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 18h 23m.

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

American Airlines, United Airlines, and Air New Zealand 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 May 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.

$793 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.

18:10 - 11:30

SEA

OOL

24h 20m

2 stops

12:30 - 20:42

OOL

SEA

25h 12m

2 stops

$1,389Multiple Airlines

Tue, 11 Aug - Thu, 20 Aug

19:20 - 07:20

SEA

SYD

19h 00m

1 stop

09:20 - 10:05

SYD

SEA

17h 45m

1 stop

$1,396Air Canada

Tue, 2 Jun - Tue, 9 Jun

10:45 - 19:10

SEA

SYD

39h 25m

2 stops

11:45 - 18:30

SYD

SEA

23h 45m

2 stops

$1,444ANA

Wed, 3 Jun - Mon, 15 Jun

15:55 - 06:45

SEA

MEL

21h 50m

1 stop

09:45 - 12:16

MEL

SEA

20h 31m

1 stop

$1,458Qantas Airways

Fri, 25 Sep - Fri, 23 Oct

15:55 - 06:45

SEA

MEL

21h 50m

1 stop

09:45 - 12:16

MEL

SEA

20h 31m

1 stop

$1,459Qantas Airways

Fri, 25 Sep - Fri, 23 Oct

11:43 - 05:00

SEA

MEL

24h 17m

1 stop

09:45 - 13:57

MEL

SEA

21h 12m

1 stop

$1,482American Airlines

Mon, 22 Jun - Mon, 29 Jun

10:45 - 09:25

SEA

SYD

29h 40m

2 stops

11:45 - 18:30

SYD

SEA

23h 45m

2 stops

$1,486ANA

Wed, 10 Jun - Wed, 17 Jun

07:00 - 06:45

SEA

MEL

30h 45m

1 stop

09:45 - 21:45

MEL

SEA

29h 00m

1 stop

$1,493American Airlines

Wed, 1 Jul - Sat, 11 Jul

14:36 - 08:15

SEA

MEL

24h 39m

2 stops

10:55 - 12:34

MEL

SEA

18h 39m

1 stop

$1,497United Airlines

Thu, 4 Jun - Sat, 13 Jun

15:33 - 08:15

SEA

MEL

23h 42m

1 stop

10:55 - 01:29

MEL

SEA

31h 34m

1 stop

$1,498United Airlines

Wed, 27 May - Sun, 14 Jun

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 May

SEA19:20Seattle/Tacoma Intl

19h 00m

1 stop

SYD07:20Sydney Kingsford Smith

24 May

SYD09:20Sydney Kingsford Smith

17h 45m

1 stop

SEA10:05Seattle/Tacoma Intl

$1,366

Air Canada

3 June

SEA05:45Seattle/Tacoma Intl

32h 35m

1 stop

SYD07:20Sydney Kingsford Smith

15 June

SYD09:20Sydney Kingsford Smith

26h 10m

1 stop

SEA18:30Seattle/Tacoma Intl

$1,443

Air Canada

3 June

SEA15:00Seattle/Tacoma Intl

23h 20m

1 stop

SYD07:20Sydney Kingsford Smith

7 June

SYD09:20Sydney Kingsford Smith

26h 10m

1 stop

SEA18:30Seattle/Tacoma Intl

$1,444

ANA flights from State of Washington to Australia

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

ANA

10 June

SEA10:45Seattle/Tacoma Intl

29h 40m

2 stops

SYD09:25Sydney Kingsford Smith

17 June

SYD11:45Sydney Kingsford Smith

23h 45m

2 stops

SEA18:30Seattle/Tacoma Intl

$1,486

ANA

7 June

SEA10:45Seattle/Tacoma Intl

39h 25m

2 stops

SYD19:10Sydney Kingsford Smith

14 June

SYD20:55Sydney Kingsford Smith

34h 30m

1 stop

SEA14:25Seattle/Tacoma Intl

$1,538

ANA

7 June

SEA16:30Seattle/Tacoma Intl

33h 40m

1 stop

SYD19:10Sydney Kingsford Smith

14 June

SYD20:55Sydney Kingsford Smith

34h 30m

1 stop

SEA14:25Seattle/Tacoma Intl

$1,541

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleCoolangatta

SEA - OOL

SEAOOL

Seattle/Tacoma Intl

Tue 11/8

18:10-11:30

2 stops24h 20m

Coolangatta Gold Coast

Thu 20/8

12:30-20:42

2 stops25h 12m

$1,389

Fastest return journey

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 2/6

19:20-07:20

1 stop19h 00m

Sydney Kingsford Smith

Tue 9/6

09:20-10:05

1 stop17h 45m

$1,396

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 3/6

10:45-19:10

2 stops39h 25m

Sydney Kingsford Smith

Mon 15/6

11:45-18:30

2 stops23h 45m

$1,444

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Fri 25/9

15:55-06:45

1 stop21h 50m

Melbourne

Fri 23/10

09:45-12:16

1 stop20h 31m

$1,458

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Fri 25/9

15:55-06:45

1 stop21h 50m

Melbourne

Fri 23/10

09:45-12:16

1 stop20h 31m

$1,459

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Mon 22/6

11:43-05:00

1 stop24h 17m

Melbourne

Mon 29/6

09:45-13:57

1 stop21h 12m

$1,482

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 10/6

10:45-09:25

2 stops29h 40m

Sydney Kingsford Smith

Wed 17/6

11:45-18:30

2 stops23h 45m

$1,486

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Wed 1/7

07:00-06:45

1 stop30h 45m

Melbourne

Sat 11/7

09:45-21:45

1 stop29h 00m

$1,493

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Thu 4/6

14:36-08:15

2 stops24h 39m

Melbourne

Sat 13/6

10:55-12:34

1 stop18h 39m

$1,497

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Wed 27/5

15:33-08:15

1 stop23h 42m

Melbourne

Sun 14/6

10:55-01:29

1 stop31h 34m

$1,498

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, January 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 $134. If you don’t want to visit Australia in January, then you should wait until February to fly from State of Washington, when ticket prices are also cheap, with an average price of $196.

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 $1,440 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 $1,219 on momondo.

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

You could potentially save up to 27% 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.

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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 May 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 $596	Free cancellation	Rating 7.1 11,017 reviews		Search Air Canada flights
United Airlines	PriceFrom $1,102	Free cancellation	Rating 7.4 9,699 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.