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Cheap flights from Seattle to Australia from $710

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 30/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
23 Aug — 30 Aug1
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 24 July 2026.

Sun 26/716:30
SEA
-
SYD
1 stop33h 40m
ANA
Tue 11/811:45
SYD
-
SEA
2 stops23h 47m
ANA
Deal found 23/7$1,326
Tue 20/1011:06
SEA
-
SYD
1 stop26h 24m
Multiple Airlines
Tue 27/1014:00
SYD
-
SEA
2 stops22h 26m
Multiple Airlines
Deal found 21/7$1,339
Tue 8/1212:57
SEA
-
BNE
2 stops29h 53m
Qantas Airways
Sat 26/1213:10
BNE
-
SEA
1 stop23h 33m
Qantas Airways
Deal found 22/7$1,346
Mon 12/1011:06
SEA
-
SYD
1 stop26h 24m
Multiple Airlines
Wed 28/1014:00
SYD
-
SEA
2 stops22h 26m
Multiple Airlines
Deal found 21/7$1,374
Mon 19/1011:06
SEA
-
MEL
2 stops32h 19m
Multiple Airlines
Mon 2/1113:35
MEL
-
SEA
2 stops23h 51m
Multiple Airlines
Deal found 19/7$1,378
Sun 2/810:40
SEA
-
SYD
2 stops29h 45m
Multiple Airlines
Wed 19/811:45
SYD
-
SEA
2 stops23h 47m
Multiple Airlines
Deal found 21/7$1,381
Sun 2/810:40
SEA
-
SYD
2 stops29h 45m
ANA
Wed 19/811:45
SYD
-
SEA
2 stops23h 47m
ANA
Deal found 21/7$1,382
Sun 2/810:40
SEA
-
SYD
2 stops29h 45m
ANA
Tue 18/811:45
SYD
-
SEA
2 stops23h 47m
ANA
Deal found 21/7$1,384
Sun 23/816:30
SEA
-
SYD
1 stop23h 55m
Multiple Airlines
Wed 21/1014:15
SYD
-
SEA
2 stops22h 11m
Multiple Airlines
Deal found 21/7$1,385
Sun 16/816:30
SEA
-
SYD
1 stop23h 55m
ANA
Wed 14/1012:45
SYD
-
SEA
2 stops23h 47m
ANA
Deal found 21/7$1,392
Mon 3/816:30
SEA
-
SYD
1 stop23h 55m
ANA
Tue 18/820:55
SYD
-
SEA
1 stop34h 30m
ANA
Deal found 23/7$1,394
Tue 18/816:30
SEA
-
SYD
1 stop23h 55m
Multiple Airlines
Tue 13/1014:15
SYD
-
SEA
2 stops22h 11m
Multiple Airlines
Deal found 21/7$1,396

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 24 July 2026.

Round-trip from

$1,339

One-way from

$710

Popular in

December

Cheapest in

August

Average price

$1,861
20/10-27/10
  • 20/10-27/10
  • 3 total stops
  • 48h 50m total
  • Seattle to Australia
Search Deals
ANA
  • ANA
  • 30/8
  • 2 total stops
  • 29h 45m total
  • Seattle to Australia
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($485 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($104 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 24 July 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

Mon 3/8

09:40-07:50

2 stops29h 10m

Melbourne

Sun 16/8

10:00-12:27

1 stop19h 27m

$1,422

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 8/8

17:15-07:00

2 stops44h 45m

Sydney Kingsford Smith

Sun 23/8

10:20-16:14

1 stop22h 54m

$1,444

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Mon 5/10

09:59-08:50

1 stop28h 51m

Melbourne

Tue 13/10

11:00-14:50

1 stop21h 50m

$1,501

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Mon 19/10

14:30-08:50

1 stop24h 20m

Melbourne

Mon 2/11

12:00-14:50

1 stop21h 50m

$1,501

SeattleMelbourne

SEA - AVV

SEAAVV

Seattle/Tacoma Intl

Mon 5/10

19:20-14:10

2 stops24h 50m

Melbourne Avalon

Tue 13/10

06:00-14:22

2 stops26h 22m

$1,505

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Wed 16/9

11:03-07:30

2 stops27h 27m

Melbourne

Mon 28/9

10:55-16:19

1 stop22h 24m

$1,530

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Mon 5/10

05:00-09:15

2 stops34h 15m

Melbourne

Tue 13/10

11:55-12:23

1 stop18h 28m

$1,531
Fastest return journey

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 26/8

17:02-07:30

1 stop21h 28m

Sydney Kingsford Smith

Wed 2/9

17:50-19:39

1 stop18h 49m

$1,541

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Wed 19/8

19:35-08:15

1 stop19h 40m

Melbourne

Sat 29/8

18:00-15:45

2 stops38h 45m

$1,544

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 10/8

15:35-06:55

1 stop22h 20m

Sydney Kingsford Smith

Fri 4/9

10:20-12:20

1 stop19h 00m

$1,558

Flights are sorted by cheapest return flights first.

Deals found on 24/7

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

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

Currently, February is the cheapest month in which you can book a flight from Seattle to Australia (average of $1,385). Flying from Seattle to Australia in December is currently the most expensive (average of $2,371). 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 Seattle to Australia?

Booking 90 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.

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 24 July 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
10,029 reviews
Check prices

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
6.0
Good

ROHIT,June 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this
United Airlines
7.4
Good
10,029 reviews
United Airlines
7.4
Good
10,029 reviews
Check prices

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
6.0
Good

ROHIT,June 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this
Air Canada
7.1
Good
11,381 reviews
United Airlines
7.4
Good
10,029 reviews
Check prices

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
6.0
Good

ROHIT,June 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 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?

    Delta, United Airlines, and American Airlines can get you from Seattle to Australia in just under 24h 18m. Your travel time can differ by up to 20h 27m. There are 11856 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 Qantas Airways, which is currently one of the cheapest options available, starting at $531. United Airlines flights start at $574 while deals on Air Canada start at $615 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 - Melbourne Avalon 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, February is the cheapest month in which you can book a flight from Seattle to Australia (average of $1,385). Flying from Seattle to Australia in December is currently the most expensive (average of $2,371). 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 24 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$618Average$1,763FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,191Average$1,871FlexibilityNo 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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