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 17h 45m on average. If you fly from Spokane (another popular airport in State of Washington) to Sydney, then the average flight time is 22h 50m.

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

Philippine Airlines, Alaska Airlines, and Delta 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 November 2026, there is 1 operator 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.

$651 Cheap Flights from Washington to Australia in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Washington to Australia

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One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

23:55 - 09:45SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

40h 50m1 stop Manila Ninoy Aquino Intl

11:35 - 19:35SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

25h 00m1 stop Manila Ninoy Aquino Intl

$1,306Philippine Airlines

Sun, 18 Apr - Sun, 25 Apr

23:55 - 09:45SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

40h 50m1 stop Manila Ninoy Aquino Intl

11:35 - 19:35SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

25h 00m1 stop Manila Ninoy Aquino Intl

$1,309Philippine Airlines

Sun, 18 Apr - Sun, 25 Apr

23:55 - 09:45SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

40h 50m1 stop Manila Ninoy Aquino Intl

11:35 - 19:35SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

25h 00m1 stop Manila Ninoy Aquino Intl

$1,329Philippine Airlines

Sun, 18 Apr - Sun, 25 Apr

23:55 - 09:45SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

40h 50m1 stop Manila Ninoy Aquino Intl

11:35 - 19:35SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

25h 00m1 stop Manila Ninoy Aquino Intl

$1,336Philippine Airlines

Sun, 11 Apr - Sun, 25 Apr

21:30 - 09:50SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

41h 20m1 stop Manila Ninoy Aquino Intl

11:30 - 18:45SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

26h 15m1 stop Manila Ninoy Aquino Intl

$1,341Philippine Airlines

Mon, 22 Feb - Thu, 4 Mar

22:30 - 09:50SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

41h 20m1 stop Manila Ninoy Aquino Intl

11:35 - 19:35SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

25h 00m1 stop Manila Ninoy Aquino Intl

$1,343Philippine Airlines

Wed, 24 Mar - Wed, 21 Apr

23:55 - 09:45SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

40h 50m1 stop Manila Ninoy Aquino Intl

11:35 - 19:35SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

25h 00m1 stop Manila Ninoy Aquino Intl

$1,352Philippine Airlines

Mon, 3 May - Wed, 19 May

21:30 - 09:50SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

41h 20m1 stop Manila Ninoy Aquino Intl

11:30 - 19:45SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

26h 15m1 stop Manila Ninoy Aquino Intl

$1,355Philippine Airlines

Mon, 8 Mar - Thu, 18 Mar

12:23 - 07:30GEG Spokane-BNE Brisbane

25h 07m1 stop San Francisco

11:20 - 11:38BNE Brisbane-GEG Spokane

18h 18m1 stop San Francisco

$1,754United Airlines

Tue, 26 Jan - Tue, 9 Feb

12:23 - 07:30GEG Spokane-BNE Brisbane

25h 07m1 stop San Francisco

11:20 - 11:38BNE Brisbane-GEG Spokane

18h 18m1 stop San Francisco

$1,754United Airlines

Tue, 26 Jan - Sat, 6 Feb

Cheap last-minute flights

Enter your travel dates to find the best prices.

07:00 - 19:45SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

17h 45m1 stop Honolulu

21:40 - 21:25SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

18h 45m1 stop Honolulu

$1,725Multiple Airlines

Mon, 16 Nov - Tue, 24 Nov

07:00 - 19:45SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

17h 45m1 stop Honolulu

21:40 - 07:18SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

28h 38m2 stops Honolulu Lihue

$1,725Multiple Airlines

Mon, 16 Nov - Tue, 24 Nov

18:35 - 19:45SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

30h 10m1 stop Honolulu

21:40 - 21:25SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

18h 45m1 stop Honolulu

$1,751Multiple Airlines

Sun, 15 Nov - Tue, 24 Nov

06:00 - 06:30GEG Spokane-BNE Brisbane

30h 30m1 stop Dallas/Fort Worth

09:40 - 22:32BNE Brisbane-GEG Spokane

30h 52m1 stop Dallas/Fort Worth

$1,767American Airlines

Tue, 17 Nov - Fri, 25 Dec

16:10 - 07:30GEG Spokane-BNE Brisbane

45h 20m2 stops Denver Intl San Francisco

11:20 - 20:51BNE Brisbane-GEG Spokane

27h 31m2 stops San Francisco Denver Intl

$1,786United Airlines

Tue, 17 Nov - Fri, 25 Dec

16:10 - 07:30GEG Spokane-BNE Brisbane

45h 20m2 stops Denver Intl San Francisco

11:20 - 21:15BNE Brisbane-GEG Spokane

27h 55m1 stop San Francisco

$1,797United Airlines

Tue, 17 Nov - Fri, 25 Dec

07:00 - 19:45SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

17h 45m1 stop Honolulu

21:40 - 07:18SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

28h 38m2 stops Honolulu Lihue

$1,798Multiple Airlines

Thu, 12 Nov - Tue, 24 Nov

07:00 - 19:45SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

17h 45m1 stop Honolulu

21:40 - 21:25SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

18h 45m1 stop Honolulu

$1,798Multiple Airlines

Fri, 13 Nov - Tue, 24 Nov

07:00 - 19:45SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

17h 45m1 stop Honolulu

21:40 - 20:20SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

17h 40m1 stop Honolulu

$1,798Multiple Airlines

Thu, 12 Nov - Tue, 24 Nov

07:00 - 19:45SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

17h 45m1 stop Honolulu

21:40 - 07:18SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

28h 38m2 stops Honolulu Lihue

$1,798Multiple Airlines

Fri, 13 Nov - Tue, 24 Nov

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Qantas Airways flights from State of Washington to Australia

