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 41% 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 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 are refreshed on a daily basis.

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

As of November 2025, 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.

$378 Cheap Flights from Seattle to Australia in 2025/26

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Find the cheapest flights from Seattle to Australia

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

5:50 am - 8:45 amSEA-BNE

32h 55m1 stop

10:45 am - 10:06 pmBNE-SEA

29h 21m1 stop

$782Air Canada

Find Deal

Sun, Jan 11 - Sat, Jan 24

3:40 pm - 8:45 amSEA-BNE

23h 05m1 stop

10:45 am - 9:31 amBNE-SEA

16h 46m1 stop

$785Air Canada

Find Deal

Mon, Feb 2 - Mon, Feb 16

8:45 am - 12:35 pmSEA-PER

35h 50m1 stop

1:15 am - 8:10 amPER-SEA

21h 55m1 stop

$1,097Singapore Airlines

Find Deal

Thu, Feb 19 - Wed, Mar 11

8:45 am - 12:35 pmSEA-PER

35h 50m1 stop

5:05 pm - 8:10 amPER-SEA

30h 05m1 stop

$1,129Singapore Airlines

Find Deal

Thu, Feb 19 - Thu, Mar 12

7:10 am - 8:00 amSEA-MEL

29h 50m1 stop

10:10 am - 10:45 amMEL-SEA

19h 35m1 stop

$1,240Delta

Find Deal

Fri, Dec 5 - Wed, Dec 10

7:11 pm - 8:00 amSEA-MEL

41h 49m2 stops

10:10 am - 11:25 pmMEL-SEA

32h 15m2 stops

$1,245Delta

Find Deal

Thu, Dec 4 - Wed, Dec 10

5:53 pm - 6:15 pmSEA-HBA

29h 22m2 stops

2:35 pm - 8:52 pmHBA-SEA

25h 17m2 stops

$1,331Qantas Airways

Find Deal

Wed, Jan 7 - Wed, Jan 14

3:50 pm - 11:15 amSEA-CBR

24h 25m2 stops

4:25 pm - 6:49 pmCBR-SEA

44h 24m2 stops

$1,356Qantas Airways

Find Deal

Fri, Feb 27 - Sat, Mar 21

6:18 am - 4:20 pmSEA-ADL

39h 32m2 stops

2:55 pm - 3:41 pmADL-SEA

19h 16m1 stop

$1,683United Airlines

Find Deal

Tue, Jan 13 - Sat, Feb 28

5:10 pm - 4:20 pmSEA-ADL

28h 40m2 stops

2:55 pm - 3:41 pmADL-SEA

19h 16m1 stop

$1,748United Airlines

Find Deal

Tue, Jan 13 - Sat, Feb 28

Qantas Airways flights from Seattle to Australia

Our best Qantas Airways deals on Seattle to Australia flight tickets

Qantas Airways

Dec 31

SEA6:00 amSeattle/Tacoma Intl

32h 00m

1 stop

SYD9:00 amSydney Kingsford Smith

Feb 10

SYD7:05 amSydney Kingsford Smith

24h 24m

2 stops

SEA12:29 pmSeattle/Tacoma Intl

$987

Find similar

Qantas Airways

Feb 9

SEA6:00 amSeattle/Tacoma Intl

32h 00m

1 stop

SYD9:00 amSydney Kingsford Smith

Feb 26

SYD7:15 pmSydney Kingsford Smith

42h 39m

2 stops

SEA6:54 pmSeattle/Tacoma Intl

$1,009

Find similar

Qantas Airways

Dec 3

SEA6:05 amSeattle/Tacoma Intl

28h 55m

1 stop

BNE5:00 amBrisbane

Dec 13

BNE6:30 pmBrisbane

41h 50m

2 stops

SEA6:20 pmSeattle/Tacoma Intl

$1,256

Find similar

Air Canada flights from Seattle to Australia

Our best Air Canada deals on Seattle to Australia flight tickets

Air Canada

Jan 11

SEA5:50 amSeattle/Tacoma Intl

32h 55m

1 stop

BNE8:45 amBrisbane

Jan 24

BNE10:45 amBrisbane

29h 21m

1 stop

SEA10:06 pmSeattle/Tacoma Intl

$782

Find similar

Air Canada

Feb 2

SEA3:40 pmSeattle/Tacoma Intl

23h 05m

1 stop

BNE8:45 amBrisbane

Feb 16

