What is the cheapest airline that flies from Seattle/Tacoma Intl to Australia?

Air Canada, Philippine Airlines, and United Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Australia

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Australia?

Prices for flights from Seattle/Tacoma Intl Airport to Australia were last updated today.

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Australia?

There are 2 operators available for flights from Seattle/Tacoma Intl Airport to Australia as of January 2026.

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Australia?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Australia.

What documentation or ID do you need to fly to Australia?

The necessary travel and health documents for your Australia trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$607 Cheap Flights from Seattle to Australia in 2026

1 adult

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Seattle to Australia

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

20:00 - 08:45

SEA

BNE

18h 45m1 stop

10:45 - 19:16

BNE

SEA

26h 31m1 stop

$1,189Air Canada

Mon, 23 Feb - Mon, 2 Mar

20:00 - 08:45

SEA

BNE

18h 45m1 stop

10:45 - 21:06

BNE

SEA

28h 21m1 stop

$1,193Air Canada

Sun, 8 Feb - Sun, 8 Mar

15:40 - 14:20

SEA

BNE

28h 40m2 stops

10:45 - 09:31

BNE

SEA

16h 46m1 stop

$1,219Multiple Airlines

Thu, 19 Feb - Wed, 4 Mar

15:40 - 07:05

SEA

BNE

22h 25m1 stop

20:15 - 09:33

BNE

SEA

30h 18m2 stops

$1,220Multiple Airlines

Tue, 31 Mar - Tue, 7 Apr

20:00 - 07:05

SEA

BNE

18h 05m1 stop

10:00 - 15:03

BNE

SEA

22h 03m1 stop

$1,250Air New Zealand

Tue, 31 Mar - Wed, 15 Apr

06:09 - 22:45

SEA

MEL

45h 36m2 stops

12:00 - 18:57

MEL

SEA

25h 57m1 stop

$1,455Qantas Airways

Sat, 21 Feb - Sat, 7 Mar

06:09 - 22:45

SEA

MEL

45h 36m2 stops

12:00 - 13:59

MEL

SEA

20h 59m1 stop

$1,480Qantas Airways

Sat, 21 Feb - Thu, 5 Mar

17:20 - 08:30

SEA

ADL

21h 40m1 stop

13:55 - 23:28

ADL

SEA

27h 03m1 stop

$1,669United Airlines

Mon, 9 Mar - Mon, 23 Mar

08:30 - 12:15

SEA

OOL

33h 45m3 stops

10:55 - 22:13

OOL

SEA

29h 18m2 stops

$1,992Air New Zealand

Mon, 23 Feb - Mon, 2 Mar

19:30 - 21:10

SEA

HBA

30h 40m2 stops

06:25 - 12:24

HBA

SEA

22h 59m2 stops

$2,158United Airlines

Mon, 9 Feb - Tue, 30 Jun

Fiji Airways flights from Seattle to Australia

Our best Fiji Airways deals on Seattle to Australia flight tickets

Fiji Airways

28 Jan

SEA17:59Seattle/Tacoma Intl

23h 26m

2 stops

MEL12:25Melbourne

4 Feb

MEL13:45Melbourne

21h 57m

2 stops

SEA16:42Seattle/Tacoma Intl

$1,566

Fiji Airways

4 Feb

SEA17:59Seattle/Tacoma Intl

33h 06m

2 stops

SYD22:05Sydney Kingsford Smith

11 Feb

SYD14:00Sydney Kingsford Smith

21h 42m

2 stops

SEA16:42Seattle/Tacoma Intl

$1,660

Qantas Airways flights from Seattle to Australia

Our best Qantas Airways deals on Seattle to Australia flight tickets

Qantas Airways

27 Jan

SEA06:00Seattle/Tacoma Intl

55h 30m

2 stops

BNE07:30Brisbane

3 Feb

BNE19:40Brisbane

19h 12m

1 stop

SEA20:52Seattle/Tacoma Intl

$1,403

Qantas Airways

21 Feb

SEA06:09Seattle/Tacoma Intl

45h 36m

2 stops

MEL22:45Melbourne

7 Mar

MEL12:00Melbourne

25h 57m

1 stop

SEA18:57Seattle/Tacoma Intl

$1,455

Qantas Airways

21 Feb

SEA06:09Seattle/Tacoma Intl

45h 36m

2 stops

MEL22:45Melbourne

5 Mar

MEL12:00Melbourne

20h 59m

1 stop

SEA13:59Seattle/Tacoma Intl

$1,480

Fly from

Fly to

Route

Depart

Return

Price

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Mon 23/2

20:00-08:45

1 stop18h 45m

Brisbane

Mon 2/3

10:45-19:16

1 stop26h 31m

$1,189

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Sun 8/2

20:00-08:45

1 stop18h 45m

Brisbane

Sun 8/3

10:45-21:06

1 stop28h 21m

$1,193

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Thu 19/2

15:40-14:20

2 stops28h 40m

Brisbane

Wed 4/3

10:45-09:31

1 stop16h 46m

$1,219

