What is the cheapest airline that flies from Seattle/Tacoma Intl to Australia?

Air New Zealand, United Airlines, and American Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Australia

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 36% 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.

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 May 2026, 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.

$498 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.

7:20 pm - 7:20 am

SEA

SYD

19h 00m

1 stop

9:20 am - 10:05 am

SYD

SEA

17h 45m

1 stop

$1,012Air Canada

Tue, Jun 2 - Tue, Jun 9

2:55 pm - 7:20 am

SEA

SYD

23h 25m

1 stop

6:00 am - 10:05 am

SYD

SEA

21h 05m

2 stops

$1,032Multiple Airlines

Tue, May 26 - Tue, Jun 2

5:45 am - 7:20 am

SEA

SYD

32h 35m

1 stop

9:20 am - 6:30 pm

SYD

SEA

26h 10m

1 stop

$1,046Air Canada

Wed, Jun 3 - Mon, Jun 15

10:45 am - 7:10 pm

SEA

SYD

39h 25m

2 stops

11:45 am - 6:30 pm

SYD

SEA

23h 45m

2 stops

$1,047ANA

Wed, Jun 3 - Mon, Jun 15

3:55 pm - 6:45 am

SEA

MEL

21h 50m

1 stop

9:45 am - 12:16 pm

MEL

SEA

20h 31m

1 stop

$1,057Qantas Airways

Fri, Sep 25 - Fri, Oct 23

3:55 pm - 6:45 am

SEA

MEL

21h 50m

1 stop

9:45 am - 12:16 pm

MEL

SEA

20h 31m

1 stop

$1,058Qantas Airways

Fri, Sep 25 - Fri, Oct 23

11:43 am - 5:00 am

SEA

MEL

24h 17m

1 stop

9:45 am - 1:57 pm

MEL

SEA

21h 12m

1 stop

$1,074American Airlines

Mon, Jun 22 - Mon, Jun 29

7:00 am - 6:45 am

SEA

MEL

30h 45m

1 stop

9:45 am - 4:32 pm

MEL

SEA

23h 47m

1 stop

$1,081American Airlines

Sat, Aug 1 - Fri, Aug 21

2:36 pm - 8:15 am

SEA

MEL

24h 39m

2 stops

10:55 am - 2:30 pm

MEL

SEA

20h 35m

1 stop

$1,085United Airlines

Thu, Jun 4 - Mon, Jun 15

8:30 am - 7:30 am

SEA

MEL

30h 00m

1 stop

10:55 am - 12:34 pm

MEL

SEA

18h 39m

1 stop

$1,086United Airlines

Wed, May 27 - Mon, Jun 15

ANA flights from Seattle to Australia

Our best ANA deals on Seattle to Australia flight tickets

ANA

Jun 3

SEA10:45 amSeattle/Tacoma Intl

39h 25m

2 stops

SYD7:10 pmSydney Kingsford Smith

Jun 15

SYD11:45 amSydney Kingsford Smith

23h 45m

2 stops

SEA6:30 pmSeattle/Tacoma Intl

$1,047

ANA

Jun 10

SEA10:45 amSeattle/Tacoma Intl

29h 40m

2 stops

SYD9:25 amSydney Kingsford Smith

Jun 17

SYD11:45 amSydney Kingsford Smith

23h 45m

2 stops

SEA6:30 pmSeattle/Tacoma Intl

$1,077

ANA

Aug 15

SEA2:26 pmSeattle/Tacoma Intl

24h 49m

2 stops

MEL8:15 amMelbourne

Aug 29

MEL10:55 amMelbourne

18h 28m

1 stop

SEA12:23 pmSeattle/Tacoma Intl

$1,099

United Airlines flights from Seattle to Australia

Our best United Airlines deals on Seattle to Australia flight tickets

United Airlines

Jun 4

SEA2:36 pmSeattle/Tacoma Intl

24h 39m

2 stops

MEL8:15 amMelbourne

Jun 15

MEL10:55 amMelbourne

20h 35m

1 stop

SEA2:30 pmSeattle/Tacoma Intl

$1,085

United Airlines

May 27

SEA8:30 amSeattle/Tacoma Intl

30h 00m

1 stop

MEL7:30 amMelbourne

Jun 15

MEL10:55 amMelbourne

18h 39m

1 stop

SEA12:34 pmSeattle/Tacoma Intl

$1,086

United Airlines

May 19

SEA12:34 pmSeattle/Tacoma Intl

25h 26m

1 stop

SYD7:00 amSydney Kingsford Smith

Jun 15

SYD9:30 amSydney Kingsford Smith

22h 06m

1 stop

SEA2:36 pmSeattle/Tacoma Intl

$1,090

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 6/2

7:20 pm-7:20 am

1 stop19h 00m

Sydney Kingsford Smith

Tue 6/9

9:20 am-10:05 am

