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Cheap flights from Seattle to Australia from $367

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 11/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Air Canada Logo
7:15 pm - 8:20 amSEA-SYD
19h 05m1 stop
Air Canada Logo
10:20 am - 7:16 pmSYD-SEA
26h 56m1 stop
$710Air Canada
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Sun, Oct 19 - Sun, Oct 26
Air Canada Logo
7:15 pm - 8:20 amSEA-SYD
19h 05m1 stop
Air Canada Logo
8:00 am - 2:26 pmSYD-SEA
24h 26m2 stops
$725Air Canada
Find Deal
Sun, Oct 19 - Sun, Oct 26
Qantas Airways Logo
2:42 pm - 8:05 amSEA-SYD
23h 23m1 stop
Qantas Airways Logo
11:15 am - 1:02 pmSYD-SEA
20h 47m1 stop
$803Qantas Airways
Find Deal
Mon, Oct 20 - Tue, Nov 4
Qantas Airways Logo
3:23 pm - 7:05 amSEA-SYD
22h 42m1 stop
Qantas Airways Logo
5:45 pm - 9:58 pmSYD-SEA
21h 13m1 stop
$804Qantas Airways
Find Deal
Mon, Sep 8 - Fri, Sep 19
Delta Logo
5:59 pm - 8:30 amSEA-SYD
19h 31m1 stop
Delta Logo
10:40 am - 2:45 pmSYD-SEA
23h 05m1 stop
$843Delta
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Mon, Feb 9 - Sun, Feb 22
Delta Logo
9:20 pm - 6:35 amSEA-SYD
40h 15m2 stops
Delta Logo
10:25 am - 4:54 pmSYD-SEA
24h 29m1 stop
$847Delta
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Fri, Sep 26 - Thu, Oct 9
United Airlines Logo
5:20 pm - 1:20 pmSEA-OOL
26h 00m2 stops
United Airlines Logo
7:20 am - 9:13 pmOOL-SEA
31h 53m3 stops
$1,117United Airlines
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Tue, Nov 4 - Sat, Nov 22
United Airlines Logo
2:41 pm - 6:00 pmSEA-CBR
32h 19m2 stops
United Airlines Logo
6:35 am - 11:39 amCBR-SEA
24h 04m2 stops
$1,141United Airlines
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Sat, Nov 22 - Sun, Nov 30
Singapore Airlines Logo
10:15 am - 12:30 pmSEA-PER
35h 15m1 stop
Singapore Airlines Logo
5:10 pm - 8:45 amPER-SEA
30h 35m1 stop
$1,428Singapore Airlines
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Sat, Sep 27 - Sat, Oct 4
Singapore Airlines Logo
8:45 am - 2:45 pmSEA-PER
38h 00m1 stop
Singapore Airlines Logo
5:05 pm - 1:52 pmPER-SEA
36h 47m2 stops
$1,541Singapore Airlines
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Fri, Dec 26 - Tue, Jan 13

Air Canada flights from Seattle to Australia

Our best Air Canada deals on Seattle to Australia flight tickets
Air Canada
Oct 19
SEA7:15 pmSeattle/Tacoma Intl
19h 05m
1 stop
SYD8:20 amSydney Kingsford Smith
Oct 26
SYD10:20 amSydney Kingsford Smith
26h 56m
1 stop
SEA7:16 pmSeattle/Tacoma Intl
$710
Find similar
Air Canada
Oct 19
SEA7:15 pmSeattle/Tacoma Intl
19h 05m
1 stop
SYD8:20 amSydney Kingsford Smith
Oct 26
SYD8:00 amSydney Kingsford Smith
24h 26m
2 stops
SEA2:26 pmSeattle/Tacoma Intl
$725
Find similar
Air Canada
Oct 27
SEA3:40 pmSeattle/Tacoma Intl
27h 00m
2 stops
SYD12:40 pmSydney Kingsford Smith
Nov 9
SYD11:20 amSydney Kingsford Smith
26h 56m
1 stop
SEA7:16 pmSeattle/Tacoma Intl
$729
Find similar

American Airlines flights from Seattle to Australia

Our best American Airlines deals on Seattle to Australia flight tickets
American Airlines
Sep 26
SEA3:23 pmSeattle/Tacoma Intl
22h 42m
1 stop
SYD7:05 amSydney Kingsford Smith
Oct 9
SYD10:10 amSydney Kingsford Smith
22h 49m
2 stops
SEA2:59 pmSeattle/Tacoma Intl
$818
Find similar
American Airlines
Sep 21
SEA11:44 amSeattle/Tacoma Intl
26h 21m
2 stops
SYD7:05 amSydney Kingsford Smith
Oct 4
SYD5:45 pmSydney Kingsford Smith
21h 13m
1 stop
SEA9:58 pmSeattle/Tacoma Intl
$819
Find similar
American Airlines
Aug 24
SEA2:32 pmSeattle/Tacoma Intl
23h 58m
1 stop
SYD7:30 amSydney Kingsford Smith
Sep 12
SYD5:45 pmSydney Kingsford Smith
21h 13m
1 stop
SEA9:58 pmSeattle/Tacoma Intl
$827
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momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated August 14, 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

