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New South Wales

$388+ Cheap flights from Seattle (SEA) to New South Wales

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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
Apr 6 — Apr 131
Mon 4/6
Mon 4/13
1 adult, Economy
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Cheap flight deals from Seattle to New South Wales

Cheapest flights from Seattle to New South Wales
Explore the most affordable flight options available from Seattle to New South Wales. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 7, 2026.

This Trip.com deal was found by Cheapflights users on 3/2. 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.
Sun 8/1611:10 pm
SEA
-
SYD
1 stop39h 50m
Philippine Airlines
Tue 9/110:15 am
SYD
-
SEA
1 stop26h 50m
Philippine Airlines
Deal found 3/2$701
This Trip.com deal was found by Cheapflights users on 3/2. 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.
Thu 9/1011:10 pm
SEA
-
SYD
1 stop39h 50m
Philippine Airlines
Tue 10/611:15 am
SYD
-
SEA
1 stop26h 50m
Philippine Airlines
Deal found 3/2$702
This Gotogate deal was found by Cheapflights users on 3/4. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/34:30 pm
SEA
-
SYD
1 stop33h 40m
Multiple Airlines
Wed 6/1711:45 am
SYD
-
SEA
2 stops27h 35m
Multiple Airlines
Deal found 3/4$710
This oojo deal was found by Cheapflights users on 3/3. 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.
Tue 8/1811:10 pm
SEA
-
SYD
1 stop39h 50m
Philippine Airlines
Tue 9/810:15 am
SYD
-
SEA
1 stop26h 50m
Philippine Airlines
Deal found 3/3$716
This oojo deal was found by Cheapflights users on 3/3. 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.
Wed 9/211:10 pm
SEA
-
SYD
1 stop39h 50m
Philippine Airlines
Tue 9/1510:15 am
SYD
-
SEA
1 stop26h 50m
Philippine Airlines
Deal found 3/3$717
This KAYAK deal was found by Cheapflights users on 3/5. 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.
Thu 9/311:10 pm
SEA
-
SYD
1 stop39h 50m
Philippine Airlines
Thu 9/1710:15 am
SYD
-
SEA
1 stop26h 50m
Philippine Airlines
Deal found 3/5$749
This Trip.com deal was found by Cheapflights users on 3/2. 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.
Fri 9/1111:10 pm
SEA
-
SYD
1 stop39h 50m
Philippine Airlines
Thu 9/1710:15 am
SYD
-
SEA
1 stop26h 50m
Philippine Airlines
Deal found 3/2$762
This Trip.com deal was found by Cheapflights users on 3/6. 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.
Wed 6/34:30 pm
SEA
-
SYD
1 stop33h 40m
ANA
Wed 6/178:55 pm
SYD
-
SEA
1 stop34h 30m
ANA
Deal found 3/6$799
This KAYAK deal was found by Cheapflights users on 3/5. 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.
Fri 9/411:10 pm
SEA
-
SYD
1 stop39h 50m
Philippine Airlines
Thu 9/1710:15 am
SYD
-
SEA
1 stop26h 50m
Philippine Airlines
Deal found 3/5$818
This Air New Zealand deal was found by Cheapflights users on 3/5. 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 New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/208:42 am
SEA
-
OOL
2 stops33h 03m
Multiple Airlines
Mon 4/2711:55 am
OOL
-
SEA
2 stops24h 51m
Multiple Airlines
Deal found 3/5$1,192
This Qantas Airways deal was found by Cheapflights users on 3/6. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/255:06 pm
SEA
-
NTL
2 stops34h 39m
Qantas Airways
Wed 4/296:15 am
NTL
-
SEA
2 stops30h 38m
Qantas Airways
Deal found 3/6$1,375
This Air Canada deal was found by Cheapflights users on 3/3. 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.
Fri 4/178:00 pm
SEA
-
OOL
2 stops22h 40m
Multiple Airlines
Fri 4/246:00 am
OOL
-
SEA
2 stops30h 20m
Multiple Airlines
Deal found 3/3$1,382

Find flight deals from Seattle to New South Wales

Keep the following information in mind while searching for Seattle to New South Wales flight deals. Data was last updated March 7, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$710
(Gotogate)

One-way from

$388
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$999
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 New South Wales
Search Deals
One-way flight from Seattle/Tacoma Intl to New South Wales
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($184 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($46 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to New South Wales 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 March 7, 2026.
Use the filters below to find and compare flights from Seattle to New South Wales that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 6/3

