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$392+ 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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$777
(Air Canada)

One-way from

$392
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$1,089
From Washington to Australia
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One-way flight from Washington to Australia
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($139 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Air Canada deal was found by Cheapflights users on 6/11. 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.
Sun 9/72:55 pmSEA - SYD
1 stop23h 25mAir Canada
Tue 9/169:20 amSYD - SEA
1 stop20h 46mAir Canada
Deal found 6/11$777
This Air Canada deal was found by Cheapflights users on 6/11. 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.
Wed 8/207:40 pmPDX - SYD
1 stop18h 40mAir Canada
Wed 10/19:20 amSYD - PDX
1 stop17h 01mAir Canada
Deal found 6/11$777
This Cheapflightsfares deal was found by Cheapflights users on 6/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/272:32 pmSEA - SYD
1 stop23h 58mQantas Airways
Tue 9/169:10 amSYD - SEA
1 stop20h 40mQantas Airways
Deal found 6/12$793
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/92:56 pmPDX - SYD
1 stop23h 09mQantas Airways
Sat 8/235:45 pmSYD - PDX
1 stop20h 30mQantas Airways
Deal found 6/11$793
This Air Canada deal was found by Cheapflights users on 6/11. 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.
Tue 9/162:55 pmSEA - MEL
2 stops27h 10mAir Canada
Thu 10/26:00 amMEL - SEA
2 stops25h 16mAir Canada
Deal found 6/11$813
This Flighttix deal was found by Cheapflights users on 6/12. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/46:09 pmSEA - SYD
1 stop20h 21mMultiple Airlines
Sun 8/179:10 amSYD - SEA
1 stop18h 39mMultiple Airlines
Deal found 6/12$821
This Air Canada deal was found by Cheapflights users on 6/11. 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.
Sun 9/147:40 pmPDX - MEL
2 stops22h 55mMultiple Airlines
Sun 9/286:00 amMEL - PDX
2 stops20h 21mMultiple Airlines
Deal found 6/11$833
This American Airlines deal was found by Cheapflights users on 6/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/22:30 pmSEA - SYD
1 stop24h 00mAmerican Airlines
Sun 8/245:45 pmSYD - SEA
1 stop20h 48mAmerican Airlines
Deal found 6/12$835
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/282:56 pmPDX - SYD
1 stop23h 34mAmerican Airlines
Thu 9/115:45 pmSYD - PDX
2 stops22h 26mAmerican Airlines
Deal found 6/11$840
This Delta deal was found by Cheapflights users on 6/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/19:25 pmSEA - SYD
1 stop40h 10mDelta
Thu 8/149:25 amSYD - SEA
1 stop20h 09mDelta
Deal found 6/12$843
This United Airlines deal was found by Cheapflights users on 6/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/45:10 amSEA - SYD
1 stop32h 45mUnited Airlines
Sun 8/179:30 amSYD - SEA
2 stops23h 24mUnited Airlines
Deal found 6/12$845
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/912:35 pmPDX - SYD
1 stop25h 00mDelta
Sat 8/309:25 amSYD - PDX
1 stop23h 34mDelta
Deal found 6/11$850

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 June 12, 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

