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Cheap flights from Seattle to Australia from $585

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Australia departing on 18/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Cheap return flights

Enter your travel dates to find the best prices.
Air Canada Logo
05:50 - 08:45SEA-BNE
32h 55m1 stop
Air Canada Logo
10:45 - 22:06BNE-SEA
29h 21m1 stop
$1,211Air Canada
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Sun, 11 Jan - Sat, 24 Jan
Air Canada Logo
15:40 - 08:45SEA-BNE
23h 05m1 stop
Air Canada Logo
10:45 - 09:31BNE-SEA
16h 46m1 stop
$1,215Air Canada
Find Deal
Mon, 2 Feb - Mon, 16 Feb
Multiple Airlines Logo
20:00 - 13:25SEA-BNE
23h 25m2 stops
Multiple Airlines Logo
09:45 - 19:16BNE-SEA
26h 31m1 stop
$1,251Multiple Airlines
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Wed, 4 Mar - Wed, 18 Mar
Multiple Airlines Logo
10:05 - 08:45SEA-BNE
28h 40m1 stop
Multiple Airlines Logo
19:40 - 20:35BNE-SEA
18h 55m1 stop
$1,270Multiple Airlines
Find Deal
Fri, 5 Dec - Mon, 8 Dec
Singapore Airlines Logo
08:45 - 12:35SEA-PER
35h 50m1 stop
Singapore Airlines Logo
01:15 - 08:10PER-SEA
21h 55m1 stop
$1,698Singapore Airlines
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Thu, 19 Feb - Wed, 11 Mar
Singapore Airlines Logo
08:45 - 12:35SEA-PER
35h 50m1 stop
Singapore Airlines Logo
17:05 - 08:10PER-SEA
30h 05m1 stop
$1,748Singapore Airlines
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Thu, 19 Feb - Thu, 12 Mar
Qantas Airways Logo
15:57 - 10:55SEA-ADL
24h 28m2 stops
Qantas Airways Logo
16:10 - 19:58ADL-SEA
22h 18m2 stops
$1,748Qantas Airways
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Tue, 13 Jan - Sat, 28 Feb
Qantas Airways Logo
17:53 - 18:15SEA-HBA
29h 22m2 stops
Qantas Airways Logo
14:35 - 20:52HBA-SEA
25h 17m2 stops
$2,061Qantas Airways
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Wed, 7 Jan - Wed, 14 Jan
United Airlines Logo
17:10 - 16:20SEA-ADL
28h 40m2 stops
United Airlines Logo
14:55 - 15:41ADL-SEA
19h 16m1 stop
$2,706United Airlines
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Tue, 13 Jan - Sat, 28 Feb
United Airlines Logo
12:55 - 09:30SEA-ADL
26h 05m2 stops
United Airlines Logo
14:55 - 18:26ADL-SEA
22h 01m1 stop
$2,771United Airlines
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Sat, 28 Feb - Wed, 4 Mar

ANA flights from Seattle to Australia

Our best ANA deals on Seattle to Australia flight tickets
ANA
3 Mar
SEA15:45Seattle/Tacoma Intl
23h 45m
1 stop
SYD10:30Sydney Kingsford Smith
10 Mar
SYD21:45Sydney Kingsford Smith
34h 35m
1 stop
SEA14:20Seattle/Tacoma Intl
$1,415
Find similar
ANA
3 Mar
SEA15:45Seattle/Tacoma Intl
33h 30m
1 stop
SYD20:15Sydney Kingsford Smith
10 Mar
SYD21:45Sydney Kingsford Smith
41h 13m
2 stops
SEA20:58Seattle/Tacoma Intl
$1,421
Find similar
ANA
30 Nov
SEA15:40Seattle/Tacoma Intl
36h 30m
1 stop
PER20:10Perth
30 Jan
PER21:55Perth
31h 25m
1 stop
SEA13:20Seattle/Tacoma Intl
$2,994
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Air Canada flights from Seattle to Australia

