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

Philippine Airlines, Air Canada, and Qantas Airways 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 44% of people opting to fly with this airline when traveling to Australia. Keep in mind that there are 11 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 Spokane and flying into Sydney (one of the most popular routes), then the duration is 18h 11m on average. Another popular route from State of Washington to Australia is flying from Seattle to Sydney, which will take roughly 18h 35m. 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 December 2025, there are 9 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.

$377 Cheap Flights from Washington to Australia in 2025/26

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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.

9:50 am - 8:45 am

PDX

BNE

28h 55m1 stop

10:45 am - 9:15 am

BNE

PDX

16h 30m1 stop

$795Air Canada

Sat, Feb 21 - Sun, Mar 1

3:40 pm - 8:45 am

SEA

BNE

23h 05m1 stop

10:45 am - 7:16 pm

BNE

SEA

26h 31m1 stop

$795Air Canada

Tue, Feb 10 - Fri, Feb 27

7:05 pm - 1:25 pm

PDX

BNE

24h 20m2 stops

9:45 am - 9:15 am

BNE

PDX

16h 30m1 stop

$812Multiple Airlines

Thu, Mar 5 - Thu, Mar 19

8:00 pm - 2:20 pm

SEA

BNE

24h 20m2 stops

10:45 am - 7:16 pm

BNE

SEA

26h 31m1 stop

$812Multiple Airlines

Thu, Feb 19 - Wed, Mar 4

6:38 pm - 5:00 am

SEA

BNE

40h 22m1 stop

7:40 pm - 11:59 pm

BNE

SEA

22h 19m1 stop

$837American Airlines

Mon, Feb 2 - Mon, Feb 9

7:16 am - 9:30 am

PDX

MEL

32h 14m1 stop

12:00 pm - 10:08 pm

MEL

PDX

28h 08m1 stop

$944Qantas Airways

Thu, Mar 12 - Wed, Mar 18

3:10 pm - 9:30 am

PDX

MEL

24h 20m2 stops

12:00 pm - 5:33 pm

MEL

PDX

23h 33m1 stop

$958American Airlines

Thu, Mar 19 - Tue, Mar 24

4:51 pm - 10:05 am

PDX

MEL

22h 14m2 stops

12:00 pm - 1:41 pm

MEL

PDX

20h 41m1 stop

$976Qantas Airways

Tue, Feb 3 - Tue, Feb 10

7:30 pm - 10:00 am

SEA

MEL

19h 30m1 stop

11:30 am - 10:13 pm

MEL

SEA

29h 43m1 stop

$1,002United Airlines

Thu, Feb 5 - Thu, Feb 19

7:37 pm - 8:15 am

SEA

MEL

19h 38m1 stop

9:30 am - 9:12 pm

MEL

SEA

28h 42m2 stops

$1,011United Airlines

Tue, Apr 21 - Sun, May 3

Hawaiian Airlines flights from State of Washington to Australia

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

Hawaiian Airlines

Jan 3

PDX5:40 pmPortland

31h 05m

1 stop

SYD7:45 pmSydney Kingsford Smith

Jan 10

SYD9:40 pmSydney Kingsford Smith

26h 33m

2 stops

PDX5:13 amPortland

$1,283

Find similar

Hawaiian Airlines

Jan 3

PDX9:42 pmPortland

27h 03m

2 stops

SYD7:45 pmSydney Kingsford Smith

Jan 10

SYD9:40 pmSydney Kingsford Smith

26h 33m

2 stops

PDX5:13 amPortland

$1,403

Find similar

Cathay Pacific flights from State of Washington to Australia

Our best Cathay Pacific deals on State of Washington to Australia flight tickets

Cathay Pacific

Dec 30

SEA3:49 pmSeattle/Tacoma Intl

44h 21m

2 stops

MEL7:10 amMelbourne

Feb 2

MEL3:35 pmMelbourne

41h 43m

2 stops

SEA2:18 pmSeattle/Tacoma Intl

$1,308

Find similar

Cathay Pacific

Apr 29

PDX10:31 amPortland

53h 09m

2 stops

SYD8:40 amSydney Kingsford Smith

May 10

SYD2:05 pmSydney Kingsford Smith

50h 50m

2 stops

PDX11:55 pmPortland

$1,433

Find similar

Cathay Pacific

Dec 31

SEA7:09 amSeattle/Tacoma Intl

33h 51m

2 stops

SYD12:00 pmSydney Kingsford Smith

Feb 10

SYD7:20 amSydney Kingsford Smith

32h 32m

3 stops

SEA8:52 pmSeattle/Tacoma Intl

$1,665

Find similar

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

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Sat 2/21

9:50 am-8:45 am

1 stop28h 55m

Brisbane

Sun 3/1

10:45 am-9:15 am

1 stop16h 30m

$795

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 2/10

