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

Air Canada is the most popular carrier operating from Seattle/Tacoma Intl to Australia

What airlines fly to Australia?

United Airlines, Air Canada and Qantas Airways are the top three most popular airlines that fly to Australia from Seattle according to our data. United Airlines is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Australia. Keep in mind that there are 10 different airlines that fly to Australia on a routine basis, so you have a few additional options to choose from.

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 are refreshed on a daily basis.

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

As of February 2026, there are 10 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Australia.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. 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 travel and health documents required for your trip to Australia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Australia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$371 Cheap Flights from Seattle to Australia in 2026

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Find the cheapest flights from Seattle to Australia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:10 am - 7:45 am

SEA

BNE

28h 35m

1 stop

10:00 am - 2:20 pm

BNE

SEA

21h 20m

1 stop

$800Air Canada

Tue, Mar 10 - Sun, May 10

8:00 pm - 7:05 am

SEA

BNE

18h 05m

1 stop

10:00 am - 9:33 am

BNE

SEA

16h 33m

1 stop

$803Air Canada

Tue, Mar 31 - Tue, Apr 7

8:00 pm - 8:45 am

SEA

BNE

18h 45m

1 stop

7:40 pm - 8:58 pm

BNE

SEA

18h 18m

1 stop

$808Multiple Airlines

Tue, Mar 3 - Tue, Mar 10

8:00 pm - 7:45 am

SEA

BNE

18h 45m

1 stop

8:40 pm - 9:15 am

BNE

SEA

29h 35m

2 stops

$819Multiple Airlines

Tue, Mar 10 - Sun, May 10

4:30 pm - 7:15 pm

SEA

SYD

33h 45m

1 stop

8:55 pm - 2:25 pm

SYD

SEA

34h 30m

1 stop

$923ANA

Mon, May 4 - Mon, May 18

4:30 pm - 7:15 pm

SEA

SYD

33h 45m

1 stop

8:55 pm - 9:06 pm

SYD

SEA

41h 11m

2 stops

$927ANA

Mon, May 4 - Mon, May 18

11:59 pm - 9:20 am

SEA

ADL

39h 51m

2 stops

2:15 pm - 4:14 pm

ADL

SEA

19h 29m

1 stop

$1,125United Airlines

Sun, Mar 8 - Wed, Mar 18

2:32 pm - 11:05 am

SEA

ADL

28h 03m

2 stops

8:05 pm - 9:35 pm

ADL

SEA

42h 00m

2 stops

$1,213Qantas Airways

Mon, Jul 6 - Fri, Jul 24

5:06 pm - 10:35 am

SEA

CNS

24h 29m

2 stops

1:55 pm - 9:59 pm

CNS

SEA

25h 04m

2 stops

$1,295Qantas Airways

Tue, May 12 - Tue, May 26

9:20 am - 12:10 pm

SEA

HBA

32h 50m

2 stops

6:20 am - 4:14 pm

HBA

SEA

27h 54m

2 stops

$1,498United Airlines

Sun, Mar 8 - Thu, Mar 12

ANA flights from Seattle to Australia

Our best ANA deals on Seattle to Australia flight tickets

ANA

May 4

SEA4:30 pmSeattle/Tacoma Intl

33h 45m

1 stop

SYD7:15 pmSydney Kingsford Smith

May 18

SYD8:55 pmSydney Kingsford Smith

34h 30m

1 stop

SEA2:25 pmSeattle/Tacoma Intl

$923

ANA

May 4

SEA4:30 pmSeattle/Tacoma Intl

33h 45m

1 stop

SYD7:15 pmSydney Kingsford Smith

May 18

SYD8:55 pmSydney Kingsford Smith

41h 11m

2 stops

SEA9:06 pmSeattle/Tacoma Intl

$927

ANA

May 30

SEA4:30 pmSeattle/Tacoma Intl

33h 45m

1 stop

SYD7:15 pmSydney Kingsford Smith

Jun 15

SYD8:55 pmSydney Kingsford Smith

34h 30m

1 stop

SEA2:25 pmSeattle/Tacoma Intl

$959

Air Canada flights from Seattle to Australia

Our best Air Canada deals on Seattle to Australia flight tickets

Air Canada

Mar 10

SEA10:10 amSeattle/Tacoma Intl

28h 35m

1 stop

BNE7:45 amBrisbane

May 10

BNE10:00 amBrisbane

21h 20m

1 stop

SEA2:20 pmSeattle/Tacoma Intl

$800

Air Canada

Mar 31

SEA8:00 pmSeattle/Tacoma Intl

18h 05m

1 stop

BNE7:05 amBrisbane

Apr 7

BNE10:00 amBrisbane

16h 33m

1 stop

SEA9:33 amSeattle/Tacoma Intl

$803

Air Canada

Mar 31

SEA10:20 amSeattle/Tacoma Intl

27h 45m

1 stop

BNE7:05 amBrisbane

Apr 7

BNE10:00 amBrisbane

16h 35m

1 stop

SEA9:35 amSeattle/Tacoma Intl

$804

Fly from

Fly to

Route

Depart

Return

Price

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 3/10

10:10 am-7:45 am

1 stop28h 35m

Brisbane

Sun 5/10

10:00 am-2:20 pm

1 stop21h 20m

$800

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 3/31

8:00 pm-7:05 am

1 stop18h 05m

Brisbane

Tue 4/7

10:00 am-9:33 am

