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

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

What airlines fly to Australia?

United Airlines, Air Canada and Qantas Airways are the top three most popular airlines that fly to Australia from State of Washington according to our data. United Airlines is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Australia. Keep in mind that there are 12 different airlines that fly to Australia on a routine basis, so you have a few additional options to choose from.

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

Flight times from State of Washington to Australia vary, but if you’re flying out of Seattle and flying into Sydney (one of the most popular routes), then the duration is 18h on average. Another popular route from State of Washington to Australia is flying from Spokane to Sydney, which will take roughly 18h 23m. Keep in mind that layovers or delays could extend your travel time.

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

Prices for flights from Washington to Australia are refreshed on a daily basis.

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

As of May 2026, there are 11 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 offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify 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 license 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.

$469 Cheap Flights from Washington to Australia in 2026

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Find the cheapest flights from Washington to Australia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:20 pm - 7:20 am

SEA

SYD

19h 00m

1 stop

9:20 am - 10:05 am

SYD

SEA

17h 45m

1 stop

$990Air Canada

Mon, May 11 - Sun, May 24

7:20 pm - 7:20 am

SEA

SYD

19h 00m

1 stop

9:20 am - 10:05 am

SYD

SEA

17h 45m

1 stop

$1,012Air Canada

Tue, Jun 2 - Tue, Jun 9

7:20 pm - 7:20 am

SEA

SYD

19h 00m

1 stop

7:00 am - 10:05 am

SYD

SEA

20h 05m

2 stops

$1,020Air Canada

Sun, May 10 - Sun, May 24

10:45 am - 7:10 pm

SEA

SYD

39h 25m

2 stops

11:45 am - 6:30 pm

SYD

SEA

23h 45m

2 stops

$1,047ANA

Wed, Jun 3 - Mon, Jun 15

7:20 pm - 11:55 am

SEA

SYD

23h 35m

2 stops

9:20 am - 6:30 pm

SYD

SEA

26h 10m

1 stop

$1,051Multiple Airlines

Mon, May 11 - Sun, May 24

7:20 pm - 10:55 am

SEA

SYD

22h 35m

2 stops

9:20 am - 6:30 pm

SYD

SEA

26h 10m

1 stop

$1,052Multiple Airlines

Wed, Jun 3 - Mon, Jun 15

3:55 pm - 6:45 am

SEA

MEL

21h 50m

1 stop

9:45 am - 12:16 pm

MEL

SEA

20h 31m

1 stop

$1,057Qantas Airways

Fri, Sep 25 - Fri, Oct 23

3:55 pm - 6:45 am

SEA

MEL

21h 50m

1 stop

9:45 am - 12:16 pm

MEL

SEA

20h 31m

1 stop

$1,058Qantas Airways

Fri, Sep 25 - Fri, Oct 23

1:33 pm - 6:45 am

PDX

MEL

24h 12m

2 stops

9:45 am - 2:04 pm

MEL

PDX

22h 19m

1 stop

$1,073American Airlines

Fri, Sep 25 - Sun, Oct 18

11:40 am - 6:45 am

SEA

MEL

26h 05m

2 stops

9:45 am - 4:32 pm

MEL

SEA

23h 47m

1 stop

$1,074American Airlines

Fri, Jul 24 - Tue, Aug 11

ANA flights from State of Washington to Australia

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

ANA

Jun 3

SEA10:45 amSeattle/Tacoma Intl

39h 25m

2 stops

SYD7:10 pmSydney Kingsford Smith

Jun 15

SYD11:45 amSydney Kingsford Smith

23h 45m

2 stops

SEA6:30 pmSeattle/Tacoma Intl

$1,047

ANA

May 11

SEA4:30 pmSeattle/Tacoma Intl

23h 55m

1 stop

SYD9:25 amSydney Kingsford Smith

May 31

SYD8:55 pmSydney Kingsford Smith

38h 35m

2 stops

SEA6:30 pmSeattle/Tacoma Intl

$1,081

ANA

Jun 7

SEA4:30 pmSeattle/Tacoma Intl

33h 40m

1 stop

SYD7:10 pmSydney Kingsford Smith

Jun 14

SYD8:55 pmSydney Kingsford Smith

34h 30m

1 stop

SEA2:25 pmSeattle/Tacoma Intl

$1,117

United Airlines flights from State of Washington to Australia

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

United Airlines

May 19

SEA7:36 pmSeattle/Tacoma Intl

18h 19m

1 stop

SYD6:55 amSydney Kingsford Smith

Jun 16

SYD9:30 amSydney Kingsford Smith

28h 40m

2 stops

SEA9:10 pmSeattle/Tacoma Intl

$1,090

United Airlines

May 11

SEA7:36 pmSeattle/Tacoma Intl

18h 19m

1 stop

SYD6:55 amSydney Kingsford Smith

May 27

SYD9:30 amSydney Kingsford Smith

28h 40m

2 stops

SEA9:10 pmSeattle/Tacoma Intl

$1,091

United Airlines

May 18

SEA7:36 pmSeattle/Tacoma Intl

19h 39m

1 stop

MEL8:15 amMelbourne

Jun 3

MEL9:30 amMelbourne

28h 40m

2 stops

SEA9:10 pmSeattle/Tacoma Intl

$1,092

