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Cheap flights from Seattle to Australia from $716

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 26/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
15 Jun — 22 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 16 May 2026.

Sun 24/519:20
SEA
-
SYD
1 stop19h 00m
Air Canada
Sun 7/609:20
SYD
-
SEA
1 stop30h 20m
Air Canada
Deal found 15/5$1,387
Thu 11/617:10
SEA
-
MEL
1 stop20h 35m
Qantas Airways
Wed 19/809:45
MEL
-
SEA
1 stop20h 54m
Qantas Airways
Deal found 11/5$1,457
Wed 3/615:00
SEA
-
SYD
1 stop23h 20m
Air Canada
Sun 7/609:20
SYD
-
SEA
1 stop26h 10m
Air Canada
Deal found 13/5$1,459
Sun 14/605:45
SEA
-
SYD
1 stop32h 35m
Air Canada
Sun 21/609:20
SYD
-
SEA
1 stop26h 12m
Air Canada
Deal found 15/5$1,461
Sun 2/810:45
SEA
-
SYD
1 stop27h 35m
Air Canada
Tue 25/809:20
SYD
-
SEA
1 stop17h 47m
Air Canada
Deal found 15/5$1,475
Fri 25/915:55
SEA
-
MEL
1 stop21h 50m
Qantas Airways
Fri 23/1009:45
MEL
-
SEA
1 stop20h 31m
Qantas Airways
Deal found 12/5$1,477
Tue 23/605:45
SEA
-
SYD
1 stop32h 35m
Air Canada
Tue 7/709:20
SYD
-
SEA
1 stop22h 02m
Air Canada
Deal found 15/5$1,479
Sun 24/519:20
SEA
-
SYD
1 stop19h 00m
Multiple Airlines
Sun 7/606:00
SYD
-
SEA
2 stops21h 05m
Multiple Airlines
Deal found 15/5$1,482
Sun 14/605:45
SEA
-
SYD
1 stop32h 35m
Multiple Airlines
Sun 21/609:20
SYD
-
SEA
1 stop26h 12m
Multiple Airlines
Deal found 15/5$1,484
Tue 28/715:00
SEA
-
SYD
1 stop23h 20m
Multiple Airlines
Tue 11/806:00
SYD
-
SEA
2 stops21h 07m
Multiple Airlines
Deal found 14/5$1,488
Wed 21/1015:20
SEA
-
MEL
1 stop21h 25m
Qantas Airways
Wed 11/1123:15
MEL
-
SEA
1 stop19h 49m
Qantas Airways
Deal found 14/5$1,496
Thu 21/514:25
SEA
-
MEL
1 stop23h 20m
Multiple Airlines
Wed 3/609:45
MEL
-
SEA
1 stop20h 18m
Multiple Airlines
Deal found 15/5$1,503

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 16 May 2026.

Round-trip from

$1,457

One-way from

$716

Popular in

December

Cheapest in

August

Average price

$1,467
Qantas Airways
  • Qantas Airways
  • 11/6-19/8
  • 2 total stops
  • 41h 29m total
  • Seattle to Australia
Search Deals
Philippine Airlines
  • Philippine Airlines
  • 26/8
  • 1 total stop
  • 39h 50m total
  • Seattle to Australia
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($432 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($100 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 16 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

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sat 24/10

13:16-09:00

1 stop25h 44m

Melbourne

Sun 8/11

13:00-12:12

1 stop18h 12m

$1,519

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Fri 23/10

16:30-08:30

1 stop22h 00m

Melbourne

Thu 12/11

13:00-14:18

1 stop20h 18m

$1,519

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Wed 21/10

16:30-08:30

1 stop22h 00m

Melbourne

Thu 12/11

13:00-12:12

1 stop18h 12m

$1,519

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Fri 23/10

12:15-08:30

1 stop26h 15m

Melbourne

Wed 11/11

11:30-11:33

1 stop19h 03m

$1,519

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Mon 5/10

15:30-09:15

1 stop23h 45m

Melbourne

Tue 13/10

11:55-20:44

1 stop26h 49m

$1,527
Fastest return journey

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Thu 6/8

19:05-08:15

1 stop20h 10m

Melbourne

Wed 26/8

09:30-11:34

1 stop19h 04m

$1,527

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Mon 1/6

17:20-08:15

1 stop21h 55m

Melbourne

Mon 15/6

10:55-14:30

1 stop20h 35m

$1,527

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Fri 16/10

18:55-08:50

1 stop19h 55m

Melbourne

Tue 27/10

11:00-14:50

2 stops21h 50m

$1,544

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Fri 25/9

09:40-07:50

2 stops29h 10m

Melbourne

Fri 23/10

11:00-13:00

1 stop20h 00m

$1,544

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Wed 5/8

05:15-07:50

2 stops33h 35m

Melbourne

Fri 21/8

10:00-12:27

1 stop19h 27m

$1,544

Flights are sorted by cheapest return flights first.

Deals found on 15/5

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 72 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 $135). Flying from Seattle to Australia in September is currently the most expensive (average of $1,086). 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 16 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
9,726 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
9,726 reviews
United Airlines
7.4
Good
9,726 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
Air Canada
7.1
Good
11,046 reviews
United Airlines
7.4
Good
9,726 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

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?

    United Airlines, Qantas Airways, and Air Canada can get you from Seattle to Australia in just under 18h 45m. Your travel time can differ by up to 6h 59m. There are 11822 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 $512. Qantas Airways flights start at $515 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 - Melbourne, Seattle/Tacoma Intl - Sydney Kingsford Smith 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 $135). Flying from Seattle to Australia in September is currently the most expensive (average of $1,086). 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 16 May 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$603Average$1,761FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,115Average$2,011FlexibilityNo 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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