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

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

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 50m on average. If you fly from Spokane (another popular airport in State of Washington) to Sydney, then the average flight time is 20h 45m.

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 March 2026, there are 2 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.

$557 Cheap Flights from Washington to Australia in 2026

1 adult

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Find the cheapest flights from Washington to Australia

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

10:10 - 07:05

PDX

BNE

27h 55m

1 stop

10:15 - 09:30

BNE

PDX

16h 15m

1 stop

$1,229Air Canada

Tue, 9 Jun - Tue, 16 Jun

10:10 - 07:05

PDX

BNE

27h 55m

1 stop

10:00 - 14:45

BNE

PDX

21h 45m

1 stop

$1,233Air Canada

Wed, 13 May - Wed, 27 May

19:59 - 06:50

SEA

SYD

41h 51m

1 stop

09:15 - 18:26

SYD

SEA

26h 11m

1 stop

$1,259Delta

Mon, 13 Apr - Mon, 27 Apr

19:59 - 06:50

SEA

SYD

41h 51m

1 stop

09:15 - 23:51

SYD

SEA

31h 36m

1 stop

$1,260Delta

Mon, 13 Apr - Mon, 27 Apr

19:45 - 12:05

PDX

BNE

23h 20m

2 stops

10:00 - 14:51

BNE

PDX

21h 51m

1 stop

$1,273Multiple Airlines

Thu, 10 Sep - Sun, 27 Sep

15:30 - 07:05

PDX

BNE

22h 35m

1 stop

19:25 - 09:30

BNE

PDX

31h 05m

2 stops

$1,275Multiple Airlines

Wed, 13 May - Wed, 27 May

18:14 - 07:05

GEG

SYD

19h 51m

1 stop

09:10 - 22:52

SYD

GEG

30h 42m

1 stop

$1,549Alaska Airlines

Thu, 7 May - Thu, 14 May

17:47 - 07:05

GEG

SYD

20h 18m

1 stop

10:10 - 17:21

SYD

GEG

25h 11m

1 stop

$1,570Alaska Airlines

Tue, 8 Sep - Tue, 6 Oct

13:41 - 07:00

GEG

SYD

24h 19m

2 stops

10:20 - 10:35

SYD

GEG

17h 15m

1 stop

$1,583United Airlines

Mon, 3 Aug - Wed, 12 Aug

12:25 - 06:55

GEG

SYD

25h 30m

1 stop

10:20 - 11:16

SYD

GEG

17h 56m

1 stop

$1,585United Airlines

Thu, 7 May - Thu, 14 May

Delta flights from State of Washington to Australia

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

Delta

13 Apr

SEA19:59Seattle/Tacoma Intl

41h 51m

1 stop

SYD06:50Sydney Kingsford Smith

27 Apr

SYD09:15Sydney Kingsford Smith

26h 11m

1 stop

SEA18:26Seattle/Tacoma Intl

$1,259

Delta

13 Apr

SEA19:59Seattle/Tacoma Intl

41h 51m

1 stop

SYD06:50Sydney Kingsford Smith

27 Apr

SYD09:15Sydney Kingsford Smith

31h 36m

1 stop

SEA23:51Seattle/Tacoma Intl

$1,260

Delta

19 Apr

SEA11:40Seattle/Tacoma Intl

26h 10m

1 stop

SYD06:50Sydney Kingsford Smith

13 May

SYD09:15Sydney Kingsford Smith

20h 08m

1 stop

SEA12:23Seattle/Tacoma Intl

$1,265

Air Canada flights from State of Washington to Australia

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

Air Canada

9 June

PDX10:10Portland

27h 55m

1 stop

BNE07:05Brisbane

16 June

BNE10:15Brisbane

16h 15m

1 stop

PDX09:30Portland

$1,229

Air Canada

13 May

PDX10:10Portland

27h 55m

1 stop

BNE07:05Brisbane

27 May

BNE10:00Brisbane

21h 45m

1 stop

PDX14:45Portland

$1,233

Air Canada

4 Aug

PDX15:30Portland

22h 35m

1 stop

BNE07:05Brisbane

14 Aug

BNE10:00Brisbane

26h 06m

1 stop

PDX19:06Portland

$1,247

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Tue 9/6

10:10-07:05

1 stop27h 55m

Brisbane

Tue 16/6

10:15-09:30

1 stop16h 15m

$1,229

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Wed 13/5

10:10-07:05

1 stop27h 55m

Brisbane

Wed 27/5

10:00-14:45

1 stop21h 45m

$1,233

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 13/4

19:59-06:50

1 stop41h 51m

Sydney Kingsford Smith

Mon 27/4

09:15-18:26

1 stop26h 11m

$1,259

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 13/4

19:59-06:50

1 stop41h 51m

Sydney Kingsford Smith

Mon 27/4

09:15-23:51

1 stop31h 36m

$1,260

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Thu 10/9

19:45-12:05

2 stops23h 20m

Brisbane

Sun 27/9

10:00-14:51

1 stop21h 51m

$1,273

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Wed 13/5

15:30-07:05

1 stop22h 35m

Brisbane

Wed 27/5

19:25-09:30

2 stops31h 05m

$1,275

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 7/5

18:14-07:05

1 stop19h 51m

Sydney Kingsford Smith

Thu 14/5

09:10-22:52

1 stop30h 42m

$1,549

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 8/9

17:47-07:05

1 stop20h 18m

Sydney Kingsford Smith

Tue 6/10

10:10-17:21

1 stop25h 11m

$1,570

Fastest return journey

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 3/8

13:41-07:00

2 stops24h 19m

Sydney Kingsford Smith

Wed 12/8

10:20-10:35

1 stop17h 15m

$1,583

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 7/5

12:25-06:55

1 stop25h 30m

Sydney Kingsford Smith

Thu 14/5

10:20-11:16

1 stop17h 56m

$1,585

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, August 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 $1,183. If you don’t want to visit Australia in August, then you should wait until February to fly from State of Washington, when ticket prices are also cheap, with an average price of $1,230.

How far in advance should I book a flight 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 $1,538 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 $1,295 on momondo.

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

You could potentially save up to 9% 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 50m
Direct flights	None

The fastest flight from State of Washington to Australia takes 17h 50m

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

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 March 2026, there are 2 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 $620	Free cancellation	Rating 7.1 10,838 reviews		Search Air Canada flights
United Airlines	PriceFrom $1,147	Free cancellation	Rating 7.4 9,477 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.