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 31/3

15:40-07:05

1 stop22h 25m

Brisbane

Tue 7/4

20:15-09:33

2 stops30h 18m

$1,220

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 31/3

20:00-07:05

1 stop18h 05m

Brisbane

Wed 15/4

10:00-15:03

1 stop22h 03m

$1,250

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sat 21/2

06:09-22:45

2 stops45h 36m

Melbourne

Sat 7/3

12:00-18:57

1 stop25h 57m

$1,455

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sat 21/2

06:09-22:45

2 stops45h 36m

Melbourne

Thu 5/3

12:00-13:59

1 stop20h 59m

$1,480

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 9/3

17:20-08:30

1 stop21h 40m

Adelaide

Mon 23/3

13:55-23:28

1 stop27h 03m

$1,669

SeattleCoolangatta

SEA - OOL

SEAOOL

Seattle/Tacoma Intl

Mon 23/2

08:30-12:15

3 stops33h 45m

Coolangatta Gold Coast

Mon 2/3

10:55-22:13

2 stops29h 18m

$1,992

SeattleHobart

SEA - HBA

SEAHBA

Seattle/Tacoma Intl

Mon 9/2

19:30-21:10

2 stops30h 40m

Hobart

Tue 30/6

06:25-12:24

2 stops22h 59m

$2,158

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Seattle to Australia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Australia?

In general, August is the cheapest month to fly from Seattle to Australia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,265. If you don’t want to visit Australia in August, then you should wait until September to fly from Seattle, when ticket prices are also cheap, with an average price of $1,286.

How far in advance should I book a flight to Australia?

You are more likely to see cheaper flights to Australia from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Australia for around $1,579 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Australia from Seattle for as low as $1,310 on momondo.

Can stopping save me money on Seattle to Australia flights?

You could potentially save up to 11% on your flight if you consider stops on a Seattle to Australia flight.

Cheap Seattle to Australia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Australia

Fastest flight time	18h 45m
Direct flights	None

The fastest flight from Seattle to Australia takes 18h 45m

There are no direct flights from Seattle to Australia. There are no popular flight routes from Seattle to Australia.

Search flight deals

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Australia?
Prices for flights from Seattle/Tacoma Intl Airport to Australia were last updated today.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Australia?
There are 2 operators available for flights from Seattle/Tacoma Intl Airport to Australia as of January 2026.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Australia?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Australia.
What documentation or ID do you need to fly to Australia?
The necessary travel and health documents for your Australia trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Seattle to Australia

Compare and see reviews for airlines that fly from Seattle to Australia with momondo

Airline	Rating	Free cancellation	Price
United Airlines	PriceFrom $1,194	Free cancellation	Rating 7.4 9,146 reviews		Search United Airlines flights
Air Canada	PriceFrom $1,257	Free cancellation	Rating 7.1 10,607 reviews		Search Air Canada flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Australia?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Australia for you.

Can I find flights from Seattle to Australia with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Seattle to Australia flights to just show those with flexible booking policies.

How can momondo help me find flights from Seattle to Australia?

Once all potential Seattle to Australia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Seattle to Australia right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seattle to Australia now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Australia and let you know when they change.