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Cheap flights from Seattle to Australia from $440

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 11/29. 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
0 bags

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Find the cheapest flights from Seattle to Australia

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
10:05 am - 8:45 amSEA-BNE
28h 40m1 stop
Air Canada Logo
10:45 am - 9:31 amBNE-SEA
16h 46m1 stop
$783Air Canada
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Sun, Feb 15 - Wed, Feb 25
Air Canada Logo
3:40 pm - 8:45 amSEA-BNE
23h 05m1 stop
Air Canada Logo
10:45 am - 9:31 amBNE-SEA
16h 46m1 stop
$785Air Canada
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Mon, Feb 2 - Mon, Feb 16
ANA Logo
4:30 pm - 7:15 pmSEA-SYD
33h 45m1 stop
ANA Logo
11:50 am - 6:36 pmSYD-SEA
23h 46m2 stops
$900ANA
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Mon, May 11 - Mon, May 25
ANA Logo
4:30 pm - 9:25 amSEA-SYD
23h 55m1 stop
ANA Logo
8:55 pm - 2:25 pmSYD-SEA
34h 30m1 stop
$914ANA
Find Deal
Mon, May 11 - Mon, May 25
Qantas Airways Logo
5:53 pm - 9:30 amSEA-MEL
20h 37m1 stop
Qantas Airways Logo
6:20 pm - 8:34 pmMEL-SEA
21h 14m2 stops
$1,087Qantas Airways
Find Deal
Thu, Jan 22 - Tue, Feb 3
Qantas Airways Logo
3:45 pm - 10:20 amSEA-MEL
23h 35m2 stops
Qantas Airways Logo
12:00 pm - 6:05 pmMEL-SEA
25h 05m1 stop
$1,104Qantas Airways
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Sun, Jan 18 - Tue, Feb 3
United Airlines Logo
5:20 pm - 2:20 pmSEA-OOL
27h 00m2 stops
United Airlines Logo
7:20 am - 9:01 pmOOL-SEA
31h 41m3 stops
$1,674United Airlines
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Sun, Mar 1 - Wed, Mar 4
United Airlines Logo
6:04 pm - 9:10 pmSEA-HBA
32h 06m2 stops
United Airlines Logo
6:20 am - 9:01 pmHBA-SEA
33h 41m3 stops
$1,716United Airlines
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Sat, Feb 28 - Wed, Mar 4
Singapore Airlines Logo
8:45 am - 3:40 pmSEA-MCY
36h 55m2 stops
Singapore Airlines Logo
9:30 am - 7:10 amMCY-SEA
39h 40m2 stops
$1,977Singapore Airlines
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Sun, Mar 1 - Wed, Mar 4
Singapore Airlines Logo
8:45 am - 8:45 amSEA-MCY
54h 00m2 stops
Singapore Airlines Logo
4:20 pm - 7:10 amMCY-SEA
56h 50m2 stops
$2,027Singapore Airlines
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Sun, Mar 1 - Thu, Mar 5

Qantas Airways flights from Seattle to Australia

Our best Qantas Airways deals on Seattle to Australia flight tickets
Qantas Airways
Dec 31
SEA6:00 amSeattle/Tacoma Intl
32h 00m
1 stop
SYD9:00 amSydney Kingsford Smith
Feb 10
SYD7:05 amSydney Kingsford Smith
24h 24m
2 stops
SEA12:29 pmSeattle/Tacoma Intl
$987
Find similar
Qantas Airways
Feb 7
SEA6:00 amSeattle/Tacoma Intl
30h 25m
1 stop
SYD7:25 amSydney Kingsford Smith
Feb 14
SYD7:05 amSydney Kingsford Smith
28h 55m
2 stops
SEA5:00 pmSeattle/Tacoma Intl
$994
Find similar
Qantas Airways
Jan 22
SEA5:53 pmSeattle/Tacoma Intl
20h 37m
1 stop
MEL9:30 amMelbourne
Feb 3
MEL6:20 pmMelbourne
21h 14m
2 stops
SEA8:34 pmSeattle/Tacoma Intl
$1,087
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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 45m
1 stop
SYD7:15 pmSydney Kingsford Smith
May 25
SYD11:50 amSydney Kingsford Smith
23h 46m
2 stops
SEA6:36 pmSeattle/Tacoma Intl
$900
Find similar
ANA
May 11
SEA4:30 pmSeattle/Tacoma Intl
23h 55m
1 stop
SYD9:25 amSydney Kingsford Smith
May 25
SYD8:55 pmSydney Kingsford Smith
34h 30m
1 stop
SEA2:25 pmSeattle/Tacoma Intl
$914
Find similar
ANA
Mar 3
SEA3:45 pmSeattle/Tacoma Intl
23h 45m
1 stop
SYD10:30 amSydney Kingsford Smith
Mar 10
SYD12:25 pmSydney Kingsford Smith
26h 33m
2 stops
SEA8:58 pmSeattle/Tacoma Intl
$918
Find similar

