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

Air New Zealand, United Airlines, and Philippine 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 36% 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.

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 May 2026, 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.

$469 Cheap Flights from Seattle to Australia in 2026

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.

6:14 pm - 7:30 am

SEA

SYD

20h 16m

1 stop

9:10 am - 11:52 am

SYD

SEA

19h 42m

1 stop

$1,052Multiple Airlines

Mon, Jun 1 - Mon, Jun 29

5:31 pm - 7:05 am

SEA

SYD

20h 34m

1 stop

9:10 am - 12:01 pm

SYD

SEA

19h 51m

1 stop

$1,055Multiple Airlines

Sat, May 23 - Fri, Jun 5

3:55 pm - 6:45 am

SEA

MEL

21h 50m

1 stop

9:45 am - 12:20 pm

MEL

SEA

20h 35m

1 stop

$1,057Qantas Airways

Fri, Sep 25 - Fri, Oct 23

2:20 pm - 7:05 am

SEA

SYD

23h 45m

1 stop

5:50 pm - 8:56 pm

SYD

SEA

20h 06m

1 stop

$1,069Qantas Airways

Sat, Aug 1 - Fri, Aug 14

11:40 am - 6:45 am

SEA

MEL

26h 05m

2 stops

9:45 am - 4:32 pm

MEL

SEA

23h 47m

1 stop

$1,074American Airlines

Fri, Jul 24 - Tue, Aug 11

6:50 am - 6:45 am

SEA

MEL

30h 55m

1 stop

9:45 am - 9:49 pm

MEL

SEA

29h 04m

1 stop

$1,080American Airlines

Sat, May 30 - Sat, Jun 6

12:51 pm - 7:30 am

SEA

MEL

25h 39m

2 stops

10:55 am - 12:34 pm

MEL

SEA

18h 39m

1 stop

$1,089United Airlines

Fri, May 15 - Thu, May 28

10:29 am - 8:15 am

SEA

MEL

28h 46m

1 stop

10:55 am - 7:03 pm

MEL

SEA

25h 08m

1 stop

$1,092United Airlines

Mon, Jun 1 - Fri, Jun 12

10:15 am - 11:55 pm

SEA

PER

22h 40m

1 stop

1:45 pm - 8:45 am

PER

SEA

34h 00m

1 stop

$1,305Singapore Airlines

Thu, Sep 3 - Sat, Oct 3

10:15 am - 5:10 am

SEA

PER

27h 55m

1 stop

1:45 pm - 8:45 am

PER

SEA

34h 00m

1 stop

$1,386Singapore Airlines

Thu, Sep 3 - Sat, Oct 3

ANA flights from Seattle to Australia

Our best ANA deals on Seattle to Australia flight tickets

ANA

May 11

SEA4:30 pmSeattle/Tacoma Intl

33h 40m

1 stop

SYD7:10 pmSydney Kingsford Smith

May 19

SYD8:55 pmSydney Kingsford Smith

34h 30m

1 stop

SEA2:25 pmSeattle/Tacoma Intl

$1,071

ANA

May 11

SEA4:30 pmSeattle/Tacoma Intl

33h 40m

1 stop

SYD7:10 pmSydney Kingsford Smith

Jun 15

SYD11:45 amSydney Kingsford Smith

23h 45m

2 stops

SEA6:30 pmSeattle/Tacoma Intl

$1,081

ANA

May 10

SEA4:30 pmSeattle/Tacoma Intl

33h 40m

1 stop

SYD7:10 pmSydney Kingsford Smith

Jun 14

SYD8:55 pmSydney Kingsford Smith

38h 35m

2 stops

SEA6:30 pmSeattle/Tacoma Intl

$1,092

Delta flights from Seattle to Australia

Our best Delta deals on Seattle to Australia flight tickets

Delta

Oct 5

SEA2:30 pmSeattle/Tacoma Intl

24h 20m

1 stop

MEL8:50 amMelbourne

Oct 13

MEL11:00 amMelbourne

27h 31m

1 stop

SEA8:31 pmSeattle/Tacoma Intl

$1,100

Delta

Sep 25

SEA1:30 pmSeattle/Tacoma Intl

25h 20m

2 stops

MEL7:50 amMelbourne

Oct 23

MEL11:00 amMelbourne

20h 00m

1 stop

SEA1:00 pmSeattle/Tacoma Intl

$1,104

Delta

Sep 25

SEA9:40 amSeattle/Tacoma Intl

29h 10m

2 stops

MEL7:50 amMelbourne

Oct 23

MEL11:00 amMelbourne

21h 50m

2 stops

SEA2:50 pmSeattle/Tacoma Intl

$1,105

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 6/1

6:14 pm-7:30 am

1 stop20h 16m

Sydney Kingsford Smith

Mon 6/29

9:10 am-11:52 am

1 stop19h 42m

$1,052

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 5/23

5:31 pm-7:05 am

1 stop20h 34m

