What airlines fly to Australia?

United Airlines, Air Canada and Delta 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 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 Seattle and flying into Sydney (one of the most popular routes), then the duration is 18h 21m on average. Another popular route from State of Washington to Australia is flying from Spokane to Sydney, which will take roughly 19h 39m. Keep in mind that layovers or delays could extend your travel time.

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

Air Canada, Qantas Airways, and United Airlines 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 are refreshed on a daily basis.

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

As of August 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.

$366 Cheap Flights from Washington to Australia in 2025

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Find the cheapest flights from Washington to Australia

Round-trip

One-way

Last minute

Cheap round-trip flights

10:00 am - 8:20 amSEA-SYD

28h 20m1 stop

10:20 am - 9:31 amSYD-SEA

17h 11m1 stop

$709Air Canada

Find Deal

dom., oct. 19 - lun., oct. 27

7:15 pm - 8:20 amSEA-SYD

19h 05m1 stop

10:20 am - 9:31 amSYD-SEA

17h 11m1 stop

$710Air Canada

Find Deal

dom., oct. 19 - lun., oct. 27

8:00 pm - 1:00 pmSEA-SYD

22h 00m2 stops

11:20 am - 7:16 pmSYD-SEA

26h 56m1 stop

$746

Find Deal

dom., nov. 2 - dom., nov. 16

8:00 pm - 9:35 amSEA-SYD

18h 35m1 stop

6:25 am - 9:21 amSYD-SEA

19h 56m2 stops

$751

Find Deal

mar., feb. 3 - mar., jul. 7

2:42 pm - 8:05 amSEA-SYD

23h 23m1 stop

5:45 pm - 6:03 pmSYD-SEA

19h 18m1 stop

$820Qantas Airways

Find Deal

lun., oct. 20 - mar., nov. 4

1:10 pm - 8:05 amSEA-SYD

24h 55m1 stop

5:45 pm - 6:03 pmSYD-SEA

19h 18m1 stop

$821Qantas Airways

Find Deal

mié., oct. 15 - sáb., nov. 8

2:55 pm - 9:00 amSEA-SYD

23h 05m2 stops

11:15 am - 2:08 pmSYD-SEA

21h 53m2 stops

$830American Airlines

Find Deal

lun., nov. 3 - lun., nov. 24

2:42 pm - 7:30 amSEA-SYD

22h 48m1 stop

11:15 am - 2:08 pmSYD-SEA

21h 53m2 stops

$831American Airlines

Find Deal

lun., oct. 20 - mar., nov. 4

7:00 am - 7:00 amPDX-SYD

29h 00m1 stop

12:10 pm - 8:38 pmSYD-PDX

27h 28m1 stop

$968United Airlines

Find Deal

jue., nov. 6 - vie., nov. 21

10:55 am - 7:00 amPDX-SYD

27h 05m2 stops

9:30 am - 3:05 pmSYD-PDX

22h 35m2 stops

$973United Airlines

Find Deal

vie., sep. 5 - vie., sep. 19

Air Canada flights from State of Washington to Australia

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

Air Canada

Oct 19

SEA10:00 amSeattle/Tacoma Intl

28h 20m

1 stop

SYD8:20 amSydney Kingsford Smith

Oct 27

SYD10:20 amSydney Kingsford Smith

17h 11m

1 stop

SEA9:31 amSeattle/Tacoma Intl

$709

Find similar

Air Canada

Oct 19

SEA7:15 pmSeattle/Tacoma Intl

19h 05m

1 stop

SYD8:20 amSydney Kingsford Smith

Oct 27

SYD10:20 amSydney Kingsford Smith

17h 11m

1 stop

SEA9:31 amSeattle/Tacoma Intl

$710

Find similar

Air Canada

Aug 30

SEA5:30 amSeattle/Tacoma Intl

32h 50m

1 stop

SYD7:20 amSydney Kingsford Smith

Sep 14

SYD9:20 amSydney Kingsford Smith

17h 02m

1 stop

SEA9:22 amSeattle/Tacoma Intl

$718

Find similar

United Airlines flights from State of Washington to Australia

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

United Airlines

Aug 20

SEA2:29 pmSeattle/Tacoma Intl

23h 26m

1 stop

SYD6:55 amSydney Kingsford Smith

Aug 24

SYD9:30 amSydney Kingsford Smith

21h 00m

1 stop

SEA1:30 pmSeattle/Tacoma Intl

$851

Find similar

United Airlines

Aug 9

SEA7:34 pmSeattle/Tacoma Intl

18h 21m

1 stop

SYD6:55 amSydney Kingsford Smith

Aug 11

SYD9:30 amSydney Kingsford Smith

21h 16m

1 stop

SEA1:46 pmSeattle/Tacoma Intl

$860

Find similar

United Airlines

Aug 9

SEA5:14 pmSeattle/Tacoma Intl

20h 46m

1 stop

SYD7:00 amSydney Kingsford Smith

Aug 11

SYD9:30 amSydney Kingsford Smith

29h 03m

2 stops

SEA9:33 pmSeattle/Tacoma Intl

$865

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

dom. 10/19

10:00 am-8:20 am

1 stop28h 20m

Sydney Kingsford Smith

lun. 10/27

10:20 am-9:31 am

1 stop17h 11m

$709

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

