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$433+ 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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
Feb 27 — Mar 61
Thu 2/27
Thu 3/6
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 February 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$848
(Justfly.com)

One-way from

$433
(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 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. 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 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 February 22, 2025.

This Air Canada deal was found by Cheapflights users on 2/21. 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 11/47:05 pmSEA - MEL
2 stops25h 10mAir Canada
Tue 11/187:10 amMEL - SEA
2 stops21h 40mAir Canada
Deal found 2/21$811
This Trip.com deal was found by Cheapflights users on 2/21. 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.
Mon 4/213:06 pmSEA - BNE
2 stops26h 29mMultiple Airlines
Wed 5/711:35 amBNE - SEA
2 stops26h 07mMultiple Airlines
Deal found 2/21$866
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.
Fri 6/137:15 pmSEA - SYD
2 stops22h 35mMultiple Airlines
Sun 6/229:20 amSYD - SEA
1 stop17h 01mMultiple Airlines
Deal found 2/19$894
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/55:45 amSEA - SYD
1 stop32h 35mAir Canada
Fri 7/119:20 amSYD - SEA
1 stop21h 56mAir Canada
Deal found 2/20$898
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.
Sat 11/17:05 pmSEA - CNS
2 stops25h 55mAir Canada
Wed 11/56:00 amCNS - SEA
2 stops26h 30mAir Canada
Deal found 2/20$904
This Air Canada deal was found by Cheapflights users on 2/21. 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 3/110:35 amSEA - BNE
1 stop28h 05mAir Canada
Wed 3/129:40 amBNE - SEA
1 stop17h 10mAir Canada
Deal found 2/21$907
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/17:15 pmSEA - CNS
2 stops23h 50mMultiple Airlines
Sun 6/86:00 amCNS - SEA
2 stops23h 58mMultiple Airlines
Deal found 2/20$909
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
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/133:06 pmSEA - MEL
2 stops27h 49mMultiple Airlines
Sun 4/2711:35 pmMEL - SEA
2 stops38h 00mMultiple Airlines
Deal found 2/20$931
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.
Thu 4/105:10 pmSEA - SYD
1 stop20h 50mUnited Airlines
Sat 4/269:30 amSYD - SEA
1 stop21h 29mUnited Airlines
Deal found 2/20$992
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 2/265:45 amSEA - CBR
2 stops41h 05mAir Canada
Tue 3/46:40 amCBR - SEA
2 stops26h 50mAir Canada
Deal found 2/19$997

Find flights from Seattle to Australia within your budget

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 February 22, 2025.

Fly from

Seattle

Fly to

Australia

Route

Depart

Return

Price

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Tue 8/5

7:15 pm-11:05 am

2 stops22h 50m

Melbourne

Sun 8/17

6:00 am-1:01 pm

2 stops24h 01m

$813

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Mon 4/21

3:06 pm-10:35 am

2 stops26h 29m

Brisbane

Wed 5/7

11:35 am-8:42 pm

2 stops26h 07m

$866

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

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 3/5

3:05 pm-9:45 pm

2 stops35h 40m

Sydney Kingsford Smith

Fri 3/21

7:30 am-9:50 am

2 stops20h 20m

$907

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Wed 8/20

7:15 pm-7:05 am

1 stop18h 50m

Brisbane

Wed 9/3

10:00 am-1:05 pm

1 stop20h 05m

$907

SeattleCairns

SEA - CNS

SEACNS

Seattle/Tacoma Intl

Sun 6/1

7:15 pm-12:05 pm

2 stops23h 50m

Cairns

Sun 6/8

6:00 am-12:58 pm

2 stops23h 58m

$909

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Wed 3/5

11:54 am-6:15 am

1 stop24h 21m

Brisbane

Tue 3/18

8:05 am-3:48 pm

1 stop24h 43m

$915

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sun 4/13

3:06 pm-11:55 am

2 stops27h 49m

Melbourne

Sun 4/27

11:35 pm-8:35 pm

2 stops38h 00m

$931

SeattleCairns

SEA - CNS

SEACNS

Seattle/Tacoma Intl

Sun 6/1

2:55 pm-3:55 pm

3 stops32h 00m

Cairns

Sun 6/8

6:00 am-2:13 pm

2 stops25h 13m

$982

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 4/10

5:10 pm-7:00 am

1 stop20h 50m

Sydney Kingsford Smith

Sat 4/26

9:30 am-1:59 pm

1 stop21h 29m

$992

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 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.

Travel insights for flights from Seattle to Australia

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

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

Currently, February is the cheapest month in which you can book a flight from Seattle to Australia (average of $1,051). Flying from Seattle 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 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 February 22, 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 February 22, 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
61 reviews

Boarding

8.7

Overall

8.7

Entertainment

7.2

Food

7.8

Crew

9.1

Comfort

8.0

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
61 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Boarding

8.7

Overall

8.7

Entertainment

7.2

Food

7.8

Crew

9.1

Comfort

8.0

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
1,199 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Boarding

8.7

Overall

8.7

Entertainment

7.2

Food

7.8

Crew

9.1

Comfort

8.0

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
1,440 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Boarding

8.7

Overall

8.7

Entertainment

7.2

Food

7.8

Crew

9.1

Comfort

8.0

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
8.2
Very good
726 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Boarding

8.7

Overall

8.7

Entertainment

7.2

Food

7.8

Crew

9.1

Comfort

8.0

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.

Emirates
8.1
Very good
3,276 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Boarding

8.7

Overall

8.7

Entertainment

7.2

Food

7.8

Crew

9.1

Comfort

8.0

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?

    $467 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $471 and $492, 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 - Perth.

  • 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, February is the cheapest month in which you can book a flight from Seattle to Australia (average of $1,051). Flying from Seattle 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 Seattle 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 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 February 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$759Average$1,410FlexibilityNo 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$1,133FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$854Average$1,261FlexibilityNo 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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