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 43% of people opting to fly with this airline when traveling to Australia. Keep in mind that there are 12 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?

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

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

As of December 2025, there are 12 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.

$390 Cheap Flights from Seattle to Australia in 2025/26

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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.

8:00 pm - 8:45 am

SEA

BNE

18h 45m1 stop

10:45 am - 7:16 pm

BNE

SEA

26h 31m1 stop

$793Air Canada

Tue, Dec 23 - Fri, Dec 26

10:05 am - 8:45 am

SEA

BNE

28h 40m1 stop

10:45 am - 9:31 am

BNE

SEA

16h 46m1 stop

$795Air Canada

Tue, Feb 10 - Fri, Feb 27

3:40 pm - 8:45 am

SEA

BNE

23h 05m1 stop

10:45 am - 2:31 pm

BNE

SEA

21h 46m1 stop

$796Air Canada

Wed, Feb 11 - Sat, Feb 28

12:35 pm - 10:00 am

SEA

MEL

26h 25m1 stop

11:30 am - 9:01 pm

MEL

SEA

28h 31m2 stops

$1,002United Airlines

Sun, Feb 1 - Sat, Feb 14

12:25 pm - 10:00 am

SEA

MEL

26h 35m2 stops

1:00 pm - 3:41 pm

MEL

SEA

21h 41m1 stop

$1,003United Airlines

Mon, Feb 2 - Sun, Feb 15

6:00 am - 9:30 am

SEA

MEL

32h 30m1 stop

12:00 pm - 1:59 pm

MEL

SEA

20h 59m1 stop

$1,007Qantas Airways

Thu, Feb 5 - Thu, Feb 12

10:15 am - 11:55 pm

SEA

PER

22h 40m1 stop

1:10 am - 8:45 am

PER

SEA

22h 35m1 stop

$1,097Singapore Airlines

Tue, Apr 7 - Mon, Apr 27

10:15 am - 11:55 pm

SEA

PER

22h 40m1 stop

1:10 am - 8:45 am

PER

SEA

22h 35m1 stop

$1,104Singapore Airlines

Tue, Apr 7 - Mon, Apr 27

7:00 am - 8:15 am

SEA

ADL

30h 45m2 stops

5:10 pm - 5:25 am

ADL

SEA

30h 45m2 stops

$1,408Alaska Airlines

Tue, Jan 13 - Sat, Feb 28

6:00 am - 4:50 pm

SEA

CNS

40h 50m2 stops

5:35 pm - 12:29 pm

CNS

SEA

60h 54m2 stops

$1,501Qantas Airways

Thu, Jan 8 - Thu, Jan 15

Air Canada flights from Seattle to Australia

Our best Air Canada deals on Seattle to Australia flight tickets

Air Canada

Dec 23

SEA8:00 pmSeattle/Tacoma Intl

18h 45m

1 stop

BNE8:45 amBrisbane

Dec 26

BNE10:45 amBrisbane

26h 31m

1 stop

SEA7:16 pmSeattle/Tacoma Intl

$793

Find similar

Air Canada

Feb 10

SEA10:05 amSeattle/Tacoma Intl

28h 40m

1 stop

BNE8:45 amBrisbane

Feb 27

BNE10:45 amBrisbane

16h 46m

1 stop

SEA9:31 amSeattle/Tacoma Intl

$795

Find similar

Air Canada

Feb 11

SEA3:40 pmSeattle/Tacoma Intl

23h 05m

1 stop

BNE8:45 amBrisbane

Feb 28

BNE10:45 amBrisbane

21h 46m

1 stop

SEA2:31 pmSeattle/Tacoma Intl

$796

Find similar

ANA flights from Seattle to Australia

Our best ANA deals on Seattle to Australia flight tickets

ANA

May 3

SEA8:42 amSeattle/Tacoma Intl

41h 33m

2 stops

SYD7:15 pmSydney Kingsford Smith

May 27

SYD8:55 pmSydney Kingsford Smith

34h 30m

1 stop

SEA2:25 pmSeattle/Tacoma Intl

$993

Find similar

ANA

Jun 1

SEA4:30 pmSeattle/Tacoma Intl

58h 15m

2 stops

HBA7:45 pmHobart

Jun 8

HBA9:55 amHobart

49h 35m

3 stops

SEA6:30 pmSeattle/Tacoma Intl

$1,311

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 12/23

8:00 pm-8:45 am

1 stop18h 45m

Brisbane

Fri 12/26

10:45 am-7:16 pm

1 stop26h 31m

$793

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Tue 2/10

10:05 am-8:45 am

1 stop28h 40m

Brisbane

Fri 2/27

10:45 am-9:31 am

1 stop16h 46m

$795

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Wed 2/11