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 November 26, 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 2/15

10:05 am-8:45 am

1 stop28h 40m

Brisbane

Wed 2/25

10:45 am-9:31 am

1 stop16h 46m

$783

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

Mon 2/2

3:40 pm-8:45 am

1 stop23h 05m

Brisbane

Mon 2/16

10:45 am-9:31 am

1 stop16h 46m

$785

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 5/11

4:30 pm-7:15 pm

1 stop33h 45m

Sydney Kingsford Smith

Mon 5/25

11:50 am-6:36 pm

2 stops23h 46m

$900

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 5/11

4:30 pm-9:25 am

1 stop23h 55m

Sydney Kingsford Smith

Mon 5/25

8:55 pm-2:25 pm

1 stop34h 30m

$914

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Thu 1/22

5:53 pm-9:30 am

1 stop20h 37m

Melbourne

Tue 2/3

6:20 pm-8:34 pm

2 stops21h 14m

$1,087

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

Sun 1/18

3:45 pm-10:20 am

2 stops23h 35m

Melbourne

Tue 2/3

12:00 pm-6:05 pm

1 stop25h 05m

$1,104

SeattleCoolangatta

SEA - OOL

SEAOOL

Seattle/Tacoma Intl

Sun 3/1

5:20 pm-2:20 pm

2 stops27h 00m

Coolangatta Gold Coast

Wed 3/4

7:20 am-9:01 pm

3 stops31h 41m

$1,674

SeattleHobart

SEA - HBA

SEAHBA

Seattle/Tacoma Intl

Sat 2/28

6:04 pm-9:10 pm

2 stops32h 06m

Hobart

Wed 3/4

6:20 am-9:01 pm

3 stops33h 41m

$1,716

SeattleMaroochydore

SEA - MCY

SEAMCY

Seattle/Tacoma Intl

Sun 3/1

8:45 am-3:40 pm

2 stops36h 55m

Maroochydore Sunshine Coast

Wed 3/4

9:30 am-7:10 am

2 stops39h 40m

$1,977

SeattleMaroochydore

SEA - MCY

SEAMCY

Seattle/Tacoma Intl

Sun 3/1

8:45 am-8:45 am

2 stops54h 00m

Maroochydore Sunshine Coast

Thu 3/5

4:20 pm-7:10 am

2 stops56h 50m

$2,027

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 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 $895.

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 $1,062 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 $870 on momondo.

Can stopping save me money on Seattle to Australia flights?

You could potentially save up to 29% 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 56m

Direct flights

None
The fastest flight from Seattle to Australia takes 17h 56m
There are no direct flights from Seattle to Australia. There are no popular flight routes from Seattle to Australia.
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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
ANAPriceFrom $583Free CancellationRating
8.4
1,010 reviews
Search ANA flights
Alaska AirlinesPriceFrom $591Free CancellationRating
8.0
11,354 reviews
Search Alaska Airlines flights
Philippine AirlinesPriceFrom $758Free CancellationRating
7.3
937 reviews
Search Philippine Airlines flights
Air CanadaPriceFrom $779Free CancellationRating
7.1
10,476 reviews
Search Air Canada flights
Qantas AirwaysPriceFrom $789Free CancellationRating
7.5
944 reviews
Search Qantas Airways flights
American AirlinesPriceFrom $804Free CancellationRating
7.2
11,038 reviews
Search American Airlines flights
Hawaiian AirlinesPriceFrom $820Free CancellationRating
7.8
2,814 reviews
Search Hawaiian Airlines flights
United AirlinesPriceFrom $831Free CancellationRating
7.4
9,046 reviews
Search United Airlines flights
DeltaPriceFrom $842Free CancellationRating
7.9
7,998 reviews
Search Delta flights
Singapore AirlinesPriceFrom $1,239Free CancellationRating
8.1
1,409 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.

An easier way to manage your Australia trip

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