How long is the flight from Seattle to Australia?

Air Canada, Delta, and United Airlines can get you from Seattle to Australia in just under 22h. Your travel time can differ by up to 8h 05m. 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 $563. Air Canada flights start at $604 while deals on Qantas Airways start at $639 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 - Perth 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.

$103+ 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 17 September 2026.

Sun 18/1010:50 -

1 stop27h 30m

Sun 1/1111:20 -

1 stop26h 02m

Deal found 15/9$1,171

Sun 18/1019:15 -

1 stop19h 05m

Sun 1/1108:00 -

2 stops20h 32m

Deal found 15/9$1,190

Mon 19/1019:15 -

1 stop19h 05m

Sat 31/1010:20 -

1 stop26h 02m

Deal found 14/9$1,236

Wed 11/1110:10 -

1 stop28h 25m

Mon 30/1111:20 -

1 stop26h 02m

Deal found 14/9$1,265

Wed 21/1019:15 -

1 stop19h 05m

Mon 26/1006:20 -

2 stops21h 07m

Deal found 15/9$1,279

Mon 19/1019:15 -

1 stop19h 05m

Mon 26/1006:20 -

2 stops21h 07m

Deal found 14/9$1,281

Sun 8/1119:05 -

1 stop19h 40m

Sun 22/1110:45 -

1 stop16h 47m

Deal found 14/9$1,320

Sat 24/1015:00 -

1 stop23h 45m

Sat 31/1009:45 -

1 stop25h 37m

Deal found 12/9$1,329

Sun 8/1110:10 -

1 stop28h 35m

Sun 22/1106:05 -

2 stops21h 27m

Deal found 14/9$1,350

Fri 13/1110:10 -

1 stop28h 35m

Tue 17/1110:45 -

1 stop25h 37m

Deal found 13/9$1,379

Fri 13/1115:15 -

1 stop23h 30m

Tue 17/1106:05 -

2 stops21h 27m

Deal found 16/9$1,406

Sun 18/1019:55 -

1 stop18h 10m

Sun 1/1110:45 -

1 stop16h 47m

Deal found 15/9$1,421

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 17 September 2026.

