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 43% 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?

Philippine 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 December 2025, 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.

$379 Cheap Flights from Seattle to Australia in 2025/26

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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.

5:50 am - 8:45 am

SEA

BNE

32h 55m1 stop

10:45 am - 9:31 am

BNE

SEA

16h 46m1 stop

$792Air Canada

Tue, Dec 23 - Sat, Dec 27

8:00 pm - 8:45 am

SEA

BNE

18h 45m1 stop

10:45 am - 7:16 pm

BNE

SEA

26h 31m1 stop

$793Air Canada

Tue, Dec 23 - Fri, Dec 26

3:40 pm - 8:45 am

SEA

BNE

23h 05m1 stop

10:00 am - 2:16 pm

BNE

SEA

21h 16m1 stop

$794Air Canada

Tue, Dec 23 - Tue, May 19

3:57 pm - 2:25 pm

SEA

SYD

27h 28m2 stops

9:25 pm - 9:58 pm

SYD

SEA

19h 33m1 stop

$903Qantas Airways

Wed, Jan 28 - Sun, Feb 8

12:25 pm - 10:00 am

SEA

MEL

26h 35m2 stops

1:00 pm - 9:01 pm

MEL

SEA

27h 01m1 stop

$1,000United Airlines

Sat, Jan 31 - Fri, Feb 13

12:35 pm - 10:00 am

SEA

MEL

26h 25m1 stop

11:30 am - 9:01 pm

MEL

SEA

28h 31m2 stops

$1,002United Airlines

Sun, Feb 1 - Sat, Feb 14

6:00 am - 9:30 am

SEA

MEL

32h 30m1 stop

12:00 pm - 1:59 pm

MEL

SEA

20h 59m1 stop

$1,007Qantas Airways

Thu, Feb 5 - Thu, Feb 12

10:15 am - 11:55 pm

SEA

PER

22h 40m1 stop

5:10 pm - 8:45 am

PER

SEA

30h 35m1 stop

$1,093Singapore Airlines

Tue, Apr 7 - Mon, Apr 27

9:45 am - 5:25 am

SEA

PER

28h 40m1 stop

5:10 pm - 8:45 am

PER

SEA

30h 35m1 stop

$1,102Singapore Airlines

Thu, Mar 19 - Wed, Apr 8

7:00 am - 8:15 am

SEA

ADL

30h 45m2 stops

5:10 pm - 5:25 am

ADL

SEA

30h 45m2 stops

$1,332Alaska Airlines

Tue, Jan 13 - Sat, Feb 28

Qantas Airways flights from Seattle to Australia

Our best Qantas Airways deals on Seattle to Australia flight tickets

Qantas Airways

Jan 28

SEA3:57 pmSeattle/Tacoma Intl

27h 28m

2 stops

SYD2:25 pmSydney Kingsford Smith

Feb 8

SYD9:25 pmSydney Kingsford Smith

19h 33m

1 stop

SEA9:58 pmSeattle/Tacoma Intl

$903

Find similar

Qantas Airways

Feb 7

SEA12:59 pmSeattle/Tacoma Intl

23h 26m

1 stop

SYD7:25 amSydney Kingsford Smith

Feb 14

SYD5:50 pmSydney Kingsford Smith

44h 03m

2 stops

SEA6:53 pmSeattle/Tacoma Intl

$982

Find similar

Qantas Airways

Dec 31

SEA6:00 amSeattle/Tacoma Intl

32h 00m

1 stop

SYD9:00 amSydney Kingsford Smith

Feb 10

SYD7:15 pmSydney Kingsford Smith

41h 50m

2 stops

SEA6:05 pmSeattle/Tacoma Intl

$1,006

Find similar

Air Canada flights from Seattle to Australia

Our best Air Canada deals on Seattle to Australia flight tickets

Air Canada

Dec 23

SEA5:50 amSeattle/Tacoma Intl

32h 55m

1 stop

BNE8:45 amBrisbane

Dec 27

BNE10:45 amBrisbane

16h 46m

1 stop

SEA9:31 amSeattle/Tacoma Intl

$792

Find similar

Air Canada

Dec 23

SEA8:00 pmSeattle/Tacoma Intl

18h 45m

1 stop

BNE8:45 amBrisbane

Dec 26

BNE10:45 amBrisbane

26h 31m

1 stop

SEA7:16 pmSeattle/Tacoma Intl

$793

Find similar

Air Canada

Dec 23

SEA3:40 pmSeattle/Tacoma Intl

23h 05m

1 stop

BNE8:45 amBrisbane

May 19

BNE10:00 amBrisbane

21h 16m

1 stop

SEA2:16 pmSeattle/Tacoma Intl

$794

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 12/23

5:50 am-8:45 am

1 stop32h 55m

Brisbane

Sat 12/27

10:45 am-9:31 am

1 stop16h 46m

$792

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 12/23

