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 42% 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?

Philippine Airlines, United Airlines, and Air Canada 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 January 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.

$377 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.

8:00 pm - 8:45 am

SEA

BNE

18h 45m1 stop

10:45 am - 9:31 am

BNE

SEA

16h 46m1 stop

$797Air Canada

Fri, Feb 20 - Sun, Mar 1

8:00 pm - 8:45 am

SEA

BNE

18h 45m1 stop

10:45 am - 2:31 pm

BNE

SEA

21h 46m1 stop

$798Air Canada

Sun, Feb 15 - Sun, Feb 22

8:00 pm - 11:05 am

SEA

BNE

22h 05m2 stops

10:00 am - 9:33 am

BNE

SEA

16h 33m1 stop

$813Multiple Airlines

Tue, Mar 31 - Tue, Apr 7

8:00 pm - 1:25 pm

SEA

BNE

23h 25m2 stops

9:45 am - 9:31 am

BNE

SEA

16h 46m1 stop

$814Multiple Airlines

Wed, Mar 4 - Wed, Mar 18

8:00 pm - 3:30 pm

SEA

BNE

25h 30m2 stops

10:45 am - 2:31 pm

BNE

SEA

21h 46m1 stop

$821Air Canada

Sun, Feb 15 - Sun, Feb 22

3:57 pm - 9:30 am

SEA

MEL

22h 33m1 stop

6:45 am - 6:58 pm

MEL

SEA

31h 13m2 stops

$932Qantas Airways

Wed, Feb 11 - Wed, Feb 18

9:45 am - 5:25 am

SEA

PER

28h 40m1 stop

5:05 pm - 8:10 am

PER

SEA

30h 05m1 stop

$1,089Singapore Airlines

Tue, Mar 10 - Mon, Mar 23

5:10 pm - 9:30 am

SEA

ADL

21h 50m1 stop

2:55 pm - 6:26 pm

ADL

SEA

22h 01m1 stop

$1,105United Airlines

Mon, Feb 2 - Mon, Feb 16

10:15 am - 11:55 pm

SEA

PER

22h 40m1 stop

1:10 am - 8:45 am

PER

SEA

22h 35m1 stop

$1,105Singapore Airlines

Tue, Apr 7 - Mon, Apr 27

4:50 pm - 10:55 am

SEA

ADL

23h 35m2 stops

7:50 am - 6:57 pm

ADL

SEA

29h 37m2 stops

$1,121Qantas Airways

Fri, Feb 13 - Fri, Feb 20

Air Canada flights from Seattle to Australia

Our best Air Canada deals on Seattle to Australia flight tickets

Air Canada

Jan 11

SEA3:40 pmSeattle/Tacoma Intl

23h 05m

1 stop

BNE8:45 amBrisbane

Jan 24

BNE10:45 amBrisbane

16h 46m

1 stop

SEA9:31 amSeattle/Tacoma Intl

$767

Find similar

Air Canada

Jan 11

SEA3:40 pmSeattle/Tacoma Intl

23h 05m

1 stop

BNE8:45 amBrisbane

Jan 24

BNE6:05 amBrisbane

26h 26m

2 stops

SEA2:31 pmSeattle/Tacoma Intl

$789

Find similar

Air Canada

Feb 20

SEA8:00 pmSeattle/Tacoma Intl

18h 45m

1 stop

BNE8:45 amBrisbane

Mar 1

BNE10:45 amBrisbane

16h 46m

1 stop

SEA9:31 amSeattle/Tacoma Intl

$797

Find similar

Alaska Airlines flights from Seattle to Australia

Our best Alaska Airlines deals on Seattle to Australia flight tickets

Alaska Airlines

Jan 13

SEA7:00 amSeattle/Tacoma Intl

17h 45m

1 stop

SYD7:45 pmSydney Kingsford Smith

Oct 18

SYD8:45 pmSydney Kingsford Smith

19h 00m

1 stop

SEA9:45 pmSeattle/Tacoma Intl

$1,138

Find similar

Alaska Airlines

Jan 6

SEA7:00 amSeattle/Tacoma Intl

17h 45m

1 stop

SYD7:45 pmSydney Kingsford Smith

Jan 14

SYD9:40 pmSydney Kingsford Smith

18h 20m

1 stop

SEA9:00 pmSeattle/Tacoma Intl

$1,237

Find similar

Alaska Airlines

Jan 6

SEA5:50 pmSeattle/Tacoma Intl

30h 55m

1 stop

SYD7:45 pmSydney Kingsford Smith

Feb 6

SYD9:40 pmSydney Kingsford Smith

18h 22m

1 stop

SEA9:02 pmSeattle/Tacoma Intl

$1,254

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Fri 2/20

8:00 pm-8:45 am

1 stop18h 45m

Brisbane