Our best Air Canada deals on Seattle to Australia flight tickets
Air Canada
2 Feb
SEA15:40Seattle/Tacoma Intl
23h 05m
1 stop
BNE08:45Brisbane
16 Feb
BNE10:45Brisbane
16h 46m
1 stop
SEA09:31Seattle/Tacoma Intl
$1,215
Find similar
Air Canada
10 Feb
SEA15:40Seattle/Tacoma Intl
23h 05m
1 stop
BNE08:45Brisbane
27 Feb
BNE10:45Brisbane
21h 46m
1 stop
SEA14:31Seattle/Tacoma Intl
$1,223
Find similar
Air Canada
6 Dec
SEA15:40Seattle/Tacoma Intl
23h 05m
1 stop
BNE08:45Brisbane
15 Jan
BNE10:45Brisbane
29h 21m
1 stop
SEA22:06Seattle/Tacoma Intl
$1,318
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momondo Fare Finder

 
Customise your flight search to find flights from Seattle to Australia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 78,305 searches. Data last updated 24 November 2025.
Use the filters below to find and compare flights from Seattle to Australia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Sun 11/1

05:50-08:45

1 stop32h 55m

Brisbane

Sat 24/1

10:45-22:06

1 stop29h 21m

$1,211

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Mon 2/2

15:40-08:45

1 stop23h 05m

Brisbane

Mon 16/2

10:45-09:31

1 stop16h 46m

$1,215

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Wed 4/3

20:00-13:25

2 stops23h 25m

Brisbane

Wed 18/3

09:45-19:16

1 stop26h 31m

$1,251

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Fri 5/12

10:05-08:45

1 stop28h 40m

Brisbane

Mon 8/12

19:40-20:35

1 stop18h 55m

$1,270

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Thu 19/2

08:45-12:35

1 stop35h 50m

Perth

Wed 11/3

01:15-08:10

1 stop21h 55m

$1,698

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Thu 19/2

08:45-12:35

1 stop35h 50m

Perth

Thu 12/3

17:05-08:10

1 stop30h 05m

$1,748

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 13/1

15:57-10:55

2 stops24h 28m

Adelaide

Sat 28/2

16:10-19:58

2 stops22h 18m

$1,748

SeattleHobart

SEA - HBA

SEAHBA

Seattle/Tacoma Intl

Wed 7/1

17:53-18:15

2 stops29h 22m

Hobart

Wed 14/1

14:35-20:52

2 stops25h 17m

$2,061

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 13/1

17:10-16:20

2 stops28h 40m

Adelaide

Sat 28/2

14:55-15:41

1 stop19h 16m

$2,706

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 28/2

12:55-09:30

2 stops26h 05m

Adelaide

Wed 4/3

14:55-18:26

1 stop22h 01m

$2,771

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Australia from

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

What is the cheapest month to fly to Australia?

In general, August is the cheapest month to fly from Seattle to Australia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,310. If you don’t want to visit Australia in August, then you should wait until September to fly from Seattle, when ticket prices are also cheap, with an average price of $1,386.

What is the cheapest day to depart on your flight to Australia?

On average, the least expensive day to fly to Australia from Seattle is on a Monday. momondo users have found tickets for Monday departures for as low as $1,497. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Seattle to Australia on a Saturday will generally be more expensive and average around $1,809. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Australia?

According to our data, the cheapest time of day to fly to Australia is in the afternoon. momondo users have found flights departing from Seattle to Australia in the afternoon for as low as $1,429. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Australia are more costly in the morning, with an average ticket price of $1,754. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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 $1,644 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Australia from Seattle for as low as $1,347 on momondo.

Can stopping save me money on Seattle to Australia flights?

You could potentially save up to 16% 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

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 were last updated today.

  • How many operators does momondo search 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?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. 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 necessary travel and health documents for your Australia trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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
United AirlinesPriceFrom $1,237Free cancellationRating
7.4
9,044 reviews
Search United Airlines flights
Air CanadaPriceFrom $1,301Free cancellationRating
7.1
10,469 reviews
Search Air Canada flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Australia?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Australia for you.

Can I find flights from Seattle to Australia with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Seattle to Australia flights to just show those with flexible booking policies.

How can momondo help me find flights from Seattle to Australia?

Once all potential Seattle to Australia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Seattle to Australia right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seattle to Australia now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Australia and let you know when they change.

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