Find flights
When to book
Airlines
FAQs

Cheap flights from Seattle to Australia from $606

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 27/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
8 Feb — 15 Feb1
1 adult
1 adult, Economy, 0 bags

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 9 January 2026.

Round-trip from

$1,189

One-way from

$606

Popular in

December

Cheapest in

August

Average price

$1,943
Air Canada
  • Air Canada
  • 19/2-4/3
  • 2 total stops
  • 49h 36m total
  • Seattle to Australia
Search Deals
Air Canada
  • Air Canada
  • 6/3
  • 1 total stop
  • 23h 05m total
  • Seattle to Australia
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($457 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($110 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Find 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 9 January 2026.

Thu 19/215:40SEA - BNE
1 stop23h 05mAir Canada
Wed 4/310:45BNE - SEA
1 stop26h 31mAir Canada
Deal found 7/1$1,189
Fri 20/220:00SEA - BNE
1 stop18h 45mAir Canada
Sun 1/310:45BNE - SEA
1 stop26h 31mAir Canada
Deal found 6/1$1,191
Fri 6/220:00SEA - BNE
1 stop18h 45mAir Canada
Fri 13/210:45BNE - SEA
1 stop16h 30mAir Canada
Deal found 7/1$1,197
Thu 19/215:40SEA - BNE
2 stops28h 40mMultiple Airlines
Wed 4/310:45BNE - SEA
1 stop16h 46mMultiple Airlines
Deal found 7/1$1,215
Fri 20/320:00SEA - BNE
2 stops26h 30mMultiple Airlines
Fri 10/410:00BNE - SEA
1 stop16h 33mMultiple Airlines
Deal found 8/1$1,218
Fri 6/215:40SEA - BNE
1 stop23h 05mMultiple Airlines
Fri 13/206:10BNE - SEA
2 stops21h 05mMultiple Airlines
Deal found 7/1$1,222
Sun 22/215:40SEA - BNE
2 stops27h 50mAir Canada
Sun 1/310:45BNE - SEA
1 stop16h 46mAir Canada
Deal found 7/1$1,225
Tue 10/209:55SEA - BNE
1 stop28h 50mAir Canada
Fri 27/210:45BNE - SEA
1 stop21h 46mAir Canada
Deal found 7/1$1,233
Thu 19/315:40SEA - BNE
1 stop23h 05mAir New Zealand
Fri 10/410:00BNE - SEA
1 stop22h 03mAir New Zealand
Deal found 8/1$1,248
Sat 21/220:00SEA - BNE
2 stops25h 30mMultiple Airlines
Thu 5/306:10BNE - SEA
2 stops21h 21mMultiple Airlines
Deal found 8/1$1,249
Tue 31/315:40SEA - BNE
1 stop22h 25mMultiple Airlines
Tue 7/420:40BNE - SEA
2 stops29h 53mMultiple Airlines
Deal found 7/1$1,260
Sun 8/320:00SEA - MEL
2 stops22h 25mMultiple Airlines
Wed 18/306:05MEL - SEA
2 stops21h 26mMultiple Airlines
Deal found 7/1$1,415

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

Fly from

Seattle

Fly to

Australia

Route

Depart

Return

Price

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Thu 19/2

09:55-08:45

1 stop28h 50m

Brisbane

Wed 4/3

10:45-09:31

1 stop16h 46m

$1,191

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Fri 20/2

09:55-08:45

1 stop28h 50m

Brisbane

Sun 1/3

10:45-15:01

1 stop22h 16m

$1,191

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Fri 6/2

20:00-08:45

1 stop18h 45m

Brisbane

Fri 13/2

10:45-09:15

1 stop16h 30m

$1,197

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Wed 4/3

20:00-13:25

2 stops23h 25m

Brisbane

Wed 18/3

09:45-09:31

1 stop16h 46m

$1,215

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Sun 22/2

15:40-13:30

2 stops27h 50m

Brisbane

Sun 1/3

10:45-09:31

1 stop16h 46m

$1,225

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 10/2

15:40-08:45

1 stop23h 05m

Brisbane

Fri 27/2

10:45-09:15

1 stop16h 30m

$1,233

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Sat 21/2

20:00-15:30

2 stops25h 30m

Brisbane

Thu 5/3

06:10-09:31

2 stops21h 21m

$1,249

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Fri 27/3

15:40-07:05

1 stop22h 25m

Brisbane

Sun 19/4

20:40-09:33

2 stops29h 53m

$1,261

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Sun 8/2

09:55-08:45

1 stop28h 50m

Brisbane

Thu 12/2

10:45-09:15

1 stop16h 30m

$1,282

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Sat 21/2

15:40-08:45

1 stop23h 05m

Brisbane

Sat 28/2

18:30-09:31

2 stops33h 01m

$1,283

Flights are sorted by cheapest return flights first.

Deals found on 8/1

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.

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, July is the cheapest month in which you can book a flight from Seattle to Australia (average of $757). Flying from Seattle to Australia in December is currently the most expensive (average of $1,261). 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 9 January 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
9,143 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
United Airlines
7.4
Good
9,143 reviews
United Airlines
7.4
Good
9,143 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
Air Canada
7.1
Good
10,603 reviews
United Airlines
7.4
Good
9,143 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

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?

    Air Canada, American Airlines, and United Airlines can get you from Seattle to Australia in just under 21h 30m. Your travel time can differ by up to 7h 20m. There are 13164 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 Alaska Airlines, which is currently one of the cheapest options available, starting at $526. Qantas Airways flights start at $537 while deals on ANA start at $548 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, July is the cheapest month in which you can book a flight from Seattle to Australia (average of $757). Flying from Seattle to Australia in December is currently the most expensive (average of $1,261). 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 9 January 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,192Average$2,029FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$1,254Average$1,738FlexibilityNo 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.