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

Philippine Airlines, Air Canada, and American Airlines are the most popular carriers 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 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.

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.

$408 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

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Cheap round-trip flights

Enter your travel dates to find the best prices.

10:05 am - 8:45 amSEA-BNE

28h 40m1 stop

10:45 am - 2:31 pmBNE-SEA

21h 46m1 stop

$832Air Canada

Find Deal

sáb, jan 17 - dom, jan 25

8:00 pm - 8:45 amSEA-BNE

18h 45m1 stop

10:45 am - 7:16 pmBNE-SEA

26h 31m1 stop

$835Air Canada

Find Deal

ter, fev 10 - sex, fev 27

11:59 pm - 7:30 amSEA-BNE

37h 31m2 stops

11:40 am - 11:10 pmBNE-SEA

29h 30m2 stops

$967United Airlines

Find Deal

sáb, nov 15 - ter, nov 25

2:59 pm - 9:30 amSEA-MEL

23h 31m1 stop

6:45 am - 6:20 pmMEL-SEA

30h 35m2 stops

$1,043Qantas Airways

Find Deal

ter, dez 2 - ter, dez 9

3:35 pm - 9:30 amSEA-MEL

23h 55m1 stop

12:00 pm - 2:16 pmMEL-SEA

20h 16m1 stop

$1,045Qantas Airways

Find Deal

ter, mar 10 - ter, mar 24

1:38 pm - 8:20 amSEA-BNE

48h 42m2 stops

10:40 am - 2:44 pmBNE-SEA

22h 04m2 stops

$1,072Delta

Find Deal

ter, fev 10 - sex, fev 27

5:05 pm - 9:30 amSEA-MEL

21h 25m1 stop

11:30 am - 9:17 pmMEL-SEA

28h 47m2 stops

$1,082United Airlines

Find Deal

qui, dez 4 - qui, dez 18

7:00 pm - 8:00 amSEA-MEL

42h 00m2 stops

9:10 am - 1:00 pmMEL-SEA

21h 50m1 stop

$1,107Delta

Find Deal

dom, fev 22 - dom, mar 15

8:45 am - 12:35 pmSEA-PER

35h 50m1 stop

5:05 pm - 8:10 amPER-SEA

30h 05m1 stop

$1,143Singapore Airlines

Find Deal

ter, fev 17 - sáb, mar 14

8:45 am - 12:35 pmSEA-PER

35h 50m1 stop

6:40 am - 7:10 amPER-SEA

40h 30m1 stop

$1,160Singapore Airlines

Find Deal

ter, fev 17 - sex, fev 27

Philippine Airlines flights from Seattle to Australia

Our best Philippine Airlines deals on Seattle to Australia flight tickets

Philippine Airlines

Feb 15

SEA9:30 pmSeattle/Tacoma Intl

41h 20m

1 stop

SYD9:50 amSydney Kingsford Smith

Feb 25

SYD11:35 amSydney Kingsford Smith

26h 05m

1 stop

SEA6:40 pmSeattle/Tacoma Intl

$939

Find similar

Philippine Airlines

Feb 15

SEA9:30 pmSeattle/Tacoma Intl

41h 20m

1 stop

SYD9:50 amSydney Kingsford Smith

Feb 24

SYD11:35 amSydney Kingsford Smith

26h 05m

1 stop

SEA6:40 pmSeattle/Tacoma Intl

$966

Find similar

Philippine Airlines

Feb 20

SEA9:30 pmSeattle/Tacoma Intl

42h 35m

1 stop

BNE10:05 amBrisbane

Mar 1

BNE11:05 amBrisbane

25h 35m

1 stop

SEA6:40 pmSeattle/Tacoma Intl

$970

Find similar

Air Canada flights from Seattle to Australia

Our best Air Canada deals on Seattle to Australia flight tickets

Air Canada

Nov 11

SEA5:50 amSeattle/Tacoma Intl

32h 55m

1 stop

BNE8:45 amBrisbane

Dec 2

BNE10:45 amBrisbane

21h 46m

1 stop

SEA2:31 pmSeattle/Tacoma Intl

$809

Find similar

Air Canada

Jan 17

SEA10:05 amSeattle/Tacoma Intl

28h 40m

1 stop

BNE8:45 amBrisbane

Jan 25

BNE10:45 amBrisbane

21h 46m

1 stop

SEA2:31 pmSeattle/Tacoma Intl

$832

Find similar

Air Canada

Feb 10

SEA8:00 pmSeattle/Tacoma Intl

18h 45m

1 stop

BNE8:45 amBrisbane

Feb 27

BNE10:45 amBrisbane

26h 31m

1 stop

SEA7:16 pmSeattle/Tacoma Intl

$835

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

sáb 1/17

10:05 am-8:45 am

1 stop28h 40m

Brisbane

dom 1/25

10:45 am-2:31 pm

1 stop21h 46m

$832

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

ter 2/10

8:00 pm-8:45 am

1 stop18h 45m

Brisbane

sex 2/27

10:45 am-7:16 pm

1 stop26h 31m

$835

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

sáb 11/15

11:59 pm-7:30 am

2 stops37h 31m

Brisbane

ter 11/25

11:40 am-11:10 pm

2 stops29h 30m

$967

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

ter 12/2

2:59 pm-9:30 am

1 stop23h 31m

Melbourne

ter 12/9

6:45 am-6:20 pm

2 stops30h 35m

$1,043

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

ter 3/10

3:35 pm-9:30 am

1 stop23h 55m

Melbourne

ter 3/24

12:00 pm-2:16 pm

1 stop20h 16m

$1,045

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

ter 2/10

1:38 pm-8:20 am

2 stops48h 42m

Brisbane

sex 2/27

10:40 am-2:44 pm

2 stops22h 04m

$1,072

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

qui 12/4

5:05 pm-9:30 am

1 stop21h 25m

Melbourne

qui 12/18

11:30 am-9:17 pm

2 stops28h 47m

$1,082

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

dom 2/22

7:00 pm-8:00 am

2 stops42h 00m

Melbourne

dom 3/15

9:10 am-1:00 pm

1 stop21h 50m

$1,107

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

ter 2/17

8:45 am-12:35 pm

1 stop35h 50m

Perth

sáb 3/14

5:05 pm-8:10 am

1 stop30h 05m

$1,143

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

ter 2/17

8:45 am-12:35 pm

1 stop35h 50m

Perth

sex 2/27

6:40 am-7:10 am

1 stop40h 30m

$1,160

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 $863. 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 $897.

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 $1,060 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 $883 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 1,000 reviews	Search ANA flights
Alaska Airlines	PriceFrom $591	Free Cancellation	Rating 8.0 11,237 reviews	Search Alaska Airlines flights
Qantas Airways	PriceFrom $647	Free Cancellation	Rating 7.5 927 reviews	Search Qantas Airways flights
Air Canada	PriceFrom $779	Free Cancellation	Rating 7.1 10,400 reviews	Search Air Canada flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.2 11,038 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $820	Free Cancellation	Rating 7.8 2,799 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $832	Free Cancellation	Rating 7.4 8,998 reviews	Search United Airlines flights
Delta	PriceFrom $842	Free Cancellation	Rating 7.9 8,002 reviews	Search Delta flights
Singapore Airlines	PriceFrom $1,239	Free Cancellation	Rating 8.1 1,391 reviews	Search Singapore Airlines flights
Qatar Airways	PriceFrom $1,307	Free Cancellation	Rating 7.4 3,660 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.