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Cheap flights from Seattle to Australia from $683

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 19/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
31 May — 7 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Australia

Enter your travel dates to find the best prices.

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 1 May 2026.

Sun 3/519:20
SEA
-
SYD
1 stop19h 00m
Air Canada
Tue 19/509:20
SYD
-
SEA
1 stop17h 45m
Air Canada
Deal found 26/4$1,443
Mon 4/516:30
SEA
-
SYD
1 stop23h 55m
ANA
Tue 19/520:55
SYD
-
SEA
1 stop34h 30m
ANA
Deal found 30/4$1,453
Mon 1/618:14
SEA
-
SYD
1 stop20h 16m
Multiple Airlines
Mon 29/609:10
SYD
-
SEA
1 stop19h 42m
Multiple Airlines
Deal found 29/4$1,470
Sun 3/516:30
SEA
-
SYD
1 stop33h 40m
ANA
Tue 19/520:55
SYD
-
SEA
1 stop34h 30m
ANA
Deal found 26/4$1,472
Sat 23/517:31
SEA
-
SYD
1 stop20h 34m
Multiple Airlines
Fri 5/609:10
SYD
-
SEA
1 stop19h 51m
Multiple Airlines
Deal found 29/4$1,474
Fri 25/915:55
SEA
-
MEL
1 stop21h 50m
Qantas Airways
Fri 23/1009:45
MEL
-
SEA
1 stop20h 35m
Qantas Airways
Deal found 29/4$1,477
Mon 18/518:40
SEA
-
SYD
1 stop19h 50m
Multiple Airlines
Wed 3/609:10
SYD
-
SEA
1 stop18h 51m
Multiple Airlines
Deal found 28/4$1,481
Fri 25/915:55
SEA
-
MEL
1 stop21h 50m
Multiple Airlines
Fri 23/1009:45
MEL
-
SEA
1 stop22h 57m
Multiple Airlines
Deal found 30/4$1,486
Thu 30/714:20
SEA
-
SYD
1 stop23h 45m
Qantas Airways
Tue 25/817:50
SYD
-
SEA
1 stop18h 52m
Qantas Airways
Deal found 28/4$1,488
Sat 1/814:20
SEA
-
SYD
1 stop23h 45m
Qantas Airways
Fri 14/817:50
SYD
-
SEA
1 stop20h 06m
Qantas Airways
Deal found 29/4$1,493
Mon 11/516:30
SEA
-
SYD
1 stop33h 40m
ANA
Tue 19/520:55
SYD
-
SEA
1 stop34h 30m
ANA
Deal found 29/4$1,496
Thu 30/711:40
SEA
-
MEL
2 stops26h 05m
American Airlines
Tue 25/809:45
MEL
-
SEA
1 stop23h 47m
American Airlines
Deal found 28/4$1,500

Find flight deals from Seattle to Australia

Keep the following information in mind while searching for Seattle to Australia flight deals. Data was last updated 1 May 2026.

Round-trip from

$1,470

One-way from

$683

Popular in

December

Cheapest in

August

Average price

$1,545
1/6-29/6
  • 1/6-29/6
  • 2 total stops
  • 39h 58m total
  • Seattle to Australia
Search Deals
19/5
  • 19/5
  • 2 total stops
  • 42h 04m total
  • Seattle to Australia
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($401 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($94 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

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 1 May 2026.
Use the filters below to find and compare flights from Seattle to Australia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Thu 6/8

15:33-08:15

1 stop23h 42m

Melbourne

Tue 18/8

10:55-12:23

1 stop18h 28m

$1,525

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Tue 9/6

11:02-08:15

2 stops28h 13m

Melbourne

Tue 16/6

10:55-17:59

2 stops24h 04m

$1,532

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 14/6

10:29-06:55

1 stop27h 26m

Sydney Kingsford Smith

Mon 6/7

09:30-21:10

2 stops28h 40m

$1,535

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Mon 5/10

18:55-08:50

1 stop19h 55m

Melbourne

Tue 13/10

11:00-20:31

1 stop27h 31m

$1,537

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 26/5

19:05-06:55

1 stop18h 50m

Sydney Kingsford Smith

Tue 2/6

09:30-23:10

3 stops30h 40m

$1,544

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 2/6

12:50-07:00

2 stops25h 10m

Sydney Kingsford Smith

Tue 9/6

10:20-17:59

2 stops24h 39m

$1,544

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 18/5

12:51-07:00

2 stops25h 09m

Sydney Kingsford Smith

Sun 7/6

09:30-15:55

2 stops23h 25m

$1,544

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 17/5

05:05-07:00

2 stops32h 55m

Sydney Kingsford Smith

Thu 11/6

09:30-17:59

2 stops25h 29m

$1,613

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 1/8

07:15-06:50

2 stops30h 35m

Sydney Kingsford Smith

Fri 14/8

09:15-18:29

2 stops26h 14m

$1,682

SeattleMelbourne

SEA - AVV

SEAAVV

Seattle/Tacoma Intl

Sat 30/5

19:20-14:20

2 stops26h 00m

Melbourne Avalon

Sat 6/6

20:40-10:05

2 stops30h 25m

$1,717

Flights are sorted by cheapest return flights first.

Deals found on 27/4

Showing 1-10 of 60 resultsSorted by cheapest first
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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

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

Booking 23 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Australia. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, January is the cheapest month in which you can book a flight from Seattle to Australia (average of $136). Flying from Seattle to Australia in March is currently the most expensive (average of $1,087). 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.

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 1 May 2026.
Read reviews from past customers who have flown with United Airlines and Air Canada from Seattle to Australia. 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.
United Airlines
7.4
Good
9,675 reviews
Check prices

Overall

7.4

Crew

8.1

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,675 reviews
United Airlines
7.4
Good
9,675 reviews
Check prices

Overall

7.4

Crew

8.1

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
Air Canada
7.1
Good
10,983 reviews
United Airlines
7.4
Good
9,675 reviews
Check prices

Overall

7.4

Crew

8.1

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

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.

  • How long is the flight from Seattle to Australia?

    Qantas Airways, United Airlines, and Delta can get you from Seattle to Australia in just under 23h 45m. Your travel time can differ by up to 5h 35m. There are 12463 km between Seattle and Australia. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    To fly one-way, consider booking your trip with ANA, which is currently one of the cheapest options available, starting at $513. Qantas Airways flights start at $516 while deals on United Airlines start at $560 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, January is the cheapest month in which you can book a flight from Seattle to Australia (average of $136). Flying from Seattle to Australia in March is currently the most expensive (average of $1,087). 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 1 May 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$604Average$1,763FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,116Average$2,013FlexibilityNo cancel feeOn-time69%
Search United Airlines 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!

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