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$392+ Cheap flights from Seattle (SEA) 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 Seattle to Australia

Keep the following information in mind while searching for Seattle 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 Seattle/Tacoma Intl to Australia
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One-way flight from Seattle/Tacoma Intl to Australia
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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 Seattle to Australia

Cheapest flights from Seattle to Australia
Explore the most affordable flight options available from Seattle 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 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 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 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 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 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 8/2710:00 amSEA - SYD
2 stops30h 25mANA
Tue 9/1611:50 amSYD - SEA
2 stops23h 46mANA
Deal found 6/12$896
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2711:35 pmSEA - MEL
1 stop36h 25mPhilippine Airlines
Wed 9/108:00 amMEL - SEA
1 stop28h 15mPhilippine Airlines
Deal found 6/12$908
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.
Sat 9/62:55 pmSEA - CNS
2 stops27h 10mMultiple Airlines
Thu 9/117:15 pmCNS - SEA
2 stops31h 06mMultiple Airlines
Deal found 6/11$911
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Thu 12/45:40 pmSEA - SYD
1 stop20h 20mAlaska Airlines
Mon 3/211:15 amSYD - SEA
1 stop20h 41mAlaska Airlines
Deal found 6/10$912
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/110:00 amSEA - BNE
1 stop28h 05mMultiple Airlines
Sat 8/98:45 pmBNE - SEA
2 stops29h 36mMultiple Airlines
Deal found 6/12$940

Cheapflights Fare Finder

Customize your flight search to find flights from Seattle 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 Seattle to Australia that are best for you.

Fly from

Seattle

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

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

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

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

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

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 8/3

2:24 pm-6:35 am

1 stop23h 11m

Sydney Kingsford Smith

Sat 8/16

9:25 am-12:34 pm

1 stop20h 09m

$850

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 8/27

10:00 am-9:25 am

2 stops30h 25m

Sydney Kingsford Smith

Tue 9/16

11:50 am-6:36 pm

2 stops23h 46m

$896

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Wed 8/27

11:35 pm-5:00 am

1 stop36h 25m

Melbourne

Wed 9/10

8:00 am-7:15 pm

1 stop28h 15m

$908

SeattleCairns

SEA - CNS

SEACNS

Seattle/Tacoma Intl

Sat 9/6

2:55 pm-11:05 am

2 stops27h 10m

Cairns

Thu 9/11

7:15 pm-9:21 am

2 stops31h 06m

$911

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 Seattle to Australia

Have a flexible travel schedule? Discover the best time to fly to Australia from Seattle 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 Seattle to Australia

What is the cheapest month to book a flight from Seattle to Australia?

Currently, March is the cheapest month in which you can book a flight from Seattle to Australia (average of $1,041). Flying from Seattle 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 SEA to AU?

Find hourly flight availability from Seattle 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.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Australia as you normally would.

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.
Read reviews from past customers who have flown Air Tahiti Nui, EVA Air and Japan Airlines from Seattle to Australia. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very good
64 reviews

Boarding

8.7

Comfort

8.1

Food

7.8

Overall

8.7

Entertainment

7.3

Crew

9.0

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

Boarding

8.7

Comfort

8.1

Food

7.8

Overall

8.7

Entertainment

7.3

Crew

9.0

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

Boarding

8.7

Comfort

8.1

Food

7.8

Overall

8.7

Entertainment

7.3

Crew

9.0

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

Boarding

8.7

Comfort

8.1

Food

7.8

Overall

8.7

Entertainment

7.3

Crew

9.0

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

Boarding

8.7

Comfort

8.1

Food

7.8

Overall

8.7

Entertainment

7.3

Crew

9.0

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

Boarding

8.7

Comfort

8.1

Food

7.8

Overall

8.7

Entertainment

7.3

Crew

9.0

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 Seattle to Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to Australia?

    If you book a flight to Australia from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle.

  • What are the cheapest airlines to fly from Seattle to Australia one-way?

    $401 is the cheapest one-way deal found within the past few days, from Qantas Airways. You may also be able to find cheap deals on Air Canada and American Airlines, with prices starting from $415 and $428, respectively.

  • What are the most popular routes from Seattle to Australia?

    The most popular flight routes from Seattle to Australia are Seattle/Tacoma Intl - Sydney Kingsford Smith, Seattle/Tacoma Intl - Melbourne and Seattle/Tacoma Intl - Brisbane.

  • Can I find deals for flights from Seattle to Australia that include hotel bookings?

    Yes. In addition to deals on Seattle to Australia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Australia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Australia.

  • Can I find deals for business class flights from Seattle to Australia?

    Yes. Cheapflights offers flight deals from Seattle 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 Seattle to Australia?

    Currently, March is the cheapest month in which you can book a flight from Seattle to Australia (average of $1,041). Flying from Seattle 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.

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Alternative routes for Seattle to Australia

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Top 10 airlines flying from Seattle to Australia

Discover the top 10 airlines that operate flights from Seattle 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$1,403FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$833Average$1,187FlexibilityNo cancel feeOn-time67%
Hawaiian AirlinesCheapest$858Average$1,150FlexibilityNo cancel feeOn-time85%
DeltaCheapest$859Average$1,152FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$911Average$1,268FlexibilityNo 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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