1 stop17h 45m

$1,012

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 5/26

2:55 pm-7:20 am

1 stop23h 25m

Sydney Kingsford Smith

Tue 6/2

6:00 am-10:05 am

2 stops21h 05m

$1,032

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 6/3

5:45 am-7:20 am

1 stop32h 35m

Sydney Kingsford Smith

Mon 6/15

9:20 am-6:30 pm

1 stop26h 10m

$1,046

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 6/3

10:45 am-7:10 pm

2 stops39h 25m

Sydney Kingsford Smith

Mon 6/15

11:45 am-6:30 pm

2 stops23h 45m

$1,047

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Fri 9/25

3:55 pm-6:45 am

1 stop21h 50m

Melbourne

Fri 10/23

9:45 am-12:16 pm

1 stop20h 31m

$1,057

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Fri 9/25

3:55 pm-6:45 am

1 stop21h 50m

Melbourne

Fri 10/23

9:45 am-12:16 pm

1 stop20h 31m

$1,058

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Mon 6/22

11:43 am-5:00 am

1 stop24h 17m

Melbourne

Mon 6/29

9:45 am-1:57 pm

1 stop21h 12m

$1,074

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sat 8/1

7:00 am-6:45 am

1 stop30h 45m

Melbourne

Fri 8/21

9:45 am-4:32 pm

1 stop23h 47m

$1,081

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Thu 6/4

2:36 pm-8:15 am

2 stops24h 39m

Melbourne

Mon 6/15

10:55 am-2:30 pm

1 stop20h 35m

$1,085

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Wed 5/27

8:30 am-7:30 am

1 stop30h 00m

Melbourne

Mon 6/15

10:55 am-12:34 pm

1 stop18h 39m

$1,086

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 January is, on average, the cheapest month to fly to Australia from Seattle, with most prices found around $97. If you aren’t able to travel during the month of January, then book flights to Australia from Seattle during February instead. Flights to Australia in February, while not as cheap as those in January, still average around $142.

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 $1,044 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 $884 on momondo.

Can stopping save me money on Seattle to Australia flights?

You could potentially save up to 27% 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 50m
Direct flights	None

The fastest flight from Seattle to Australia takes 17h 50m

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

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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 May 2026, 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 7.9 12,347 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $385	Free Cancellation	Rating 7.1 11,012 reviews	Search Air Canada flights
ANA	PriceFrom $583	Free Cancellation	Rating 8.3 1,207 reviews	Search ANA flights
Qantas Airways	PriceFrom $647	Free Cancellation	Rating 7.5 1,033 reviews	Search Qantas Airways flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.1 11,669 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $813	Free Cancellation	Rating 7.8 2,837 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $831	Free Cancellation	Rating 7.4 9,695 reviews	Search United Airlines flights
Delta	PriceFrom $842	Free Cancellation	Rating 7.9 8,456 reviews	Search Delta flights
Air New Zealand	PriceFrom $1,116	Free Cancellation	Rating 8.0 640 reviews	Search Air New Zealand flights
Alaska Airlines	PriceFrom $1,126	Free Cancellation	Rating 0.0	Search Alaska 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.