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?

Air Canada, Philippine Airlines, 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 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.

$405 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.

3:40 pm - 8:45 am

SEA

BNE

23h 05m1 stop

10:45 am - 7:16 pm

BNE

SEA

26h 31m1 stop

$797Air Canada

Do, Feb 19 - Mi, Mrz 4

5:50 am - 8:45 am

SEA

BNE

32h 55m1 stop

10:45 am - 9:31 am

BNE

SEA

16h 46m1 stop

$798Air Canada

Do, Feb 19 - Mi, Mrz 4

3:52 pm - 6:10 am

SEA

SYD

20h 18m1 stop

6:00 am - 10:42 pm

SYD

SEA

34h 42m2 stops

$1,084Qantas Airways

Di, Mrz 10 - Di, Mrz 31

3:57 pm - 7:25 am

SEA

SYD

20h 28m1 stop

7:05 am - 12:29 pm

SYD

SEA

24h 24m2 stops

$1,096Qantas Airways

Mi, Jan 21 - Mo, Jan 26

10:15 am - 11:55 pm

SEA

PER

22h 40m1 stop

1:10 am - 8:45 am

PER

SEA

22h 35m1 stop

$1,100Singapore Airlines

Di, Apr 7 - Mo, Apr 27

10:15 am - 11:55 pm

SEA

PER

22h 40m1 stop

1:10 am - 8:45 am

PER

SEA

22h 35m1 stop

$1,111Singapore Airlines

Di, Apr 7 - Mo, Apr 27

5:20 pm - 8:30 am

SEA

ADL

21h 40m1 stop

1:55 pm - 4:14 pm

ADL

SEA

19h 49m1 stop

$1,115United Airlines

Mo, Mrz 9 - Mo, Mrz 23

9:55 am - 7:45 pm

SEA

HBA

64h 50m3 stops

9:55 am - 6:30 pm

HBA

SEA

49h 35m3 stops

$1,298ANA

Mo, Jun 1 - Mo, Jun 8

9:55 am - 7:45 pm

SEA

HBA

64h 50m3 stops

9:55 am - 2:25 pm

HBA

SEA

45h 30m2 stops

$1,306ANA

Mo, Jun 1 - Mo, Jun 8

8:00 am - 9:40 am

SEA

OOL

32h 40m3 stops

7:20 am - 10:39 am

OOL

SEA

20h 19m2 stops

$1,621United Airlines

Fr, Mrz 20 - Mo, Mrz 30

Air Canada flights from Seattle to Australia

Our best Air Canada deals on Seattle to Australia flight tickets

Air Canada

Feb 19

SEA3:40 pmSeattle/Tacoma Intl

23h 05m

1 stop

BNE8:45 amBrisbane

Mar 4

BNE10:45 amBrisbane

26h 31m

1 stop

SEA7:16 pmSeattle/Tacoma Intl

$797

Air Canada

Feb 19

SEA5:50 amSeattle/Tacoma Intl

32h 55m

1 stop

BNE8:45 amBrisbane

Mar 4

BNE10:45 amBrisbane

16h 46m

1 stop

SEA9:31 amSeattle/Tacoma Intl

$798

Air Canada

Feb 6

SEA8:00 pmSeattle/Tacoma Intl

18h 45m

1 stop

BNE8:45 amBrisbane

Feb 13

BNE10:45 amBrisbane

16h 30m

1 stop

SEA9:15 amSeattle/Tacoma Intl

$802

Hawaiian Airlines flights from Seattle to Australia

Our best Hawaiian Airlines deals on Seattle to Australia flight tickets

Hawaiian Airlines

Feb 1

SEA3:45 pmSeattle/Tacoma Intl

33h 00m

1 stop

SYD7:45 pmSydney Kingsford Smith

Feb 15

SYD9:40 pmSydney Kingsford Smith

21h 00m

1 stop

SEA11:40 pmSeattle/Tacoma Intl

$1,146

Hawaiian Airlines

Jan 12

SEA7:00 amSeattle/Tacoma Intl

17h 45m

1 stop

SYD7:45 pmSydney Kingsford Smith

Jan 14

SYD9:40 pmSydney Kingsford Smith

18h 59m

2 stops

SEA9:39 pmSeattle/Tacoma Intl

$1,184

Hawaiian Airlines

Jan 9

SEA7:00 amSeattle/Tacoma Intl

17h 45m

1 stop

SYD7:45 pmSydney Kingsford Smith

Jan 19

