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?

American Airlines, Delta, and United 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 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.

$377 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.

8:00 pm - 8:45 am

SEA

BNE

18h 45m1 stop

10:45 am - 9:15 am

BNE

SEA

16h 30m1 stop

$796Air Canada

Tue, Feb 10 - Fri, Feb 27

8:00 pm - 2:20 pm

SEA

BNE

24h 20m2 stops

10:45 am - 3:01 pm

BNE

SEA

22h 16m1 stop

$812Multiple Airlines

Thu, Feb 19 - Wed, Mar 4

5:53 pm - 3:35 pm

SEA

MEL

26h 42m2 stops

9:45 am - 10:49 pm

MEL

SEA

30h 04m1 stop

$983Qantas Airways

Tue, Feb 10 - Mon, Apr 20

5:53 pm - 3:35 pm

SEA

MEL

26h 42m2 stops

9:45 am - 10:49 pm

MEL

SEA

30h 04m1 stop

$984Qantas Airways

Tue, Feb 10 - Mon, Apr 20

10:31 am - 5:00 am

SEA

MEL

23h 29m1 stop

4:05 pm - 9:18 pm

MEL

SEA

24h 13m1 stop

$989American Airlines

Sat, Feb 21 - Sat, Mar 7

5:10 pm - 10:00 am

SEA

MEL

21h 50m1 stop

1:00 pm - 6:26 pm

MEL

SEA

24h 26m1 stop

$1,005United Airlines

Thu, Feb 5 - Thu, Feb 19

7:30 pm - 10:00 am

SEA

MEL

19h 30m1 stop

1:00 pm - 3:41 pm

MEL

SEA

21h 41m1 stop

$1,011United Airlines

Wed, Feb 4 - Sat, Feb 14

10:15 am - 11:55 pm

SEA

PER

22h 40m1 stop

1:10 am - 8:45 am

PER

SEA

22h 35m1 stop

$1,098Singapore Airlines

Tue, Apr 7 - Mon, Apr 27

8:45 am - 5:25 am

SEA

PER

28h 40m1 stop

5:05 pm - 8:10 am

PER

SEA

30h 05m1 stop

$1,167Singapore Airlines

Sun, Mar 1 - Fri, Mar 20

7:08 pm - 1:05 pm

SEA

CBR

24h 57m2 stops

1:50 pm - 10:49 pm

CBR

SEA

25h 59m2 stops

$1,267American Airlines

Tue, Apr 21 - Tue, Apr 28

Air Canada flights from Seattle to Australia

Our best Air Canada deals on Seattle to Australia flight tickets

Air Canada

Feb 10

SEA8:00 pmSeattle/Tacoma Intl

18h 45m

1 stop

BNE8:45 amBrisbane

Feb 27

BNE10:45 amBrisbane

16h 30m

1 stop

SEA9:15 amSeattle/Tacoma Intl

$796

Find similar

Air Canada

Jan 25

SEA8:00 pmSeattle/Tacoma Intl

18h 45m

1 stop

BNE8:45 amBrisbane

Feb 14

BNE10:45 amBrisbane

26h 31m

1 stop

SEA7:16 pmSeattle/Tacoma Intl

$825

Find similar

Air Canada

Jan 30

SEA8:00 pmSeattle/Tacoma Intl

18h 45m

1 stop

BNE8:45 amBrisbane

Feb 6

BNE10:45 amBrisbane

29h 21m

1 stop

SEA10:06 pmSeattle/Tacoma Intl

$827

Find similar

Delta flights from Seattle to Australia

Our best Delta deals on Seattle to Australia flight tickets

Delta

Feb 20

SEA7:55 pmSeattle/Tacoma Intl

18h 25m

1 stop

BNE8:20 amBrisbane

Mar 1

BNE10:40 amBrisbane

22h 04m

1 stop

SEA2:44 pmSeattle/Tacoma Intl

$869

Find similar

Delta

Feb 20

SEA11:20 amSeattle/Tacoma Intl

27h 00m

2 stops

BNE8:20 amBrisbane

Mar 1

BNE10:40 amBrisbane

20h 18m

1 stop

SEA12:58 pmSeattle/Tacoma Intl

$873

Find similar

Delta

Dec 22

SEA11:45 amSeattle/Tacoma Intl

25h 15m

1 stop

MEL8:00 amMelbourne

Jan 23

MEL10:10 amMelbourne

27h 33m

1 stop

SEA6:43 pmSeattle/Tacoma Intl

$1,018

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 2/10

8:00 pm-8:45 am

1 stop18h 45m

Brisbane

Fri 2/27

10:45 am-9:15 am

1 stop16h 30m

$796

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Thu 2/19

8:00 pm-2:20 pm

2 stops24h 20m

Brisbane

Wed 3/4

10:45 am-3:01 pm

1 stop22h 16m

$812

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Tue 2/10

5:53 pm-3:35 pm

2 stops26h 42m

Melbourne

Mon 4/20

9:45 am-10:49 pm

1 stop30h 04m

$983

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Tue 2/10

5:53 pm-3:35 pm

2 stops26h 42m

Melbourne

Mon 4/20

9:45 am-10:49 pm

1 stop30h 04m

$984

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sat 2/21

10:31 am-5:00 am

1 stop23h 29m

Melbourne

Sat 3/7

4:05 pm-9:18 pm

1 stop24h 13m

$989

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Thu 2/5

5:10 pm-10:00 am

1 stop21h 50m

Melbourne

Thu 2/19

1:00 pm-6:26 pm

1 stop24h 26m

$1,005

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Wed 2/4

7:30 pm-10:00 am

1 stop19h 30m

Melbourne

Sat 2/14

1:00 pm-3:41 pm

1 stop21h 41m

$1,011

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

$1,098

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sun 3/1

8:45 am-5:25 am

1 stop28h 40m

Perth

Fri 3/20

5:05 pm-8:10 am

1 stop30h 05m

$1,167

SeattleCanberra

SEA - CBR

SEACBR

Seattle/Tacoma Intl

Tue 4/21

7:08 pm-1:05 pm

2 stops24h 57m

Canberra

Tue 4/28

1:50 pm-10:49 pm

2 stops25h 59m

$1,267

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 $1,067 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	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

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
Alaska Airlines	PriceFrom $97	Free Cancellation	Rating 8.0 11,478 reviews	Search Alaska Airlines flights
ANA	PriceFrom $583	Free Cancellation	Rating 8.4 1,030 reviews	Search ANA flights
Philippine Airlines	PriceFrom $758	Free Cancellation	Rating 7.3 943 reviews	Search Philippine Airlines flights
Air Canada	PriceFrom $779	Free Cancellation	Rating 7.1 10,534 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 11,055 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $813	Free Cancellation	Rating 7.8 2,820 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 8,009 reviews	Search Delta flights
Singapore Airlines	PriceFrom $1,251	Free Cancellation	Rating 8.1 1,414 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.