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Cheap flights from Washington to Australia from $562

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 19/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap return flights

Air Canada Logo
19:15 - 08:20SEA-SYD
19h 05m1 stop
Air Canada Logo
10:20 - 09:31SYD-SEA
17h 11m1 stop
$1,088Air Canada
Find Deal
Sun, 19 Oct - Sun, 26 Oct
Air Canada Logo
05:30 - 07:20SEA-SYD
32h 50m1 stop
Air Canada Logo
09:20 - 22:16SYD-SEA
29h 56m1 stop
$1,103Air Canada
Find Deal
Sat, 30 Aug - Sun, 14 Sep
Logo
20:00 - 13:00SEA-SYD
22h 00m2 stops
Logo
11:20 - 19:16SYD-SEA
26h 56m1 stop
$1,144
Find Deal
Sun, 2 Nov - Sun, 16 Nov
Logo
15:40 - 09:35SEA-SYD
22h 55m1 stop
Logo
07:45 - 09:31SYD-SEA
20h 46m2 stops
$1,157
Find Deal
Tue, 25 Nov - Wed, 10 Dec
United Airlines Logo
11:10 - 07:00SEA-SYD
26h 50m2 stops
United Airlines Logo
09:30 - 17:51SYD-SEA
25h 21m2 stops
$1,192United Airlines
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Sat, 30 Aug - Sun, 14 Sep
United Airlines Logo
17:35 - 06:55SEA-SYD
20h 20m1 stop
United Airlines Logo
09:30 - 15:52SYD-SEA
23h 22m2 stops
$1,198United Airlines
Find Deal
Sat, 30 Aug - Sun, 14 Sep
Qantas Airways Logo
15:23 - 07:05SEA-SYD
22h 42m1 stop
Qantas Airways Logo
09:10 - 12:54SYD-SEA
20h 44m1 stop
$1,264Qantas Airways
Find Deal
Tue, 9 Sep - Tue, 16 Sep
Qantas Airways Logo
16:59 - 07:05SEA-SYD
21h 06m1 stop
Qantas Airways Logo
18:45 - 23:01SYD-SEA
22h 16m1 stop
$1,266Qantas Airways
Find Deal
Wed, 1 Oct - Sat, 11 Oct
American Airlines Logo
14:32 - 07:30SEA-SYD
23h 58m1 stop
American Airlines Logo
12:10 - 16:53SYD-SEA
21h 43m1 stop
$1,267American Airlines
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Sun, 24 Aug - Fri, 12 Sep
American Airlines Logo
14:55 - 09:00SEA-SYD
23h 05m2 stops
American Airlines Logo
11:15 - 14:08SYD-SEA
21h 53m2 stops
$1,272American Airlines
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Mon, 3 Nov - Mon, 24 Nov

Air Canada flights from State of Washington to Australia

Our best Air Canada deals on State of Washington to Australia flight tickets
Air Canada
19 Oct
SEA19:15Seattle/Tacoma Intl
19h 05m
1 stop
SYD08:20Sydney Kingsford Smith
26 Oct
SYD10:20Sydney Kingsford Smith
17h 11m
1 stop
SEA09:31Seattle/Tacoma Intl
$1,088
Find similar
Air Canada
30 Aug
SEA05:30Seattle/Tacoma Intl
32h 50m
1 stop
SYD07:20Sydney Kingsford Smith
14 Sept
SYD09:20Sydney Kingsford Smith
29h 56m
1 stop
SEA22:16Seattle/Tacoma Intl
$1,103
Find similar
Air Canada
19 Oct
SEA14:55Seattle/Tacoma Intl
23h 25m
1 stop
SYD08:20Sydney Kingsford Smith
26 Oct
SYD08:00Sydney Kingsford Smith
19h 31m
2 stops
SEA09:31Seattle/Tacoma Intl
$1,111
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
30 Aug
SEA11:10Seattle/Tacoma Intl
26h 50m
2 stops
SYD07:00Sydney Kingsford Smith
14 Sept
SYD09:30Sydney Kingsford Smith
25h 21m
2 stops
SEA17:51Seattle/Tacoma Intl
$1,192
Find similar
United Airlines
30 Aug
SEA17:35Seattle/Tacoma Intl
20h 20m
1 stop
SYD06:55Sydney Kingsford Smith
14 Sept
SYD09:30Sydney Kingsford Smith
23h 22m
2 stops
SEA15:52Seattle/Tacoma Intl
$1,198
Find similar
United Airlines
30 Aug
SEA17:14Seattle/Tacoma Intl
20h 46m
1 stop
SYD07:00Sydney Kingsford Smith
14 Sept
SYD10:20Sydney Kingsford Smith
28h 02m
2 stops
SEA21:22Seattle/Tacoma Intl
$1,247
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 11 August 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

Sun 19/10

19:15-08:20

1 stop19h 05m

Sydney Kingsford Smith

Sun 26/10

10:20-09:31

1 stop17h 11m

$1,088

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 30/8

05:30-07:20

1 stop32h 50m

Sydney Kingsford Smith

Sun 14/9

09:20-22:16

1 stop29h 56m

$1,103

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 2/11

20:00-13:00

2 stops22h 00m

Sydney Kingsford Smith

Sun 16/11

11:20-19:16

1 stop26h 56m

$1,144

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 25/11

15:40-09:35

1 stop22h 55m

Sydney Kingsford Smith

Wed 10/12

07:45-09:31

2 stops20h 46m

$1,157

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 30/8

11:10-07:00

2 stops26h 50m

Sydney Kingsford Smith

Sun 14/9

09:30-17:51

2 stops25h 21m

$1,192

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 30/8

17:35-06:55

1 stop20h 20m

Sydney Kingsford Smith

Sun 14/9

09:30-15:52

2 stops23h 22m

$1,198

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 9/9

15:23-07:05

1 stop22h 42m

Sydney Kingsford Smith

Tue 16/9

09:10-12:54

1 stop20h 44m

$1,264

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 1/10

16:59-07:05

1 stop21h 06m

Sydney Kingsford Smith

Sat 11/10

18:45-23:01

1 stop22h 16m

$1,266

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 24/8

14:32-07:30

1 stop23h 58m

Sydney Kingsford Smith

Fri 12/9

12:10-16:53

1 stop21h 43m

$1,267

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 3/11

14:55-09:00

2 stops23h 05m

Sydney Kingsford Smith

Mon 24/11

11:15-14:08

2 stops21h 53m

$1,272

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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, February 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 $1,518. If you don’t want to visit Australia in February, then you should wait until March to fly from State of Washington, when ticket prices are also cheap, with an average price of $1,586.

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 $1,481. 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 $1,790. 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 $1,414. 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 $1,736. 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 $1,715 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 $1,497 on momondo.

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

You could potentially save up to 10% 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

$562

Fastest flight time

17h 45m

Direct flights

None

Airports in Australia

4 airports
The best one-way flight to Australia from State of Washington in the past 72 hours is $562. The best return flight deal from State of Washington to Australia found on momondo in the last 72 hours is $1,088.
The fastest flight from State of Washington to Australia takes 17h 45m
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 - Brisbane Airport.
There are 4 airports near Australia: Melbourne Avalon (AVV), Melbourne (MEL), Brisbane (BNE), 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 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 $1,224Free cancellationRating
7.4
8,920 reviews
Search United Airlines flights
Air CanadaPriceFrom $1,288Free cancellationRating
7.1
9,915 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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