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 $550. American Airlines flights start at $599 while deals on United Airlines start at $605 one-way. 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 $1,714. Cheapflights users have found deals in the month of February for as cheap as $1,156. 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.

$550+ Flights from Seattle to Australia

Cheap flight deals from Seattle to Australia

Round-trip from	$1,177
One-way from	$550
Popular in	December
Cheapest in	February
Average price	$1,637

Qantas Airways
19/8-29/8
2 total stops
49h 33m total
Seattle to Australia

Search Deals

Qantas Airways
4/11
1 total stop
19h 30m total
Seattle to Australia

Search Deals

Highest demand for flights based on searches. 12% potential increase in price ($368 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 July 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 15 July 2025.

Mon 3/1118:30SEA - SYD

1 stop19h 30mQantas Airways

Mon 24/1117:45SYD - SEA

1 stop19h 59mQantas Airways

Deal found 13/7$1,197

Sun 7/914:55SEA - SYD

1 stop23h 25mAir Canada

Tue 16/909:20SYD - SEA

1 stop26h 16mAir Canada

Deal found 13/7$1,201

Thu 28/815:43SEA - SYD

1 stop22h 12mAmerican Airlines

Wed 10/909:10SYD - SEA

1 stop29h 48mAmerican Airlines

Deal found 13/7$1,241

Thu 14/819:34SEA - SYD

2 stops30h 41mANA

Tue 9/911:50SYD - SEA

2 stops23h 46mANA

Deal found 13/7$1,259

Wed 1/1016:59SEA - SYD

1 stop21h 06mMultiple Airlines

Sat 11/1018:45SYD - SEA

1 stop19h 22mMultiple Airlines

Deal found 14/7$1,261

Sat 2/812:49SEA - SYD

2 stops25h 11mUnited Airlines

Sat 16/810:20SYD - SEA

1 stop20h 13mUnited Airlines

Deal found 13/7$1,262

Fri 26/921:20SEA - SYD

2 stops40h 15mDelta

Thu 9/1010:25SYD - SEA

2 stops24h 33mDelta

Deal found 14/7$1,274

Thu 28/818:05SEA - OOL

2 stops35h 00mMultiple Airlines

Thu 4/914:25OOL - SEA

2 stops25h 18mMultiple Airlines

Deal found 14/7$1,451

Tue 5/816:42SEA - AVV

2 stops24h 03mMultiple Airlines

Tue 19/814:55AVV - SEA

2 stops24h 10mMultiple Airlines

Deal found 15/7$1,460

Wed 27/813:20SEA - PER

2 stops36h 50mMultiple Airlines

Wed 3/921:55PER - SEA

2 stops27h 45mMultiple Airlines

Deal found 13/7$1,474

Mon 3/1118:30SEA - MEL

2 stops23h 50mQantas Airways

Mon 17/1114:05MEL - SEA

2 stops23h 39mQantas Airways

Deal found 13/7$1,509

Wed 10/916:59SEA - HBA

2 stops32h 51mMultiple Airlines

Wed 24/919:30HBA - SEA

2 stops34h 24mMultiple Airlines

Deal found 14/7$1,520

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 15 July 2025.

