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$421+ 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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$866
(American Airlines)

One-way from

$421
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$1,048
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 February 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 February 20, 2025.

This Air Canada deal was found by Cheapflights users on 2/18. 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 3/33:05 pmSEA - MEL
2 stops29h 40mAir Canada
Mon 3/108:00 amMEL - SEA
2 stops28h 25mAir Canada
Deal found 2/18$808
This Air Canada deal was found by Cheapflights users on 2/20. 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 6/207:40 pmPDX - MEL
2 stops22h 25mAir Canada
Mon 6/306:00 amMEL - PDX
2 stops20h 35mAir Canada
Deal found 2/20$873
This United Airlines deal was found by Cheapflights users on 2/20. 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.
Tue 3/257:34 pmSEA - BNE
1 stop17h 56mUnited Airlines
Wed 4/210:30 amBNE - SEA
1 stop22h 28mUnited Airlines
Deal found 2/20$874
This Air Canada deal was found by Cheapflights users on 2/19. 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 8/207:15 pmSEA - SYD
2 stops22h 25mAir Canada
Mon 9/17:00 amSYD - SEA
2 stops19h 21mAir Canada
Deal found 2/19$878
This United Airlines deal was found by Cheapflights users on 2/19. 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.
Wed 3/198:55 amPDX - BNE
2 stops28h 35mUnited Airlines
Wed 3/2610:40 amBNE - PDX
2 stops29h 15mUnited Airlines
Deal found 2/19$879
This Justfly.com deal was found by Cheapflights users on 2/19. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/97:40 pmPDX - MEL
2 stops23h 20mMultiple Airlines
Sat 8/166:00 pmMEL - PDX
2 stops45h 56mMultiple Airlines
Deal found 2/19$881
This Air Canada deal was found by Cheapflights users on 2/19. 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 3/107:05 pmSEA - SYD
1 stop19h 30mMultiple Airlines
Sun 3/166:20 amSYD - SEA
2 stops26h 10mMultiple Airlines
Deal found 2/19$886
This United Airlines deal was found by Cheapflights users on 2/19. 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 12/811:55 amSEA - SYD
1 stop26h 20mUnited Airlines
Mon 12/2212:10 pmSYD - SEA
1 stop25h 42mUnited Airlines
Deal found 2/19$897
This Air Canada deal was found by Cheapflights users on 2/19. 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 11/17:05 pmSEA - CNS
2 stops25h 55mAir Canada
Wed 11/56:00 amCNS - SEA
2 stops26h 30mAir Canada
Deal found 2/19$904
This Justfly.com deal was found by Cheapflights users on 2/19. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/113:05 pmSEA - BNE
2 stops47h 25mAir Canada
Tue 3/189:40 amBNE - SEA
1 stop25h 45mAir Canada
Deal found 2/19$911
This American Airlines deal was found by Cheapflights users on 2/20. 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 3/195:00 amPDX - BNE
1 stop31h 30mAmerican Airlines
Wed 3/268:05 amBNE - PDX
1 stop22h 17mAmerican Airlines
Deal found 2/20$915
This American Airlines deal was found by Cheapflights users on 2/20. 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 3/110:24 amSEA - BNE
1 stop25h 51mAmerican Airlines
Fri 3/148:05 amBNE - SEA
1 stop30h 05mAmerican Airlines
Deal found 2/20$915

Find flights from Washington to Australia within your budget

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 20, 2025.

Fly from

Washington

Fly to

Australia

Route

Depart

Return

Price

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Mon 3/3

3:05 pm-3:45 pm

2 stops29h 40m

Melbourne

Mon 3/10

8:00 am-6:25 pm

2 stops28h 25m

$808

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 3/25

7:34 pm-6:30 am

1 stop17h 56m

Brisbane

Wed 4/2

10:30 am-3:58 pm

1 stop22h 28m

$874

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Wed 3/19

8:55 am-6:30 am

2 stops28h 35m

Brisbane

Wed 3/26

10:40 am-10:55 pm

2 stops29h 15m

$879

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 3/5

10:35 am-6:05 pm

2 stops36h 30m

Sydney Kingsford Smith

Fri 3/21

7:30 am-9:50 am

2 stops20h 20m

$885

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 3/10

7:05 pm-8:35 am

1 stop19h 30m

Sydney Kingsford Smith

Sun 3/16

6:20 am-2:30 pm

2 stops26h 10m

$886

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 3/11

3:05 pm-7:30 am

2 stops47h 25m

Brisbane

Tue 3/18

9:40 am-6:25 pm

1 stop25h 45m

$911

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Wed 3/19

5:00 am-5:30 am

1 stop31h 30m

Brisbane

Wed 3/26

8:05 am-1:22 pm

1 stop22h 17m

$915

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Sat 3/1

10:24 am-6:15 am

1 stop25h 51m

Brisbane

Fri 3/14

8:05 am-9:10 pm

1 stop30h 05m

$915

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Wed 3/19

5:40 am-6:45 am

2 stops32h 05m

Brisbane

Wed 3/26

10:30 am-3:59 pm

1 stop22h 29m

$920

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 3/10

7:00 am-7:00 am

2 stops30h 00m

Sydney Kingsford Smith

Sun 3/16

12:10 pm-12:50 am

1 stop30h 40m

$920

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

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.

Travel insights for flights from Washington to Australia

Get recent, data-driven insights about flights from Washington to Australia including ideal travel times, pricing trends, and more.

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 $1,051). 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 February 20, 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 February 20, 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 Korean Air. 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

Food

7.8

Entertainment

7.2

Overall

8.7

Crew

9.1

Boarding

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

Food

7.8

Entertainment

7.2

Overall

8.7

Crew

9.1

Boarding

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
1,200 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Comfort

8.0

Food

7.8

Entertainment

7.2

Overall

8.7

Crew

9.1

Boarding

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.

Korean Air
8.4
Very good
1,037 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Comfort

8.0

Food

7.8

Entertainment

7.2

Overall

8.7

Crew

9.1

Boarding

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
8.4
Very good
842 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Comfort

8.0

Food

7.8

Entertainment

7.2

Overall

8.7

Crew

9.1

Boarding

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

Food

7.8

Entertainment

7.2

Overall

8.7

Crew

9.1

Boarding

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 $425 on United Airlines. Other airlines that offer cheap prices include American Airlines from $428 and Air Canada from $528 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 $1,051). 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$759Average$1,367FlexibilityNo cancel feeOn-time69%
ANACheapest$767Average$1,196FlexibilityNo cancel feeOn-time80%
Air CanadaCheapest$825Average$1,220FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$843Average$1,212FlexibilityNo cancel feeOn-time71%
DeltaCheapest$848Average$1,197FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$854Average$1,357FlexibilityNo cancel feeOn-time75%
Qantas AirwaysCheapest$866Average$1,554FlexibilityNo cancel feeOn-time74%
Hawaiian AirlinesCheapest$883Average$1,143FlexibilityNo cancel feeOn-time85%
Air New ZealandCheapest$1,207Average$1,548FlexibilityNo cancel feeOn-time78%
Singapore AirlinesCheapest$1,210Average$1,555FlexibilityNo cancel feeOn-time81%
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