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 40% of people opting to fly with this airline when traveling to Australia. Keep in mind that there are 10 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?

Air Canada, Cathay Pacific, and Qantas Airways 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 February 2026, there are 10 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.

$393 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.

3:40 pm - 7:45 am

SEA

BNE

23h 05m

1 stop

10:00 am - 6:30 pm

BNE

SEA

25h 30m

1 stop

$801Air Canada

Tue, Mar 10 - Sun, May 10

3:40 pm - 7:45 am

SEA

BNE

23h 05m

1 stop

10:00 am - 6:30 pm

BNE

SEA

25h 30m

1 stop

$804Air Canada

Tue, Mar 10 - Sun, May 10

3:40 pm - 7:05 am

SEA

BNE

22h 25m

1 stop

10:00 am - 9:15 am

BNE

SEA

16h 15m

1 stop

$866Multiple Airlines

Sun, Apr 19 - Wed, May 6

3:40 pm - 6:50 pm

SEA

BNE

34h 10m

2 stops

10:00 am - 10:20 pm

BNE

SEA

29h 20m

1 stop

$884Multiple Airlines

Tue, Apr 28 - Sun, May 10

6:40 pm - 7:05 am

SEA

SYD

19h 25m

1 stop

9:10 am - 6:07 pm

SYD

SEA

25h 57m

1 stop

$895American Airlines

Sun, Apr 19 - Mon, May 11

2:57 pm - 7:05 am

SEA

SYD

23h 08m

2 stops

9:10 am - 6:07 pm

SYD

SEA

25h 57m

1 stop

$900American Airlines

Sun, Apr 19 - Mon, May 11

4:31 pm - 8:05 am

SEA

SYD

21h 34m

1 stop

10:20 am - 2:46 pm

SYD

SEA

21h 26m

1 stop

$901United Airlines

Sun, Mar 22 - Tue, Apr 7

12:55 pm - 8:05 am

SEA

SYD

25h 10m

2 stops

10:20 am - 2:46 pm

SYD

SEA

21h 26m

1 stop

$905United Airlines

Mon, Mar 23 - Wed, Apr 8

10:00 am - 10:45 am

SEA

HBA

31h 45m

2 stops

6:00 am - 10:58 pm

HBA

SEA

33h 58m

2 stops

$1,384Qantas Airways

Wed, Apr 8 - Wed, Apr 15

6:59 pm - 1:35 pm

SEA

HBA

24h 36m

2 stops

6:05 pm - 12:58 pm

HBA

SEA

36h 53m

2 stops

$1,398Qantas Airways

Tue, Mar 24 - Wed, Apr 1

Delta flights from Seattle to Australia

Our best Delta deals on Seattle to Australia flight tickets

Delta

May 10

SEA9:25 amSeattle/Tacoma Intl

28h 25m

2 stops

SYD6:50 amSydney Kingsford Smith

May 26

SYD9:15 amSydney Kingsford Smith

18h 40m

1 stop

SEA10:55 amSeattle/Tacoma Intl

$918

Delta

Jun 20

SEA9:25 pmSeattle/Tacoma Intl

40h 25m

1 stop

SYD6:50 amSydney Kingsford Smith

Jul 7

SYD9:15 amSydney Kingsford Smith

20h 43m

1 stop

SEA12:58 pmSeattle/Tacoma Intl

$921

Delta

May 9

SEA9:20 pmSeattle/Tacoma Intl

40h 30m

1 stop

SYD6:50 amSydney Kingsford Smith

May 27

SYD9:15 amSydney Kingsford Smith

23h 08m

2 stops

SEA3:23 pmSeattle/Tacoma Intl

$925

ANA flights from Seattle to Australia

Our best ANA deals on Seattle to Australia flight tickets

ANA

Jun 23

SEA5:04 pmSeattle/Tacoma Intl

33h 11m

2 stops

SYD7:15 pmSydney Kingsford Smith

Jul 5

SYD8:55 pmSydney Kingsford Smith

34h 30m

1 stop

SEA2:25 pmSeattle/Tacoma Intl

$931

ANA

Mar 1

SEA3:40 pmSeattle/Tacoma Intl

30h 00m

2 stops

SYD4:40 pmSydney Kingsford Smith

May 27

SYD6:00 amSydney Kingsford Smith

25h 20m

2 stops

SEA2:20 pmSeattle/Tacoma Intl

$1,060

ANA

Aug 16

SEA4:30 pmSeattle/Tacoma Intl

52h 05m

2 stops

MEL1:35 pmMelbourne

Sep 1

MEL8:00 amMelbourne

47h 25m

2 stops

SEA2:25 pmSeattle/Tacoma Intl