Our best Qantas Airways deals on State of Washington to Australia flight tickets

Qantas Airways

8 Feb

GEG18:18Spokane

19h 42m

1 stop

SYD09:00Sydney Kingsford Smith

16 Feb

SYD14:05Sydney Kingsford Smith

25h 50m

1 stop

GEG20:55Spokane

$1,842

Qantas Airways

20 Nov

SEA13:38Seattle/Tacoma Intl

22h 12m

1 stop

BNE05:50Brisbane

30 Nov

BNE13:10Brisbane

39h 51m

1 stop

SEA11:01Seattle/Tacoma Intl

$1,843

Qantas Airways

6 Feb

GEG18:18Spokane

41h 07m

1 stop

SYD06:25Sydney Kingsford Smith

16 Feb

SYD14:05Sydney Kingsford Smith

25h 50m

1 stop

GEG20:55Spokane

$1,906

Philippine Airlines flights from State of Washington to Australia

Our best Philippine Airlines deals on State of Washington to Australia flight tickets

Philippine Airlines

18 Apr

SEA23:55Seattle/Tacoma Intl

40h 50m

1 stop

SYD09:45Sydney Kingsford Smith

25 Apr

SYD11:35Sydney Kingsford Smith

25h 00m

1 stop

SEA19:35Seattle/Tacoma Intl

$1,306

Philippine Airlines

18 Apr

SEA23:55Seattle/Tacoma Intl

40h 50m

1 stop

SYD09:45Sydney Kingsford Smith

25 Apr

SYD11:35Sydney Kingsford Smith

25h 00m

1 stop

SEA19:35Seattle/Tacoma Intl

$1,308

Philippine Airlines

18 Apr

SEA23:55Seattle/Tacoma Intl

40h 50m

1 stop

SYD09:45Sydney Kingsford Smith

25 Apr

SYD11:35Sydney Kingsford Smith

25h 00m

1 stop

SEA19:35Seattle/Tacoma Intl

$1,329

momondo Fare Finder

Use the filters below to find and compare flights from Washington to Australia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sun 18/4

23:55-09:45

1 stop40h 50m

Sydney Kingsford Smith

Sun 25/4

11:35-19:35

1 stop25h 00m

$1,306

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sun 18/4

23:55-09:45

1 stop40h 50m

Sydney Kingsford Smith

Sun 25/4

11:35-19:35

1 stop25h 00m

$1,308

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sun 18/4

23:55-09:45

1 stop40h 50m

Sydney Kingsford Smith

Sun 25/4

11:35-19:35

1 stop25h 00m

$1,329

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sun 11/4

23:55-09:45

1 stop40h 50m

Sydney Kingsford Smith

Sun 25/4

11:35-19:35

1 stop25h 00m

$1,336

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Mon 22/2

21:30-09:50

1 stop41h 20m

Sydney Kingsford Smith

Thu 4/3

11:30-18:45

1 stop26h 15m

$1,341

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 24/3

22:30-09:50

1 stop41h 20m

Sydney Kingsford Smith

Wed 21/4

11:35-19:35

1 stop25h 00m

$1,343

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Mon 3/5

23:55-09:45

1 stop40h 50m

Sydney Kingsford Smith

Wed 19/5

11:35-19:35

1 stop25h 00m

$1,352

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Mon 8/3

21:30-09:50

1 stop41h 20m

Sydney Kingsford Smith

Thu 18/3

11:30-19:45

1 stop26h 15m

$1,355

Fastest return journey

SpokaneBrisbane

GEG Spokane - BNE Brisbane

GEGBNE

Spokane

Tue 26/1

12:23-07:30

1 stop25h 07m

Brisbane

Tue 9/2

11:20-11:38

1 stop18h 18m

$1,754

SpokaneBrisbane

GEG Spokane - BNE Brisbane

GEGBNE

Spokane

Tue 26/1

12:23-07:30

1 stop25h 07m

Brisbane

Sat 6/2

11:20-11:38

1 stop18h 18m

$1,754

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 $1,543. If you don’t want to visit Australia in February, then you should wait until April to fly from State of Washington, when ticket prices are also cheap, with an average price of $1,617.

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 $1,759 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 $1,457 on momondo.

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

You could potentially save up to 5% 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

Best price found	$651
Fastest flight time	17h 45m
Direct flights	None

The best one-way flight to Australia from State of Washington in the past 72 hours is $651. The best return flight deal from State of Washington to Australia found on momondo in the last 72 hours is $1,306.

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 November 2026, there is 1 operator 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
United Airlines	PriceFrom $1,474	Free cancellation	Rating 7.3 10,474 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.