How long is the flight from Seattle to Australia?

United Airlines, Delta, and Air Canada can get you from Seattle to Australia in just under 25h 20m. Your travel time can differ by up to 6h 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 United Airlines, which is currently one of the cheapest options available, starting at $557. Air Canada flights start at $597 while deals on Qantas Airways start at $632 one-way.

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.

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).

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 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.

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.

$655+ Cheap Flights from Seattle to Australia

Cheap flight deals from Seattle to Australia

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

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 5 September 2026.

Sun 6/919:20 -

1 stop19h 00m

Sun 20/909:20 -

1 stop26h 12m

Deal found 3/9$1,213

Sat 24/1020:00 -

1 stop40h 25m

Wed 11/1114:00 -

2 stops23h 54m

Deal found 3/9$1,216

Sat 24/1020:00 -

1 stop40h 25m

Fri 13/1114:55 -

2 stops22h 59m

Deal found 3/9$1,217

Sat 24/1020:00 -

1 stop40h 25m

Mon 9/1114:00 -

2 stops23h 54m

Deal found 3/9$1,219

Wed 28/1020:09 -

1 stop40h 16m

Fri 13/1114:55 -

2 stops22h 59m

Deal found 3/9$1,220

Thu 29/1020:09 -

1 stop40h 16m

Mon 9/1114:00 -

2 stops23h 54m

Deal found 3/9$1,221

Sun 6/919:20 -

2 stops23h 20m

Sun 20/909:20 -

1 stop26h 12m

Deal found 3/9$1,234

Sun 25/1010:10 -

1 stop28h 25m

Sun 1/1111:20 -

1 stop26h 02m

Deal found 3/9$1,249

Sun 18/1019:15 -

1 stop19h 05m

Sun 25/1010:20 -

1 stop16h 57m

Deal found 31/8$1,250

Sat 24/1020:00 -

1 stop40h 25m

Tue 10/1114:00 -

2 stops23h 54m

Deal found 3/9$1,252

Sun 18/1010:50 -

1 stop27h 30m

Sun 1/1111:20 -

1 stop26h 02m

Deal found 4/9$1,253

Wed 28/1020:09 -

1 stop40h 16m

Thu 12/1114:00 -

2 stops23h 54m

Deal found 3/9$1,255

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 5 September 2026.

