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 42% of people opting to fly with this airline when traveling to Australia. Keep in mind that there are 11 different airlines that fly to Australia on a routine basis, so you have a few additional options to choose from.

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

Philippine Airlines, Air Canada, and Qantas Airways 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 are refreshed on a daily basis.

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

As of January 2026, there are 11 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.

$391 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.

5:45 am - 8:45 am

SEA

BNE

33h 00m

1 stop

10:45 am - 7:16 pm

BNE

SEA

26h 31m

1 stop

$797Air Canada

Thu, Feb 26 - Thu, Mar 5

9:55 am - 8:45 am

SEA

BNE

28h 50m

1 stop

10:45 am - 2:31 pm

BNE

SEA

21h 46m

1 stop

$798Air Canada

Sun, Feb 8 - Sun, Feb 15

3:40 pm - 8:45 am

SEA

BNE

23h 05m

1 stop

10:45 am - 10:06 pm

BNE

SEA

29h 21m

1 stop

$801Air Canada

Thu, Feb 19 - Wed, Mar 4

3:40 pm - 2:20 pm

SEA

BNE

28h 40m

2 stops

10:45 am - 7:16 pm

BNE

SEA

26h 31m

1 stop

$814Multiple Airlines

Thu, Feb 19 - Wed, Mar 4

3:40 pm - 8:45 am

SEA

BNE

23h 05m

1 stop

6:10 am - 9:31 am

BNE

SEA

21h 21m

2 stops

$818Multiple Airlines

Fri, Feb 27 - Fri, Mar 6

3:57 pm - 9:30 am

SEA

MEL

22h 33m

1 stop

6:45 am - 6:58 pm

MEL

SEA

31h 13m

2 stops

$892Qantas Airways

Wed, Feb 11 - Wed, Feb 18

5:50 pm - 5:40 pm

SEA

SYD

28h 50m

2 stops

11:20 am - 8:58 pm

SYD

SEA

27h 38m

1 stop

$1,066Qantas Airways

Tue, Mar 3 - Tue, Mar 17

5:10 pm - 9:30 am

SEA

ADL

21h 50m

1 stop

2:55 pm - 12:59 am

ADL

SEA

28h 34m

1 stop

$1,115United Airlines

Mon, Feb 9 - Mon, Feb 16

12:25 pm - 9:30 am

SEA

ADL

26h 35m

2 stops

2:55 pm - 10:59 pm

ADL

SEA

26h 34m

2 stops

$1,119United Airlines

Mon, Feb 9 - Mon, Feb 16

10:15 am - 5:10 am

SEA

PER

27h 55m

1 stop

1:10 am - 8:45 am

PER

SEA

22h 35m

1 stop

$1,128Singapore Airlines

Tue, Apr 7 - Mon, Apr 27

Hawaiian Airlines flights from Seattle to Australia

Our best Hawaiian Airlines deals on Seattle to Australia flight tickets

Hawaiian Airlines

Feb 4

SEA7:00 amSeattle/Tacoma Intl

17h 45m

1 stop

SYD7:45 pmSydney Kingsford Smith

Feb 14

SYD9:40 pmSydney Kingsford Smith

17h 46m

1 stop

SEA8:26 pmSeattle/Tacoma Intl

$1,119

Hawaiian Airlines

Feb 27

SEA7:00 amSeattle/Tacoma Intl

17h 45m

1 stop

SYD7:45 pmSydney Kingsford Smith

Mar 6

SYD9:40 pmSydney Kingsford Smith

17h 46m

1 stop

SEA8:26 pmSeattle/Tacoma Intl

$1,129

Hawaiian Airlines

Jan 20

SEA7:00 amSeattle/Tacoma Intl

17h 45m

1 stop

SYD7:45 pmSydney Kingsford Smith

Jan 30

SYD9:40 pmSydney Kingsford Smith

18h 59m

2 stops

SEA9:39 pmSeattle/Tacoma Intl

$1,191

Qantas Airways flights from Seattle to Australia

Our best Qantas Airways deals on Seattle to Australia flight tickets

Qantas Airways

Feb 5

SEA6:00 amSeattle/Tacoma Intl

38h 35m

2 stops

MEL3:35 pmMelbourne

Feb 11

MEL12:00 pmMelbourne

24h 52m

1 stop

SEA5:52 pmSeattle/Tacoma Intl

$892

Qantas Airways

Feb 13

SEA4:50 pmSeattle/Tacoma Intl

21h 40m

1 stop

MEL9:30 amMelbourne

Feb 20

MEL6:45 amMelbourne

31h 13m

2 stops

SEA6:58 pmSeattle/Tacoma Intl

$911

Qantas Airways

Feb 11

SEA3:57 pmSeattle/Tacoma Intl

