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$558+ Cheap flights from Australia to Seattle (SEA)

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 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
SYD ā€” SEA
Aug 17 ā€” Aug 241
Mon 8/17
Mon 8/24
1 adult, Economy
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Cheap flight deals from Australia to Seattle

Cheapest flights from Australia to Seattle
Explore the most affordable flight options available from Australia to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 18, 2026.

This Trip.com deal was found by Cheapflights users on 7/12. Clicking the ā€œPick Datesā€ button in this card will allow you to select your dates and further customize your flight criteria. From there, click ā€œFind dealsā€, make sure Trip.com is selected, and click ā€œCompare selectedā€ under the list of providers to see comparable flight deals.
Thu 11/122:00 pm
SYD
-
SEA
2 stops27h 46m
Multiple Airlines
Tue 11/1712:00 pm
SEA
-
SYD
2 stops29h 35m
Multiple Airlines
Deal found 7/12$878
This United Airlines deal was found by Cheapflights users on 7/14. Clicking the ā€œPick Datesā€ button in this card will allow you to select your dates and further customize your flight criteria. From there, click ā€œFind dealsā€, make sure United Airlines is selected, and click ā€œCompare selectedā€ under the list of providers to see comparable flight deals.
Wed 7/1510:55 am
MEL
-
SEA
2 stops27h 23m
United Airlines
Tue 8/43:33 pm
SEA
-
MEL
1 stop23h 42m
United Airlines
Deal found 7/14$917
This United Airlines deal was found by Cheapflights users on 7/15. Clicking the ā€œPick Datesā€ button in this card will allow you to select your dates and further customize your flight criteria. From there, click ā€œFind dealsā€, make sure United Airlines is selected, and click ā€œCompare selectedā€ under the list of providers to see comparable flight deals.
Thu 7/1610:55 am
MEL
-
SEA
1 stop18h 39m
United Airlines
Wed 7/293:33 pm
SEA
-
MEL
1 stop23h 42m
United Airlines
Deal found 7/15$918
This United Airlines deal was found by Cheapflights users on 7/13. Clicking the ā€œPick Datesā€ button in this card will allow you to select your dates and further customize your flight criteria. From there, click ā€œFind dealsā€, make sure United Airlines is selected, and click ā€œCompare selectedā€ under the list of providers to see comparable flight deals.
Tue 7/2810:55 am
MEL
-
SEA
1 stop18h 39m
United Airlines
Fri 8/2811:03 am
SEA
-
MEL
2 stops28h 12m
United Airlines
Deal found 7/13$919
This United Airlines deal was found by Cheapflights users on 7/14. Clicking the ā€œPick Datesā€ button in this card will allow you to select your dates and further customize your flight criteria. From there, click ā€œFind dealsā€, make sure United Airlines is selected, and click ā€œCompare selectedā€ under the list of providers to see comparable flight deals.
Wed 8/1910:55 am
MEL
-
SEA
2 stops23h 47m
United Airlines
Thu 9/173:30 pm
SEA
-
MEL
1 stop23h 45m
United Airlines
Deal found 7/14$920
This United Airlines deal was found by Cheapflights users on 7/16. Clicking the ā€œPick Datesā€ button in this card will allow you to select your dates and further customize your flight criteria. From there, click ā€œFind dealsā€, make sure United Airlines is selected, and click ā€œCompare selectedā€ under the list of providers to see comparable flight deals.
