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$581+ Cheap flights from Seattle (SEA) to Australia

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
jun. 11 — jun. 181
jue. 6/11
jue. 6/18
1 adult, Economy
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Cheap flight deals from Seattle to Australia

Cheapest flights from Seattle to Australia
Explore the most affordable flight options available from Seattle to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on mayo 12, 2026.

This Gurufare deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/174:20 pm
SEA
-
OOL
2 stops25h 00m
Multiple Airlines
lun. 11/2312:20 pm
OOL
-
SEA
2 stops23h 37m
Multiple Airlines
Deal found 5/8$1,006
This BusinessClass deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/116:10 pm
SEA
-
OOL
2 stops24h 20m
Multiple Airlines
jue. 8/2012:30 pm
OOL
-
SEA
2 stops25h 12m
Multiple Airlines
Deal found 5/10$1,007
This Trip.com deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 5/1010:45 am
SEA
-
SYD
1 stop27h 35m
Air Canada
dom. 5/249:20 am
SYD
-
SEA
1 stop30h 20m
Air Canada
Deal found 5/9$1,017
This oojo deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/115:10 pm
SEA
-
MEL
1 stop20h 35m
Qantas Airways
mié. 8/199:45 am
MEL
-
SEA
1 stop20h 54m
Qantas Airways
Deal found 5/11$1,044
This Air Canada deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 6/37:20 pm
SEA
-
SYD
1 stop19h 00m
Air Canada
dom. 6/79:20 am
SYD
-
SEA
1 stop26h 10m
Air Canada
Deal found 5/7$1,046
This KAYAK deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 6/310:45 am
SEA
-
SYD
2 stops39h 25m
ANA
lun. 6/158:55 pm
SYD
-
SEA
1 stop34h 30m
ANA
Deal found 5/7$1,054
This oojo deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/253:55 pm
SEA
-
MEL
1 stop21h 50m
Qantas Airways
vie. 10/239:45 am
MEL
-
SEA
1 stop20h 31m
Qantas Airways
Deal found 5/7$1,057
This Justfly.com deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 6/75:45 am
SEA
-
SYD
1 stop32h 35m
Air Canada
mié. 7/89:20 am
SYD
-
SEA
1 stop17h 47m
Air Canada
Deal found 5/10$1,057
This KAYAK deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 6/77:20 pm
SEA
-
SYD
1 stop19h 00m
Multiple Airlines
dom. 6/149:20 am
SYD
-
SEA
1 stop30h 20m
Multiple Airlines
Deal found 5/10$1,063
This KAYAK deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 5/247:20 pm
SEA
-
SYD
1 stop19h 00m
Singapore Airlines
dom. 6/149:20 am
SYD
-
SEA
1 stop30h 20m
Singapore Airlines
Deal found 5/9$1,066
This Air Canada deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/283:00 pm
SEA
-
SYD
1 stop23h 20m
Multiple Airlines
mar. 8/116:00 am
SYD
-
SEA
2 stops21h 07m
Multiple Airlines
Deal found 5/11$1,067
This Air Canada deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 5/1010:45 am
SEA
-
SYD
1 stop27h 35m
Multiple Airlines
dom. 5/246:00 am
SYD
-
SEA
2 stops21h 05m
Multiple Airlines
Deal found 5/9$1,068

Find flight deals from Seattle to Australia

Keep the following information in mind while searching for Seattle to Australia flight deals. Data was last updated mayo 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,007
(BusinessClass)

One-way from

$581
(SmartFares)

Popular in

December

Cheapest in

August

Average price

$1,051
Provider with most accurate pricing for Seattle/Tacoma Intl-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Sydney Kingsford Smith flights.
Search Deals
From Seattle/Tacoma Intl to Australia
Search Deals
One-way flight from Seattle/Tacoma Intl to Australia
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($221 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($52 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated mayo 12, 2026.
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

