How long is the flight from Seattle to Australia?

Qantas Airways, Air Canada, and United Airlines can get you from Seattle to Australia in just under 21h 30m. Your travel time can differ by up to 10h 44m. 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. Find deals

In terms of precipitation, rainfall in Australia ranges from 50.0 - 130.0 inches per month. March is typically the wettest month, when rainfall can reach 130.0 mm. September is typically the driest time to visit Australia when rainfall is around 50.0 mm. Find deals

If weather is an important factor for your trip to Australia, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 22.0 C. Travellers hoping to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 11.0 C). Find deals

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.

What is the cheapest month to fly from Seattle to Australia?

February can be a great time to fly to Australia from Seattle with a flight ticket averaging about $1,709. Cheapflights users have found deals in the month of February for as cheap as $1,170. The most expensive prices can be found in the month of December.

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.

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.

$563+ Flights from Seattle to Australia

Cheap flight deals from Seattle to Australia

Round-trip from	$1,231
One-way from	$563
Popular in	December
Cheapest in	February
Average price	$1,665

Qantas Airways
4/11-11/11
2 total stops
42h 12m total
Seattle to Australia

Search Deals

Air Canada
1/9
1 total stop
23h 25m total
Seattle to Australia

Search Deals

Highest demand for flights based on searches. 12% potential increase in price ($373 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($68 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2025

Search Deals

Find flight deals from Seattle to Australia

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 29 August 2025.

Tue 4/1116:30SEA - SYD

1 stop21h 30mQantas Airways

Tue 11/1111:20SYD - SEA

1 stop20h 42mQantas Airways

Deal found 26/8$1,231

Sun 19/1019:15SEA - SYD

2 stops22h 25mAir Canada

Tue 28/1008:00SYD - SEA

2 stops24h 26mAir Canada

Deal found 28/8$1,245

Sat 18/1017:59SEA - SYD

1 stop20h 06mMultiple Airlines

Wed 22/1017:20SYD - SEA

2 stops30h 54mMultiple Airlines

Deal found 28/8$1,246

Wed 1/1008:25SEA - SYD

1 stop18h 20mAlaska Airlines

Thu 16/1021:40SYD - SEA

1 stop18h 15mAlaska Airlines

Deal found 27/8$1,254

Fri 5/908:15SEA - SYD

1 stop18h 30mHawaiian Airlines

Sat 13/921:40SYD - SEA

1 stop25h 35mHawaiian Airlines

Deal found 27/8$1,258

Mon 1/1218:41SEA - SYD

1 stop19h 19mAmerican Airlines

Sun 14/1217:45SYD - SEA

1 stop23h 40mAmerican Airlines

Deal found 28/8$1,266

Sat 1/1107:00SEA - SYD

1 stop18h 45mAlaska Airlines

Thu 6/1121:40SYD - SEA

2 stops20h 12mAlaska Airlines

Deal found 27/8$1,268

Wed 10/1220:00SEA - SYD

1 stop39h 55mAir Canada

Thu 25/1216:00SYD - SEA

1 stop25h 06mAir Canada

Deal found 28/8$1,269

Thu 25/1205:50SEA - SYD

1 stop30h 05mAir Canada

Thu 15/109:00SYD - SEA

2 stops24h 26mAir Canada

Deal found 28/8$1,271

Mon 3/1114:55SEA - SYD

2 stops23h 05mAmerican Airlines

Mon 24/1111:20SYD - SEA

1 stop25h 51mAmerican Airlines

Deal found 28/8$1,272

Mon 20/1014:42SEA - SYD

1 stop22h 48mAmerican Airlines

Wed 5/1111:20SYD - SEA

2 stops21h 48mAmerican Airlines

Deal found 28/8$1,274

Mon 10/1116:30SEA - SYD

1 stop21h 30mQantas Airways

Sun 23/1117:45SYD - SEA

1 stop19h 26mQantas Airways

Deal found 28/8$1,277

Best flights from Seattle to Australia
Discover carefully curated flight deals from Seattle to Australia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 29 August 2025.