Wed 2/1215:30 -

1 stop22h 50m

Mon 21/1213:20 -

1 stop26h 20m

Deal found 31/8$1,516

Mon 12/1013:30 -

2 stops25h 20m

Mon 26/1009:10 -

2 stops32h 49m

Deal found 3/9$1,535

Mon 19/1019:15 -

2 stops24h 55m

Thu 26/1106:00 -

2 stops22h 32m

Deal found 1/9$1,613

Thu 17/910:50 -

2 stops31h 40m

Wed 30/910:00 -

1 stop21h 17m

Deal found 4/9$1,646

Sat 31/1011:50 -

1 stop41h 15m

Tue 3/1100:45 -

1 stop27h 00m

Deal found 1/9$1,840

Sat 17/1016:37 -

2 stops29h 38m

Sat 24/1011:25 -

2 stops29h 12m

Deal found 1/9$1,896

Sat 31/1016:50 -

1 stop29h 35m

Wed 4/1122:00 -

1 stop32h 10m

Deal found 31/8$2,094

Sat 31/1009:40 -

1 stop35h 55m

Mon 2/1101:20 -

1 stop21h 45m

Deal found 1/9$2,230

Mon 19/1015:00 -

2 stops26h 05m

Mon 26/1006:00 -

3 stops29h 22m

Deal found 3/9$2,730

Mon 15/210:45 -

1 stop27h 35m

Mon 22/211:50 -

1 stop23h 04m

Deal found 2/9$1,516

Wed 14/1017:45 -

1 stop21h 05m

Wed 28/1009:10 -

2 stops30h 55m

Deal found 1/9$1,536

Mon 19/1007:00 -

2 stops22h 25m

Tue 24/1115:20 -

2 stops23h 00m

Deal found 1/9$1,614

Mon 19/1010:44 -

1 stop28h 31m

Tue 3/1112:45 -

2 stops24h 12m

Deal found 4/9$1,528

Wed 28/1009:42 -

2 stops27h 48m

Thu 19/1110:40 -

2 stops25h 18m

Deal found 2/9$1,547

Wed 14/1019:15 -

2 stops28h 55m

Wed 21/1006:00 -

2 stops29h 32m

Deal found 31/8$1,640

Tue 6/1019:25 -

1 stop18h 30m

Fri 16/1010:30 -

2 stops30h 29m

Deal found 1/9$1,592

Tue 1/1205:30 -

2 stops32h 00m

Thu 17/1210:40 -

1 stop23h 35m

Deal found 4/9$1,592

Mon 19/1016:37 -

2 stops35h 13m

Mon 26/1006:05 -

3 stops24h 11m

Deal found 4/9$1,954

Sat 31/1019:05 -

2 stops27h 45m

Wed 4/1106:10 -

2 stops30h 42m

Deal found 4/9$1,992

Thu 5/1119:05 -

2 stops24h 00m

Sat 14/1121:15 -

2 stops36h 22m

Deal found 31/8$1,658

Sun 1/1115:50 -

2 stops52h 35m

Thu 5/1106:20 -

2 stops48h 20m

Deal found 1/9$2,104

Wed 27/110:25 -

1 stop44h 30m

Fri 19/208:30 -

1 stop40h 15m

Deal found 5/9$2,119

Sat 21/1115:35 -

1 stop23h 55m

Wed 2/1211:30 -

2 stops28h 51m

Deal found 31/8$1,606

Fri 4/1212:31 -

1 stop24h 59m

Sat 19/1210:40 -

1 stop27h 10m

Deal found 3/9$1,632

Fri 12/219:05 -

2 stops32h 10m

Sun 21/206:10 -

2 stops21h 47m

Deal found 5/9$1,670

Sun 18/1016:25 -

2 stops46h 10m

Sun 25/1022:00 -

1 stop32h 10m

Deal found 3/9$2,109

Sat 2/113:18 -

2 stops30h 12m

Wed 20/111:20 -

1 stop24h 47m

Deal found 30/8$1,656

Mon 1/219:05 -

2 stops28h 10m

Mon 15/206:00 -

2 stops21h 27m

Deal found 1/9$1,670

Mon 28/917:02 -

2 stops24h 43m

Mon 5/1018:05 -

3 stops36h 11m

Deal found 31/8$2,243

Tue 26/115:50 -

1 stop34h 55m

Sat 13/222:45 -

2 stops38h 20m

Deal found 5/9$2,140

Find flight deals from Seattle to Australia

Round-trip from	$1,216
One-way from	$655
Popular in	December
Cheapest in	August
Average price	$1,434

24/10-11/11
3 total stops
64h 19m total
Seattle to Australia

Search Deals

Philippine Airlines
25/2-31/12
1 total stop
41h 20m total
Seattle to Australia

Search Deals

Highest demand for flights based on searches. 16% potential increase in price ($432 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($102 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Tue 17/11

