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$298+ 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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
Nov 16 — Nov 231
Sun 11/16
Sun 11/23
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 October 17, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$826
(Gurufare)

One-way from

$298
(KAYAK)

Popular in

December

Cheapest in

September

Average price

$971
Provider with most accurate pricing for Seattle/Tacoma Intl-Sydney Kingsford Smith flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Sydney Kingsford Smith flights.
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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. 11% potential increase in price ($136 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 17, 2025.

This Gotogate deal was found by Cheapflights users on 10/16. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/293:40 pmSEA - SYD
1 stop33h 35mMultiple Airlines
Sun 12/149:40 pmSYD - SEA
1 stop26h 35mMultiple Airlines
Deal found 10/16$880
This Vliegwinkel deal was found by Cheapflights users on 10/16. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/178:05 amSEA - BNE
1 stop26h 55mMultiple Airlines
Wed 12/37:40 pmBNE - SEA
1 stop18h 55mMultiple Airlines
Deal found 10/16$898
This Orbitz deal was found by Cheapflights users on 10/16. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/93:40 pmSEA - SYD
1 stop33h 35mMultiple Airlines
Thu 11/1311:20 amSYD - SEA
1 stop17h 11mMultiple Airlines
Deal found 10/16$914
This American Airlines deal was found by Cheapflights users on 10/15. 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 11/126:05 amSEA - BNE
1 stop28h 55mAmerican Airlines
Wed 11/267:40 pmBNE - SEA
1 stop20h 44mAmerican Airlines
Deal found 10/15$914
This Kiwi.com deal was found by Cheapflights users on 10/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/303:40 pmSEA - SYD
1 stop33h 35mMultiple Airlines
Sun 12/79:40 pmSYD - SEA
1 stop19h 29mMultiple Airlines
Deal found 10/16$916
This American Airlines deal was found by Cheapflights users on 10/16. 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 11/175:00 pmSEA - BNE
1 stop43h 30mAmerican Airlines
Wed 12/37:40 pmBNE - SEA
1 stop20h 45mAmerican Airlines
Deal found 10/16$916
This Kiwi.com deal was found by Cheapflights users on 10/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/293:40 pmSEA - SYD
1 stop33h 35mMultiple Airlines
Sat 12/69:40 pmSYD - SEA
1 stop28h 57mMultiple Airlines
Deal found 10/15$917
This American Airlines deal was found by Cheapflights users on 10/16. 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 11/1111:34 amSEA - BNE
1 stop24h 56mAmerican Airlines
Tue 12/27:40 pmBNE - SEA
1 stop20h 44mAmerican Airlines
Deal found 10/16$921
This Kiwi.com deal was found by Cheapflights users on 10/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/23:40 pmSEA - SYD
1 stop33h 35mMultiple Airlines
Sun 12/79:40 pmSYD - SEA
1 stop19h 29mMultiple Airlines
Deal found 10/16$929
This United Airlines deal was found by Cheapflights users on 10/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:28 pmSEA - BNE
1 stop18h 02mUnited Airlines
Wed 11/2611:40 amBNE - SEA
1 stop19h 58mUnited Airlines
Deal found 10/16$936
This United Airlines deal was found by Cheapflights users on 10/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1511:59 pmSEA - BNE
2 stops37h 31mUnited Airlines
Tue 11/2511:40 amBNE - SEA
1 stop19h 58mUnited Airlines
Deal found 10/15$941
This oojo deal was found by Cheapflights users on 10/16. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/99:30 pmSEA - SYD
1 stop41h 20mPhilippine Airlines
Sun 11/1611:35 amSYD - SEA
1 stop26h 05mPhilippine Airlines
Deal found 10/16$944

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 October 17, 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

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Fri 2/20

1:55 pm-5:00 am

1 stop21h 05m

Brisbane

Sun 3/1

5:10 pm-6:51 pm

1 stop19h 41m

$914

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Wed 11/12

7:28 pm-7:30 am

1 stop18h 02m

Brisbane

Wed 11/26

11:40 am-1:38 pm

1 stop19h 58m

$936

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Sat 11/15

11:59 pm-7:30 am

2 stops37h 31m

Brisbane

Tue 11/25

11:40 am-9:13 pm

2 stops27h 33m

$941

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Thu 11/13

12:33 pm-5:00 am

1 stop22h 27m

Brisbane

Thu 11/20

7:40 pm-10:34 pm

1 stop20h 54m

$954

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Thu 11/13

11:40 am-5:00 am

2 stops23h 20m

Brisbane

Thu 11/20

7:40 pm-10:25 pm

1 stop20h 45m

$959

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Mon 3/16

9:30 am-7:20 am

1 stop28h 50m

Brisbane

Wed 3/25

10:05 am-2:45 pm

1 stop21h 40m

$962

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Wed 3/4

9:30 am-8:20 am

1 stop28h 50m

Brisbane

Wed 3/18

10:05 am-5:00 pm

2 stops23h 55m

$966

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Fri 3/6

3:41 pm-10:00 am

1 stop23h 19m

Melbourne

Sun 3/15

12:00 pm-12:37 pm

1 stop18h 37m

$1,014

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Tue 12/30

7:45 pm-10:00 am

1 stop19h 15m

Melbourne

Tue 1/13

1:00 pm-12:41 pm

1 stop18h 41m

$1,014

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Sun 12/28

3:54 pm-10:00 am

1 stop23h 06m

Melbourne

Tue 1/13

1:00 pm-6:44 pm

1 stop24h 44m

$1,014

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/16

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, February is the cheapest month in which you can book a flight from State of Washington to Australia (average of $572). Flying from State of Washington to Australia in January is currently the most expensive (average of $842). 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 October 17, 2025.

It’s typically best to fly out from State of Washington to Australia in the evening. Doing so could potentially save you 22% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from State of Washington to Australia?

Use this chart to determine the cheapest time to fly round-trip from Washington to Australia. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their State of Washington to Australia flight should consider departing on Friday at noon when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 18h 02m. United Airlines provides one of the quickest options available for as low as $936. There are 7346 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 $407 on Philippine Airlines. Other airlines that offer cheap prices include Delta from $529 and United Airlines from $529 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, February is the cheapest month in which you can book a flight from State of Washington to Australia (average of $572). Flying from State of Washington to Australia in January is currently the most expensive (average of $842). 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 October 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$591Average$1,166FlexibilityNo cancel feeOn-time75%
Qantas AirwaysCheapest$647Average$1,250FlexibilityNo cancel feeOn-time74%
Air CanadaCheapest$779Average$1,165FlexibilityNo cancel feeOn-time67%
ANACheapest$794Average$1,048FlexibilityNo cancel feeOn-time80%
American AirlinesCheapest$804Average$976FlexibilityNo cancel feeOn-time71%
Hawaiian AirlinesCheapest$820Average$1,152FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$834Average$1,240FlexibilityNo cancel feeOn-time69%
DeltaCheapest$842Average$1,154FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$1,239Average$1,490FlexibilityNo cancel feeOn-time81%
Qatar AirwaysCheapest$1,315Average$1,549FlexibilityNo cancel feeOn-time68%

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