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$278+ 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 11/26. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
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 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$808
(Air Canada)

One-way from

$278
(Booking.com)

Popular in

December

Cheapest in

August

Average price

$964
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. 12% potential increase in price ($151 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 30, 2025.

This Air Canada deal was found by Cheapflights users on 10/29. 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 11/113:40 pmSEA - BNE
1 stop23h 05mAir Canada
Tue 12/210:45 amBNE - SEA
1 stop21h 46mAir Canada
Deal found 10/29$808
This Air Canada deal was found by Cheapflights users on 10/28. 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 11/113:40 pmSEA - BNE
1 stop23h 05mAir Canada
Fri 11/1410:45 amBNE - SEA
1 stop16h 46mAir Canada
Deal found 10/28$852
This Orbitz deal was found by Cheapflights users on 10/28. 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.
Fri 12/128:00 pmSEA - BNE
1 stop18h 45mAir Canada
Fri 12/2610:45 amBNE - SEA
1 stop21h 46mAir Canada
Deal found 10/28$867
This Air Canada deal was found by Cheapflights users on 10/29. 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.
Wed 11/267:00 pmPDX - BNE
1 stop19h 45mAir Canada
Wed 12/310:45 amBNE - PDX
1 stop25h 45mAir Canada
Deal found 10/29$871
This Priceline deal was found by Cheapflights users on 10/30. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/128:00 pmSEA - BNE
1 stop18h 45mAir Canada
Wed 1/2810:45 amBNE - SEA
1 stop26h 31mAir Canada
Deal found 10/30$889
This Cheapflightsfares deal was found by Cheapflights users on 10/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/196:05 amSEA - BNE
1 stop28h 55mQantas Airways
Wed 1/147:40 pmBNE - SEA
1 stop19h 12mQantas Airways
Deal found 10/29$899
This Kiwi.com deal was found by Cheapflights users on 10/28. 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
Fri 12/129:40 pmSYD - SEA
1 stop18h 07mMultiple Airlines
Deal found 10/28$904
This Air Canada deal was found by Cheapflights users on 10/29. 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.
Wed 11/2610:05 amSEA - BNE
1 stop28h 40mAir Canada
Wed 12/310:45 amBNE - SEA
1 stop26h 31mAir Canada
Deal found 10/29$911
This Priceline deal was found by Cheapflights users on 10/30. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/128:00 pmSEA - BNE
1 stop18h 45mAir Canada
Tue 2/36:05 amBNE - SEA
2 stops21h 26mAir Canada
Deal found 10/30$912
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 11/2910:05 amSEA - SYD
2 stops39h 10mMultiple Airlines
Sat 12/69:40 pmSYD - SEA
1 stop36h 00mMultiple Airlines
Deal found 10/30$914
This Priceline deal was found by Cheapflights users on 10/29. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/128:00 pmSEA - BNE
1 stop18h 45mAir Canada
Sat 11/1510:45 amBNE - SEA
1 stop16h 46mAir Canada
Deal found 10/29$917
This Air Canada deal was found by Cheapflights users on 10/30. 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.
Sat 11/1510:05 amSEA - BNE
1 stop28h 40mAir Canada
Tue 11/2510:45 amBNE - SEA
1 stop21h 46mAir Canada
Deal found 10/30$922

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 30, 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

Sat 11/15

3:40 pm-8:45 am

1 stop23h 05m

Brisbane

Tue 11/25

10:45 am-9:31 am

1 stop16h 46m

$922

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Mon 11/10

2:40 pm-7:30 am

1 stop22h 50m

Brisbane

Wed 11/26

11:40 am-4:15 pm

1 stop22h 35m

$937

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 11/11

1:20 pm-7:30 am

1 stop24h 10m

Brisbane

Wed 11/26

11:40 am-6:25 pm

1 stop24h 45m

$937

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Wed 11/12

2:40 pm-7:30 am

1 stop22h 50m

Brisbane

Wed 11/26

11:40 am-6:10 pm

2 stops24h 30m

$941

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Wed 11/12

6:05 am-5:00 am

1 stop28h 55m

Brisbane

Wed 11/26

12:55 pm-6:11 pm

2 stops23h 16m

$946

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Wed 11/26

7:10 am-7:30 am

2 stops30h 20m

Brisbane

Wed 12/3

11:40 am-8:24 am

1 stop38h 44m

$949

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Mon 2/9

3:15 pm-8:45 am

1 stop23h 30m

Brisbane

Mon 3/2

12:05 pm-9:15 am

2 stops39h 10m

$966

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Mon 3/9

9:50 am-11:30 am

2 stops32h 40m

Brisbane

Fri 3/27

9:45 am-9:15 am

1 stop16h 30m

$966

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Mon 3/16

7:00 pm-7:45 am

1 stop19h 45m

Brisbane

Fri 3/20

5:05 am-2:40 pm

2 stops26h 35m

$966

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Sat 3/7

7:00 pm-4:55 pm

2 stops27h 55m

Brisbane

Thu 3/26

9:45 am-9:15 am

1 stop16h 30m

$976

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

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, July is the cheapest month in which you can book a flight from State of Washington to Australia (average of $543). Flying from State of Washington to Australia in January is currently the most expensive (average of $843). 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 30, 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 20h 40m. Air Canada provides one of the quickest options available for as low as $1,035. There are 7674 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 $287 on ANA. Other airlines that offer cheap prices include Philippine Airlines from $407 and Air Canada from $472 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, July is the cheapest month in which you can book a flight from State of Washington to Australia (average of $543). Flying from State of Washington to Australia in January is currently the most expensive (average of $843). 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 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
ANACheapest$583Average$615FlexibilityNo cancel feeOn-time80%
Alaska AirlinesCheapest$591Average$1,399FlexibilityNo cancel feeOn-time75%
Qantas AirwaysCheapest$647Average$1,249FlexibilityNo cancel feeOn-time74%
Air CanadaCheapest$780Average$1,114FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$804Average$1,194FlexibilityNo cancel feeOn-time71%
Hawaiian AirlinesCheapest$820Average$1,145FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$832Average$1,240FlexibilityNo cancel feeOn-time69%
DeltaCheapest$842Average$1,160FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$1,239Average$1,483FlexibilityNo cancel feeOn-time81%
Qatar AirwaysCheapest$1,307Average$1,563FlexibilityNo cancel feeOn-time68%

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