1 stop16h 33m

$803

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 3/3

8:00 pm-8:45 am

1 stop18h 45m

Brisbane

Tue 3/10

7:40 pm-8:58 pm

1 stop18h 18m

$808

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 3/10

8:00 pm-7:45 am

1 stop18h 45m

Brisbane

Sun 5/10

8:40 pm-9:15 am

2 stops29h 35m

$819

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 5/4

4:30 pm-7:15 pm

1 stop33h 45m

Sydney Kingsford Smith

Mon 5/18

8:55 pm-2:25 pm

1 stop34h 30m

$923

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 5/4

4:30 pm-7:15 pm

1 stop33h 45m

Sydney Kingsford Smith

Mon 5/18

8:55 pm-9:06 pm

2 stops41h 11m

$927

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 3/8

11:59 pm-9:20 am

2 stops39h 51m

Adelaide

Wed 3/18

2:15 pm-4:14 pm

1 stop19h 29m

$1,125

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 7/6

2:32 pm-11:05 am

2 stops28h 03m

Adelaide

Fri 7/24

8:05 pm-9:35 pm

2 stops42h 00m

$1,213

SeattleCairns

SEA - CNS

SEACNS

Seattle/Tacoma Intl

Tue 5/12

5:06 pm-10:35 am

2 stops24h 29m

Cairns

Tue 5/26

1:55 pm-9:59 pm

2 stops25h 04m

$1,295

SeattleHobart

SEA - HBA

SEAHBA

Seattle/Tacoma Intl

Sun 3/8

9:20 am-12:10 pm

2 stops32h 50m

Hobart

Thu 3/12

6:20 am-4:14 pm

2 stops27h 54m

$1,498

Flights are sorted by cheapest round-trip 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?

The month of August is, on average, the cheapest month to fly to Australia from Seattle, with most prices found around $845. If you aren’t able to travel during the month of August, then book flights to Australia from Seattle during February instead. Flights to Australia in February, while not as cheap as those in August, still average around $847.

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 $1,054 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Australia from Seattle for as low as $876 on momondo.

Can stopping save me money on Seattle to Australia flights?

You could potentially save up to 14% 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 05m
Direct flights	None

The fastest flight from Seattle to Australia takes 18h 05m

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 are refreshed on a daily basis.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Australia?
As of February 2026, there are 10 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Australia.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Australia?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. 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 travel and health documents required for your trip to Australia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Australia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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
Alaska Airlines	PriceFrom $97	Free Cancellation	Rating 8.0 11,884 reviews	Search Alaska Airlines flights
ANA	PriceFrom $583	Free Cancellation	Rating 8.4 1,092 reviews	Search ANA flights
Qantas Airways	PriceFrom $647	Free Cancellation	Rating 7.5 989 reviews	Search Qantas Airways flights
Air Canada	PriceFrom $779	Free Cancellation	Rating 7.1 10,717 reviews	Search Air Canada flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.2 11,296 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $812	Free Cancellation	Rating 7.8 2,833 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $821	Free Cancellation	Rating 7.4 9,295 reviews	Search United Airlines flights
Delta	PriceFrom $842	Free Cancellation	Rating 7.9 8,201 reviews	Search Delta flights
Singapore Airlines	PriceFrom $1,251	Free Cancellation	Rating 8.2 1,453 reviews	Search Singapore Airlines flights
Qatar Airways	PriceFrom $1,325	Free Cancellation	Rating 7.4 3,735 reviews	Search Qatar Airways flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Australia. Millions of users trust and use momondo every year so you are in good hands.

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

All flight searches from Seattle to Australia on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Seattle and Australia by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are simply researching potential flights to Australia, momondo offers a useful price alert feature which will track prices for flights to Australia from Seattle and alert you when they change.