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Cheap flights from Seattle to Australia from $711

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 15/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
23 Apr — 30 Apr1
1 adult

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 18 April 2025.

Round-trip from

$1,491

One-way from

$711

Popular in

December

Cheapest in

March

Average price

$1,741
15/5-30/5
  • 15/5-30/5
  • 3 total stops
  • 64h 31m total
  • Seattle to Australia
Search Deals
15/7
  • 15/7
  • 2 total stops
  • 35h 20m total
  • Seattle to Australia
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($323 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($81 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

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 18 April 2025.

Thu 15/519:55SEA - SYD
1 stop25h 45mMultiple Airlines
Fri 23/516:20SYD - SEA
1 stop33h 15mMultiple Airlines
Deal found 18/4$1,476
Sun 19/1023:35SEA - SYD
1 stop39h 25mPhilippine Airlines
Sun 26/1011:15SYD - SEA
1 stop26h 20mPhilippine Airlines
Deal found 18/4$1,520
Wed 15/1023:35SEA - MEL
1 stop36h 25mPhilippine Airlines
Wed 29/1009:00MEL - SEA
1 stop28h 35mPhilippine Airlines
Deal found 17/4$1,583
Sat 3/509:12SEA - MEL
2 stops34h 03mMultiple Airlines
Thu 15/512:55MEL - SEA
2 stops26h 05mMultiple Airlines
Deal found 17/4$1,608
Tue 14/1014:55SEA - SYD
1 stop23h 25mAir Canada
Thu 13/1111:20SYD - SEA
1 stop17h 30mAir Canada
Deal found 17/4$1,652
Mon 3/1119:05SEA - MEL
2 stops24h 10mAir Canada
Mon 17/1108:10MEL - SEA
2 stops20h 40mAir Canada
Deal found 17/4$1,708
Wed 6/814:50SEA - SYD
2 stops24h 55mAir New Zealand
Sun 17/809:55SYD - SEA
2 stops29h 11mAir New Zealand
Deal found 18/4$1,722
Sat 24/510:00SEA - SYD
2 stops40h 15mANA
Mon 16/620:55SYD - SEA
2 stops38h 38mANA
Deal found 16/4$1,736
Mon 5/508:15SEA - SYD
1 stop18h 30mHawaiian Airlines
Thu 15/521:40SYD - SEA
1 stop25h 35mHawaiian Airlines
Deal found 17/4$1,744
Sat 1/1118:06SEA - SYD
1 stop20h 54mQantas Airways
Fri 21/1117:25SYD - SEA
1 stop20h 19mQantas Airways
Deal found 17/4$1,805
Wed 14/523:35SEA - BNE
1 stop41h 20mPhilippine Airlines
Fri 23/511:15BNE - SEA
1 stop25h 00mPhilippine Airlines
Deal found 18/4$1,809
Mon 26/508:25SEA - SYD
1 stop18h 20mAlaska Airlines
Thu 19/621:40SYD - SEA
1 stop25h 20mAlaska Airlines
Deal found 16/4$1,816

Cheapflights Fare Finder

Customise 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 647,157 searches. Data last updated 18 April 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

Thu 15/5

19:55-14:40

1 stop25h 45m

Sydney Kingsford Smith

Fri 23/5

16:20-08:35

1 stop33h 15m

$1,476

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 12/10

23:35-09:00

1 stop39h 25m

Sydney Kingsford Smith

Sun 26/10

11:15-19:35

1 stop26h 20m

$1,520

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Wed 15/10

23:35-06:00

1 stop36h 25m

Melbourne

Wed 29/10

09:00-19:35

1 stop28h 35m

$1,583

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sat 3/5

09:12-12:15

2 stops34h 03m

Melbourne

Thu 15/5

12:55-22:00

2 stops26h 05m

$1,608

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 14/10

14:55-08:20

1 stop23h 25m

Sydney Kingsford Smith

Thu 13/11

11:20-09:50

1 stop17h 30m

$1,652

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 6/8

14:50-08:45

2 stops24h 55m

Sydney Kingsford Smith

Sun 17/8

09:55-22:06

2 stops29h 11m

$1,722

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Tue 14/10

19:15-12:35

2 stops23h 20m

Melbourne

Mon 27/10

06:00-09:50

2 stops21h 50m

$1,724

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 24/5

10:00-19:15

2 stops40h 15m

Sydney Kingsford Smith

Mon 16/6

20:55-18:33

2 stops38h 38m

$1,736

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 5/5

08:15-19:45

1 stop18h 30m

Sydney Kingsford Smith

Thu 15/5

21:40-06:15

1 stop25h 35m

$1,744

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 3/8

14:30-07:05

1 stop23h 35m

Sydney Kingsford Smith

Sun 17/8

09:10-19:49

1 stop27h 39m

$1,805

Flights are sorted by cheapest return flights first.

Deals found on 17/4

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 return 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, May is the cheapest month in which you can book a flight from Seattle to Australia (average of $129). Flying from Seattle to Australia in October is currently the most expensive (average of $171). 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 18 April 2025.

When flying from Seattle 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 50.0 - 130.0 inches per month. March is typically the wettest month, when rainfall can reach 130.0 mm. September is typically the driest time to visit Australia when rainfall is around 50.0 mm.

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 22.0 C. Travellers hoping to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 11.0 C).

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 18 April 2025.
Read through reviews of airlines operating flights from Seattle to Australia, such as Air Tahiti Nui, EVA Air and Japan Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Crew

9.1

Boarding

8.7

Overall

8.8

Entertainment

7.3

Food

7.8

Comfort

8.1

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
Check prices

Crew

9.1

Boarding

8.7

Overall

8.8

Entertainment

7.3

Food

7.8

Comfort

8.1

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
1,179 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Crew

9.1

Boarding

8.7

Overall

8.8

Entertainment

7.3

Food

7.8

Comfort

8.1

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
1,447 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Crew

9.1

Boarding

8.7

Overall

8.8

Entertainment

7.3

Food

7.8

Comfort

8.1

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
845 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Crew

9.1

Boarding

8.7

Overall

8.8

Entertainment

7.3

Food

7.8

Comfort

8.1

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
Check prices

Crew

9.1

Boarding

8.7

Overall

8.8

Entertainment

7.3

Food

7.8

Comfort

8.1

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?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Australia. Seattle/Tacoma Intl is conveniently located just 18.4 km from Seattle’s city centre.

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

    To fly one-way, consider booking your trip with Philippine Airlines, which is currently one of the cheapest options available, starting at $912. Fiji Airways flights start at $1,044 while deals on Air Canada start at $1,091 one-way.

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

    Most travellers choose Seattle/Tacoma Intl - Sydney Kingsford Smith, Seattle/Tacoma Intl - Melbourne or Seattle/Tacoma Intl - Melbourne Avalon when deciding on the best route from Seattle to Australia.

  • 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 holiday 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, May is the cheapest month in which you can book a flight from Seattle to Australia (average of $129). Flying from Seattle to Australia in October is currently the most expensive (average of $171). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 2 airlines flying from Seattle to Australia

Discover the top 2 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 647,157 searches. Data last updated 18 April 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,184Average$1,921FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$1,319Average$1,831FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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How does Cheapflights help users find flights from Seattle to Australia?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Seattle to Australia. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Australia?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Seattle to Australia.

Can Cheapflights find flights from Seattle to Australia with no change fees?

Certainly. Search results for flights to Australia from Seattle shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Seattle to Australia become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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