Tue 4/1116:30SEA - SYD

1 stop21h 30mQantas Airways

Tue 11/1111:20SYD - SEA

1 stop20h 42mQantas Airways

Deal found 26/8$1,231

Sun 19/1019:15SEA - SYD

2 stops22h 25mAir Canada

Sun 26/1008:00SYD - SEA

2 stops24h 26mAir Canada

Deal found 27/8$1,245

Sat 18/1017:59SEA - SYD

1 stop20h 06mMultiple Airlines

Wed 22/1017:20SYD - SEA

2 stops30h 54mMultiple Airlines

Deal found 28/8$1,246

Wed 1/1008:25SEA - SYD

1 stop18h 20mAlaska Airlines

Sun 19/1021:40SYD - SEA

1 stop27h 20mAlaska Airlines

Deal found 27/8$1,254

Fri 5/908:15SEA - SYD

1 stop18h 30mHawaiian Airlines

Sat 13/921:40SYD - SEA

1 stop25h 35mHawaiian Airlines

Deal found 27/8$1,258

Sat 27/907:25SEA - BNE

1 stop29h 00mAmerican Airlines

Sat 4/1020:05BNE - SEA

1 stop18h 53mAmerican Airlines

Deal found 28/8$1,404

Wed 22/1017:31SEA - HBA

2 stops32h 14mUnited Airlines

Wed 5/1106:20HBA - SEA

3 stops33h 31mUnited Airlines

Deal found 28/8$1,709

Sun 19/1006:35SEA - CNS

2 stops34h 10mAir New Zealand

Sat 25/1017:20CNS - SEA

3 stops39h 55mAir New Zealand

Deal found 27/8$2,109

Sun 7/919:15SEA - SYD

2 stops23h 25mAir Canada

Wed 24/906:30SYD - SEA

2 stops19h 52mAir Canada

Deal found 27/8$1,245

Wed 1/1008:25SEA - SYD

1 stop18h 20mAlaska Airlines

Thu 16/1021:40SYD - SEA

1 stop18h 15mAlaska Airlines

Deal found 27/8$1,254

Wed 12/1107:00SEA - SYD

1 stop17h 45mHawaiian Airlines

Tue 18/1121:40SYD - SEA

1 stop17h 29mHawaiian Airlines

Deal found 27/8$1,258

Sat 11/1016:30SEA - ADL

1 stop30h 50mQatar Airways

Sat 18/1018:20ADL - SEA

2 stops35h 55mQatar Airways

Deal found 27/8$2,713

Last-minute flights from Seattle to Australia
Discover last-minute flight deals from Seattle to Australia. Data last updated 29 August 2025 and is based on user searches.

Sun 31/814:29SEA - SYD

1 stop23h 26mUnited Airlines

Tue 2/910:20SYD - SEA

1 stop29h 39mUnited Airlines

Deal found 27/8$1,329

Mon 1/917:14SEA - SYD

1 stop20h 46mUnited Airlines

Wed 3/909:30SYD - SEA

2 stops28h 52mUnited Airlines

Deal found 28/8$1,326

Fri 5/908:15SEA - SYD

1 stop18h 30mHawaiian Airlines

Sat 13/921:40SYD - SEA

1 stop25h 35mHawaiian Airlines

Deal found 27/8$1,258

Sun 7/919:15SEA - SYD

2 stops23h 25mAir Canada

Wed 24/906:30SYD - SEA

2 stops19h 52mAir Canada

Deal found 27/8$1,245

Wed 10/908:15SEA - SYD

1 stop18h 30mAlaska Airlines

Thu 18/921:40SYD - SEA

2 stops25h 55mAlaska Airlines

Deal found 27/8$1,268

Sat 13/915:23SEA - SYD

1 stop22h 42mQantas Airways

Sat 20/909:10SYD - SEA

1 stop28h 14mQantas Airways

Deal found 27/8$1,286

Sun 14/916:55SEA - SYD

1 stop33h 50mHawaiian Airlines

Fri 19/921:40SYD - SEA

1 stop25h 35mHawaiian Airlines

Deal found 27/8$1,294

Tue 16/918:05SEA - SYD

1 stop19h 00mMultiple Airlines

Sun 28/909:10SYD - SEA

1 stop18h 48mMultiple Airlines

Deal found 28/8$1,254

Sat 20/917:35SEA - SYD

1 stop20h 20mUnited Airlines

Wed 1/1009:30SYD - SEA

2 stops28h 45mUnited Airlines

Deal found 27/8$1,291

Sat 20/917:05SEA - SYD

1 stop21h 00mQantas Airways

Sat 27/909:10SYD - SEA

1 stop28h 14mQantas Airways

Deal found 28/8$1,292

Mon 29/911:10SEA - SYD

2 stops26h 50mUnited Airlines

Thu 16/1011:20SYD - SEA

1 stop25h 25mUnited Airlines

Deal found 27/8$1,278

Tue 30/917:40SEA - SYD

1 stop19h 55mDelta

Wed 15/1010:25SYD - SEA

2 stops29h 57mDelta

Deal found 27/8$1,298

One-way flights from Seattle to Australia
Search for one-way flight options from Seattle to Australia. Find affordable one-way fares based on user searches. Data last updated 29 August 2025.