Sydney Kingsford Smith

Fri 6/5

9:10 am-12:01 pm

1 stop19h 51m

$1,055

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Fri 9/25

3:55 pm-6:45 am

1 stop21h 50m

Melbourne

Fri 10/23

9:45 am-12:20 pm

1 stop20h 35m

$1,057

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 8/1

2:20 pm-7:05 am

1 stop23h 45m

Sydney Kingsford Smith

Fri 8/14

5:50 pm-8:56 pm

1 stop20h 06m

$1,069

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Fri 7/24

11:40 am-6:45 am

2 stops26h 05m

Melbourne

Tue 8/11

9:45 am-4:32 pm

1 stop23h 47m

$1,074

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sat 5/30

6:50 am-6:45 am

1 stop30h 55m

Melbourne

Sat 6/6

9:45 am-9:49 pm

1 stop29h 04m

$1,080

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Fri 5/15

12:51 pm-7:30 am

2 stops25h 39m

Melbourne

Thu 5/28

10:55 am-12:34 pm

1 stop18h 39m

$1,089

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Mon 6/1

10:29 am-8:15 am

1 stop28h 46m

Melbourne

Fri 6/12

10:55 am-7:03 pm

1 stop25h 08m

$1,092

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Thu 9/3

10:15 am-11:55 pm

1 stop22h 40m

Perth

Sat 10/3

1:45 pm-8:45 am

1 stop34h 00m

$1,305

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Thu 9/3

10:15 am-5:10 am

1 stop27h 55m

Perth

Sat 10/3

1:45 pm-8:45 am

1 stop34h 00m

$1,386

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 January is, on average, the cheapest month to fly to Australia from Seattle, with most prices found around $97. If you aren’t able to travel during the month of January, then book flights to Australia from Seattle during February instead. Flights to Australia in February, while not as cheap as those in January, still average around $142.

How far in advance should I book a flight from Seattle 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 $1,068 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 $900 on momondo.

Can stopping save me money on Seattle to Australia flights?

You could potentially save up to 18% 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	17h 50m
Direct flights	None

The fastest flight from Seattle to Australia takes 17h 50m

There are no direct flights from Seattle to Australia. There are no popular flight routes from Seattle to Australia.

Search flight deals

Frequently asked questions about flying from Seattle 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 May 2026, 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
Alaska Airlines	PriceFrom $97	Free Cancellation	Rating 7.9 12,327 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $385	Free Cancellation	Rating 7.1 10,998 reviews	Search Air Canada flights
ANA	PriceFrom $583	Free Cancellation	Rating 8.3 1,205 reviews	Search ANA flights
Qantas Airways	PriceFrom $647	Free Cancellation	Rating 7.5 1,030 reviews	Search Qantas Airways flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.1 11,669 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $813	Free Cancellation	Rating 7.8 2,837 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $831	Free Cancellation	Rating 7.4 9,682 reviews	Search United Airlines flights
Delta	PriceFrom $842	Free Cancellation	Rating 7.9 8,459 reviews	Search Delta flights
Air New Zealand	PriceFrom $947	Free Cancellation	Rating 8.0 640 reviews	Search Air New Zealand flights
Alaska Airlines	PriceFrom $1,126	Free Cancellation	Rating 0.0	Search Alaska 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.