8:00 pm-8:45 am

1 stop18h 45m

Brisbane

Fri 12/26

10:45 am-7:16 pm

1 stop26h 31m

$793

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 12/23

3:40 pm-8:45 am

1 stop23h 05m

Brisbane

Tue 5/19

10:00 am-2:16 pm

1 stop21h 16m

$794

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 1/28

3:57 pm-2:25 pm

2 stops27h 28m

Sydney Kingsford Smith

Sun 2/8

9:25 pm-9:58 pm

1 stop19h 33m

$903

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sat 1/31

12:25 pm-10:00 am

2 stops26h 35m

Melbourne

Fri 2/13

1:00 pm-9:01 pm

1 stop27h 01m

$1,000

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sun 2/1

12:35 pm-10:00 am

1 stop26h 25m

Melbourne

Sat 2/14

11:30 am-9:01 pm

2 stops28h 31m

$1,002

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Thu 2/5

6:00 am-9:30 am

1 stop32h 30m

Melbourne

Thu 2/12

12:00 pm-1:59 pm

1 stop20h 59m

$1,007

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 4/7

10:15 am-11:55 pm

1 stop22h 40m

Perth

Mon 4/27

5:10 pm-8:45 am

1 stop30h 35m

$1,093

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Thu 3/19

9:45 am-5:25 am

1 stop28h 40m

Perth

Wed 4/8

5:10 pm-8:45 am

1 stop30h 35m

$1,102

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 1/13

7:00 am-8:15 am

2 stops30h 45m

Adelaide

Sat 2/28

5:10 pm-5:25 am

2 stops30h 45m

$1,332

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.

What is the cheapest day to depart on your flight to Australia?

The cheapest day to depart from Seattle to Australia is on a Tuesday. Travelers who choose to depart for Australia on a Tuesday will often find tickets for as low as $1,078. On the other hand, Thursday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,156.

What is the cheapest time of day to depart on your flight to Australia?

Flying to Australia from Seattle in the evening is the least expensive time of day to depart. momondo users have found prices as low as $1,078 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $1,152 on average. Flights to Australia from Seattle in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 $1,062 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.

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	18h 20m
Direct flights	None

The fastest flight from Seattle to Australia takes 18h 20m

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 December 2025, 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
ANA	PriceFrom $583	Free Cancellation	Rating 8.4 1,020 reviews	Search ANA flights
Alaska Airlines	PriceFrom $591	Free Cancellation	Rating 8.0 11,424 reviews	Search Alaska Airlines flights
Philippine Airlines	PriceFrom $758	Free Cancellation	Rating 7.3 941 reviews	Search Philippine Airlines flights
Air Canada	PriceFrom $779	Free Cancellation	Rating 7.1 10,514 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $789	Free Cancellation	Rating 7.5 947 reviews	Search Qantas Airways flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.2 11,047 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $813	Free Cancellation	Rating 7.8 2,818 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $831	Free Cancellation	Rating 7.4 9,093 reviews	Search United Airlines flights
Delta	PriceFrom $842	Free Cancellation	Rating 7.9 8,007 reviews	Search Delta flights
Singapore Airlines	PriceFrom $1,239	Free Cancellation	Rating 8.1 1,412 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.