Mon 1/914:55SEA - SYD

1 stop23h 25mAir Canada

Deal found 27/8$563

Wed 3/923:35SEA - SYD

1 stop39h 25mPhilippine Airlines

Deal found 26/8$573

Wed 12/1116:30SEA - SYD

1 stop19h 55mQantas Airways

Deal found 28/8$579

Thu 23/1014:42SEA - SYD

1 stop23h 23mQantas Airways

Deal found 27/8$582

Mon 15/917:59SEA - SYD

1 stop20h 06mMultiple Airlines

Deal found 26/8$590

Sun 1/220:00SEA - MEL

2 stops24h 35mAir Canada

Deal found 27/8$592

Wed 26/1108:00SEA - SYD

1 stop28h 25mMultiple Airlines

Deal found 27/8$592

Mon 15/911:40SEA - SYD

2 stops26h 25mAmerican Airlines

Deal found 27/8$596

Mon 1/905:30SEA - SYD

2 stops44h 50mMultiple Airlines

Deal found 27/8$598

Mon 8/905:30SEA - MEL

2 stops37h 05mAir Canada

Deal found 28/8$607

Sat 15/1117:07SEA - SYD

1 stop20h 58mUnited Airlines

Deal found 28/8$609

Sun 31/814:32SEA - SYD

1 stop23h 33mQantas Airways

Deal found 27/8$610

Fly from

Fly to

Route

Depart

Return

Price

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 4/11

16:30-09:00

1 stop21h 30m

Sydney Kingsford Smith

Tue 11/11

11:20-13:02

1 stop20h 42m

$1,231

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 19/10

19:15-11:40

2 stops22h 25m

Sydney Kingsford Smith

Sun 26/10

08:00-14:26

2 stops24h 26m

$1,245

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 7/9

19:15-11:40

2 stops23h 25m

Sydney Kingsford Smith

Wed 24/9

06:30-09:22

2 stops19h 52m

$1,245

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 19/10

19:15-11:40

2 stops22h 25m

Sydney Kingsford Smith

Tue 28/10

08:00-14:26

2 stops24h 26m

$1,245

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 18/10

17:59-08:05

1 stop20h 06m

Sydney Kingsford Smith

Wed 22/10

17:20-06:14

2 stops30h 54m

$1,246

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Tue 10/2

20:00-14:15

2 stops23h 15m

Melbourne

Fri 27/2

07:10-09:31

2 stops21h 21m

$1,246

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Tue 10/2

20:00-15:15

2 stops24h 15m

Melbourne

Thu 19/3

07:10-15:01

2 stops25h 51m

$1,248

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 1/10

08:25-19:45

1 stop18h 20m

Sydney Kingsford Smith

Sun 19/10

21:40-07:00

1 stop27h 20m

$1,254

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 1/10

08:25-19:45

1 stop18h 20m

Sydney Kingsford Smith

Thu 16/10

21:40-21:55

1 stop18h 15m

$1,254

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 1/10

08:25-19:45

1 stop18h 20m

Sydney Kingsford Smith

Fri 17/10

21:40-21:55

1 stop18h 15m

$1,254

Flights are sorted by cheapest return flights first.

Deals found on 28/8

Showing 1-10 of 60 results

...

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, May is the cheapest month in which you can book a flight from Seattle to Australia (average of $129). Flying from Seattle to Australia in October is currently the most expensive (average of $171). 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.

What is the cheapest time of day to fly from SEA to AU?

When flying from Seattle to Australia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Australia

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

8,941 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

United Airlines

7.4

Good

8,941 reviews

United Airlines

7.4

Good

8,941 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Air Canada

7.1

Good

10,000 reviews

United Airlines

7.4

Good

8,941 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

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, Air Canada, and United Airlines can get you from Seattle to Australia in just under 21h 30m. Your travel time can differ by up to 10h 44m. 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 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, May is the cheapest month in which you can book a flight from Seattle to Australia (average of $129). Flying from Seattle to Australia in October is currently the most expensive (average of $171). 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

Top 2 airlines flying from Seattle to Australia

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$1,224	Average$1,920	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Air Canada	Cheapest$1,288	Average$1,747	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

Fly with Cheapflights

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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Cheap flights from Seattle to Australia from $563

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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.

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 29 August 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Seattle to Australia

Cheapest flights from Seattle to AustraliaExplore 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 29 August 2025.

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 29 August 2025.

Cheapflights Fare Finder

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

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.

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?

What is the cheapest time of day to fly from SEA to AU?

Find hourly flight availability from Seattle to Australia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 August 2025.

Reviews of airlines servicing Australia

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.

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?

How long is the flight from Seattle to Australia?

What are the most popular routes from Seattle to Australia?

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

How can I find direct flights from Seattle to Australia?

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

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

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.

Alternative routes for Seattle to Australia

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from Seattle to Australia

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?

Why should you use Cheapflights to find cheap flight tickets from Seattle to Australia?

Can Cheapflights find flights from Seattle to Australia with no change fees?

Can Cheapflights notify me if prices for flights from Seattle to Australia become cheaper?

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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 29 August 2025.