Cheapest round-trip
Quickest round-trip

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

jue. 8/13

7:35 pm-8:15 am

1 stop19h 40m

Melbourne

jue. 8/27

10:55 am-12:23 pm

1 stop18h 28m

$1,094

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

sáb. 8/15

3:30 pm-8:15 am

1 stop23h 45m

Melbourne

dom. 8/30

9:30 am-9:15 pm

2 stops28h 45m

$1,094

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

mié. 8/12

3:30 pm-8:15 am

1 stop23h 45m

Melbourne

lun. 8/31

10:55 am-12:20 pm

1 stop18h 25m

$1,094

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

sáb. 8/15

5:20 pm-8:15 am

1 stop21h 55m

Melbourne

mar. 9/1

10:55 am-2:24 pm

1 stop20h 29m

$1,094

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

lun. 6/1

10:52 am-7:30 am

2 stops27h 38m

Melbourne

lun. 6/15

10:55 am-4:20 pm

1 stop22h 25m

$1,098

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

lun. 7/27

7:00 am-7:30 am

2 stops31h 30m

Melbourne

jue. 8/6

10:55 am-12:34 pm

1 stop18h 39m

$1,098

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

jue. 6/11

5:00 am-8:15 am

2 stops34h 15m

Melbourne

dom. 6/21

9:30 am-2:39 pm

1 stop22h 09m

$1,098

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

lun. 10/5

1:30 pm-8:50 am

2 stops25h 20m

Melbourne

mar. 10/13

11:00 am-12:11 am

2 stops31h 11m

$1,106

SeattleMelbourne

SEA - MEL

SEAMEL

Seattle/Tacoma Intl

mar. 10/13

9:25 pm-8:50 am

1 stop41h 25m

Melbourne

lun. 10/26

11:00 am-4:59 pm

1 stop23h 59m

$1,109

SeattleBrisbane

SEA - BNE

SEABNE

Seattle/Tacoma Intl

lun. 5/25

7:35 am-11:25 pm

2 stops22h 50m

Brisbane

mar. 6/2

9:50 am-11:59 pm

2 stops31h 09m

$1,214

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/11

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Seattle to Australia

Have a flexible travel schedule? Discover the best time to fly to Australia from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Australia

How far ahead should I book a flight from Seattle to Australia?

Booking 23 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Australia. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Seattle to Australia?

Currently, January is the cheapest month in which you can book a flight from Seattle to Australia (average of $97). Flying from Seattle to Australia in March is currently the most expensive (average of $778). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Australia

Get insights into the airlines that provide service to Australia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Australia. Reviews last updated mayo 12, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines,Delta, andQantas Airways from Seattle to Australia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,354 reviews

Comfort

7.8

Crew

8.5

Overall

7.9

Entertainment

7.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Alaska Airlines
7.9
Good
12,354 reviews
Alaska Airlines
7.9
Good
12,354 reviews

Comfort

7.8

Crew

8.5

Overall

7.9

Entertainment

7.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Delta
7.9
Good
8,449 reviews
Alaska Airlines
7.9
Good
12,354 reviews

Comfort

7.8

Crew

8.5

Overall

7.9

Entertainment

7.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Qantas Airways
7.5
Good
1,035 reviews
Alaska Airlines
7.9
Good
12,354 reviews

Comfort

7.8

Crew

8.5

Overall

7.9

Entertainment

7.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
United Airlines
7.4
Good
9,702 reviews
Alaska Airlines
7.9
Good
12,354 reviews

Comfort

7.8

Crew

8.5

Overall

7.9

Entertainment

7.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Air Canada
7.1
Good
11,019 reviews
Alaska Airlines
7.9
Good
12,354 reviews

Comfort

7.8

Crew

8.5

Overall

7.9

Entertainment

7.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to Australia?

    If you book a flight to Australia from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle.

  • How long is the flight from Seattle to Australia?

    United Airlines, Qatar Airways, and Singapore Airlines can get you from Seattle to Australia in just under 19h 40m. Your travel time can differ by up to 15h 30m. The distance from Seattle to Australia is about 8180 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Seattle to Australia one-way?

    $253 is the cheapest one-way deal found within the past few days, from ANA. You may also be able to find cheap deals on Air Canada and Qantas Airways, with prices starting from $366 and $380, respectively.

  • What are the most popular routes from Seattle to Australia?

    The most popular flight routes from Seattle to Australia are Seattle/Tacoma Intl - Melbourne, Seattle/Tacoma Intl - Sydney Kingsford Smith and Seattle/Tacoma Intl - Melbourne Avalon.

  • Can I find deals for flights from Seattle to Australia that include hotel bookings?

    Yes. In addition to deals on Seattle to Australia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Australia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Australia.

  • Can I find deals for business class flights from Seattle to Australia?

    Yes. Cheapflights offers flight deals from Seattle to Australia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Australia?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Australia (average of $97). Flying from Seattle to Australia in March is currently the most expensive (average of $778). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 10 airlines flying from Seattle to Australia

Discover the top 10 airlines that operate flights from Seattle to Australia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated mayo 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$97Average$1,398FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$385Average$1,106FlexibilityNo cancel feeOn-time67%
ANACheapest$583Average$655FlexibilityNo cancel feeOn-time80%
Qantas AirwaysCheapest$647Average$1,260FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$804Average$1,011FlexibilityNo cancel feeOn-time71%
Hawaiian AirlinesCheapest$813Average$1,153FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$831Average$1,340FlexibilityNo cancel feeOn-time69%
DeltaCheapest$842Average$1,376FlexibilityNo cancel feeOn-timeN/A
Air New ZealandCheapest$1,116Average$1,877FlexibilityNo cancel feeOn-time78%
Alaska AirlinesCheapest$1,126Average$1,237FlexibilityNo cancel feeOn-timeN/A

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