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, American Airlines, and Air Canada 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 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.

$377 Cheap Flights from Seattle to Australia in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

5:50 am - 8:45 am

SEA

BNE

32h 55m1 stop

9:45 am - 3:01 pm

BNE

SEA

22h 16m1 stop

$795Air Canada

Thu, Feb 19 - Thu, Mar 12

8:00 pm - 8:45 am

SEA

BNE

18h 45m1 stop

10:45 am - 9:15 am

BNE

SEA

16h 30m1 stop

$797Air Canada

Thu, Feb 5 - Thu, Feb 12

5:53 pm - 3:35 pm

SEA

MEL

26h 42m2 stops

9:45 am - 10:49 pm

MEL

SEA

30h 04m1 stop

$983Qantas Airways

Tue, Feb 10 - Mon, Apr 20

12:24 pm - 9:30 am

SEA

MEL

26h 06m1 stop

1:00 pm - 6:26 pm

MEL

SEA

24h 26m1 stop

$1,002United Airlines

Thu, Feb 5 - Thu, Feb 12

3:52 pm - 9:20 am

SEA

MEL

23h 28m2 stops

12:00 pm - 2:16 pm

MEL

SEA

20h 16m1 stop

$1,010Qantas Airways

Tue, Mar 10 - Tue, Mar 24

7:37 pm - 9:15 am

SEA

MEL

19h 38m1 stop

10:55 am - 2:36 pm

MEL

SEA

20h 41m1 stop

$1,011United Airlines

Wed, Apr 1 - Wed, Apr 15

7:25 am - 8:00 am

SEA

MEL

29h 35m1 stop

9:10 am - 7:59 pm

MEL

SEA

28h 49m1 stop

$1,066Delta

Wed, Mar 4 - Wed, Mar 25

8:30 am - 8:00 am

SEA

MEL

28h 30m2 stops

9:10 am - 2:54 pm

MEL

SEA

23h 44m2 stops

$1,070Delta

Wed, Mar 4 - Sun, Mar 15

10:15 am - 11:55 pm

SEA

PER

22h 40m1 stop

1:10 am - 8:45 am

PER

SEA

22h 35m1 stop

$1,093Singapore Airlines

Tue, Apr 7 - Mon, Apr 27

10:15 am - 4:20 pm

SEA

ADL

37h 35m1 stop

5:35 pm - 8:45 am

ADL

SEA

31h 40m1 stop

$1,636Singapore Airlines

Sat, May 9 - Sat, May 16

ANA flights from Seattle to Australia

Our best ANA deals on Seattle to Australia flight tickets

ANA

May 20

SEA4:30 pmSeattle/Tacoma Intl

33h 45m

1 stop

SYD7:15 pmSydney Kingsford Smith

May 26

SYD8:55 pmSydney Kingsford Smith

34h 30m

1 stop

SEA2:25 pmSeattle/Tacoma Intl

$1,042

Find similar

ANA

Apr 8

SEA10:10 amSeattle/Tacoma Intl

40h 35m

3 stops

HBA7:45 pmHobart

Apr 29

HBA9:55 amHobart

45h 30m

2 stops

SEA2:25 pmSeattle/Tacoma Intl

$1,329

Find similar

Qantas Airways flights from Seattle to Australia

Our best Qantas Airways deals on Seattle to Australia flight tickets

Qantas Airways

Feb 10

SEA5:53 pmSeattle/Tacoma Intl

26h 42m

2 stops

MEL3:35 pmMelbourne

Apr 20

MEL9:45 amMelbourne

30h 04m

1 stop

SEA10:49 pmSeattle/Tacoma Intl

$983

Find similar

Qantas Airways

Mar 10

SEA3:52 pmSeattle/Tacoma Intl

23h 28m

2 stops

MEL9:20 amMelbourne

Mar 24

MEL12:00 pmMelbourne

20h 16m

1 stop

SEA2:16 pmSeattle/Tacoma Intl

$1,010

Find similar

Qantas Airways

Jan 13

SEA3:45 pmSeattle/Tacoma Intl

24h 55m

2 stops

MEL11:40 amMelbourne

Jan 20

MEL5:45 pmMelbourne

21h 49m

2 stops

SEA8:34 pmSeattle/Tacoma Intl

$1,044

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Thu 2/19

5:50 am-8:45 am

1 stop32h 55m

Brisbane

Thu 3/12

9:45 am-3:01 pm

1 stop22h 16m

$795

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Thu 2/5

8:00 pm-8:45 am

1 stop18h 45m

Brisbane

Thu 2/12

10:45 am-9:15 am

1 stop16h 30m

$797

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Tue 2/10

5:53 pm-3:35 pm

2 stops26h 42m

Melbourne

Mon 4/20

9:45 am-10:49 pm

1 stop30h 04m

$983

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Thu 2/5

12:24 pm-9:30 am

1 stop26h 06m

Melbourne

Thu 2/12

1:00 pm-6:26 pm

1 stop24h 26m

$1,002

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Tue 3/10

3:52 pm-9:20 am

2 stops23h 28m

Melbourne

Tue 3/24

12:00 pm-2:16 pm

1 stop20h 16m

$1,010

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Wed 4/1

7:37 pm-9:15 am

1 stop19h 38m

Melbourne

Wed 4/15

10:55 am-2:36 pm

1 stop20h 41m

$1,011

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Wed 3/4

7:25 am-8:00 am

1 stop29h 35m

Melbourne

Wed 3/25

9:10 am-7:59 pm

1 stop28h 49m

$1,066

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Wed 3/4

8:30 am-8:00 am

2 stops28h 30m

Melbourne

Sun 3/15

9:10 am-2:54 pm

2 stops23h 44m

$1,070

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

$1,093

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 5/9

10:15 am-4:20 pm

1 stop37h 35m

Adelaide

Sat 5/16

5:35 pm-8:45 am

1 stop31h 40m

$1,636

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 $1,069 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.

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 December 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
Alaska Airlines	PriceFrom $97	Free Cancellation	Rating 8.0 11,517 reviews	Search Alaska Airlines flights
ANA	PriceFrom $583	Free Cancellation	Rating 8.4 1,040 reviews	Search ANA flights
Qantas Airways	PriceFrom $647	Free Cancellation	Rating 7.5 949 reviews	Search Qantas Airways flights
Philippine Airlines	PriceFrom $758	Free Cancellation	Rating 7.3 943 reviews	Search Philippine Airlines flights
Air Canada	PriceFrom $779	Free Cancellation	Rating 7.1 10,551 reviews	Search Air Canada flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.2 11,050 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $812	Free Cancellation	Rating 7.8 2,820 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $830	Free Cancellation	Rating 7.4 9,107 reviews	Search United Airlines flights
Delta	PriceFrom $842	Free Cancellation	Rating 7.9 8,015 reviews	Search Delta flights
Singapore Airlines	PriceFrom $1,265	Free Cancellation	Rating 8.1 1,419 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.