dom. 10/19

7:15 pm-8:20 am

1 stop19h 05m

Sydney Kingsford Smith

lun. 10/27

10:20 am-9:31 am

1 stop17h 11m

$710

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

dom. 11/2

8:00 pm-1:00 pm

2 stops22h 00m

Sydney Kingsford Smith

dom. 11/16

11:20 am-7:16 pm

1 stop26h 56m

$746

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

mar. 2/3

8:00 pm-9:35 am

1 stop18h 35m

Sydney Kingsford Smith

mar. 7/7

6:25 am-9:21 am

2 stops19h 56m

$751

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

lun. 10/20

2:42 pm-8:05 am

1 stop23h 23m

Sydney Kingsford Smith

mar. 11/4

5:45 pm-6:03 pm

1 stop19h 18m

$820

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

mié. 10/15

1:10 pm-8:05 am

1 stop24h 55m

Sydney Kingsford Smith

sáb. 11/8

5:45 pm-6:03 pm

1 stop19h 18m

$821

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

lun. 11/3

2:55 pm-9:00 am

2 stops23h 05m

Sydney Kingsford Smith

lun. 11/24

11:15 am-2:08 pm

2 stops21h 53m

$830

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

lun. 10/20

2:42 pm-7:30 am

1 stop22h 48m

Sydney Kingsford Smith

mar. 11/4

11:15 am-2:08 pm

2 stops21h 53m

$831

PortlandSydney

PDX - SYD

PDXSYD

Portland

jue. 11/6

7:00 am-7:00 am

1 stop29h 00m

Sydney Kingsford Smith

vie. 11/21

12:10 pm-8:38 pm

1 stop27h 28m

$968

PortlandSydney

PDX - SYD

PDXSYD

Portland

vie. 9/5

10:55 am-7:00 am

2 stops27h 05m

Sydney Kingsford Smith

vie. 9/19

9:30 am-3:05 pm

2 stops22h 35m

$973

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 February is, on average, the cheapest month to fly to Australia from State of Washington, with most prices found around $999. If you aren’t able to travel during the month of February, then book flights to Australia from State of Washington during March instead. Flights to Australia in March, while not as cheap as those in February, still average around $1,030.

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 $1,124 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 $1,004 on momondo.

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

You could potentially save up to 11% 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	$366
Fastest flight time	17h 52m
Direct flights	None
Airports in Australia	6 airports

The best one-way flight to Australia from State of Washington in the past 72 hours is $366. The best round-trip flight deal from State of Washington to Australia found on momondo in the last 72 hours is $709.

The fastest flight from State of Washington to Australia takes 17h 52m

There are no direct flights from State of Washington to Australia. Popular non-direct routes for this connection are Seattle/Tacoma Intl Airport - Melbourne Airport, Seattle/Tacoma Intl Airport - Sydney Kingsford Smith Airport and Seattle/Tacoma Intl Airport - Canberra Airport.

There are 6 airports near Australia: Melbourne Avalon (AVV), Canberra (CBR), Melbourne (MEL), Brisbane (BNE), Cairns (CNS), Sydney Kingsford Smith (SYD)

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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 August 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 $591	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
Qantas Airways	PriceFrom $647	Free Cancellation	Rating 7.5 888 reviews	Search Qantas Airways flights
ANA	PriceFrom $794	Free Cancellation	Rating 8.4 926 reviews	Search ANA flights
American Airlines	PriceFrom $807	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Air Canada	PriceFrom $832	Free Cancellation	Rating 7.1 9,893 reviews	Search Air Canada flights
United Airlines	PriceFrom $843	Free Cancellation	Rating 7.4 8,917 reviews	Search United Airlines flights
Hawaiian Airlines	PriceFrom $858	Free Cancellation	Rating 7.8 2,631 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $873	Free Cancellation	Rating 8.0 7,985 reviews	Search Delta flights
Singapore Airlines	PriceFrom $1,239	Free Cancellation	Rating 8.1 1,344 reviews	Search Singapore Airlines flights
Qatar Airways	PriceFrom $1,315	Free Cancellation	Rating 7.4 3,606 reviews	Search Qatar Airways 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.