BNE10:45 amBrisbane

16h 46m

1 stop

SEA9:31 amSeattle/Tacoma Intl

$785

Find similar

Air Canada

Feb 10

SEA3:40 pmSeattle/Tacoma Intl

23h 05m

1 stop

BNE8:45 amBrisbane

Feb 27

BNE10:45 amBrisbane

21h 46m

1 stop

SEA2:31 pmSeattle/Tacoma Intl

$790

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Sun 1/11

5:50 am-8:45 am

1 stop32h 55m

Brisbane

Sat 1/24

10:45 am-10:06 pm

1 stop29h 21m

$782

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Mon 2/2

3:40 pm-8:45 am

1 stop23h 05m

Brisbane

Mon 2/16

10:45 am-9:31 am

1 stop16h 46m

$785

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Thu 2/19

8:45 am-12:35 pm

1 stop35h 50m

Perth

Wed 3/11

1:15 am-8:10 am

1 stop21h 55m

$1,097

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Thu 2/19

8:45 am-12:35 pm

1 stop35h 50m

Perth

Thu 3/12

5:05 pm-8:10 am

1 stop30h 05m

$1,129

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Fri 12/5

7:10 am-8:00 am

1 stop29h 50m

Melbourne

Wed 12/10

10:10 am-10:45 am

1 stop19h 35m

$1,240

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Thu 12/4

7:11 pm-8:00 am

2 stops41h 49m

Melbourne

Wed 12/10

10:10 am-11:25 pm

2 stops32h 15m

$1,245

SeattleHobart

SEA - HBA

SEAHBA

Seattle/Tacoma Intl

Wed 1/7

5:53 pm-6:15 pm

2 stops29h 22m

Hobart

Wed 1/14

2:35 pm-8:52 pm

2 stops25h 17m

$1,331

SeattleCanberra

SEA - CBR

SEACBR

Seattle/Tacoma Intl

Fri 2/27

3:50 pm-11:15 am

2 stops24h 25m

Canberra

Sat 3/21

4:25 pm-6:49 pm

2 stops44h 24m

$1,356

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 1/13

6:18 am-4:20 pm

2 stops39h 32m

Adelaide

Sat 2/28

2:55 pm-3:41 pm

1 stop19h 16m

$1,683

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 1/13

5:10 pm-4:20 pm

2 stops28h 40m

Adelaide

Sat 2/28

2:55 pm-3:41 pm

1 stop19h 16m

$1,748

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 $895.

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 $870 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

Direct flights	None

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 November 2025, 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
ANA	PriceFrom $583	Free Cancellation	Rating 8.4 1,010 reviews	Search ANA flights
Alaska Airlines	PriceFrom $591	Free Cancellation	Rating 8.0 11,340 reviews	Search Alaska Airlines flights
Qantas Airways	PriceFrom $647	Free Cancellation	Rating 7.5 943 reviews	Search Qantas Airways flights
Air Canada	PriceFrom $779	Free Cancellation	Rating 7.1 10,468 reviews	Search Air Canada flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.2 11,040 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $820	Free Cancellation	Rating 7.8 2,813 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $832	Free Cancellation	Rating 7.4 9,038 reviews	Search United Airlines flights
Delta	PriceFrom $842	Free Cancellation	Rating 7.9 7,994 reviews	Search Delta flights
Singapore Airlines	PriceFrom $1,239	Free Cancellation	Rating 8.1 1,409 reviews	Search Singapore Airlines flights
Qatar Airways	PriceFrom $1,307	Free Cancellation	Rating 7.4 3,668 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.