3:40 pm-8:45 am

1 stop23h 05m

Brisbane

Sat 2/28

10:45 am-2:31 pm

1 stop21h 46m

$796

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sun 2/1

12:35 pm-10:00 am

1 stop26h 25m

Melbourne

Sat 2/14

11:30 am-9:01 pm

2 stops28h 31m

$1,002

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Mon 2/2

12:25 pm-10:00 am

2 stops26h 35m

Melbourne

Sun 2/15

1:00 pm-3:41 pm

1 stop21h 41m

$1,003

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Thu 2/5

6:00 am-9:30 am

1 stop32h 30m

Melbourne

Thu 2/12

12:00 pm-1:59 pm

1 stop20h 59m

$1,007

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 4/7

10:15 am-11:55 pm

1 stop22h 40m

Perth

Mon 4/27

1:10 am-8:45 am

1 stop22h 35m

$1,097

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 4/7

10:15 am-11:55 pm

1 stop22h 40m

Perth

Mon 4/27

1:10 am-8:45 am

1 stop22h 35m

$1,104

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 1/13

7:00 am-8:15 am

2 stops30h 45m

Adelaide

Sat 2/28

5:10 pm-5:25 am

2 stops30h 45m

$1,408

SeattleCairns

SEA - CNS

SEACNS

Seattle/Tacoma Intl

Thu 1/8

6:00 am-4:50 pm

2 stops40h 50m

Cairns

Thu 1/15

5:35 pm-12:29 pm

2 stops60h 54m

$1,501

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 $878.

What is the cheapest day to depart on your flight to Australia?

The cheapest day to depart from Seattle to Australia is on a Tuesday. Travelers who choose to depart for Australia on a Tuesday will often find tickets for as low as $1,078. On the other hand, Thursday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,156.

What is the cheapest time of day to depart on your flight to Australia?

Flying to Australia from Seattle in the evening is the least expensive time of day to depart. momondo users have found prices as low as $1,078 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $1,152 on average. Flights to Australia from Seattle in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 $1,062 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 $877 on momondo.

Can stopping save me money on Seattle to Australia flights?

You could potentially save up to 21% 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 18m
Direct flights	None

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

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 December 2025, there are 12 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
ANA	PriceFrom $583	Free Cancellation	Rating 8.4 1,021 reviews	Search ANA flights
Alaska Airlines	PriceFrom $591	Free Cancellation	Rating 8.0 11,432 reviews	Search Alaska Airlines flights
Philippine Airlines	PriceFrom $758	Free Cancellation	Rating 7.3 941 reviews	Search Philippine Airlines flights
Air Canada	PriceFrom $779	Free Cancellation	Rating 7.1 10,517 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $789	Free Cancellation	Rating 7.5 947 reviews	Search Qantas Airways flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.2 11,049 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $813	Free Cancellation	Rating 7.8 2,817 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $831	Free Cancellation	Rating 7.4 9,095 reviews	Search United Airlines flights
Delta	PriceFrom $842	Free Cancellation	Rating 7.9 8,007 reviews	Search Delta flights
Singapore Airlines	PriceFrom $1,239	Free Cancellation	Rating 8.1 1,412 reviews	Search Singapore Airlines 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.