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$460+ 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
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 April 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$950
(Trip.com)

One-way from

$460
(Trip.com)

Popular in

December

Cheapest in

March

Average price

$1,109
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. 10% potential increase in price ($130 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 April 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 April 17, 2025.

This Trip.com deal was found by Cheapflights users on 4/17. 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 5/1512:04 pmSEA - SYD
2 stops33h 36mMultiple Airlines
Fri 5/304:20 pmSYD - SEA
1 stop30h 55mMultiple Airlines
Deal found 4/17$950
This oojo deal was found by Cheapflights users on 4/17. 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 10/1211:35 pmSEA - SYD
1 stop39h 25mPhilippine Airlines
Sun 10/2611:15 amSYD - SEA
1 stop26h 20mPhilippine Airlines
Deal found 4/17$968
This Trip.com deal was found by Cheapflights users on 4/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/316:00 amSEA - MEL
2 stops37h 15mMultiple Airlines
Sat 6/71:40 pmMEL - SEA
2 stops26h 02mMultiple Airlines
Deal found 4/16$981
This FlightHub deal was found by Cheapflights users on 4/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1511:35 pmSEA - MEL
1 stop36h 25mPhilippine Airlines
Wed 10/299:00 amMEL - SEA
1 stop28h 35mPhilippine Airlines
Deal found 4/17$1,008
This Air Canada deal was found by Cheapflights users on 4/16. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/141:45 pmSEA - SYD
1 stop24h 35mAir Canada
Thu 10/2310:20 amSYD - SEA
1 stop21h 56mAir Canada
Deal found 4/16$1,052
This Air Canada deal was found by Cheapflights users on 4/17. 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 10/237:40 pmPDX - SYD
1 stop18h 40mAir Canada
Mon 11/1711:20 amSYD - PDX
1 stop26h 04mAir Canada
Deal found 4/17$1,068
This Air Canada deal was found by Cheapflights users on 4/16. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/37:05 pmSEA - MEL
2 stops24h 10mAir Canada
Mon 11/178:10 amMEL - SEA
2 stops25h 20mAir Canada
Deal found 4/16$1,087
This StudentUniverse deal was found by Cheapflights users on 4/17. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/122:50 pmSEA - SYD
2 stops24h 55mAir New Zealand
Sun 8/3111:50 amSYD - SEA
2 stops27h 25mAir New Zealand
Deal found 4/17$1,097
This Air Canada deal was found by Cheapflights users on 4/17. 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 11/57:05 pmPDX - MEL
2 stops24h 10mAir Canada
Wed 11/198:10 amMEL - PDX
2 stops20h 24mAir Canada
Deal found 4/17$1,104
This Gurufare deal was found by Cheapflights users on 4/16. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/2410:00 amSEA - SYD
2 stops40h 15mANA
Mon 6/168:55 pmSYD - SEA
2 stops38h 38mANA
Deal found 4/16$1,106
This BestPriceTravel deal was found by Cheapflights users on 4/17. 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 BestPriceTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/58:15 amSEA - SYD
1 stop18h 30mHawaiian Airlines
Thu 5/159:40 pmSYD - SEA
1 stop25h 35mHawaiian Airlines
Deal found 4/17$1,111
This Air Canada deal was found by Cheapflights users on 4/17. 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 10/1410:00 amPDX - BNE
1 stop28h 05mAir Canada
Tue 11/410:45 amBNE - PDX
1 stop25h 39mAir Canada
Deal found 4/17$1,140

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 April 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

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 5/15

12:04 pm-2:40 pm

2 stops33h 36m

Sydney Kingsford Smith

Fri 5/30

4:20 pm-6:15 am

1 stop30h 55m

$950

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 10/12

11:35 pm-9:00 am

1 stop39h 25m

Sydney Kingsford Smith

Sun 10/26

11:15 am-7:35 pm

1 stop26h 20m

$968

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sat 5/31

6:00 am-12:15 pm

2 stops37h 15m

Melbourne

Sat 6/7

1:40 pm-10:42 pm

2 stops26h 02m

$981

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Wed 5/14

11:35 pm-5:00 am

1 stop36h 25m

Melbourne

Wed 5/21

8:00 am-7:15 pm

1 stop28h 15m

$1,046

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 10/14

1:45 pm-8:20 am

1 stop24h 35m

Sydney Kingsford Smith

Thu 10/23

10:20 am-2:16 pm

1 stop21h 56m

$1,052

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 8/8

10:00 am-7:20 am

1 stop28h 20m

Sydney Kingsford Smith

Thu 8/14

7:30 am-2:45 pm

2 stops24h 15m

$1,084

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 8/12

2:50 pm-8:45 am

2 stops24h 55m

Sydney Kingsford Smith

Sun 8/31

11:50 am-10:15 pm

2 stops27h 25m

$1,097

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 5/24

10:00 am-7:15 pm

2 stops40h 15m

Sydney Kingsford Smith

Mon 6/16

8:55 pm-6:33 pm

2 stops38h 38m

$1,106

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 5/5

8:15 am-7:45 pm

1 stop18h 30m

Sydney Kingsford Smith

Thu 5/15

9:40 pm-6:15 am

1 stop25h 35m

$1,111

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 8/3

2:30 pm-7:05 am

1 stop23h 35m

Sydney Kingsford Smith

Sun 8/17

9:10 am-7:49 pm

1 stop27h 39m

$1,150

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

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 $1,046). Flying from State of Washington to Australia in December is currently the most expensive (average of $1,643). 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 April 17, 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 April 17, 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
8.8
Very good
62 reviews

Entertainment

7.3

Boarding

8.7

Comfort

8.1

Overall

8.8

Crew

9.1

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
8.8
Very good
62 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Entertainment

7.3

Boarding

8.7

Comfort

8.1

Overall

8.8

Crew

9.1

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
1,177 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Entertainment

7.3

Boarding

8.7

Comfort

8.1

Overall

8.8

Crew

9.1

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
1,440 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Entertainment

7.3

Boarding

8.7

Comfort

8.1

Overall

8.8

Crew

9.1

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
844 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Entertainment

7.3

Boarding

8.7

Comfort

8.1

Overall

8.8

Crew

9.1

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
8.2
Very good
729 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Entertainment

7.3

Boarding

8.7

Comfort

8.1

Overall

8.8

Crew

9.1

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 $593 on Philippine Airlines. Other airlines that offer cheap prices include Fiji Airways from $665 and Alaska Airlines from $696 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 $1,046). Flying from State of Washington to Australia in December is currently the most expensive (average of $1,643). 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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$759Average$1,407FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$807Average$1,198FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$834Average$1,198FlexibilityNo cancel feeOn-time67%
DeltaCheapest$854Average$1,196FlexibilityNo cancel feeOn-timeN/A
ANACheapest$861Average$1,196FlexibilityNo cancel feeOn-time80%
Hawaiian AirlinesCheapest$862Average$1,153FlexibilityNo cancel feeOn-time85%
Qantas AirwaysCheapest$866Average$1,495FlexibilityNo cancel feeOn-time74%
Alaska AirlinesCheapest$911Average$1,363FlexibilityNo cancel feeOn-time75%
Singapore AirlinesCheapest$1,199Average$1,553FlexibilityNo cancel feeOn-time81%
Qatar AirwaysCheapest$1,315Average$1,690FlexibilityNo cancel feeOn-time68%

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