22h 33m

1 stop

MEL9:30 amMelbourne

Feb 22

MEL12:00 pmMelbourne

25h 57m

1 stop

SEA6:57 pmSeattle/Tacoma Intl

$1,023

Fly from

Fly to

Route

Depart

Return

Price

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Thu 2/26

5:45 am-8:45 am

1 stop33h 00m

Brisbane

Thu 3/5

10:45 am-7:16 pm

1 stop26h 31m

$797

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Sun 2/8

9:55 am-8:45 am

1 stop28h 50m

Brisbane

Sun 2/15

10:45 am-2:31 pm

1 stop21h 46m

$798

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Thu 2/19

3:40 pm-8:45 am

1 stop23h 05m

Brisbane

Wed 3/4

10:45 am-10:06 pm

1 stop29h 21m

$801

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Thu 2/19

3:40 pm-2:20 pm

2 stops28h 40m

Brisbane

Wed 3/4

10:45 am-7:16 pm

1 stop26h 31m

$814

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Fri 2/27

3:40 pm-8:45 am

1 stop23h 05m

Brisbane

Fri 3/6

6:10 am-9:31 am

2 stops21h 21m

$818

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Wed 2/11

3:57 pm-9:30 am

1 stop22h 33m

Melbourne

Wed 2/18

6:45 am-6:58 pm

2 stops31h 13m

$892

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 3/3

5:50 pm-5:40 pm

2 stops28h 50m

Sydney Kingsford Smith

Tue 3/17

11:20 am-8:58 pm

1 stop27h 38m

$1,066

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 2/9

5:10 pm-9:30 am

1 stop21h 50m

Adelaide

Mon 2/16

2:55 pm-12:59 am

1 stop28h 34m

$1,115

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 2/9

12:25 pm-9:30 am

2 stops26h 35m

Adelaide

Mon 2/16

2:55 pm-10:59 pm

2 stops26h 34m

$1,119

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 4/7

10:15 am-5:10 am

1 stop27h 55m

Perth

Mon 4/27

1:10 am-8:45 am

1 stop22h 35m

$1,128

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 $846. If you aren’t able to travel during the month of August, then book flights to Australia from Seattle during September instead. Flights to Australia in September, while not as cheap as those in August, still average around $860.

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 $1,055 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.

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	17h 40m
Direct flights	None

The fastest flight from Seattle to Australia takes 17h 40m

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 January 2026, there are 11 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 7.9 11,701 reviews	Search Alaska Airlines flights
ANA	PriceFrom $583	Free Cancellation	Rating 8.4 1,069 reviews	Search ANA flights
Qantas Airways	PriceFrom $647	Free Cancellation	Rating 7.5 970 reviews	Search Qantas Airways flights
Philippine Airlines	PriceFrom $758	Free Cancellation	Rating 7.3 954 reviews	Search Philippine Airlines flights
Air Canada	PriceFrom $779	Free Cancellation	Rating 7.1 10,619 reviews	Search Air Canada flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.2 11,120 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $812	Free Cancellation	Rating 7.8 2,827 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $830	Free Cancellation	Rating 7.4 9,156 reviews	Search United Airlines flights
Delta	PriceFrom $842	Free Cancellation	Rating 7.9 8,040 reviews	Search Delta flights
Qatar Airways	PriceFrom $928	Free Cancellation	Rating 7.4 3,714 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.