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 10/19

7:15 pm-8:20 am

1 stop19h 05m

Sydney Kingsford Smith

Sun 10/26

10:20 am-7:16 pm

1 stop26h 56m

$710

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 10/19

7:15 pm-8:20 am

1 stop19h 05m

Sydney Kingsford Smith

Sun 10/26

8:00 am-2:26 pm

2 stops24h 26m

$725

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 10/20

2:42 pm-8:05 am

1 stop23h 23m

Sydney Kingsford Smith

Tue 11/4

11:15 am-1:02 pm

1 stop20h 47m

$803

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 9/8

3:23 pm-7:05 am

1 stop22h 42m

Sydney Kingsford Smith

Fri 9/19

5:45 pm-9:58 pm

1 stop21h 13m

$804

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 2/9

5:59 pm-8:30 am

1 stop19h 31m

Sydney Kingsford Smith

Sun 2/22

10:40 am-2:45 pm

1 stop23h 05m

$843

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Fri 9/26

9:20 pm-6:35 am

2 stops40h 15m

Sydney Kingsford Smith

Thu 10/9

10:25 am-4:54 pm

1 stop24h 29m

$847

SeattleCoolangatta

SEA - OOL

SEAOOL

Seattle/Tacoma Intl

Tue 11/4

5:20 pm-1:20 pm

2 stops26h 00m

Coolangatta Gold Coast

Sat 11/22

7:20 am-9:13 pm

3 stops31h 53m

$1,117

SeattleCanberra

SEA - CBR

SEACBR

Seattle/Tacoma Intl

Sat 11/22

2:41 pm-6:00 pm

2 stops32h 19m

Canberra

Sun 11/30

6:35 am-11:39 am

2 stops24h 04m

$1,141

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sat 9/27

10:15 am-12:30 pm

1 stop35h 15m

Perth

Sat 10/4

5:10 pm-8:45 am

1 stop30h 35m

$1,428

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Fri 12/26

8:45 am-2:45 pm

1 stop38h 00m

Perth

Tue 1/13

5:05 pm-1:52 pm

2 stops36h 47m

$1,541

Flights are sorted by cheapest round-trip 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?

The month of February is, on average, the cheapest month to fly to Australia from Seattle, with most prices found around $991. If you aren’t able to travel during the month of February, then book flights to Australia from Seattle during March instead. Flights to Australia in March, while not as cheap as those in February, still average around $1,035.

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 $1,119 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 $977 on momondo.

Can stopping save me money on Seattle to Australia flights?

You could potentially save up to 1% 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

Best Price Found

$367

Fastest flight time

17h 53m

Direct flights

None

Airports in Australia

6 airports
The best one-way flight to Australia from Seattle in the past 72 hours is $367. The best round-trip flight deal from Seattle to Australia found on momondo in the last 72 hours is $710.
The fastest flight from Seattle to Australia takes 17h 53m
There are no direct flights from Seattle to Australia. Popular non-direct routes for this connection are Seattle/Tacoma Intl Airport - Melbourne Airport, Seattle/Tacoma Intl Airport - Sydney Kingsford Smith Airport and Seattle/Tacoma Intl Airport - Canberra Airport.
There are 6 airports near Australia: Canberra (CBR), Melbourne (MEL), Brisbane (BNE), Cairns (CNS), Perth (PER), Sydney Kingsford Smith (SYD)
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  • 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?

  • 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 AirlinesPriceFrom $591Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
Qantas AirwaysPriceFrom $647Free CancellationRating
7.5
895 reviews
Search Qantas Airways flights
ANAPriceFrom $794Free CancellationRating
8.4
933 reviews
Search ANA flights
American AirlinesPriceFrom $807Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Air CanadaPriceFrom $821Free CancellationRating
7.1
9,949 reviews
Search Air Canada flights
United AirlinesPriceFrom $841Free CancellationRating
7.4
8,916 reviews
Search United Airlines flights
Hawaiian AirlinesPriceFrom $858Free CancellationRating
7.8
2,656 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $862Free CancellationRating
8.0
7,980 reviews
Search Delta flights
Singapore AirlinesPriceFrom $1,218Free CancellationRating
8.1
1,346 reviews
Search Singapore Airlines flights
Qatar AirwaysPriceFrom $1,315Free CancellationRating
7.4
3,608 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.

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Find better results for your trip to Australia

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