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.

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

American 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 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.

$513 Cheap Flights from Seattle to Australia in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

6:10 pm - 11:30 am

SEA

OOL

24h 20m

2 stops

12:30 pm - 8:42 pm

OOL

SEA

25h 12m

2 stops

$1,007Multiple Airlines

Tue, Aug 11 - Thu, Aug 20

5:10 pm - 6:45 am

SEA

MEL

20h 35m

1 stop

9:45 am - 1:39 pm

MEL

SEA

20h 54m

1 stop

$1,044Qantas Airways

Thu, Jun 11 - Wed, Aug 19

7:20 pm - 7:20 am

SEA

SYD

19h 00m

1 stop

9:20 am - 6:30 pm

SYD

SEA

26h 10m

1 stop

$1,044Air Canada

Sun, May 24 - Sun, Jun 7

3:00 pm - 7:20 am

SEA

SYD

23h 20m

1 stop

9:20 am - 6:30 pm

SYD

SEA

26h 10m

1 stop

$1,045Air Canada

Wed, Jun 3 - Sun, Jun 7

7:20 pm - 7:20 am

SEA

SYD

19h 00m

1 stop

9:20 am - 10:40 pm

SYD

SEA

30h 20m

1 stop

$1,066Singapore Airlines

Sun, May 24 - Sun, Jun 14

6:50 am - 6:45 am

SEA

MEL

30h 55m

1 stop

9:45 am - 9:45 pm

MEL

SEA

29h 00m

1 stop

$1,082American Airlines

Sun, May 24 - Sat, Jun 13

12:57 pm - 6:45 am

SEA

MEL

24h 48m

1 stop

9:45 am - 4:33 pm

MEL

SEA

23h 48m

1 stop

$1,083American Airlines

Mon, Sep 14 - Sat, Oct 3

3:30 pm - 9:15 am

SEA

MEL

23h 45m

1 stop

1:00 pm - 12:12 pm

MEL

SEA

18h 12m

1 stop

$1,088United Airlines

Sun, Oct 18 - Tue, Nov 10

7:05 pm - 8:15 am

SEA

MEL

20h 10m

1 stop

10:55 am - 8:53 pm

MEL

SEA

26h 58m

1 stop

$1,093United Airlines

Fri, Jun 12 - Mon, Jun 22

10:15 am - 5:10 am

SEA

PER

27h 55m

1 stop

1:45 pm - 8:45 am

PER

SEA

34h 00m

1 stop

$1,284Singapore Airlines

Thu, Sep 3 - Sat, Oct 3

Air Canada flights from Seattle to Australia

Our best Air Canada deals on Seattle to Australia flight tickets

Air Canada

May 24

SEA7:20 pmSeattle/Tacoma Intl

19h 00m

1 stop

SYD7:20 amSydney Kingsford Smith

Jun 7

SYD9:20 amSydney Kingsford Smith

26h 10m

1 stop

SEA6:30 pmSeattle/Tacoma Intl

$1,044

Air Canada

Jun 3

SEA3:00 pmSeattle/Tacoma Intl

23h 20m

1 stop

SYD7:20 amSydney Kingsford Smith

Jun 7

SYD9:20 amSydney Kingsford Smith

26h 10m

1 stop

SEA6:30 pmSeattle/Tacoma Intl

$1,045

Air Canada

Jun 3

SEA10:45 amSeattle/Tacoma Intl

27h 35m

1 stop

SYD7:20 amSydney Kingsford Smith

Jun 7

SYD9:20 amSydney Kingsford Smith

26h 10m

1 stop

SEA6:30 pmSeattle/Tacoma Intl

$1,047

American Airlines flights from Seattle to Australia

Our best American Airlines deals on Seattle to Australia flight tickets

American Airlines

May 24

SEA6:50 amSeattle/Tacoma Intl

30h 55m

1 stop

MEL6:45 amMelbourne

Jun 13

MEL9:45 amMelbourne

29h 00m

1 stop

SEA9:45 pmSeattle/Tacoma Intl

$1,082

American Airlines

Sep 14

SEA12:57 pmSeattle/Tacoma Intl

24h 48m

1 stop

MEL6:45 amMelbourne

Oct 3

MEL9:45 amMelbourne

23h 48m

1 stop

SEA4:33 pmSeattle/Tacoma Intl

$1,083

American Airlines

May 20

SEA11:11 amSeattle/Tacoma Intl

26h 34m

2 stops

MEL6:45 amMelbourne

Jun 6

MEL9:45 amMelbourne

21h 12m

1 stop

SEA1:57 pmSeattle/Tacoma Intl

$1,087

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleCoolangatta

SEA - OOL

SEAOOL

Seattle/Tacoma Intl

Tue 8/11

6:10 pm-11:30 am

2 stops24h 20m

Coolangatta Gold Coast

Thu 8/20

12:30 pm-8:42 pm

2 stops25h 12m

$1,007

Quickest round-trip

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Thu 6/11

5:10 pm-6:45 am

1 stop20h 35m

Melbourne

Wed 8/19

9:45 am-1:39 pm

1 stop20h 54m

$1,044

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 5/24

7:20 pm-7:20 am

1 stop19h 00m

Sydney Kingsford Smith

Sun 6/7

9:20 am-6:30 pm

1 stop26h 10m

$1,044

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 6/3

3:00 pm-7:20 am

1 stop23h 20m

Sydney Kingsford Smith

Sun 6/7

9:20 am-6:30 pm

1 stop26h 10m

$1,045

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 5/24

7:20 pm-7:20 am

1 stop19h 00m

Sydney Kingsford Smith

Sun 6/14

9:20 am-10:40 pm

1 stop30h 20m

$1,066

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sun 5/24

6:50 am-6:45 am

1 stop30h 55m

Melbourne

Sat 6/13

9:45 am-9:45 pm

1 stop29h 00m

$1,082

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Mon 9/14

12:57 pm-6:45 am

1 stop24h 48m

Melbourne

Sat 10/3

9:45 am-4:33 pm

1 stop23h 48m

$1,083

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sun 10/18

3:30 pm-9:15 am

1 stop23h 45m

Melbourne

Tue 11/10

1:00 pm-12:12 pm

1 stop18h 12m

$1,088

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Fri 6/12

7:05 pm-8:15 am

1 stop20h 10m

Melbourne

Mon 6/22

10:55 am-8:53 pm

1 stop26h 58m

$1,093

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Thu 9/3

10:15 am-5:10 am

1 stop27h 55m

Perth

Sat 10/3

1:45 pm-8:45 am

1 stop34h 00m

$1,284

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	18h 15m
Direct flights	None

The fastest flight from Seattle to Australia takes 18h 15m

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

Search flight deals

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 12,366 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $385	Free Cancellation	Rating 7.1 11,042 reviews	Search Air Canada flights
ANA	PriceFrom $583	Free Cancellation	Rating 8.3 1,210 reviews	Search ANA flights
Qantas Airways	PriceFrom $647	Free Cancellation	Rating 7.5 1,037 reviews	Search Qantas Airways flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.1 11,663 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 9,718 reviews	Search United Airlines flights
Delta	PriceFrom $842	Free Cancellation	Rating 7.9 8,452 reviews	Search Delta flights
Air New Zealand	PriceFrom $1,116	Free Cancellation	Rating 8.0 642 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.