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$377+ Cheap flights from Washington to Australia

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Washington to Australia

Keep the following information in mind while searching for Washington to Australia flight deals. Data was last updated September 15, 2025.

Round-trip from

$815
(Gurufare)

One-way from

$377
(FlightHub)

Popular in

January

Cheapest in

September

Average price

$941
From Washington to Australia
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One-way flight from Washington to Australia
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Highest demand for flights based on searches. 9% potential increase in price ($114 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Washington to Australia

Cheapest flights from Washington to Australia
Explore the most affordable flight options available from Washington to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This American Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/203:40 pmSEA - SYD
1 stop22h 15mAmerican Airlines
Wed 10/112:10 pmSYD - SEA
1 stop23h 59mAmerican Airlines
Deal found 9/14$817
This American Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/213:23 pmSEA - SYD
1 stop23h 07mAmerican Airlines
Tue 10/710:10 amSYD - SEA
1 stop28h 15mAmerican Airlines
Deal found 9/14$818
This American Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2811:44 amSEA - SYD
2 stops27h 16mAmerican Airlines
Tue 11/411:20 amSYD - SEA
2 stops21h 48mAmerican Airlines
Deal found 9/13$819
This Air Canada deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/217:15 pmSEA - SYD
1 stop19h 05mAir Canada
Sun 10/2610:20 amSYD - SEA
1 stop17h 11mAir Canada
Deal found 9/14$820
This American Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/227:40 amSEA - SYD
1 stop30h 25mAmerican Airlines
Wed 10/2911:20 amSYD - SEA
2 stops26h 07mAmerican Airlines
Deal found 9/15$822
This Hawaiian Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:00 amSEA - SYD
1 stop17h 45mHawaiian Airlines
Tue 11/189:40 pmSYD - SEA
1 stop20h 41mHawaiian Airlines
Deal found 9/15$823
This CheapTickets deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapTickets is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/286:30 pmSEA - SYD
1 stop31h 15mHawaiian Airlines
Tue 11/49:40 pmSYD - SEA
1 stop17h 29mHawaiian Airlines
Deal found 9/13$826
This American Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/13:23 pmSEA - SYD
1 stop23h 07mAmerican Airlines
Sat 10/1110:10 amSYD - SEA
1 stop22h 02mAmerican Airlines
Deal found 9/14$828
This Alaska Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/57:00 amSEA - SYD
1 stop17h 45mAlaska Airlines
Thu 11/139:40 pmSYD - SEA
1 stop17h 29mAlaska Airlines
Deal found 9/15$829
This Air Canada deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/217:15 pmSEA - SYD
1 stop19h 05mAir Canada
Tue 11/411:20 amSYD - SEA
1 stop22h 11mAir Canada
Deal found 9/14$830
This American Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/202:42 pmSEA - SYD
1 stop23h 23mAmerican Airlines
Tue 11/411:20 amSYD - SEA
2 stops21h 48mAmerican Airlines
Deal found 9/14$832
This Aunt Betty deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Aunt Betty is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/288:00 pmSEA - MEL
2 stops29h 45mMultiple Airlines
Tue 11/46:00 amMEL - SEA
2 stops22h 31mMultiple Airlines
Deal found 9/13$839

Cheapflights Fare Finder

 
Customize your flight search to find flights from 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, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
Use the filters below to find and compare flights from Washington to Australia that are best for you.

Fly from

Washington

Fly to

Australia

Route

Depart

Return

Price

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 11/8

7:00 am-7:45 pm

1 stop17h 45m

Sydney Kingsford Smith

Tue 11/11

9:40 pm-11:21 pm

1 stop20h 41m

$829

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 2/26

7:20 am-7:45 pm

1 stop17h 25m

Sydney Kingsford Smith

Thu 3/5

9:40 pm-9:45 pm

2 stops19h 05m

$829

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 2/25

7:20 am-7:45 pm

1 stop17h 25m

Sydney Kingsford Smith

Sun 3/8

9:40 pm-7:15 am

2 stops27h 35m

$829

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Fri 2/27

7:20 am-7:45 pm

1 stop17h 25m

Sydney Kingsford Smith

Thu 3/5

9:40 pm-8:15 pm

1 stop17h 35m

$829

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 10/22

7:44 am-7:45 pm

1 stop18h 01m

Sydney Kingsford Smith

Thu 11/20

9:40 pm-7:11 am

2 stops28h 31m

$829

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 2/25

7:20 am-7:45 pm

1 stop17h 25m

Sydney Kingsford Smith

Thu 3/5

9:40 pm-9:45 pm

2 stops19h 05m

$829

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 2/28

7:20 am-7:45 pm

1 stop17h 25m

Sydney Kingsford Smith

Sun 3/8

9:40 pm-10:40 pm

1 stop19h 00m

$829

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 10/19

7:37 pm-7:55 am

1 stop18h 18m

Sydney Kingsford Smith

Sun 11/2

11:20 am-9:51 pm

2 stops28h 31m

$838

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 11/4

12:00 pm-9:05 am

2 stops26h 05m

Sydney Kingsford Smith

Tue 11/11

12:10 pm-1:38 pm

1 stop20h 28m

$844

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 11/24

3:37 pm-9:15 am

1 stop22h 38m

Sydney Kingsford Smith

Sun 12/7

12:10 pm-12:18 pm

1 stop19h 08m

$845

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 60 results
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Best time to book a flight from Washington to Australia

Have a flexible travel schedule? Discover the best time to fly to Australia from Washington with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington to Australia

What is the cheapest month to book a flight from State of Washington to Australia?

Currently, March is the cheapest month in which you can book a flight from State of Washington to Australia (average of $1,032). Flying from State of Washington to Australia in December is currently the most expensive (average of $1,627). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from WA to AU?

Find hourly flight availability from Washington to Australia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

When flying from State of Washington to Australia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Related info for your journey

Find useful and relevant information for your journey from Washington to Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    A quick flight from State of Washington to Australia can take about 17h 45m. Alaska Airlines provides one of the quickest options available for as low as $829. There are 7744 mi between State of Washington and Australia. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from State of Washington to Australia one-way?

    One-way options have recently been found by users for as low as $377 on Qantas Airways. Other airlines that offer cheap prices include Air Canada from $407 and Air New Zealand from $565 one-way.

  • Can I find deals for flights from Washington to Australia that include hotel bookings?

    Yes. In addition to deals on Washington to Australia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Australia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Australia.

  • Can I find deals for business class flights from Washington to Australia?

    Yes. Cheapflights offers flight deals from Washington to Australia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from State of Washington to Australia?

    Currently, March is the cheapest month in which you can book a flight from State of Washington to Australia (average of $1,032). Flying from State of Washington to Australia in December is currently the most expensive (average of $1,627). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 10 airlines flying from Washington to Australia

Discover the top 10 airlines that operate flights from Washington to Australia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$591Average$1,169FlexibilityNo cancel feeOn-time75%
Qantas AirwaysCheapest$647Average$1,226FlexibilityNo cancel feeOn-time74%
Air CanadaCheapest$789Average$1,174FlexibilityNo cancel feeOn-time67%
ANACheapest$794Average$1,083FlexibilityNo cancel feeOn-time80%
American AirlinesCheapest$804Average$996FlexibilityNo cancel feeOn-time71%
Hawaiian AirlinesCheapest$826Average$1,159FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$836Average$1,264FlexibilityNo cancel feeOn-time69%
DeltaCheapest$842Average$1,159FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$1,218Average$1,477FlexibilityNo cancel feeOn-time81%
Qatar AirwaysCheapest$1,315Average$1,712FlexibilityNo cancel feeOn-time68%

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