3:40 pm-8:45 am

1 stop23h 05m

Brisbane

Fri 2/27

10:45 am-7:16 pm

1 stop26h 31m

$795

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Thu 3/5

7:05 pm-1:25 pm

2 stops24h 20m

Brisbane

Thu 3/19

9:45 am-9:15 am

1 stop16h 30m

$812

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Thu 2/19

8:00 pm-2:20 pm

2 stops24h 20m

Brisbane

Wed 3/4

10:45 am-7:16 pm

1 stop26h 31m

$812

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Mon 2/2

6:38 pm-5:00 am

1 stop40h 22m

Brisbane

Mon 2/9

7:40 pm-11:59 pm

1 stop22h 19m

$837

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Thu 3/12

7:16 am-9:30 am

1 stop32h 14m

Melbourne

Wed 3/18

12:00 pm-10:08 pm

1 stop28h 08m

$944

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Thu 3/19

3:10 pm-9:30 am

2 stops24h 20m

Melbourne

Tue 3/24

12:00 pm-5:33 pm

1 stop23h 33m

$958

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Tue 2/3

4:51 pm-10:05 am

2 stops22h 14m

Melbourne

Tue 2/10

12:00 pm-1:41 pm

1 stop20h 41m

$976

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Thu 2/5

7:30 pm-10:00 am

1 stop19h 30m

Melbourne

Thu 2/19

11:30 am-10:13 pm

1 stop29h 43m

$1,002

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Tue 4/21

7:37 pm-8:15 am

1 stop19h 38m

Melbourne

Sun 5/3

9:30 am-9:12 pm

2 stops28h 42m

$1,011

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 August is, on average, the cheapest month to fly to Australia from State of Washington, with most prices found around $846. If you aren’t able to travel during the month of August, then book flights to Australia from State of Washington during September instead. Flights to Australia in September, while not as cheap as those in August, still average around $878.

What is the cheapest day to depart on your flight to Australia?

The cheapest day to depart from State of Washington to Australia is on a Tuesday. Travelers who choose to depart for Australia on a Tuesday will often find tickets for as low as $1,078. On the other hand, Thursday is the most expensive day to depart from State of Washington because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,156.

What is the cheapest time of day to depart on your flight to Australia?

Flying to Australia from State of Washington in the evening is the least expensive time of day to depart. momondo users have found prices as low as $1,078 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $1,152 on average. Flights to Australia from State of Washington in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 $1,069 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 $877 on momondo.

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

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 December 2025, there are 9 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 8.0 11,496 reviews	Search Alaska Airlines flights
ANA	PriceFrom $583	Free Cancellation	Rating 8.4 1,034 reviews	Search ANA flights
Qantas Airways	PriceFrom $647	Free Cancellation	Rating 7.5 949 reviews	Search Qantas Airways flights
Philippine Airlines	PriceFrom $758	Free Cancellation	Rating 7.3 943 reviews	Search Philippine Airlines flights
Air Canada	PriceFrom $779	Free Cancellation	Rating 7.1 10,551 reviews	Search Air Canada flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.2 11,051 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $812	Free Cancellation	Rating 7.8 2,821 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $830	Free Cancellation	Rating 7.4 9,102 reviews	Search United Airlines flights
Delta	PriceFrom $842	Free Cancellation	Rating 7.9 8,013 reviews	Search Delta flights
Singapore Airlines	PriceFrom $1,265	Free Cancellation	Rating 8.1 1,414 reviews	Search Singapore 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.