Sun 9/7

2:55 pm-7:20 am

1 stop23h 25m

Sydney Kingsford Smith

Tue 9/16

9:20 am-1:06 pm

1 stop20h 46m

$777

PortlandSydney

PDX - SYD

PDXSYD

Portland

Wed 8/20

7:40 pm-7:20 am

1 stop18h 40m

Sydney Kingsford Smith

Wed 10/1

9:20 am-9:21 am

1 stop17h 01m

$777

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 8/27

2:32 pm-7:30 am

1 stop23h 58m

Sydney Kingsford Smith

Tue 9/16

9:10 am-12:50 pm

1 stop20h 40m

$793

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sat 8/9

2:56 pm-7:05 am

1 stop23h 09m

Sydney Kingsford Smith

Sat 8/23

5:45 pm-9:15 pm

1 stop20h 30m

$793

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Tue 9/16

2:55 pm-11:05 am

2 stops27h 10m

Melbourne

Thu 10/2

6:00 am-2:16 pm

2 stops25h 16m

$813

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 8/4

6:09 pm-7:30 am

1 stop20h 21m

Sydney Kingsford Smith

Sun 8/17

9:10 am-10:49 am

1 stop18h 39m

$821

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Sun 9/14

7:40 pm-11:35 am

2 stops22h 55m

Melbourne

Sun 9/28

6:00 am-9:21 am

2 stops20h 21m

$833

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 8/2

2:30 pm-7:30 am

1 stop24h 00m

Sydney Kingsford Smith

Sun 8/24

5:45 pm-9:33 pm

1 stop20h 48m

$835

PortlandSydney

PDX - SYD

PDXSYD

Portland

Thu 8/28

2:56 pm-7:30 am

1 stop23h 34m

Sydney Kingsford Smith

Thu 9/11

5:45 pm-11:11 pm

2 stops22h 26m

$840

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Fri 8/1

5:10 am-6:55 am

1 stop32h 45m

Sydney Kingsford Smith

Mon 8/11

9:30 am-8:57 pm

2 stops28h 27m

$843

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

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, March is the cheapest month in which you can book a flight from State of Washington to Australia (average of $1,041). Flying from State of Washington to Australia in December is currently the most expensive (average of $1,635). 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 June 12, 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.

Rainfall in Australia by month

Plan your trip to Australia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Australia ranges from 2.0 - 5.1 inches per month. March is typically the wettest month, when rainfall can reach 5.1 in. September is typically the driest time to visit Australia when rainfall is around 2.0 in.

Temperature in Australia by month

Plan your trip to Australia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Australia, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing Australia

Get insights into the airlines that provide service to Australia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Australia. Reviews last updated June 12, 2025.
To help decide which airline to fly from Washington to Australia, see what other customers have to say about Air Tahiti Nui, EVA Air and Japan Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very good
64 reviews

Entertainment

7.3

Crew

9.0

Overall

8.7

Comfort

8.1

Boarding

8.7

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air Tahiti Nui
8.7
Very good
64 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Entertainment

7.3

Crew

9.0

Overall

8.7

Comfort

8.1

Boarding

8.7

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
EVA Air
8.4
Very good
1,202 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Entertainment

7.3

Crew

9.0

Overall

8.7

Comfort

8.1

Boarding

8.7

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Japan Airlines
8.3
Very good
1,489 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Entertainment

7.3

Crew

9.0

Overall

8.7

Comfort

8.1

Boarding

8.7

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
China Airlines
8.3
Very good
738 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Entertainment

7.3

Crew

9.0

Overall

8.7

Comfort

8.1

Boarding

8.7

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
ANA
8.3
Very good
882 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Entertainment

7.3

Crew

9.0

Overall

8.7

Comfort

8.1

Boarding

8.7

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

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.

  • 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 $395 on Air Canada. Other airlines that offer cheap prices include Qantas Airways from $401 and American Airlines from $428 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 $1,041). Flying from State of Washington to Australia in December is currently the most expensive (average of $1,635). 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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Alternative routes for Washington to Australia

See prices for flight routes from nearby airports that may be better suited for you.
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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$647Average$1,294FlexibilityNo cancel feeOn-time74%
ANACheapest$791Average$1,139FlexibilityNo cancel feeOn-time80%
American AirlinesCheapest$807Average$1,199FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$831Average$1,344FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$833Average$1,187FlexibilityNo cancel feeOn-time67%
Hawaiian AirlinesCheapest$858Average$1,150FlexibilityNo cancel feeOn-time85%
DeltaCheapest$859Average$1,200FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$911Average$1,360FlexibilityNo cancel feeOn-time75%
Singapore AirlinesCheapest$1,251Average$1,544FlexibilityNo cancel feeOn-time81%
Qatar AirwaysCheapest$1,315Average$1,712FlexibilityNo cancel feeOn-time68%

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