Find flights
When to book
Airlines
FAQs

Cheap flights from Seattle to Australia from $679

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 6/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
26 Feb — 5 Mar1
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 21 February 2025.

Round-trip from

$1,275

One-way from

$679

Popular in

December

Cheapest in

March

Average price

$1,643
Air Canada
  • Air Canada
  • 5/8-17/8
  • 4 total stops
  • 46h 51m total
  • Seattle to Australia
Search Deals
6/4
  • 6/4
  • 1 total stop
  • 26h 50m total
  • Seattle to Australia
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($299 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($79 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 21 February 2025.

Tue 5/819:15SEA - MEL
2 stops22h 50mAir Canada
Sun 17/806:00MEL - SEA
2 stops24h 01mAir Canada
Deal found 19/2$1,275
Tue 25/319:34SEA - BNE
1 stop17h 56mUnited Airlines
Wed 2/410:30BNE - SEA
1 stop22h 28mUnited Airlines
Deal found 20/2$1,370
Fri 13/619:15SEA - SYD
2 stops22h 35mMultiple Airlines
Sun 22/609:20SYD - SEA
1 stop17h 01mMultiple Airlines
Deal found 19/2$1,402
Sat 5/705:45SEA - SYD
1 stop32h 35mAir Canada
Fri 11/709:20SYD - SEA
1 stop21h 56mAir Canada
Deal found 20/2$1,408
Sat 1/1119:05SEA - CNS
2 stops25h 55mAir Canada
Wed 5/1106:00CNS - SEA
2 stops26h 30mAir Canada
Deal found 20/2$1,417
Sat 1/310:35SEA - BNE
1 stop28h 05mAir Canada
Wed 12/309:40BNE - SEA
1 stop17h 10mAir Canada
Deal found 21/2$1,422
Sun 1/619:15SEA - CNS
2 stops23h 50mMultiple Airlines
Sun 8/606:00CNS - SEA
2 stops23h 58mMultiple Airlines
Deal found 20/2$1,425
Sat 1/310:24SEA - BNE
1 stop25h 51mAmerican Airlines
Fri 14/308:05BNE - SEA
1 stop30h 05mAmerican Airlines
Deal found 20/2$1,435
Sun 13/415:06SEA - MEL
2 stops27h 49mMultiple Airlines
Sun 27/423:35MEL - SEA
2 stops38h 00mMultiple Airlines
Deal found 20/2$1,460
Thu 10/417:10SEA - SYD
1 stop20h 50mUnited Airlines
Sat 26/409:30SYD - SEA
1 stop21h 29mUnited Airlines
Deal found 20/2$1,555
Sun 13/423:30SEA - MEL
1 stop38h 00mPhilippine Airlines
Sun 27/408:00MEL - SEA
1 stop28h 20mPhilippine Airlines
Deal found 20/2$1,580
Sun 6/423:30SEA - BNE
1 stop41h 25mPhilippine Airlines
Sun 13/411:15BNE - SEA
1 stop25h 05mPhilippine Airlines
Deal found 20/2$1,599

Find flights from Seattle to Australia within your budget

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 21 February 2025.

Fly from

Seattle

Fly to

Australia

Route

Depart

Return

Price

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Tue 5/8

19:15-11:05

2 stops22h 50m

Melbourne

Sun 17/8

06:00-13:01

2 stops24h 01m

$1,275

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 25/3

19:34-06:30

1 stop17h 56m

Brisbane

Wed 2/4

10:30-15:58

1 stop22h 28m

$1,370

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Fri 13/6

19:15-10:50

2 stops22h 35m

Sydney Kingsford Smith

Sun 22/6

09:20-09:21

1 stop17h 01m

$1,402

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 5/7

05:45-07:20

1 stop32h 35m

Sydney Kingsford Smith

Fri 11/7

09:20-14:16

1 stop21h 56m

$1,408

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Wed 20/8

19:15-07:05

1 stop18h 50m

Brisbane

Wed 3/9

10:00-13:05

1 stop20h 05m

$1,422

SeattleCairns

SEA - CNS

SEACNS

Seattle/Tacoma Intl

Sun 1/6

19:15-12:05

2 stops23h 50m

Cairns

Sun 8/6

06:00-12:58

2 stops23h 58m

$1,425

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Wed 5/3

11:54-06:15

1 stop24h 21m

Brisbane

Tue 18/3

08:05-15:48

1 stop24h 43m

$1,435

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sun 13/4

15:06-11:55

2 stops27h 49m

Melbourne

Sun 27/4

23:35-20:35

2 stops38h 00m

$1,460

SeattleCairns

SEA - CNS

SEACNS

Seattle/Tacoma Intl

Sun 1/6

14:55-15:55

3 stops32h 00m

Cairns

Sun 8/6

06:00-14:13

2 stops25h 13m

$1,540

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 10/4

17:10-07:00

1 stop20h 50m

Sydney Kingsford Smith

Sat 26/4

09:30-13:59

1 stop21h 29m

$1,555

Flights are sorted by cheapest return flights first.

Deals found on 20/2

Showing 1-10 of 60 results
1
2
3
...
6

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.

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, 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 21 February 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 21 February 2025.
Read through reviews of airlines operating flights from Seattle to Australia, such as Air Tahiti Nui, EVA Air and ANA. 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
61 reviews
Check prices

Comfort

8.0

Entertainment

7.2

Food

7.8

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
Check prices

Comfort

8.0

Entertainment

7.2

Food

7.8

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
Check prices

Comfort

8.0

Entertainment

7.2

Food

7.8

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
836 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Comfort

8.0

Entertainment

7.2

Food

7.8

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
Check prices

Comfort

8.0

Entertainment

7.2

Food

7.8

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.

China Airlines
8.2
Very Good
725 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Comfort

8.0

Entertainment

7.2

Food

7.8

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 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 American Airlines, which is currently one of the cheapest options available, starting at $732. United Airlines flights start at $738 while deals on Delta start at $771 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 - Perth 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 3 airlines flying from Seattle to Australia

Discover the top 3 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 21 February 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$856Average$1,786FlexibilityNo cancel feeOn-time85%
Search Hawaiian Airlines flights
United AirlinesCheapest$1,182Average$2,089FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$1,254Average$1,782FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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!

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.