SYD9:40 pmSydney Kingsford Smith

18h 59m

2 stops

SEA9:39 pmSeattle/Tacoma Intl

$1,197

Fly from

Fly to

Route

Depart

Return

Price

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Do 2/19

3:40 pm-8:45 am

1 stop23h 05m

Brisbane

Mi 3/4

10:45 am-7:16 pm

1 stop26h 31m

$797

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Do 2/19

5:50 am-8:45 am

1 stop32h 55m

Brisbane

Mi 3/4

10:45 am-9:31 am

1 stop16h 46m

$798

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Di 3/10

3:52 pm-6:10 am

1 stop20h 18m

Sydney Kingsford Smith

Di 3/31

6:00 am-10:42 pm

2 stops34h 42m

$1,084

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mi 1/21

3:57 pm-7:25 am

1 stop20h 28m

Sydney Kingsford Smith

Mo 1/26

7:05 am-12:29 pm

2 stops24h 24m

$1,096

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Di 4/7

10:15 am-11:55 pm

1 stop22h 40m

Perth

Mo 4/27

1:10 am-8:45 am

1 stop22h 35m

$1,100

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Di 4/7

10:15 am-11:55 pm

1 stop22h 40m

Perth

Mo 4/27

1:10 am-8:45 am

1 stop22h 35m

$1,111

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mo 3/9

5:20 pm-8:30 am

1 stop21h 40m

Adelaide

Mo 3/23

1:55 pm-4:14 pm

1 stop19h 49m

$1,115

SeattleHobart

SEA - HBA

SEAHBA

Seattle/Tacoma Intl

Mo 6/1

9:55 am-7:45 pm

3 stops64h 50m

Hobart

Mo 6/8

9:55 am-6:30 pm

3 stops49h 35m

$1,298

SeattleHobart

SEA - HBA

SEAHBA

Seattle/Tacoma Intl

Mo 6/1

9:55 am-7:45 pm

3 stops64h 50m

Hobart

Mo 6/8

9:55 am-2:25 pm

2 stops45h 30m

$1,306

SeattleCoolangatta

SEA - OOL

SEAOOL

Seattle/Tacoma Intl

Fr 3/20

8:00 am-9:40 am

3 stops32h 40m

Coolangatta Gold Coast

Mo 3/30

7:20 am-10:39 am

2 stops20h 19m

$1,621

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 $1,056 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 45m
Direct flights	None

The fastest flight from Seattle to Australia takes 17h 45m

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 8.0 11,672 reviews	Search Alaska Airlines flights
ANA	PriceFrom $583	Free Cancellation	Rating 8.4 1,063 reviews	Search ANA flights
Qantas Airways	PriceFrom $647	Free Cancellation	Rating 7.5 968 reviews	Search Qantas Airways flights
Philippine Airlines	PriceFrom $758	Free Cancellation	Rating 7.3 949 reviews	Search Philippine Airlines flights
Air Canada	PriceFrom $779	Free Cancellation	Rating 7.1 10,603 reviews	Search Air Canada flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.2 11,097 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $812	Free Cancellation	Rating 7.8 2,824 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $830	Free Cancellation	Rating 7.4 9,142 reviews	Search United Airlines flights
Delta	PriceFrom $842	Free Cancellation	Rating 7.9 8,032 reviews	Search Delta flights
Qatar Airways	PriceFrom $928	Free Cancellation	Rating 7.4 3,702 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.