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 41% 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 and Philippine 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 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.

$373 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.

3:40 pm - 8:45 am

SEA

BNE

23h 05m

1 stop

10:45 am - 3:01 pm

BNE

SEA

22h 16m

1 stop

$751Air Canada

Tue, Mar 3 - Fri, Mar 6

10:10 am - 7:45 am

SEA

BNE

28h 35m

1 stop

10:00 am - 3:05 pm

BNE

SEA

22h 05m

1 stop

$752Air Canada

Thu, Mar 19 - Wed, Apr 29

4:30 pm - 9:25 am

SEA

SYD

23h 55m

1 stop

8:55 pm - 2:25 pm

SYD

SEA

34h 30m

1 stop

$906ANA

Mon, May 18 - Mon, Jun 1

5:59 pm - 6:50 am

SEA

SYD

19h 51m

1 stop

9:15 am - 12:35 pm

SYD

SEA

20h 20m

1 stop

$914Delta

Sun, Apr 19 - Mon, May 11

11:10 am - 6:50 am

SEA

SYD

26h 40m

2 stops

9:15 am - 10:38 am

SYD

SEA

18h 23m

1 stop

$918Delta

Sun, Apr 19 - Mon, May 11

4:30 pm - 7:15 pm

SEA

SYD

33h 45m

1 stop

8:55 pm - 2:25 pm

SYD

SEA

34h 30m

1 stop

$920ANA

Mon, May 4 - Mon, May 18

7:05 pm - 9:45 pm

SEA

HBA

32h 40m

2 stops

6:00 am - 6:53 pm

HBA

SEA

30h 53m

2 stops

$1,309Qantas Airways

Sun, Mar 8 - Thu, Mar 12

5:50 pm - 1:40 pm

SEA

ADL

25h 20m

2 stops

4:30 pm - 6:53 pm

ADL

SEA

43h 53m

2 stops

$1,312Qantas Airways

Sat, Mar 7 - Wed, Mar 11

7:36 pm - 11:55 am

SEA

HBA

23h 19m

2 stops

6:25 am - 9:10 pm

HBA

SEA

31h 45m

3 stops

$1,489United Airlines

Fri, May 8 - Sun, May 24

11:35 am - 1:35 pm

SEA

CBR

32h 00m

2 stops

6:50 pm - 9:06 pm

CBR

SEA

43h 16m

3 stops

$1,718United Airlines

Thu, Apr 2 - Thu, Apr 9

Qantas Airways flights from Seattle to Australia

Our best Qantas Airways deals on Seattle to Australia flight tickets

Qantas Airways

Mar 5

SEA6:32 amSeattle/Tacoma Intl

31h 58m

1 stop

MEL9:30 amMelbourne

Apr 6

MEL9:45 amMelbourne

29h 57m

1 stop

SEA10:42 pmSeattle/Tacoma Intl

$1,081

Qantas Airways

Apr 25

SEA7:06 pmSeattle/Tacoma Intl

42h 39m

1 stop

MEL6:45 amMelbourne

May 1

MEL4:45 pmMelbourne

23h 44m

2 stops

SEA11:29 pmSeattle/Tacoma Intl

$1,085

Qantas Airways

Apr 30

SEA5:06 pmSeattle/Tacoma Intl

24h 24m

2 stops

SYD10:30 amSydney Kingsford Smith

May 19

SYD9:25 pmSydney Kingsford Smith

18h 40m

1 stop

SEA11:05 pmSeattle/Tacoma Intl

$1,091

Air Canada flights from Seattle to Australia

Our best Air Canada deals on Seattle to Australia flight tickets

Air Canada

Mar 3

SEA3:40 pmSeattle/Tacoma Intl

23h 05m

1 stop

BNE8:45 amBrisbane

Mar 6

BNE10:45 amBrisbane

22h 16m

1 stop

SEA3:01 pmSeattle/Tacoma Intl

$751

Air Canada

Mar 10

SEA8:00 pmSeattle/Tacoma Intl

18h 45m

1 stop

BNE7:45 amBrisbane

May 10

BNE10:00 amBrisbane

16h 15m

1 stop

SEA9:15 amSeattle/Tacoma Intl

$752

Air Canada

Mar 10

SEA3:40 pmSeattle/Tacoma Intl

23h 05m

1 stop

BNE7:45 amBrisbane

May 10

BNE10:00 amBrisbane

25h 30m

1 stop

SEA6:30 pmSeattle/Tacoma Intl

$753

Fly from

Fly to

Route

Depart

Return

Price

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 3/3

3:40 pm-8:45 am

1 stop23h 05m

Brisbane

Fri 3/6

10:45 am-3:01 pm

1 stop22h 16m

$751

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Thu 3/19

10:10 am-7:45 am

1 stop28h 35m

Brisbane

Wed 4/29

10:00 am-3:05 pm

1 stop22h 05m

$752

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 5/18

4:30 pm-9:25 am

1 stop23h 55m

Sydney Kingsford Smith

Mon 6/1

8:55 pm-2:25 pm

1 stop34h 30m

$906

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 4/19

5:59 pm-6:50 am

1 stop19h 51m

Sydney Kingsford Smith

Mon 5/11

9:15 am-12:35 pm

1 stop20h 20m

$914

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 4/19

11:10 am-6:50 am

2 stops26h 40m

Sydney Kingsford Smith

Mon 5/11

9:15 am-10:38 am

1 stop18h 23m

$918

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 5/4

4:30 pm-7:15 pm

1 stop33h 45m

Sydney Kingsford Smith

Mon 5/18

8:55 pm-2:25 pm

1 stop34h 30m

$920

SeattleHobart

SEA - HBA

SEAHBA

Seattle/Tacoma Intl

Sun 3/8

7:05 pm-9:45 pm

2 stops32h 40m

Hobart

Thu 3/12

6:00 am-6:53 pm

2 stops30h 53m

$1,309

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 3/7

5:50 pm-1:40 pm

2 stops25h 20m

Adelaide

Wed 3/11

4:30 pm-6:53 pm

2 stops43h 53m

$1,312

SeattleHobart

SEA - HBA

SEAHBA

Seattle/Tacoma Intl

Fri 5/8

7:36 pm-11:55 am

2 stops23h 19m

Hobart

Sun 5/24

6:25 am-9:10 pm

3 stops31h 45m

$1,489

SeattleCanberra

SEA - CBR

SEACBR

Seattle/Tacoma Intl

Thu 4/2

11:35 am-1:35 pm

2 stops32h 00m

Canberra

Thu 4/9

6:50 pm-9:06 pm

3 stops43h 16m

$1,718

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 $1,065 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 14% 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 45m
Direct flights	None

The fastest flight from Seattle to Australia takes 18h 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 11,905 reviews	Search Alaska Airlines flights
ANA	PriceFrom $583	Free Cancellation	Rating 8.4 1,097 reviews	Search ANA flights
Qantas Airways	PriceFrom $647	Free Cancellation	Rating 7.5 995 reviews	Search Qantas Airways flights
Air Canada	PriceFrom $779	Free Cancellation	Rating 7.1 10,732 reviews	Search Air Canada flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.2 11,320 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $812	Free Cancellation	Rating 7.8 2,833 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $821	Free Cancellation	Rating 7.4 9,322 reviews	Search United Airlines flights
Delta	PriceFrom $842	Free Cancellation	Rating 7.9 8,214 reviews	Search Delta flights
Alaska Airlines	PriceFrom $1,126	Free Cancellation	Rating 0.0	Search Alaska Airlines flights
Singapore Airlines	PriceFrom $1,251	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.