How long is the flight from State of Washington to Australia?

The flight from State of Washington to Australia depends on which airports you’re departing from and arriving to, and whether or not you have a layover. If you fly from Seattle (a popular airport in State of Washington) to Sydney (the most popular airport in Australia), then the flight time is 20h 56m on average. If you fly from Spokane (another popular airport in State of Washington) to Sydney, then the average flight time is 24h 50m.

What is the cheapest airline that flies from Washington to Australia?

United Airlines, Delta, and Alaska Airlines are the most popular carriers operating from Washington to Australia

When did momondo last update prices for flights from Washington to Australia?

Prices for flights from Washington to Australia were last updated today.

How many operators does momondo search for flights from Washington to Australia?

As of August 2026, there are 3 operators available to choose from for flights from Washington to Australia.

How old do you have to be to fly from Washington to Australia?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Australia.

What documentation or ID do you need to fly to Australia?

The necessary travel and health documents for your Australia trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$738 Cheap Flights from Washington to Australia in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Washington to Australia

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

10:30 - 08:20SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

27h 50m1 stop Vancouver Intl

10:20 - 09:17SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

16h 57m1 stop Vancouver Intl

$1,327Air Canada

Mon, 12 Oct - Tue, 27 Oct

15:15 - 09:35SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

23h 20m1 stop Vancouver Intl

11:20 - 18:22SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

26h 02m1 stop Vancouver Intl

$1,327Air Canada

Wed, 11 Nov - Mon, 30 Nov

15:15 - 09:35SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

23h 20m1 stop Vancouver Intl

11:20 - 18:22SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

26h 02m1 stop Vancouver Intl

$1,327Air Canada

Wed, 11 Nov - Mon, 30 Nov

22:55 - 07:45SEA Seattle/Tacoma Intl-BNE Brisbane

39h 50m1 stop Vancouver Intl

10:45 - 09:27BNE Brisbane-SEA Seattle/Tacoma Intl

16h 42m1 stop Vancouver Intl

$1,403Multiple Airlines

Sun, 25 Oct - Wed, 18 Nov

19:45 - 12:10PDX Portland-MEL Melbourne

22h 25m2 stops Vancouver Intl Sydney Kingsford Smith

06:05 - 09:26MEL Melbourne-PDX Portland

21h 21m2 stops Brisbane Vancouver Intl

$1,413Multiple Airlines

Sun, 18 Oct - Tue, 27 Oct

19:45 - 12:10PDX Portland-MEL Melbourne

22h 25m2 stops Vancouver Intl Sydney Kingsford Smith

06:05 - 09:26MEL Melbourne-PDX Portland

21h 21m2 stops Brisbane Vancouver Intl

$1,414Multiple Airlines

Sun, 11 Oct - Sun, 25 Oct

10:55 - 08:15SEA Seattle/Tacoma Intl-MEL Melbourne

28h 20m1 stop San Francisco

10:55 - 16:14MEL Melbourne-SEA Seattle/Tacoma Intl

22h 19m1 stop San Francisco

$1,478United Airlines

Thu, 20 Aug - Mon, 31 Aug

18:52 - 07:30SEA Seattle/Tacoma Intl-MEL Melbourne

19h 38m1 stop Los Angeles

10:55 - 20:43MEL Melbourne-SEA Seattle/Tacoma Intl

26h 48m1 stop San Francisco

$1,478United Airlines

Wed, 26 Aug - Fri, 11 Sep

14:30 - 06:25PDX Portland-SYD Sydney Kingsford Smith

20h 55m1 stop San Francisco

11:05 - 13:26SYD Sydney Kingsford Smith-PDX Portland

21h 21m2 stops Brisbane Los Angeles

$1,622Qantas Airways

Fri, 29 Jan - Mon, 8 Feb

14:53 - 06:25PDX Portland-SYD Sydney Kingsford Smith

21h 32m1 stop San Francisco

21:50 - 13:50SYD Sydney Kingsford Smith-PDX Portland

35h 00m2 stops Brisbane Los Angeles

$1,788Qantas Airways

Wed, 28 Oct - Sun, 1 Nov

Cheap last-minute flights

Enter your travel dates to find the best prices.