Sat 8/110:55 am
MEL
-
SEA
1 stop27h 08m
United Airlines
Mon 8/319:05 am
SEA
-
MEL
1 stop30h 10m
United Airlines
Deal found 7/16$924
This Flighttix deal was found by Cheapflights users on 7/17. Clicking the ā€œPick Datesā€ button in this card will allow you to select your dates and further customize your flight criteria. From there, click ā€œFind dealsā€, make sure Flighttix is selected, and click ā€œCompare selectedā€ under the list of providers to see comparable flight deals.
Mon 7/2712:00 pm
SYD
-
SEA
1 stop28h 39m
British Airways
Sun 8/97:00 am
SEA
-
SYD
1 stop31h 05m
British Airways
Deal found 7/17$942
This American Airlines deal was found by Cheapflights users on 7/14. Clicking the ā€œPick Datesā€ button in this card will allow you to select your dates and further customize your flight criteria. From there, click ā€œFind dealsā€, make sure American Airlines is selected, and click ā€œCompare selectedā€ under the list of providers to see comparable flight deals.
Mon 9/712:00 pm
SYD
-
SEA
1 stop38h 25m
American Airlines
Wed 9/237:10 am
SEA
-
SYD
1 stop30h 55m
American Airlines
Deal found 7/14$945
This United Airlines deal was found by Cheapflights users on 7/14. Clicking the ā€œPick Datesā€ button in this card will allow you to select your dates and further customize your flight criteria. From there, click ā€œFind dealsā€, make sure United Airlines is selected, and click ā€œCompare selectedā€ under the list of providers to see comparable flight deals.
Thu 8/69:30 am
SYD
-
SEA
2 stops28h 40m
United Airlines
Tue 8/187:00 am
SEA
-
SYD
2 stops30h 55m
United Airlines
Deal found 7/14$947
This American Airlines deal was found by Cheapflights users on 7/12. Clicking the ā€œPick Datesā€ button in this card will allow you to select your dates and further customize your flight criteria. From there, click ā€œFind dealsā€, make sure American Airlines is selected, and click ā€œCompare selectedā€ under the list of providers to see comparable flight deals.
Thu 11/52:05 pm
SYD
-
SEA
1 stop28h 00m
American Airlines
Sun 11/86:05 am
SEA
-
SYD
1 stop31h 55m
American Airlines
Deal found 7/12$948
This United Airlines deal was found by Cheapflights users on 7/15. Clicking the ā€œPick Datesā€ button in this card will allow you to select your dates and further customize your flight criteria. From there, click ā€œFind dealsā€, make sure United Airlines is selected, and click ā€œCompare selectedā€ under the list of providers to see comparable flight deals.
Mon 7/279:30 am
SYD
-
SEA
1 stop22h 06m
United Airlines
Wed 8/121:16 pm
SEA
-
SYD
1 stop24h 39m
United Airlines
Deal found 7/15$949
This United Airlines deal was found by Cheapflights users on 7/12. Clicking the ā€œPick Datesā€ button in this card will allow you to select your dates and further customize your flight criteria. From there, click ā€œFind dealsā€, make sure United Airlines is selected, and click ā€œCompare selectedā€ under the list of providers to see comparable flight deals.
Tue 7/2110:20 am
SYD
-
SEA
1 stop19h 14m
United Airlines
Tue 7/288:56 am
SEA
-
SYD
2 stops29h 04m
United Airlines
Deal found 7/12$950