10:30 am-7:10 pm

2 stops39h 40m

Sydney Kingsford Smith

Wed 6/17

8:55 pm-2:25 pm

1 stop34h 30m

$894

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 4/30

12:51 pm-7:00 am

2 stops25h 09m

Sydney Kingsford Smith

Tue 5/19

9:30 am-9:06 pm

2 stops28h 36m

$951

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 6/3

12:50 pm-7:00 am

2 stops25h 10m

Sydney Kingsford Smith

Wed 6/17

9:30 am-5:59 pm

2 stops25h 29m

$956

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 4/18

5:45 pm-6:55 am

1 stop20h 10m

Sydney Kingsford Smith

Mon 5/11

9:30 am-9:06 pm

2 stops28h 36m

$996

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 5/7

9:25 am-6:50 am

2 stops28h 25m

Sydney Kingsford Smith

Mon 5/25

9:15 am-12:12 am

2 stops31h 57m

$997

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 4/18

11:10 am-6:50 am

2 stops26h 40m

Sydney Kingsford Smith

Mon 5/11

9:15 am-3:23 pm

2 stops23h 08m

$997

SeattleCoolangatta

SEA - OOL

SEAOOL

Seattle/Tacoma Intl

Mon 4/20

8:42 am-10:45 am

2 stops33h 03m

Coolangatta Gold Coast

Mon 4/27

11:55 am-7:46 pm

2 stops24h 51m

$1,192

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 6/4

2:36 pm-7:00 am

2 stops23h 24m

Sydney Kingsford Smith

Thu 6/18

9:30 am-5:59 pm

2 stops25h 29m

$1,249

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 4/4

5:45 pm-6:55 am

1 stop20h 10m

Sydney Kingsford Smith

Thu 4/9

9:30 am-9:06 pm

2 stops28h 36m

$1,269

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 4/18

3:48 pm-7:00 am

2 stops46h 12m

Sydney Kingsford Smith

Sat 4/25

9:30 am-11:27 pm

3 stops30h 57m

$1,289

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/3

Showing 1-10 of 35 resultsSorted by cheapest first
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Best time to book a flight from Seattle to New South Wales

Have a flexible travel schedule? Discover the best time to fly to New South Wales 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 New South Wales

What is the cheapest month to book a flight from Seattle to New South Wales?

Currently, February is the cheapest month in which you can book a flight from Seattle to New South Wales (average of $582). Flying from Seattle to New South Wales in December is currently the most expensive (average of $845). 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 New South Wales

Get insights into the airlines that provide service to New South Wales. 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 New South Wales. Reviews last updated March 7, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and Qantas Airways from Seattle to New South Wales to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,992 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Entertainment

7.0

Food

7.1

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
8.0
Very good
11,992 reviews
Alaska Airlines
8.0
Very good
11,992 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Entertainment

7.0

Food

7.1

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
8,270 reviews
Alaska Airlines
8.0
Very good
11,992 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Entertainment

7.0

Food

7.1

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
1,002 reviews
Alaska Airlines
8.0
Very good
11,992 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Entertainment

7.0

Food

7.1

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
9,404 reviews
Alaska Airlines
8.0
Very good
11,992 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Entertainment

7.0

Food

7.1

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
10,790 reviews
Alaska Airlines
8.0
Very good
11,992 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Entertainment

7.0

Food

7.1

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 New South Wales. 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 New South Wales?

    For a flight from Seattle to New South Wales, you will be flying from Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city.

  • How long is the flight from Seattle to New South Wales?

    There are many flights that can get you from Seattle to New South Wales in 25h 09m. Fly via ANA, United Airlines, or Delta to get the fastest option. The distance between Seattle and New South Wales is about 7744 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Seattle to New South Wales one-way?

    The cheapest airline one-way is ANA, with whom users have recently found tickets for as low as $253. However, be on the lookout for offers from Air Canada and Qantas Airways, as they are both options that can get you from Seattle to New South Wales for a low price.

  • What are the most popular routes from Seattle to New South Wales?

    The most popular flight routes from Seattle to New South Wales are Seattle/Tacoma Intl - Sydney Kingsford Smith, Seattle/Tacoma Intl - Newcastle Williamtown and Seattle/Tacoma Intl - Coolangatta Gold Coast.

  • Can I find deals for flights from Seattle to New South Wales that include hotel bookings?

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

  • How can I find direct flights from Seattle to New South Wales?

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

  • Can I find deals for business class flights from Seattle to New South Wales?

    Yes. Cheapflights offers flight deals from Seattle to New South Wales 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 New South Wales?

    Currently, February is the cheapest month in which you can book a flight from Seattle to New South Wales (average of $582). Flying from Seattle to New South Wales in December is currently the most expensive (average of $845). 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 9 airlines flying from Seattle to New South Wales

Discover the top 9 airlines that operate flights from Seattle to New South Wales. 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 March 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
ANACheapest$583Average$655FlexibilityNo cancel feeOn-time80%
Alaska AirlinesCheapest$591Average$1,188FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$779Average$1,063FlexibilityNo cancel feeOn-time67%
Qantas AirwaysCheapest$786Average$892FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$804Average$1,033FlexibilityNo cancel feeOn-time71%
Hawaiian AirlinesCheapest$812Average$1,156FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$833Average$1,116FlexibilityNo cancel feeOn-time69%
DeltaCheapest$842Average$1,275FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$1,126Average$1,268FlexibilityNo cancel feeOn-timeN/A

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