Sun 3/1

10:45 am-9:31 am

1 stop16h 46m

$797

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Sun 2/15

8:00 pm-8:45 am

1 stop18h 45m

Brisbane

Sun 2/22

10:45 am-2:31 pm

1 stop21h 46m

$798

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 3/31

8:00 pm-11:05 am

2 stops22h 05m

Brisbane

Tue 4/7

10:00 am-9:33 am

1 stop16h 33m

$813

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Wed 3/4

8:00 pm-1:25 pm

2 stops23h 25m

Brisbane

Wed 3/18

9:45 am-9:31 am

1 stop16h 46m

$814

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Sun 2/15

8:00 pm-3:30 pm

2 stops25h 30m

Brisbane

Sun 2/22

10:45 am-2:31 pm

1 stop21h 46m

$821

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Wed 2/11

3:57 pm-9:30 am

1 stop22h 33m

Melbourne

Wed 2/18

6:45 am-6:58 pm

2 stops31h 13m

$932

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 3/10

9:45 am-5:25 am

1 stop28h 40m

Perth

Mon 3/23

5:05 pm-8:10 am

1 stop30h 05m

$1,089

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 2/2

5:10 pm-9:30 am

1 stop21h 50m

Adelaide

Mon 2/16

2:55 pm-6:26 pm

1 stop22h 01m

$1,105

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 4/7

10:15 am-11:55 pm

1 stop22h 40m

Perth

Mon 4/27

1:10 am-8:45 am

1 stop22h 35m

$1,105

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 2/13

4:50 pm-10:55 am

2 stops23h 35m

Adelaide

Fri 2/20

7:50 am-6:57 pm

2 stops29h 37m

$1,121

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 August is, on average, the cheapest month to fly to Australia from Seattle, with most prices found around $846. If you aren’t able to travel during the month of August, then book flights to Australia from Seattle during September instead. Flights to Australia in September, while not as cheap as those in August, still average around $878.

How far in advance should I book a flight 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 $1,069 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 $877 on momondo.

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 58m
Direct flights	None

The fastest flight from Seattle to Australia takes 17h 58m

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

Search flight deals

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 January 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 8.0 11,604 reviews	Search Alaska Airlines flights
ANA	PriceFrom $583	Free Cancellation	Rating 8.4 1,055 reviews	Search ANA flights
Qantas Airways	PriceFrom $647	Free Cancellation	Rating 7.5 961 reviews	Search Qantas Airways flights
Philippine Airlines	PriceFrom $758	Free Cancellation	Rating 7.3 946 reviews	Search Philippine Airlines flights
Air Canada	PriceFrom $779	Free Cancellation	Rating 7.1 10,574 reviews	Search Air Canada flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.2 11,075 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $812	Free Cancellation	Rating 7.8 2,823 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $830	Free Cancellation	Rating 7.4 9,129 reviews	Search United Airlines flights
Delta	PriceFrom $842	Free Cancellation	Rating 7.9 8,023 reviews	Search Delta flights
Singapore Airlines	PriceFrom $1,265	Free Cancellation	Rating 8.1 1,424 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.