Find flight deals from Australia to Seattle

Keep the following information in mind while searching for Australia to Seattle flight deals. Data was last updated July 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$878
(Trip.com)

One-way from

$558
(United Airlines)

Popular in

January

Cheapest in

August

Average price

$1,085
Provider with most accurate pricing for Sydney Kingsford Smith-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Seattle/Tacoma Intl flights.
Search Deals
From Australia to Seattle/Tacoma Intl
Search Deals
One-way flight from Australia to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

Ā 
Customize your flight search to find flights from Australia to Seattle 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 July 18, 2026.
Use the filters below to find and compare flights from Australia to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MelbourneSeattle

MEL - SEA

MELSEA

Melbourne

Mon 7/27

10:55 am-4:20 pm

1 stop22h 25m

Seattle/Tacoma Intl

Mon 8/3

11:02 am-7:30 am

2 stops27h 28m

$917

MelbourneSeattle

MEL - SEA

MELSEA

Melbourne

Wed 8/12

10:55 am-2:24 pm

1 stop20h 29m

Seattle/Tacoma Intl

Wed 8/19

12:44 pm-7:30 am

2 stops25h 46m

$920

MelbourneSeattle

MEL - SEA

MELSEA

Melbourne

Sun 8/23

10:55 am-12:20 pm

1 stop18h 25m

Seattle/Tacoma Intl

Tue 9/15

12:44 pm-8:15 am

2 stops26h 31m

$920

MelbourneSeattle

MEL - SEA

MELSEA

Melbourne

Fri 8/7

10:00 am-10:05 pm

2 stops29h 05m

Seattle/Tacoma Intl

Fri 8/14

7:16 am-7:50 am

1 stop31h 34m

$957

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Thu 8/6

9:15 am-12:27 pm

1 stop20h 12m

Seattle/Tacoma Intl

Tue 8/18

2:50 pm-6:50 am

1 stop23h 00m

$957

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Thu 11/5

11:20 am-4:27 pm

2 stops24h 07m

Seattle/Tacoma Intl

Sun 11/8

3:02 pm-9:20 am

2 stops23h 18m

$957

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Wed 9/2

10:20 am-11:25 am

1 stop18h 05m

Seattle/Tacoma Intl

Wed 9/23

3:30 pm-6:55 am

1 stop22h 25m

$962

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Fri 8/14

9:15 am-12:27 pm

1 stop44h 12m

Seattle/Tacoma Intl

Mon 8/31

2:50 pm-6:50 am

1 stop23h 00m

$988

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Wed 11/18

11:20 am-4:03 pm

1 stop23h 43m

Seattle/Tacoma Intl

Thu 11/19

12:20 pm-9:05 am

1 stop25h 45m

$988

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sat 8/15

9:30 am-5:42 pm

2 stops25h 12m

Seattle/Tacoma Intl

Tue 9/1

11:03 am-6:55 am

2 stops26h 52m

$989

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/14

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Australia to Seattle

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

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

Currently, March is the cheapest month in which you can book a flight from Australia to Seattle (average of $876). Flying from Australia to Seattle in December is currently the most expensive (average of $1,118). 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.

How far ahead should I book a flight from Australia to Seattle?

Booking 8 days in advance of your planned departure date is, on average, the best time to get cheap flights from Australia to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated July 18, 2026.
Get a feel of what it's like to fly with United Airlines and Air Canada from Australia to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,006 reviews

Entertainment

7.1

Boarding

7.7

Food

6.6

Comfort

7.3

Crew

8.1

Overall

7.4

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this
United Airlines
7.4
Good
10,006 reviews
United Airlines
7.4
Good
10,006 reviews

Entertainment

7.1

Boarding

7.7

Food

6.6

Comfort

7.3

Crew

8.1

Overall

7.4

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this
Air Canada
7.1
Good
11,352 reviews
United Airlines
7.4
Good
10,006 reviews

Entertainment

7.1

Boarding

7.7

Food

6.6

Comfort

7.3

Crew

8.1

Overall

7.4

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this

Related info for your journey

Find useful and relevant information for your journey from Australia to Seattle. 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 into for flights to Seattle from Australia?

    Most people fly into Seattle/Tacoma Intl (SEA) if they book a flight to Seattle from Australia. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattleā€™s city center.

  • How long is the flight from Australia to Seattle?

    United Airlines, Delta, and American Airlines can get you from Australia to Seattle in just under 22h 25m. Your travel time can differ by up to 21h 17m. The distance between Australia and Seattle is about 8180 mi. This flight may include one or multiple stops.

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

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $379. Users have also found prices from $415 and $437 on Air Canada and Hawaiian Airlines, respectively.

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

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

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Australia to Seattle (average of $876). Flying from Australia to Seattle in December is currently the most expensive (average of $1,118). 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tacoma
Lacey
Leavenworth
Olympia
Ocean Shores
Edmonds
Snoqualmie
Tumwater
Tukwila
Renton
Kent
Lynnwood
Puyallup
Ellensburg
Fife
Marysville
Lakewood
Issaquah
Shoreline

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 Australia to Seattle

Discover the top 2 airlines that operate flights from Australia to Seattle. 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 July 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$752Average$1,056FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$778Average$1,020FlexibilityNo cancel feeOn-time69%

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