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$445+ 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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
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 November 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$850
(Air Canada)

One-way from

$445
(Delta)

Popular in

December

Cheapest in

August

Average price

$982
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 ($153 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 6, 2025.

This Air Canada deal was found by Cheapflights users on 11/4. 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 11/115:50 amSEA - BNE
1 stop32h 55mAir Canada
Tue 12/210:45 amBNE - SEA
1 stop21h 46mAir Canada
Deal found 11/4$808
This Air Canada deal was found by Cheapflights users on 11/4. 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.
Fri 11/288:00 pmSEA - BNE
1 stop18h 45mAir Canada
Wed 12/310:45 amBNE - SEA
1 stop16h 46mAir Canada
Deal found 11/4$837
This Air Canada deal was found by Cheapflights users on 11/4. 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 11/153:40 pmSEA - BNE
1 stop23h 05mMultiple Airlines
Tue 11/256:10 amBNE - SEA
2 stops21h 21mMultiple Airlines
Deal found 11/4$856
This Delta deal was found by Cheapflights users on 11/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1212:40 pmSEA - BNE
1 stop25h 40mDelta
Wed 11/2611:05 amBNE - SEA
1 stop27h 51mDelta
Deal found 11/6$866
This Delta deal was found by Cheapflights users on 11/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1012:40 pmSEA - BNE
1 stop25h 40mDelta
Fri 11/2110:40 amBNE - SEA
1 stop28h 16mDelta
Deal found 11/6$867
This Delta deal was found by Cheapflights users on 11/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/21:34 pmSEA - BNE
2 stops48h 46mDelta
Fri 12/1210:40 amBNE - SEA
1 stop18h 05mDelta
Deal found 11/5$882
This Travelocity deal was found by Cheapflights users on 11/5. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/275:50 amSEA - BNE
1 stop32h 55mMultiple Airlines
Wed 12/107:40 pmBNE - SEA
2 stops36h 51mMultiple Airlines
Deal found 11/5$886
This Air Canada deal was found by Cheapflights users on 11/4. 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 11/128:00 pmSEA - BNE
1 stop18h 45mMultiple Airlines
Wed 11/266:10 amBNE - SEA
2 stops21h 21mMultiple Airlines
Deal found 11/4$911
This American Airlines deal was found by Cheapflights users on 11/4. 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 11/4$915
This American Airlines deal was found by Cheapflights users on 11/6. 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.
Thu 11/206:00 amPDX - MEL
1 stop32h 30mAmerican Airlines
Tue 12/212:00 pmMEL - PDX
1 stop24h 12mAmerican Airlines
Deal found 11/6$940
This American Airlines deal was found by Cheapflights users on 11/6. 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.
Fri 11/215:42 pmPDX - MEL
1 stop20h 48mAmerican Airlines
Fri 12/54:05 pmMEL - PDX
1 stop22h 05mAmerican Airlines
Deal found 11/6$942
This Trip.com deal was found by Cheapflights users on 11/4. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/273:22 pmSEA - SYD
2 stops26h 13mMultiple Airlines
Mon 12/12:00 pmSYD - SEA
2 stops25h 58mMultiple Airlines
Deal found 11/4$1,008

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 November 6, 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

Wed 11/12

12:40 pm-8:20 am

1 stop25h 40m

Brisbane

Wed 11/26

11:05 am-8:56 pm

1 stop27h 51m

$866

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Mon 11/10

2:11 pm-8:20 am

1 stop24h 09m

Brisbane

Fri 11/28

10:40 am-8:56 pm

1 stop28h 16m

$867

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Mon 11/10

9:30 am-8:20 am

2 stops28h 50m

Brisbane

Sun 11/30

10:40 am-2:44 pm

1 stop22h 04m

$872

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Mon 11/10

12:40 pm-8:20 am

1 stop25h 40m

Brisbane

Fri 11/21

10:40 am-4:55 pm

2 stops24h 15m

$872

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Thu 12/11

5:50 am-8:45 am

1 stop32h 55m

Brisbane

Wed 12/24

10:45 am-10:46 pm

1 stop30h 01m

$933

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Thu 11/20

6:00 am-9:30 am

1 stop32h 30m

Melbourne

Tue 12/2

12:00 pm-5:12 pm

1 stop24h 12m

$940

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Sat 11/15

3:40 pm-8:45 am

1 stop23h 05m

Brisbane

Tue 11/25

6:10 am-9:31 am

2 stops21h 21m

$940

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Wed 11/12

11:25 am-5:00 am

2 stops23h 35m

Brisbane

Wed 11/26

12:55 pm-6:11 pm

2 stops23h 16m

$950

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Tue 1/20

3:15 pm-8:45 am

1 stop23h 30m

Brisbane

Sat 1/31

10:45 am-9:15 am

1 stop16h 30m

$965

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

$967

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/6

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 $546). 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 November 6, 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 23h 30m. Delta provides one of the quickest options available for as low as $965. There are 7282 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 $445 on Delta. Other airlines that offer cheap prices include Air Canada from $480 and American Airlines from $515 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 $546). 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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
ANACheapest$583Average$615FlexibilityNo cancel feeOn-time80%
Alaska AirlinesCheapest$591Average$1,399FlexibilityNo cancel feeOn-time75%
Qantas AirwaysCheapest$647Average$1,274FlexibilityNo cancel feeOn-time74%
Air CanadaCheapest$779Average$1,116FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$804Average$1,194FlexibilityNo cancel feeOn-time71%
Hawaiian AirlinesCheapest$820Average$1,143FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$832Average$1,245FlexibilityNo cancel feeOn-time69%
DeltaCheapest$842Average$1,162FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$1,239Average$1,483FlexibilityNo cancel feeOn-time81%
Qatar AirwaysCheapest$1,307Average$1,499FlexibilityNo cancel feeOn-time68%

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