10:40 - 07:05SEA Seattle/Tacoma Intl-BNE Brisbane

27h 25m1 stop Vancouver Intl

10:00 - 10:05BNE Brisbane-SEA Seattle/Tacoma Intl

17h 05m1 stop Vancouver Intl

$1,387Air Canada

Tue, 11 Aug - Wed, 19 Aug

15:00 - 07:05SEA Seattle/Tacoma Intl-BNE Brisbane

23h 05m1 stop Vancouver Intl

10:00 - 22:42BNE Brisbane-SEA Seattle/Tacoma Intl

29h 42m1 stop Vancouver Intl

$1,387Air Canada

Wed, 12 Aug - Wed, 19 Aug

15:00 - 07:05SEA Seattle/Tacoma Intl-BNE Brisbane

23h 05m1 stop Vancouver Intl

10:00 - 10:05BNE Brisbane-SEA Seattle/Tacoma Intl

17h 05m1 stop Vancouver Intl

$1,387Air Canada

Tue, 11 Aug - Wed, 26 Aug

11:40 - 06:45SEA Seattle/Tacoma Intl-MEL Melbourne

26h 05m1 stop Los Angeles

13:35 - 23:21MEL Melbourne-SEA Seattle/Tacoma Intl

26h 46m2 stops Dallas/Fort Worth Los Angeles

$1,434American Airlines

Thu, 13 Aug - Wed, 26 Aug

11:40 - 06:45SEA Seattle/Tacoma Intl-MEL Melbourne

26h 05m1 stop Los Angeles

13:35 - 22:26MEL Melbourne-SEA Seattle/Tacoma Intl

25h 51m1 stop Dallas/Fort Worth

$1,434American Airlines

Thu, 13 Aug - Wed, 26 Aug

17:02 - 06:45SEA Seattle/Tacoma Intl-MEL Melbourne

20h 43m1 stop Los Angeles

13:35 - 23:21MEL Melbourne-SEA Seattle/Tacoma Intl

26h 46m2 stops Dallas/Fort Worth Los Angeles

$1,436American Airlines

Thu, 13 Aug - Wed, 26 Aug

10:55 - 08:15SEA Seattle/Tacoma Intl-MEL Melbourne

28h 20m1 stop San Francisco

09:30 - 11:34MEL Melbourne-SEA Seattle/Tacoma Intl

19h 04m1 stop Los Angeles

$1,468United Airlines

Thu, 13 Aug - Wed, 26 Aug

11:03 - 08:15SEA Seattle/Tacoma Intl-MEL Melbourne

28h 12m2 stops Denver Intl San Francisco

06:00 - 16:14MEL Melbourne-SEA Seattle/Tacoma Intl

27h 14m2 stops Brisbane San Francisco

$1,481United Airlines

Thu, 13 Aug - Wed, 26 Aug

17:02 - 07:05SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

21h 03m1 stop Los Angeles

17:50 - 23:29SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

22h 39m1 stop Los Angeles

$1,523Qantas Airways

Wed, 12 Aug - Sat, 29 Aug

14:39 - 06:45PDX Portland-MEL Melbourne

23h 06m1 stop Los Angeles

09:45 - 13:25MEL Melbourne-PDX Portland

20h 40m1 stop Los Angeles

$1,670Qantas Airways

Thu, 13 Aug - Wed, 26 Aug

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise 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