Sat 24/1015:00 -

1 stop23h 45m

Sat 31/1009:45 -

1 stop25h 37m

Deal found 14/9$1,340

Wed 10/219:05 -

2 stops26h 25m

Sun 14/206:05 -

2 stops21h 27m

Deal found 16/9$1,386

Sun 7/205:45 -

2 stops30h 05m

Wed 17/210:40 -

1 stop18h 55m

Deal found 15/9$1,496

Sun 28/217:30 -

1 stop22h 00m

Tue 16/311:45 -

1 stop18h 27m

Deal found 13/9$1,555

Tue 27/1016:37 -

2 stops28h 28m

Tue 3/1106:00 -

2 stops25h 00m

Deal found 12/9$1,607

Wed 3/310:25 -

1 stop31h 05m

Sun 14/300:45 -

1 stop27h 00m

Deal found 13/9$1,809

Fri 12/208:40 -

1 stop38h 10m

Sun 21/210:15 -

1 stop63h 20m

Deal found 16/9$2,312

Sun 14/215:50 -

2 stops34h 20m

Sat 20/222:00 -

1 stop32h 10m

Deal found 15/9$2,334

Sat 31/1017:44 -

2 stops33h 46m

Tue 3/1110:25 -

2 stops43h 47m

Deal found 15/9$2,407

Mon 5/1016:35 -

2 stops34h 10m

Thu 29/1017:10 -

3 stops40h 02m

Deal found 14/9$2,788

Sun 18/1019:55 -

1 stop18h 10m

Sun 1/1110:45 -

1 stop16h 47m

Deal found 15/9$1,421

Fri 5/211:25 -

2 stops27h 05m

Fri 19/210:40 -

1 stop20h 20m

Deal found 13/9$1,573

Fri 5/207:03 -

2 stops30h 27m

Mon 22/211:20 -

1 stop18h 52m

Deal found 13/9$1,577

Sun 25/1010:10 -

1 stop28h 35m

Thu 29/1009:45 -

1 stop21h 52m

Deal found 13/9$1,677

Mon 19/1019:15 -

2 stops24h 55m

Tue 3/1106:00 -

2 stops27h 37m

Deal found 16/9$1,570

Mon 2/1112:45 -

2 stops25h 45m

Mon 16/1108:00 -

2 stops22h 14m

Deal found 12/9$1,581

Sat 6/305:45 -

2 stops31h 15m

Sat 20/309:10 -

1 stop19h 25m

Deal found 16/9$1,597

Thu 22/1006:10 -

2 stops49h 30m

Sun 22/1108:30 -

1 stop40h 15m

Deal found 12/9$1,900

Sun 22/1110:40 -

1 stop28h 50m

Thu 3/1212:45 -

1 stop22h 37m

Deal found 11/9$1,626

Thu 5/1114:35 -

2 stops46h 00m

Sat 21/1111:10 -

3 stops43h 37m

Deal found 14/9$3,967

Tue 27/1019:05 -

2 stops25h 30m

Tue 3/1106:10 -

2 stops30h 42m

Deal found 12/9$1,642

Thu 3/1217:40 -

2 stops44h 50m

Fri 19/210:40 -

2 stops24h 13m

Deal found 13/9$1,713

Fri 12/210:03 -

2 stops29h 57m

Sun 21/212:00 -

1 stop39h 15m

Deal found 15/9$1,963

Sun 11/1018:05 -

2 stops45h 10m

Thu 22/1011:55 -

2 stops23h 42m

Deal found 11/9$1,632

Fri 12/219:05 -

2 stops32h 10m

Sun 21/206:10 -

2 stops21h 52m

Deal found 16/9$1,689

Thu 11/219:35 -

2 stops42h 55m

Fri 19/210:40 -

1 stop17h 55m

Deal found 13/9$1,719

Sat 31/1009:40 -

1 stop23h 25m

Tue 3/1106:40 -

1 stop40h 25m

Deal found 14/9$2,348

Thu 4/218:45 -

2 stops41h 10m

Sun 14/216:20 -

2 stops43h 30m

Deal found 15/9$4,712

Sat 31/1017:44 -

2 stops25h 46m

Wed 4/1112:50 -

2 stops42h 52m

Deal found 16/9$2,418

Tue 27/1009:56 -

2 stops29h 59m

Mon 23/1108:30 -

2 stops38h 37m

Deal found 12/9$2,005

Find flight deals from Seattle to Australia

Round-trip from	$1,171
One-way from	$103
Popular in	December
Cheapest in	August
Average price	$1,461

Air Canada
18/10-1/11
2 total stops
53h 32m total
Seattle to Australia

Search Deals

Qantas Airways
19/12-31/12
1 total stop
24h 59m total
Seattle to Australia

Search Deals

Highest demand for flights based on searches. 17% potential increase in price ($473 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($114 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

12:45-09:05

2 stops25h 20m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$770

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 18/11

12:45-09:05

2 stops25h 20m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$770

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Mon 18/1

19:59-08:30

1 stop41h 31m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$789

SeattlePerth

SEA Seattle/Tacoma Intl - PER Perth

SEAPER

Seattle/Tacoma Intl

Thu 1/10

07:15-08:55

3 stops34h 40m

Perth

Wed 31/12

00:00-08:00

Nonstop0h 00m

$796

SeattleMelbourne

SEA Seattle/Tacoma Intl - MEL Melbourne

SEAMEL

Seattle/Tacoma Intl

Mon 7/12

15:20-10:30

1 stop24h 10m

Melbourne

Wed 31/12

00:00-06:00

Nonstop0h 00m

$801

SeattleMelbourne

SEA Seattle/Tacoma Intl - MEL Melbourne

SEAMEL

Seattle/Tacoma Intl

Sun 7/2

17:30-10:30

1 stop22h 00m

Melbourne

Wed 31/12

00:00-06:00

Nonstop0h 00m

$801

SeattleMelbourne

SEA Seattle/Tacoma Intl - MEL Melbourne

SEAMEL

Seattle/Tacoma Intl

Mon 8/2

07:00-09:30

2 stops31h 30m

Melbourne

Wed 31/12

00:00-06:00

Nonstop0h 00m

$801

SeattleBrisbane

SEA Seattle/Tacoma Intl - BNE Brisbane

SEABNE

Seattle/Tacoma Intl

Wed 20/1

09:30-08:30

1 stop29h 00m

Brisbane

Wed 31/12

00:00-06:00

Nonstop0h 00m

$817

Fastest return journey

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Thu 21/1

17:55-08:30

1 stop19h 35m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$854

SeattleBrisbane

SEA Seattle/Tacoma Intl - BNE Brisbane

SEABNE

Seattle/Tacoma Intl

Sat 5/12

11:13-05:50

2 stops24h 37m

Brisbane

Wed 31/12

00:00-06:00

Nonstop0h 00m

$879

Flights are sorted by cheapest return flights first.

Deals found on 16/9

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-BNE

SEA-MEL

SEA-OOL

SEA-ADL

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-BNE

SEA-MEL

SEA-OOL

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 $1,432). Flying from Seattle to Australia in December is currently the most expensive (average of $2,365). 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

10,214 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Asha,Sept 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.

United Airlines

7.4

Good

10,214 reviews

United Airlines

7.4

Good

10,214 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Asha,Sept 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.

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?
Air Canada, Delta, and United Airlines can get you from Seattle to Australia in just under 22h. Your travel time can differ by up to 8h 05m. 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 $563. Air Canada flights start at $604 while deals on Qantas Airways start at $639 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 - Perth 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 $1,432). Flying from Seattle to Australia in December is currently the most expensive (average of $2,365). 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$1,421	Average$1,535	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.

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Cheap flights from Seattle to Australia from $103

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 19/12. 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 17 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 17 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 17 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 17 September 2026.

Last-minute flights from Seattle to AustraliaDiscover last-minute flight deals from Seattle to Australia. Data last updated 17 September 2026 and is based on user searches.

Discover last-minute flight deals from Seattle to Australia. Data last updated 17 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 17 September 2026.

Search for one-way flight options from Seattle to Australia. Find affordable one-way fares based on user searches. Data last updated 17 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 17 September 2026.

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Top airline flying from Seattle to Australia

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How does Cheapflights help users find flights from Seattle to Australia?

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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 17 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 17 September 2026.

Last-minute flights from Seattle to Australia
Discover last-minute flight deals from Seattle to Australia. Data last updated 17 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 17 September 2026.