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Cheap flights from Washington to Australia from $431

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Australia departing on 25/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Cheap return flights

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Multiple Airlines Logo
15:40 - 20:15SEA-SYD
33h 35m1 stop
Multiple Airlines Logo
21:40 - 07:37SYD-SEA
28h 57m1 stop
$1,273Multiple Airlines
Find Deal
Sat, 29 Nov - Sat, 13 Dec
ANA Logo
16:45 - 20:15SEA-SYD
33h 30m1 stop
ANA Logo
21:45 - 14:20SYD-SEA
34h 35m1 stop
$1,279ANA
Find Deal
Sun, 8 Mar - Tue, 17 Mar
Philippine Airlines Logo
21:30 - 09:50SEA-SYD
41h 20m1 stop
Philippine Airlines Logo
11:35 - 19:40SYD-SEA
26h 05m1 stop
$1,299Philippine Airlines
Find Deal
Fri, 6 Mar - Wed, 18 Mar
Air Canada Logo
05:50 - 08:45SEA-BNE
32h 55m1 stop
Air Canada Logo
10:45 - 09:31BNE-SEA
16h 46m1 stop
$1,318Air Canada
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Thu, 27 Nov - Tue, 23 Dec
Air Canada Logo
15:15 - 08:45PDX-BNE
23h 30m1 stop
Air Canada Logo
10:45 - 09:15BNE-PDX
16h 30m1 stop
$1,330Air Canada
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Tue, 20 Jan - Sat, 31 Jan
Alaska Airlines Logo
07:00 - 19:45SEA-SYD
17h 45m1 stop
Alaska Airlines Logo
21:40 - 23:17SYD-SEA
20h 37m1 stop
$1,344Alaska Airlines
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Thu, 13 Nov - Sat, 22 Nov
Hawaiian Airlines Logo
07:00 - 19:45SEA-SYD
17h 45m1 stop
Hawaiian Airlines Logo
21:40 - 05:15SYD-SEA
26h 35m1 stop
$1,370Hawaiian Airlines
Find Deal
Thu, 13 Nov - Sat, 22 Nov
Alaska Airlines Logo
07:00 - 19:45SEA-SYD
17h 45m1 stop
Alaska Airlines Logo
21:40 - 23:17SYD-SEA
20h 37m1 stop
$1,378Alaska Airlines
Find Deal
Wed, 12 Nov - Sat, 22 Nov
Hawaiian Airlines Logo
17:45 - 19:45SEA-SYD
31h 00m1 stop
Hawaiian Airlines Logo
21:40 - 21:02SYD-SEA
18h 22m1 stop
$1,384Hawaiian Airlines
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Sun, 1 Feb - Thu, 5 Feb
Philippine Airlines Logo
21:30 - 09:50SEA-SYD
41h 20m1 stop
Philippine Airlines Logo
11:35 - 18:40SYD-SEA
26h 05m1 stop
$1,448Philippine Airlines
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Thu, 19 Feb - Wed, 4 Mar

ANA flights from State of Washington to Australia

Our best ANA deals on State of Washington to Australia flight tickets
ANA
8 Mar
SEA16:45Seattle/Tacoma Intl
33h 30m
1 stop
SYD20:15Sydney Kingsford Smith
17 Mar
SYD21:45Sydney Kingsford Smith
34h 35m
1 stop
SEA14:20Seattle/Tacoma Intl
$1,279
Find similar
ANA
23 Apr
SEA16:30Seattle/Tacoma Intl
33h 45m
1 stop
SYD19:15Sydney Kingsford Smith
30 Apr
SYD20:55Sydney Kingsford Smith
41h 34m
2 stops
SEA21:29Seattle/Tacoma Intl
$1,301
Find similar
ANA
8 Apr
SEA10:10Seattle/Tacoma Intl
40h 05m
2 stops
SYD19:15Sydney Kingsford Smith
22 Apr
SYD20:55Sydney Kingsford Smith
34h 30m
1 stop
SEA14:25Seattle/Tacoma Intl
$1,364
Find similar