ANA flights from State of Washington to Australia

Our best ANA deals on State of Washington to Australia flight tickets

ANA

24 Aug

SEA16:30Seattle/Tacoma Intl

23h 55m

1 stop

SYD09:25Sydney Kingsford Smith

30 Aug

SYD20:55Sydney Kingsford Smith

43h 31m

2 stops

SEA23:26Seattle/Tacoma Intl

$1,369

ANA

24 Aug

SEA16:30Seattle/Tacoma Intl

33h 40m

1 stop

SYD19:10Sydney Kingsford Smith

30 Aug

SYD20:55Sydney Kingsford Smith

34h 30m

1 stop

SEA14:25Seattle/Tacoma Intl

$1,450

ANA

11 Aug

SEA16:30Seattle/Tacoma Intl

33h 40m

1 stop

SYD19:10Sydney Kingsford Smith

18 Aug

SYD11:45Sydney Kingsford Smith

23h 47m

2 stops

SEA18:32Seattle/Tacoma Intl

$1,454

Air Canada flights from State of Washington to Australia

Our best Air Canada deals on State of Washington to Australia flight tickets

Air Canada

11 Nov

SEA15:15Seattle/Tacoma Intl

23h 20m

1 stop

SYD09:35Sydney Kingsford Smith

30 Nov

SYD11:20Sydney Kingsford Smith

26h 02m

1 stop

SEA18:22Seattle/Tacoma Intl

$1,327

Air Canada

11 Nov

SEA15:15Seattle/Tacoma Intl

23h 20m

1 stop

SYD09:35Sydney Kingsford Smith

30 Nov

SYD11:20Sydney Kingsford Smith

26h 02m

1 stop

SEA18:22Seattle/Tacoma Intl

$1,328

Air Canada

9 Sept

SEA15:00Seattle/Tacoma Intl

23h 20m

1 stop

SYD07:20Sydney Kingsford Smith

16 Sept

SYD09:20Sydney Kingsford Smith

22h 02m

1 stop

SEA14:22Seattle/Tacoma Intl

$1,329

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Mon 12/10

10:30-08:20

1 stop27h 50m

Sydney Kingsford Smith

Tue 27/10

10:20-09:17

1 stop16h 57m

$1,327

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 11/11

15:15-09:35

1 stop23h 20m

Sydney Kingsford Smith

Mon 30/11

11:20-18:22

1 stop26h 02m

$1,327

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 11/11

15:15-09:35

1 stop23h 20m

Sydney Kingsford Smith

Mon 30/11

11:20-18:22

1 stop26h 02m

$1,327

SeattleBrisbane

SEA Seattle/Tacoma Intl - BNE Brisbane

SEABNE

Seattle/Tacoma Intl

Sun 25/10

22:55-07:45

1 stop39h 50m

Brisbane

Wed 18/11

10:45-09:27

1 stop16h 42m

$1,403

PortlandMelbourne

PDX Portland - MEL Melbourne

PDXMEL

Portland

Sun 18/10

19:45-12:10

2 stops22h 25m

Melbourne

Tue 27/10

06:05-09:26

2 stops21h 21m

$1,413

PortlandMelbourne

PDX Portland - MEL Melbourne

PDXMEL

Portland

Sun 11/10

19:45-12:10

2 stops22h 25m

Melbourne

Sun 25/10

06:05-09:26

2 stops21h 21m

$1,414

SeattleMelbourne

SEA Seattle/Tacoma Intl - MEL Melbourne

SEAMEL

Seattle/Tacoma Intl

Thu 20/8

10:55-08:15

1 stop28h 20m

Melbourne

Mon 31/8

10:55-16:14

1 stop22h 19m

$1,478

SeattleMelbourne

SEA Seattle/Tacoma Intl - MEL Melbourne

SEAMEL

Seattle/Tacoma Intl

Wed 26/8

18:52-07:30

1 stop19h 38m

Melbourne

Fri 11/9

10:55-20:43

1 stop26h 48m

$1,478

Fastest return journey

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Fri 29/1

14:30-06:25

1 stop20h 55m

Sydney Kingsford Smith

Mon 8/2

11:05-13:26

2 stops21h 21m

$1,622

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Wed 28/10

14:53-06:25

1 stop21h 32m

Sydney Kingsford Smith

Sun 1/11

21:50-13:50

2 stops35h 00m

$1,788

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from State of Washington 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

Other information

What is the cheapest month to fly to Australia?

In general, February is the cheapest month to fly from State of Washington to Australia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,373. If you don’t want to visit Australia in February, then you should wait until August to fly from State of Washington, when ticket prices are also cheap, with an average price of $1,508.

How far in advance should I book a flight from Washington to Australia?

You are more likely to see cheaper flights to Australia from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Australia for around $1,568 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Australia from State of Washington for as low as $1,311 on momondo.

Can stopping save me money on State of Washington to Australia flights?

You could potentially save up to 20% on your flight if you consider stops on a State of Washington to Australia flight.

Cheap State of Washington to Australia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Australia

Fastest flight time	17h 45m
Direct flights	None

The fastest flight from State of Washington to Australia takes 17h 45m

There are no direct flights from State of Washington to Australia. There are no popular flight routes from State of Washington to Australia.

Search flight deals

Frequently asked questions about flying from Washington to Australia

When did momondo last update prices for flights from Washington to Australia?
Prices for flights from Washington to Australia were last updated today.
How many operators does momondo search for flights from Washington to Australia?
As of August 2026, there are 3 operators available to choose from for flights from Washington to Australia.
How old do you have to be to fly from Washington to Australia?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Australia.
What documentation or ID do you need to fly to Australia?
The necessary travel and health documents for your Australia trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from State of Washington to Australia

Compare and see reviews for airlines that fly from State of Washington to Australia with momondo

Airline	Rating	Free cancellation	Price
Air Canada	PriceFrom $611	Free cancellation	Rating 7.1 11,460 reviews		Search Air Canada flights
United Airlines	PriceFrom $1,431	Free cancellation	Rating 7.4 10,103 reviews		Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Australia?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington to Australia for you.

Can I find flights from Washington to Australia with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Washington to Australia flights to just show those with flexible booking policies.

How can momondo help me find flights from Washington to Australia?

Once all potential Washington to Australia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Washington to Australia right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Washington to Australia flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.