$1,090

Fly from

Fly to

Route

Depart

Return

Price

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 3/10

3:40 pm-7:45 am

1 stop23h 05m

Brisbane

Sun 5/10

10:00 am-6:30 pm

1 stop25h 30m

$801

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 3/10

3:40 pm-7:45 am

1 stop23h 05m

Brisbane

Sun 5/10

10:00 am-6:30 pm

1 stop25h 30m

$804

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Sun 4/19

3:40 pm-7:05 am

1 stop22h 25m

Brisbane

Wed 5/6

10:00 am-9:15 am

1 stop16h 15m

$866

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 4/28

3:40 pm-6:50 pm

2 stops34h 10m

Brisbane

Sun 5/10

10:00 am-10:20 pm

1 stop29h 20m

$884

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 4/19

6:40 pm-7:05 am

1 stop19h 25m

Sydney Kingsford Smith

Mon 5/11

9:10 am-6:07 pm

1 stop25h 57m

$895

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 4/19

2:57 pm-7:05 am

2 stops23h 08m

Sydney Kingsford Smith

Mon 5/11

9:10 am-6:07 pm

1 stop25h 57m

$900

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 3/22

4:31 pm-8:05 am

1 stop21h 34m

Sydney Kingsford Smith

Tue 4/7

10:20 am-2:46 pm

1 stop21h 26m

$901

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 3/23

12:55 pm-8:05 am

2 stops25h 10m

Sydney Kingsford Smith

Wed 4/8

10:20 am-2:46 pm

1 stop21h 26m

$905

SeattleHobart

SEA - HBA

SEAHBA

Seattle/Tacoma Intl

Wed 4/8

10:00 am-10:45 am

2 stops31h 45m

Hobart

Wed 4/15

6:00 am-10:58 pm

2 stops33h 58m

$1,384

SeattleHobart

SEA - HBA

SEAHBA

Seattle/Tacoma Intl

Tue 3/24

6:59 pm-1:35 pm

2 stops24h 36m

Hobart

Wed 4/1

6:05 pm-12:58 pm

2 stops36h 53m

$1,398

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 $845. If you aren’t able to travel during the month of August, then book flights to Australia from Seattle during February instead. Flights to Australia in February, while not as cheap as those in August, still average around $848.

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 $1,066 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 $876 on momondo.

Can stopping save me money on Seattle to Australia flights?

You could potentially save up to 11% 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 February 2026, there are 10 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 11,948 reviews	Search Alaska Airlines flights
ANA	PriceFrom $583	Free Cancellation	Rating 8.4 1,100 reviews	Search ANA flights
Qantas Airways	PriceFrom $647	Free Cancellation	Rating 7.5 997 reviews	Search Qantas Airways flights
Air Canada	PriceFrom $779	Free Cancellation	Rating 7.1 10,742 reviews	Search Air Canada flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.2 11,344 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $812	Free Cancellation	Rating 7.8 2,836 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $819	Free Cancellation	Rating 7.4 9,344 reviews	Search United Airlines flights
Delta	PriceFrom $842	Free Cancellation	Rating 7.9 8,238 reviews	Search Delta flights
Alaska Airlines	PriceFrom $1,126	Free Cancellation	Rating 0.0	Search Alaska Airlines flights
Singapore Airlines	PriceFrom $1,218	Free Cancellation	Rating 8.2 1,463 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.