

1 stop

10:00 am - 2:50 pm

MEL

SEA

21h 50m

1 stop

$988Delta

Fri, Aug 7 - Fri, Aug 14

3:30 pm - 10:40 am

SEA

CBR

26h 10m

2 stops

6:20 am - 2:24 pm

CBR

SEA

25h 04m

2 stops

$1,101United Airlines

Wed, Aug 12 - Wed, Aug 19

3:00 pm - 7:05 am

SEA

BNE

23h 05m

1 stop

10:00 am - 10:42 pm

BNE

SEA

29h 42m

1 stop

$1,109Air Canada

Sun, Aug 9 - Sun, Aug 23

5:50 am - 7:05 am

SEA

BNE

32h 15m

1 stop

10:00 am - 6:32 pm

BNE

SEA

25h 32m

1 stop

$1,150Air Canada

Sun, Aug 2 - Sun, Aug 16

7:35 pm - 6:30 am

SEA

BNE

17h 55m

1 stop

11:40 am - 7:31 pm

BNE

SEA

24h 51m

1 stop

$1,155United Airlines

Wed, Oct 28 - Sun, Nov 1

5:10 pm - 9:25 am

SEA

ADL

23h 45m

2 stops

6:00 am - 12:20 pm

ADL

SEA

22h 50m

2 stops

$1,251Qantas Airways

Thu, Aug 20 - Thu, Aug 27

4:59 pm - 1:50 pm

SEA

HBA

27h 51m

2 stops

11:25 am - 10:57 pm

HBA

SEA

28h 32m

2 stops

$1,329Qantas Airways

Thu, Sep 24 - Sat, Oct 3

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United Airlines flights from Seattle to Australia

Our best United Airlines deals on Seattle to Australia flight tickets

United Airlines

Jul 28

SEA1:30 pmSeattle/Tacoma Intl

24h 25m

1 stop

SYD6:55 amSydney Kingsford Smith

Aug 11

SYD9:30 amSydney Kingsford Smith

26h 44m

1 stop

SEA7:14 pmSeattle/Tacoma Intl

$988

United Airlines

Jul 28

SEA3:33 pmSeattle/Tacoma Intl

22h 22m

1 stop

SYD6:55 amSydney Kingsford Smith

Aug 11

SYD9:30 amSydney Kingsford Smith

29h 01m

2 stops

SEA9:31 pmSeattle/Tacoma Intl

$989

United Airlines

Jul 28

SEA12:50 pmSeattle/Tacoma Intl

25h 10m

2 stops

SYD7:00 amSydney Kingsford Smith

Aug 11

SYD10:20 amSydney Kingsford Smith

24h 22m

2 stops

SEA5:42 pmSeattle/Tacoma Intl

$993

ANA flights from Seattle to Australia

Our best ANA deals on Seattle to Australia flight tickets

ANA

Aug 16

SEA10:40 amSeattle/Tacoma Intl

29h 45m

2 stops

SYD9:25 amSydney Kingsford Smith

Aug 23

SYD11:45 amSydney Kingsford Smith

23h 47m

2 stops

SEA6:32 pmSeattle/Tacoma Intl

$971

ANA

Aug 2

SEA4:30 pmSeattle/Tacoma Intl

23h 55m

1 stop

SYD9:25 amSydney Kingsford Smith

Aug 19

SYD11:45 amSydney Kingsford Smith

23h 47m

2 stops

SEA6:32 pmSeattle/Tacoma Intl

$973

ANA

Aug 10

SEA4:30 pmSeattle/Tacoma Intl

33h 40m

1 stop

SYD7:10 pmSydney Kingsford Smith

Aug 17

SYD11:45 amSydney Kingsford Smith

23h 47m

2 stops

SEA6:32 pmSeattle/Tacoma Intl

$982

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 8/2

10:40 am-9:25 am

2 stops29h 45m

Sydney Kingsford Smith

Wed 8/19

11:45 am-6:32 pm

2 stops23h 47m

$970

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 8/4

4:30 pm-9:25 am

1 stop23h 55m

Sydney Kingsford Smith

Tue 8/18

11:45 am-6:32 pm

2 stops23h 47m

$971

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Mon 8/3

5:50 pm-7:50 am

1 stop21h 00m

Melbourne

Sun 8/16

10:00 am-11:44 pm

1 stop30h 44m

$980

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Fri 8/7

2:50 pm-7:50 am

1 stop24h 00m

Melbourne

Fri 8/14

10:00 am-2:50 pm

1 stop21h 50m

$988

SeattleCanberra

SEA - CBR

SEACBR

Seattle/Tacoma Intl

Wed 8/12

3:30 pm-10:40 am

2 stops26h 10m

Canberra

Wed 8/19

6:20 am-2:24 pm

2 stops25h 04m

$1,101

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Sun 8/9

3:00 pm-7:05 am

1 stop23h 05m

Brisbane

Sun 8/23

10:00 am-10:42 pm

1 stop29h 42m

$1,109

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Sun 8/2

5:50 am-7:05 am

1 stop32h 15m

Brisbane

Sun 8/16

10:00 am-6:32 pm

1 stop25h 32m

$1,150

Quickest round-trip

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Wed 10/28

7:35 pm-6:30 am

1 stop17h 55m

Brisbane

Sun 11/1

11:40 am-7:31 pm

1 stop24h 51m

$1,155

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 8/20

5:10 pm-9:25 am

2 stops23h 45m

Adelaide

Thu 8/27

6:00 am-12:20 pm

2 stops22h 50m

$1,251

SeattleHobart

SEA - HBA

SEAHBA

Seattle/Tacoma Intl

Thu 9/24

4:59 pm-1:50 pm

2 stops27h 51m

Hobart

Sat 10/3

11:25 am-10:57 pm

2 stops28h 32m

$1,329

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 $968. If you aren’t able to travel during the month of February, then book flights to Australia from Seattle during August instead. Flights to Australia in August, while not as cheap as those in February, still average around $1,054.

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 $1,083 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 $936 on momondo.

Can stopping save me money on Seattle to Australia flights?

You could potentially save up to 21% 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	17h 45m
Direct flights	None

The fastest flight from Seattle to Australia takes 17h 45m

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 July 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 12,672 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $385	Free Cancellation	Rating 7.1 11,352 reviews	Search Air Canada flights
ANA	PriceFrom $583	Free Cancellation	Rating 8.3 1,272 reviews	Search ANA flights
Qantas Airways	PriceFrom $803	Free Cancellation	Rating 7.5 1,062 reviews	Search Qantas Airways flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.1 11,828 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $813	Free Cancellation	Rating 7.8 2,823 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $831	Free Cancellation	Rating 7.4 10,006 reviews	Search United Airlines flights
Delta	PriceFrom $842	Free Cancellation	Rating 7.8 8,480 reviews	Search Delta flights
Air New Zealand	PriceFrom $947	Free Cancellation	Rating 8.0 654 reviews	Search Air New Zealand flights
Cathay Pacific	PriceFrom $1,153	Free Cancellation	Rating 7.6 1,416 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.