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Cheap flights from Seattle to Australia from $602

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
18 Jun — 25 Jun1
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 13 June 2025.

Round-trip from

$1,193

One-way from

$602

Popular in

December

Cheapest in

March

Average price

$1,672
Air Canada
  • Air Canada
  • 7/9-16/9
  • 2 total stops
  • 44h 11m total
  • Seattle to Australia
Search Deals
9/9
  • 9/9
  • 2 total stops
  • 37h 40m total
  • Seattle to Australia
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($328 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($76 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 13 June 2025.

Sun 7/914:55SEA - SYD
1 stop23h 25mAir Canada
Tue 16/909:20SYD - SEA
1 stop20h 46mAir Canada
Deal found 11/6$1,193
Wed 27/814:32SEA - SYD
1 stop23h 58mQantas Airways
Tue 16/909:10SYD - SEA
1 stop20h 40mQantas Airways
Deal found 12/6$1,217
Sun 14/919:15SEA - MEL
2 stops23h 10mMultiple Airlines
Thu 20/1108:10MEL - SEA
2 stops20h 06mMultiple Airlines
Deal found 13/6$1,239
Tue 16/914:55SEA - MEL
2 stops27h 10mAir Canada
Thu 2/1006:00MEL - SEA
2 stops25h 16mAir Canada
Deal found 11/6$1,248
Mon 4/818:09SEA - SYD
1 stop20h 21mMultiple Airlines
Sun 17/809:10SYD - SEA
1 stop18h 39mMultiple Airlines
Deal found 12/6$1,260
Sat 2/814:30SEA - SYD
1 stop24h 00mAmerican Airlines
Sun 24/817:45SYD - SEA
1 stop20h 48mAmerican Airlines
Deal found 12/6$1,282
Fri 1/805:10SEA - SYD
1 stop32h 45mUnited Airlines
Mon 11/809:30SYD - SEA
2 stops28h 27mUnited Airlines
Deal found 12/6$1,294
Sun 3/814:24SEA - SYD
1 stop23h 11mDelta
Sat 16/809:25SYD - SEA
1 stop20h 09mDelta
Deal found 11/6$1,305
Wed 27/810:00SEA - SYD
2 stops30h 25mANA
Tue 16/911:50SYD - SEA
2 stops23h 46mANA
Deal found 12/6$1,375
Wed 27/823:35SEA - MEL
1 stop36h 25mPhilippine Airlines
Wed 10/908:00MEL - SEA
1 stop28h 15mPhilippine Airlines
Deal found 12/6$1,394
Sat 6/919:15SEA - CNS
2 stops22h 50mMultiple Airlines
Thu 11/919:15CNS - SEA
2 stops40h 21mMultiple Airlines
Deal found 12/6$1,398
Thu 4/1217:40SEA - SYD
1 stop20h 20mAlaska Airlines
Mon 2/311:15SYD - SEA
1 stop20h 41mAlaska Airlines
Deal found 10/6$1,400

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 13 June 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 7/9

14:55-07:20

1 stop23h 25m

Sydney Kingsford Smith

Tue 16/9

09:20-13:06

1 stop20h 46m

$1,193

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 14/8

17:55-07:05

1 stop20h 10m

Sydney Kingsford Smith

Tue 9/9

09:10-20:24

1 stop28h 14m

$1,217

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sun 14/9

19:15-11:25

2 stops23h 10m

Melbourne

Thu 20/11

08:10-09:16

2 stops20h 06m

$1,239

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Tue 16/9

14:55-11:05

2 stops27h 10m

Melbourne

Thu 2/10

06:00-14:16

2 stops25h 16m

$1,248

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 4/8

18:09-07:30

1 stop20h 21m

Sydney Kingsford Smith

Sun 17/8

09:10-10:49

1 stop18h 39m

$1,260

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 2/8

14:30-07:30

1 stop24h 00m

Sydney Kingsford Smith

Sun 24/8

17:45-21:33

1 stop20h 48m

$1,282

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Fri 1/8

05:10-06:55

1 stop32h 45m

Sydney Kingsford Smith

Mon 11/8

10:20-10:48

1 stop17h 28m

$1,294

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 3/8

14:24-06:35

1 stop23h 11m

Sydney Kingsford Smith

Sat 16/8

09:25-12:34

1 stop20h 09m

$1,305

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 27/8

10:00-09:25

2 stops30h 25m

Sydney Kingsford Smith

Tue 16/9

11:50-18:36

2 stops23h 46m

$1,375

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Wed 27/8

23:35-05:00

1 stop36h 25m

Melbourne

Wed 10/9

08:00-19:15

1 stop28h 15m

$1,394

Flights are sorted by cheapest return flights first.

Deals found on 12/6

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 13 June 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 13 June 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
8.7
Very Good
64 reviews
Check prices

Crew

9.0

Overall

8.7

Food

7.8

Comfort

8.1

Entertainment

7.3

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
64 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Crew

9.0

Overall

8.7

Food

7.8

Comfort

8.1

Entertainment

7.3

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
1,202 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Crew

9.0

Overall

8.7

Food

7.8

Comfort

8.1

Entertainment

7.3

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
1,490 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Crew

9.0

Overall

8.7

Food

7.8

Comfort

8.1

Entertainment

7.3

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.
China Airlines
8.3
Very Good
738 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Crew

9.0

Overall

8.7

Food

7.8

Comfort

8.1

Entertainment

7.3

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
8.3
Very Good
882 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Crew

9.0

Overall

8.7

Food

7.8

Comfort

8.1

Entertainment

7.3

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 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 Qantas Airways, which is currently one of the cheapest options available, starting at $616. Air Canada flights start at $636 while deals on American Airlines start at $657 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 - Brisbane 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 13 June 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,158Average$1,889FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$1,290Average$1,785FlexibilityNo 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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