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 5/11

7:20 pm-7:20 am

1 stop19h 00m

Sydney Kingsford Smith

Sun 5/24

9:20 am-10:05 am

1 stop17h 45m

$990

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 6/2

7:20 pm-7:20 am

1 stop19h 00m

Sydney Kingsford Smith

Tue 6/9

9:20 am-10:05 am

1 stop17h 45m

$1,012

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 5/10

7:20 pm-7:20 am

1 stop19h 00m

Sydney Kingsford Smith

Sun 5/24

7:00 am-10:05 am

2 stops20h 05m

$1,020

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 6/3

10:45 am-7:10 pm

2 stops39h 25m

Sydney Kingsford Smith

Mon 6/15

11:45 am-6:30 pm

2 stops23h 45m

$1,047

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 5/11

7:20 pm-11:55 am

2 stops23h 35m

Sydney Kingsford Smith

Sun 5/24

9:20 am-6:30 pm

1 stop26h 10m

$1,051

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 6/3

7:20 pm-10:55 am

2 stops22h 35m

Sydney Kingsford Smith

Mon 6/15

9:20 am-6:30 pm

1 stop26h 10m

$1,052

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Fri 9/25

3:55 pm-6:45 am

1 stop21h 50m

Melbourne

Fri 10/23

9:45 am-12:16 pm

1 stop20h 31m

$1,057

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Fri 9/25

3:55 pm-6:45 am

1 stop21h 50m

Melbourne

Fri 10/23

9:45 am-12:16 pm

1 stop20h 31m

$1,058

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Fri 9/25

1:33 pm-6:45 am

2 stops24h 12m

Melbourne

Sun 10/18

9:45 am-2:04 pm

1 stop22h 19m

$1,073

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Fri 7/24

11:40 am-6:45 am

2 stops26h 05m

Melbourne

Tue 8/11

9:45 am-4:32 pm

1 stop23h 47m

$1,074

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 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?

The month of January is, on average, the cheapest month to fly to Australia from State of Washington, with most prices found around $97. If you aren’t able to travel during the month of January, then book flights to Australia from State of Washington during February instead. Flights to Australia in February, while not as cheap as those in January, still average around $142.

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 $1,068 when searching weeks out. 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 $900 on momondo.

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

You could potentially save up to 18% 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 30m
Direct flights	None

The fastest flight from State of Washington to Australia takes 17h 30m

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 are refreshed on a daily basis.
How many operators does momondo search for flights from Washington to Australia?
As of May 2026, there are 11 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 offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify 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 license 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
Alaska Airlines	PriceFrom $97	Free Cancellation	Rating 7.9 12,347 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $385	Free Cancellation	Rating 7.1 11,008 reviews	Search Air Canada flights
ANA	PriceFrom $583	Free Cancellation	Rating 8.3 1,207 reviews	Search ANA flights
Qantas Airways	PriceFrom $621	Free Cancellation	Rating 7.5 1,033 reviews	Search Qantas Airways flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.1 11,670 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $813	Free Cancellation	Rating 7.8 2,837 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $831	Free Cancellation	Rating 7.4 9,694 reviews	Search United Airlines flights
Delta	PriceFrom $842	Free Cancellation	Rating 7.9 8,457 reviews	Search Delta flights
Air New Zealand	PriceFrom $947	Free Cancellation	Rating 8.0 640 reviews	Search Air New Zealand flights
Alaska Airlines	PriceFrom $1,126	Free Cancellation	Rating 0.0	Search Alaska Airlines flights

Why use momondo?

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

Finding the right flight to Australia from Washington is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Australia quick and easy, saving you time and money.

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

All flight searches from Washington to Australia on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Australia from Washington.

I’m not ready to book a flight from Washington 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 Washington and alert you when they change.