20:09-06:25

1 stop39h 16m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$687

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Mon 16/11

09:25-08:30

2 stops28h 05m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$761

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Mon 26/10

07:15-07:30

2 stops30h 15m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$761

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Tue 17/11

09:25-08:30

2 stops28h 05m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$761

SeattleMelbourne

SEA Seattle/Tacoma Intl - MEL Melbourne

SEAMEL

Seattle/Tacoma Intl

Wed 25/11

13:38-09:30

1 stop24h 52m

Melbourne

Wed 31/12

00:00-06:00

Nonstop0h 00m

$774

SeattleMelbourne

SEA Seattle/Tacoma Intl - AVV Melbourne Avalon

SEAAVV

Seattle/Tacoma Intl

Wed 18/11

20:09-09:45

2 stops42h 36m

Melbourne Avalon

Wed 31/12

00:00-06:00

Nonstop0h 00m

$781

SeattleBrisbane

SEA Seattle/Tacoma Intl - BNE Brisbane

SEABNE

Seattle/Tacoma Intl

Fri 16/10

21:16-05:00

2 stops38h 44m

Brisbane

Wed 31/12

00:00-06:00

Nonstop0h 00m

$788

SeattleMelbourne

SEA Seattle/Tacoma Intl - MEL Melbourne

SEAMEL

Seattle/Tacoma Intl

Sun 15/11

08:30-10:30

2 stops31h 00m

Melbourne

Wed 31/12

00:00-06:00

Nonstop0h 00m

$790

SeattleMelbourne

SEA Seattle/Tacoma Intl - MEL Melbourne

SEAMEL

Seattle/Tacoma Intl

Wed 18/11

12:45-09:30

2 stops25h 45m

Melbourne

Wed 31/12

00:00-06:00

Nonstop0h 00m

$790

SeattleMelbourne

SEA Seattle/Tacoma Intl - MEL Melbourne

SEAMEL

Seattle/Tacoma Intl

Tue 29/9

08:30-08:15

2 stops30h 45m

Melbourne

Wed 31/12

00:00-06:00

Nonstop0h 00m

$790

Flights are sorted by cheapest return flights first.

Deals found on 31/8

Showing 1-10 of 60 resultsSorted by cheapest first

...

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.

SEA-SYD

SEA-MEL

SEA-BNE

SEA-PER

SEA-AVV

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

SEA-AU0

SEA-SYD

SEA-MEL

SEA-BNE

SEA-PER

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 $1,402). Flying from Seattle to Australia in December is currently the most expensive (average of $2,338). 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 23 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

Read reviews from past customers who have flown with United 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.

United Airlines

7.4

Good

10,169 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!

United Airlines

7.4

Good

10,169 reviews

United Airlines

7.4

Good

10,169 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

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?
United Airlines, Delta, and Air Canada can get you from Seattle to Australia in just under 25h 20m. Your travel time can differ by up to 6h 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 United Airlines, which is currently one of the cheapest options available, starting at $557. Air Canada flights start at $597 while deals on Qantas Airways start at $632 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, February is the cheapest month in which you can book a flight from Seattle to Australia (average of $1,402). Flying from Seattle to Australia in December is currently the most expensive (average of $2,338). 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.

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Top airline flying from Seattle to Australia

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$1,404	Average$1,517	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

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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?

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Cheap flights from Seattle to Australia from $655

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 25/2. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap 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 5 September 2026.

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 5 September 2026.

Best flights from Seattle to AustraliaDiscover 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 5 September 2026.

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 5 September 2026.

Last-minute flights from Seattle to AustraliaDiscover last-minute flight deals from Seattle to Australia. Data last updated 5 September 2026 and is based on user searches.

Discover last-minute flight deals from Seattle to Australia. Data last updated 5 September 2026 and is based on user searches.

One-way flights from Seattle to AustraliaSearch for one-way flight options from Seattle to Australia. Find affordable one-way fares based on user searches. Data last updated 5 September 2026.

Search for one-way flight options from Seattle to Australia. Find affordable one-way fares based on user searches. Data last updated 5 September 2026.

Find flight deals from Seattle to Australia

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One-way from

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Cheapest in

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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

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

How far ahead should I book a flight from Seattle to Australia?

Booking 23 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

Read reviews from past customers who have flown with United 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

What airport do you fly from for flights from Seattle to Australia?

How long is the flight 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.

Complete your trip

Complete your trip to Australia by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to

Book a non-stop flight to one of these other cities located in .

Search flights from Seattle to Australia by cabin class

Find flights from Seattle to Australia, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Seattle and Australia flights

Browse other Seattle and Australia flight options. Last updated on 5 September 2026.

Popular flight searches

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Fly to Australia regions

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Top airline flying from Seattle to Australia

Fly with Cheapflights

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 5 September 2026.

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 5 September 2026.

Last-minute flights from Seattle to Australia
Discover last-minute flight deals from Seattle to Australia. Data last updated 5 September 2026 and is based on user searches.

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 5 September 2026.