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$455+ 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 6/24. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
avr. 5 — avr. 121
sam. 4/5
sam. 4/12
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 mars 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$915
(Air Canada)

One-way from

$455
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$1,035
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. 9% potential increase in price ($121 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 March 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 mars 31, 2025.

This Air Canada deal was found by Cheapflights users on 3/30. 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.
mar. 12/27:05 pmPDX - SYD
1 stop19h 30mAir Canada
mar. 12/1611:20 amSYD - PDX
1 stop26h 04mAir Canada
Deal found 3/30$897
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
jeu. 5/297:55 pmSEA - SYD
1 stop25h 45mMultiple Airlines
jeu. 6/54:20 pmSYD - SEA
1 stop24h 13mMultiple Airlines
Deal found 3/30$939
This Air Canada deal was found by Cheapflights users on 3/30. 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.
jeu. 8/2810:10 amPDX - SYD
1 stop28h 10mMultiple Airlines
sam. 9/68:00 pmSYD - PDX
2 stops30h 31mMultiple Airlines
Deal found 3/30$971
This oojo deal was found by Cheapflights users on 3/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 9/1211:35 pmSEA - BNE
1 stop41h 20mPhilippine Airlines
mer. 10/111:15 amBNE - SEA
1 stop25h 00mPhilippine Airlines
Deal found 3/30$994
This Air Canada deal was found by Cheapflights users on 3/30. 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.
mer. 8/277:15 pmSEA - SYD
1 stop19h 05mAir Canada
sam. 9/139:20 amSYD - SEA
1 stop17h 01mAir Canada
Deal found 3/30$1,050
This Air Canada deal was found by Cheapflights users on 3/30. 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.
dim. 8/37:40 pmPDX - MEL
2 stops22h 45mMultiple Airlines
dim. 8/106:00 amMEL - PDX
2 stops29h 46mMultiple Airlines
Deal found 3/30$1,052
This Air Canada deal was found by Cheapflights users on 3/30. 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.
dim. 11/27:05 pmPDX - BNE
1 stop19h 35mAir Canada
sam. 11/1510:45 amBNE - PDX
1 stop16h 49mAir Canada
Deal found 3/30$1,066
This Air Canada deal was found by Cheapflights users on 3/31. 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.
jeu. 5/227:15 pmSEA - MEL
2 stops23h 10mMultiple Airlines
mar. 6/36:00 amMEL - SEA
2 stops20h 18mMultiple Airlines
Deal found 3/31$1,085
This Air Canada deal was found by Cheapflights users on 3/30. 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.
dim. 5/252:55 pmSEA - MEL
2 stops27h 10mAir Canada
mar. 8/56:00 amMEL - SEA
2 stops20h 21mAir Canada
Deal found 3/30$1,086
This Gurufare deal was found by Cheapflights users on 3/31. 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.
jeu. 8/141:45 pmSEA - SYD
2 stops36h 30mANA
mar. 9/911:50 amSYD - SEA
2 stops23h 46mANA
Deal found 3/31$1,100
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
mer. 5/1410:50 pmSEA - CNS
2 stops43h 35mMultiple Airlines
mer. 5/2111:40 amCNS - SEA
1 stop40h 50mMultiple Airlines
Deal found 3/30$1,129
This Alaska Airlines deal was found by Cheapflights users on 3/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 8/82:50 pmPDX - SYD
1 stop23h 15mAlaska Airlines
ven. 9/269:10 amSYD - PDX
1 stop21h 16mAlaska Airlines
Deal found 3/30$1,149

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 mars 31, 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

PortlandSydney

PDX - SYD

PDXSYD

Portland

mar. 8/5

3:25 pm-10:40 am

2 stops26h 15m

Sydney Kingsford Smith

mar. 9/23

9:20 am-9:31 am

1 stop17h 11m

$915

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

jeu. 5/29

7:55 pm-2:40 pm

1 stop25h 45m

Sydney Kingsford Smith

jeu. 6/5

4:20 pm-11:33 pm

1 stop24h 13m

$939

PortlandSydney

PDX - SYD

PDXSYD

Portland

jeu. 8/28

10:10 am-7:20 am

1 stop28h 10m

Sydney Kingsford Smith

sam. 9/6

8:00 pm-9:31 am

2 stops30h 31m

$971

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

ven. 9/12

11:35 pm-9:55 am

1 stop41h 20m

Brisbane

mer. 10/1

11:15 am-7:15 pm

1 stop25h 00m

$994

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

mer. 8/27

7:15 pm-7:20 am

1 stop19h 05m

Sydney Kingsford Smith

sam. 9/13

9:20 am-9:21 am

1 stop17h 01m

$1,050

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

jeu. 5/22

7:15 pm-11:25 am

2 stops23h 10m

Melbourne

mar. 6/3

6:00 am-9:18 am

2 stops20h 18m

$1,085

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

dim. 5/25

2:55 pm-11:05 am

2 stops27h 10m

Melbourne

mar. 8/5

6:00 am-9:21 am

2 stops20h 21m

$1,086

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

jeu. 8/14

1:45 pm-7:15 pm

2 stops36h 30m

Sydney Kingsford Smith

mar. 9/9

11:50 am-6:36 pm

2 stops23h 46m

$1,100

SeattleCairns

SEA - CNS

SEACNS

Seattle/Tacoma Intl

mer. 5/14

10:50 pm-11:25 am

2 stops43h 35m

Cairns

mer. 5/21

11:40 am-11:30 am

1 stop40h 50m

$1,129

PortlandSydney

PDX - SYD

PDXSYD

Portland

ven. 8/8

2:50 pm-7:05 am

1 stop23h 15m

Sydney Kingsford Smith

ven. 9/26

9:10 am-1:26 pm

1 stop21h 16m

$1,149

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

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 mars 31, 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 mars 31, 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
61 reviews

Comfort

8.0

Boarding

8.7

Crew

9.1

Entertainment

7.2

Food

7.8

Overall

8.7

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
61 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Comfort

8.0

Boarding

8.7

Crew

9.1

Entertainment

7.2

Food

7.8

Overall

8.7

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
1,170 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Comfort

8.0

Boarding

8.7

Crew

9.1

Entertainment

7.2

Food

7.8

Overall

8.7

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
8.7
Very good
61 reviews

Comfort

8.0

Boarding

8.7

Crew

9.1

Entertainment

7.2

Food

7.8

Overall

8.7

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
831 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Comfort

8.0

Boarding

8.7

Crew

9.1

Entertainment

7.2

Food

7.8

Overall

8.7

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
723 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Comfort

8.0

Boarding

8.7

Crew

9.1

Entertainment

7.2

Food

7.8

Overall

8.7

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 $528 on Alaska Airlines. Other airlines that offer cheap prices include Philippine Airlines from $637 and Air Canada from $693 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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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 mars 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$759Average$1,397FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$807Average$1,198FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$832Average$1,201FlexibilityNo cancel feeOn-time67%
Alaska AirlinesCheapest$854Average$1,358FlexibilityNo cancel feeOn-time75%
DeltaCheapest$854Average$1,197FlexibilityNo cancel feeOn-timeN/A
ANACheapest$861Average$1,196FlexibilityNo cancel feeOn-time80%
Qantas AirwaysCheapest$866Average$1,499FlexibilityNo cancel feeOn-time74%
Hawaiian AirlinesCheapest$876Average$1,146FlexibilityNo cancel feeOn-time85%
Singapore AirlinesCheapest$1,199Average$1,630FlexibilityNo cancel feeOn-time81%
Air New ZealandCheapest$1,263Average$1,674FlexibilityNo cancel feeOn-time78%
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