Philippine Airlines flights from State of Washington to Australia

Our best Philippine Airlines deals on State of Washington to Australia flight tickets
Philippine Airlines
6 Mar
SEA21:30Seattle/Tacoma Intl
41h 20m
1 stop
SYD09:50Sydney Kingsford Smith
18 Mar
SYD11:35Sydney Kingsford Smith
26h 05m
1 stop
SEA19:40Seattle/Tacoma Intl
$1,299
Find similar
Philippine Airlines
19 Feb
SEA21:30Seattle/Tacoma Intl
41h 20m
1 stop
SYD09:50Sydney Kingsford Smith
4 Mar
SYD11:35Sydney Kingsford Smith
26h 05m
1 stop
SEA18:40Seattle/Tacoma Intl
$1,448
Find similar
Philippine Airlines
18 Feb
SEA21:30Seattle/Tacoma Intl
41h 20m
1 stop
SYD09:50Sydney Kingsford Smith
11 Mar
SYD11:35Sydney Kingsford Smith
26h 05m
1 stop
SEA19:40Seattle/Tacoma Intl
$1,473
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from State of Washington to Australia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 78,305 searches. Data last updated 27 October 2025.
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

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 29/11

15:40-20:15

1 stop33h 35m

Sydney Kingsford Smith

Sat 13/12

21:40-07:37

1 stop28h 57m

$1,273

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 8/3

16:45-20:15

1 stop33h 30m

Sydney Kingsford Smith

Tue 17/3

21:45-14:20

1 stop34h 35m

$1,279

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Fri 6/3

21:30-09:50

1 stop41h 20m

Sydney Kingsford Smith

Wed 18/3

11:35-19:40

1 stop26h 05m

$1,299

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Thu 27/11

05:50-08:45

1 stop32h 55m

Brisbane

Tue 23/12

10:45-09:31

1 stop16h 46m

$1,318

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Tue 20/1

15:15-08:45

1 stop23h 30m

Brisbane

Sat 31/1

10:45-09:15

1 stop16h 30m

$1,330

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 13/11

07:00-19:45

1 stop17h 45m

Sydney Kingsford Smith

Sat 22/11

21:40-23:17

1 stop20h 37m

$1,344

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 13/11

07:00-19:45

1 stop17h 45m

Sydney Kingsford Smith

Sat 22/11

21:40-05:15

1 stop26h 35m

$1,370

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 12/11

07:00-19:45

1 stop17h 45m

Sydney Kingsford Smith

Sat 22/11

21:40-23:17

1 stop20h 37m

$1,378

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 1/2

17:45-19:45

1 stop31h 00m

Sydney Kingsford Smith

Thu 5/2

21:40-21:02

1 stop18h 22m

$1,384

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 19/2

21:30-09:50

1 stop41h 20m

Sydney Kingsford Smith

Wed 4/3

11:35-18:40

1 stop26h 05m

$1,448

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Australia from

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

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 $1,329. If you don’t want to visit Australia in August, then you should wait until September to fly from State of Washington, when ticket prices are also cheap, with an average price of $1,376.

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

On average, the least expensive day to fly to Australia from State of Washington is on a Monday. momondo users have found tickets for Monday departures for as low as $1,483. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from State of Washington to Australia on a Saturday will generally be more expensive and average around $1,792. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

According to our data, the cheapest time of day to fly to Australia is in the afternoon. momondo users have found flights departing from State of Washington to Australia in the afternoon for as low as $1,416. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Australia are more costly in the morning, with an average ticket price of $1,738. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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 $1,625 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 $1,355 on momondo.

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

You could potentially save up to 7% 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

Direct flights

None
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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  • 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?

  • 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
United AirlinesPriceFrom $1,225Free cancellationRating
7.4
8,999 reviews
Search United Airlines flights
Air CanadaPriceFrom $1,289Free cancellationRating
7.1
10,365 reviews
Search Air Canada 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.

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