Tue 19/817:55SEA - SYD

1 stop20h 10mQantas Airways

Fri 29/809:10SYD - SEA

1 stop29h 23mQantas Airways

Deal found 12/7$1,177

Sun 7/914:55SEA - SYD

1 stop23h 25mAir Canada

Tue 16/909:20SYD - SEA

1 stop17h 01mAir Canada

Deal found 12/7$1,201

Thu 28/815:43SEA - SYD

1 stop22h 12mAmerican Airlines

Wed 10/909:10SYD - SEA

1 stop29h 48mAmerican Airlines

Deal found 13/7$1,241

Tue 2/913:30SEA - SYD

2 stops24h 05mDelta

Tue 23/909:25SYD - SEA

2 stops22h 14mDelta

Deal found 12/7$1,258

Thu 14/819:34SEA - SYD

2 stops30h 41mANA

Tue 9/911:50SYD - SEA

2 stops23h 46mANA

Deal found 13/7$1,259

Wed 1/1016:59SEA - SYD

1 stop21h 06mMultiple Airlines

Sat 11/1018:45SYD - SEA

1 stop19h 22mMultiple Airlines

Deal found 14/7$1,261

Sat 2/812:49SEA - SYD

2 stops25h 11mUnited Airlines

Sat 16/810:20SYD - SEA

1 stop20h 13mUnited Airlines

Deal found 13/7$1,262

Sun 24/823:35SEA - BNE

1 stop41h 20mPhilippine Airlines

Sun 31/811:15BNE - SEA

1 stop25h 00mPhilippine Airlines

Deal found 13/7$1,521

Wed 19/1118:55SEA - BNE

2 stops41h 35mHawaiian Airlines

Sat 6/1216:50BNE - SEA

2 stops21h 25mHawaiian Airlines

Deal found 13/7$1,904

Wed 27/816:30SEA - PER

1 stop28h 25mQatar Airways

Wed 3/915:40PER - SEA

1 stop36h 05mQatar Airways

Deal found 13/7$1,939

Sat 1/1109:45SEA - CNS

1 stop38h 35mSingapore Airlines

Wed 5/1118:35CNS - SEA

1 stop30h 35mSingapore Airlines

Deal found 14/7$2,436

Wed 27/817:14SEA - ADL

2 stops31h 46mAir New Zealand

Wed 3/906:00ADL - SEA

3 stops29h 06mAir New Zealand

Deal found 13/7$2,585

Last-minute flights from Seattle to Australia
Discover last-minute flight deals from Seattle to Australia. Data last updated 15 July 2025 and is based on user searches.

Sat 19/720:10SEA - SYD

1 stop41h 25mDelta

Sat 16/809:25SYD - SEA

2 stops24h 13mDelta

Deal found 12/7$2,136

Sat 19/708:15SEA - SYD

2 stops35h 20mMultiple Airlines

Fri 15/816:20SYD - SEA

1 stop30h 40mMultiple Airlines

Deal found 12/7$2,293

Sun 20/716:30SEA - SYD

1 stop23h 55mANA

Tue 19/820:55SYD - SEA

1 stop34h 30mANA

Deal found 13/7$2,392

Sun 20/723:35SEA - SYD

1 stop39h 25mPhilippine Airlines

Wed 20/810:10SYD - SEA

1 stop26h 05mPhilippine Airlines

Deal found 14/7$2,457

Mon 21/714:55SEA - SYD

2 stops26h 45mAir Canada

Mon 28/709:20SYD - SEA

1 stop26h 16mAir Canada

Deal found 13/7$1,837

Mon 21/716:30SEA - MEL

2 stops28h 05mANA

Thu 31/717:30MEL - SEA

2 stops37h 55mANA

Deal found 12/7$2,486

Tue 22/714:50SEA - PER

2 stops32h 50mUnited Airlines

Tue 29/723:45PER - SEA

2 stops28h 40mUnited Airlines

Deal found 14/7$2,268

Tue 22/717:59SEA - PER

2 stops57h 41mQatar Airways

Tue 29/722:45PER - SEA

1 stop29h 00mQatar Airways

Deal found 12/7$2,505

Wed 23/714:55SEA - BNE

1 stop23h 10mAir Canada

Wed 20/810:00BNE - SEA

1 stop16h 21mAir Canada

Deal found 13/7$2,281

Wed 23/713:45SEA - BNE

1 stop24h 20mMultiple Airlines

Thu 21/806:00BNE - SEA

2 stops29h 36mMultiple Airlines

Deal found 13/7$2,409

Thu 24/705:10SEA - SYD

1 stop32h 45mUnited Airlines

Tue 5/810:20SYD - SEA

1 stop20h 05mUnited Airlines

Deal found 12/7$1,296

Thu 24/711:20SEA - SYD

2 stops26h 45mAlaska Airlines

Tue 5/809:10SYD - SEA

2 stops22h 34mAlaska Airlines

Deal found 12/7$1,877

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 15 July 2025.

