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$383+ 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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
Mar 17 — Mar 241
Tue 3/17
Tue 3/24
1 adult, Economy
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Cheap 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 February 15, 2026.

This oojo deal was found by Cheapflights users on 2/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1711:10 pm
SEA
-
SYD
1 stop39h 50m
Philippine Airlines
Tue 9/2210:15 am
SYD
-
SEA
1 stop26h 50m
Philippine Airlines
Deal found 2/15$793
This Air Canada deal was found by Cheapflights users on 2/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/103:40 pm
SEA
-
BNE
1 stop23h 05m
Air Canada
Sun 5/1010:00 am
BNE
-
SEA
1 stop25h 30m
Air Canada
Deal found 2/15$800
This Air Canada deal was found by Cheapflights users on 2/11. 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.
Thu 3/59:50 am
PDX
-
BNE
1 stop28h 55m
Air Canada
Thu 3/199:45 am
BNE
-
PDX
1 stop16h 30m
Air Canada
Deal found 2/11$803
This Air Canada deal was found by Cheapflights users on 2/12. 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 3/318:00 pm
SEA
-
BNE
1 stop18h 05m
Air Canada
Tue 4/710:00 am
BNE
-
SEA
1 stop16h 35m
Air Canada
Deal found 2/12$803
This Air Canada deal was found by Cheapflights users on 2/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/188:00 pm
SEA
-
BNE
1 stop18h 45m
Air Canada
Fri 4/1710:00 am
BNE
-
SEA
1 stop22h 05m
Air Canada
Deal found 2/15$804
This Air Canada deal was found by Cheapflights users on 2/14. 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 3/108:00 pm
SEA
-
BNE
1 stop18h 45m
Multiple Airlines
Sun 5/108:40 pm
BNE
-
SEA
2 stops29h 35m
Multiple Airlines
Deal found 2/14$819
This Air Canada deal was found by Cheapflights users on 2/11. 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.
Thu 3/57:05 pm
PDX
-
BNE
2 stops24h 20m
Multiple Airlines
Thu 3/199:45 am
BNE
-
PDX
1 stop21h 55m
Multiple Airlines
Deal found 2/11$821
This Air Canada deal was found by Cheapflights users on 2/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/198:00 pm
SEA
-
BNE
2 stops24h 25m
Multiple Airlines
Fri 4/1710:00 am
BNE
-
SEA
1 stop16h 35m
Multiple Airlines
Deal found 2/15$822
This Air Canada deal was found by Cheapflights users on 2/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/243:40 pm
SEA
-
BNE
1 stop23h 05m
Multiple Airlines
Thu 5/78:40 pm
BNE
-
SEA
2 stops29h 35m
Multiple Airlines
Deal found 2/13$823
This Air Canada deal was found by Cheapflights users on 2/12. 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.
Mon 2/233:20 pm
PDX
-
BNE
2 stops28h 10m
Air Canada
Tue 4/710:00 am
BNE
-
PDX
1 stop16h 10m
Air Canada
Deal found 2/12$827
This Air Canada deal was found by Cheapflights users on 2/12. 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.
Thu 2/193:40 pm
SEA
-
BNE
1 stop23h 05m
Air Canada
Wed 3/410:45 am
BNE
-
SEA
1 stop22h 16m
Air Canada
Deal found 2/12$832
This CheapTickets.ch deal was found by Cheapflights users on 2/15. 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 CheapTickets.ch is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/174:50 pm
SEA
-
SYD
2 stops25h 45m
Multiple Airlines
Tue 3/242:00 pm
SYD
-
SEA
2 stops22h 51m
Multiple Airlines
Deal found 2/15$846

Find flight deals from Washington to Australia

Keep the following information in mind while searching for Washington to Australia flight deals. Data was last updated February 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$800
(Air Canada)

One-way from

$371
(Trip.com)

Popular in

December

Cheapest in

August

Average price

$847
Provider with most accurate pricing for Seattle/Tacoma Intl-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Sydney Kingsford Smith flights.
Search Deals
From Washington to Australia
Search Deals
One-way flight from Washington to Australia
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($205 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($50 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 15, 2026.
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

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Thu 3/5

9:50 am-8:45 am

1 stop28h 55m

Brisbane

Thu 3/19

9:45 am-9:15 am

1 stop16h 30m

$803

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Thu 3/5

7:05 pm-1:25 pm

2 stops24h 20m

Brisbane

Thu 3/19

9:45 am-2:40 pm

1 stop21h 55m

$821

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 3/10

10:10 am-7:45 am

1 stop28h 35m

Brisbane

Sun 5/10

8:40 pm-9:15 am

2 stops29h 35m

$857

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Wed 3/4

3:40 pm-4:55 pm

2 stops31h 15m

Brisbane

Wed 3/18

9:45 am-9:35 am

1 stop16h 50m

$867

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Sun 3/15

3:40 pm-4:55 pm

2 stops32h 15m

Brisbane

Sun 3/22

9:45 am-7:16 pm

1 stop26h 31m

$888

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Wed 5/13

7:45 pm-7:05 am

1 stop18h 20m

Brisbane

Wed 5/27

10:00 am-7:05 pm

1 stop26h 05m

$897

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Mon 6/15

3:25 pm-7:05 am

1 stop22h 40m

Brisbane

Tue 7/7

10:00 am-9:31 am

1 stop16h 31m

$897

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Sun 5/3

3:25 pm-7:05 am

1 stop22h 40m

Brisbane

Sun 5/17

10:00 am-7:05 pm

1 stop26h 05m

$897

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Thu 5/14

7:45 pm-4:55 pm

2 stops28h 10m

Brisbane

Fri 7/17

10:00 am-9:31 am

1 stop16h 31m

$915

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Wed 5/13

7:45 pm-7:05 am

1 stop18h 20m

Brisbane

Wed 5/27

8:40 pm-9:30 am

2 stops29h 50m

$916

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/12

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, January is the cheapest month in which you can book a flight from State of Washington to Australia (average of $426). Flying from State of Washington to Australia in December is currently the most expensive (average of $845). 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.

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 21h 55m. Air Canada provides one of the quickest options available for as low as $1,090. 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 $253 on ANA. Other airlines that offer cheap prices include Air Canada from $366 and Qantas Airways from $380 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, January is the cheapest month in which you can book a flight from State of Washington to Australia (average of $426). Flying from State of Washington to Australia in December is currently the most expensive (average of $845). 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 February 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$97Average$1,409FlexibilityNo cancel feeOn-time75%
ANACheapest$583Average$615FlexibilityNo cancel feeOn-time80%
Qantas AirwaysCheapest$621Average$1,268FlexibilityNo cancel feeOn-time74%
Air CanadaCheapest$779Average$1,091FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$804Average$976FlexibilityNo cancel feeOn-time71%
Hawaiian AirlinesCheapest$812Average$1,159FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$821Average$1,271FlexibilityNo cancel feeOn-time69%
DeltaCheapest$842Average$1,253FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$1,251Average$1,480FlexibilityNo cancel feeOn-time81%
Qatar AirwaysCheapest$1,325Average$1,487FlexibilityNo cancel feeOn-time68%

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