Tue 4/1118:30SEA - SYD

1 stop19h 30mQantas Airways

Deal found 14/7$550

Tue 12/820:40SEA - SYD

1 stop25h 00mMultiple Airlines

Deal found 13/7$596

Fri 8/814:32SEA - SYD

1 stop23h 58mAmerican Airlines

Deal found 12/7$599

Wed 13/812:49SEA - SYD

2 stops25h 11mUnited Airlines

Deal found 13/7$605

Thu 7/814:32SEA - AVV

2 stops39h 18mMultiple Airlines

Deal found 13/7$688

Wed 29/1016:30SEA - BNE

2 stops36h 30mMultiple Airlines

Deal found 14/7$710

Fri 5/917:59SEA - OOL

2 stops44h 21mMultiple Airlines

Deal found 14/7$741

Sun 9/1118:50SEA - MEL

2 stops26h 55mMultiple Airlines

Deal found 13/7$744

Wed 15/1007:05SEA - SYD

2 stops31h 00mAlaska Airlines

Deal found 14/7$750

Thu 28/817:59SEA - OOL

2 stops23h 41mQantas Airways

Deal found 14/7$755

Thu 28/818:05SEA - ADL

2 stops23h 45mMultiple Airlines

Deal found 14/7$758

Fri 26/917:59SEA - BNE

2 stops23h 41mQantas Airways

Deal found 13/7$759

Cheapflights Fare Finder

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

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 19/8

17:55-07:05

1 stop20h 10m

Sydney Kingsford Smith

Fri 29/8

09:10-21:33

1 stop29h 23m

$1,177

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 7/9

14:55-07:20

1 stop23h 25m

Sydney Kingsford Smith

Tue 16/9

09:20-09:21

1 stop17h 01m

$1,201

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 28/8

15:43-06:55

1 stop22h 12m

Sydney Kingsford Smith

Wed 10/9

09:10-21:58

1 stop29h 48m

$1,241

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 2/9

12:43-07:00

2 stops25h 17m

Sydney Kingsford Smith

Thu 25/9

10:20-16:24

1 stop23h 04m

$1,258

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 14/8

19:34-19:15

2 stops30h 41m

Sydney Kingsford Smith

Tue 9/9

11:50-18:36

2 stops23h 46m

$1,259

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 1/10

16:59-07:05

1 stop21h 06m

Sydney Kingsford Smith

Sat 11/10

18:45-20:07

1 stop19h 22m

$1,261

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Fri 26/9

21:20-06:35

2 stops40h 15m

Sydney Kingsford Smith

Wed 8/10

10:25-18:30

2 stops26h 05m

$1,274

SeattleCoolangatta

SEA - OOL

SEAOOL

Seattle/Tacoma Intl

Thu 28/8

18:05-22:05

2 stops35h 00m

Coolangatta Gold Coast

Thu 4/9

14:25-22:43

2 stops25h 18m

$1,451

SeattleMelbourne

SEA - AVV

SEAAVV

Seattle/Tacoma Intl

Tue 5/8

16:42-09:45

2 stops24h 03m

Melbourne Avalon

Tue 19/8

14:55-22:05

2 stops24h 10m

$1,460

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Wed 27/8

13:20-17:10

2 stops36h 50m

Perth

Wed 3/9

21:55-10:40

2 stops27h 45m

$1,474

Flights are sorted by cheapest return flights first.

Deals found on 14/7

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 EVA Air, ANA, andJapan Airlines 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.

EVA Air

8.4

Very Good

1,214 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

EVA Air

8.4

Very Good

1,214 reviews

EVA Air

8.4

Very Good

1,214 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

ANA

8.4

Very Good

902 reviews

EVA Air

8.4

Very Good

1,214 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Japan Airlines

8.3

Very Good

1,513 reviews

EVA Air

8.4

Very Good

1,214 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Asiana Airlines

8.2

Very Good

455 reviews

EVA Air

8.4

Very Good

1,214 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Emirates

8.1

Very Good

3,285 reviews

EVA Air

8.4

Very Good

1,214 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

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.
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 $550. American Airlines flights start at $599 while deals on United Airlines start at $605 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, 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
Air Canada	Cheapest$1,269	Average$1,772	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	Cheapest$1,536	Average$2,004	FlexibilityNo cancel fee	On-time69%	Search United Airlines 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 $550

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 4/11. 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 15 July 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 15 July 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 15 July 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 15 July 2025.

Reviews of airlines servicing Australia

Read reviews from past customers who have flown with EVA Air, ANA, andJapan Airlines 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?

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

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 15 July 2025.