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New South Wales

$366+ 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 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$814
(Air Canada)

One-way from

$366
(Air Canada)

Popular in

December

Cheapest in

February

Average price

$1,051
From Seattle/Tacoma Intl to New South Wales
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One-way flight from Seattle/Tacoma Intl to New South Wales
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Highest demand for flights based on searches. 11% potential increase in price ($148 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This Air Canada deal was found by Cheapflights users on 9/11. 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.
Sun 10/192:55 pmSEA - SYD
2 stops26h 45mAir Canada
Sun 10/267:00 amSYD - SEA
2 stops20h 31mAir Canada
Deal found 9/11$814
This American Airlines deal was found by Cheapflights users on 9/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/203:23 pmSEA - SYD
1 stop23h 07mAmerican Airlines
Wed 10/19:10 amSYD - SEA
1 stop22h 39mAmerican Airlines
Deal found 9/9$815
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/213:23 pmSEA - SYD
1 stop23h 07mAmerican Airlines
Sun 10/56:45 pmSYD - SEA
1 stop21h 13mAmerican Airlines
Deal found 9/10$816
This Flighttix deal was found by Cheapflights users on 9/9. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/257:44 amSEA - SYD
1 stop18h 01mHawaiian Airlines
Tue 10/289:40 pmSYD - SEA
1 stop19h 52mHawaiian Airlines
Deal found 9/9$819
This Orbitz deal was found by Cheapflights users on 9/11. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/88:00 pmSEA - SYD
2 stops23h 40mAir Canada
Sat 11/153:00 pmSYD - SEA
2 stops37h 31mAir Canada
Deal found 9/11$820
This FlightHub deal was found by Cheapflights users on 9/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/135:50 amSEA - SYD
2 stops41h 15mAir Canada
Thu 12/2511:20 amSYD - SEA
1 stop17h 11mAir Canada
Deal found 9/9$825
This Priceline deal was found by Cheapflights users on 9/11. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/164:59 pmSEA - SYD
1 stop21h 06mQantas Airways
Tue 9/239:10 amSYD - SEA
1 stop20h 44mQantas Airways
Deal found 9/11$826
This Alaska Airlines deal was found by Cheapflights users on 9/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/177:44 amSEA - SYD
1 stop18h 01mAlaska Airlines
Tue 11/49:40 pmSYD - SEA
2 stops20h 56mAlaska Airlines
Deal found 9/8$827
This Alaska Airlines deal was found by Cheapflights users on 9/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/56:59 pmSEA - SYD
2 stops29h 46mAlaska Airlines
Sat 11/159:40 pmSYD - SEA
1 stop20h 41mAlaska Airlines
Deal found 9/11$828
This Air Canada deal was found by Cheapflights users on 9/9. 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.
Sat 12/135:50 amSEA - SYD
1 stop30h 05mAir Canada
Tue 12/2311:20 amSYD - SEA
1 stop26h 56mAir Canada
Deal found 9/9$829
This Air Canada deal was found by Cheapflights users on 9/11. 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.
Tue 11/118:00 pmSEA - SYD
1 stop18h 35mAir Canada
Tue 11/1811:20 amSYD - SEA
1 stop29h 46mAir Canada
Deal found 9/11$830
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/202:42 pmSEA - SYD
1 stop23h 23mAmerican Airlines
Wed 11/511:20 amSYD - SEA
2 stops21h 48mAmerican Airlines
Deal found 9/10$831

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 September 11, 2025.
Use the filters below to find and compare flights from Seattle to New South Wales that are best for you.

Fly from

Seattle

Fly to

New South Wales

Route

Depart

Return

Price

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 11/9

4:30 pm-7:25 am

1 stop19h 55m

Sydney Kingsford Smith

Fri 11/28

5:45 pm-6:11 pm

1 stop19h 26m

$827

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 11/12

7:00 am-7:45 pm

1 stop17h 45m

Sydney Kingsford Smith

Fri 11/21

9:40 pm-11:17 pm

1 stop20h 37m

$827

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 11/9

4:30 pm-7:25 am

1 stop19h 55m

Sydney Kingsford Smith

Sun 11/23

5:45 pm-6:11 pm

1 stop19h 26m

$827

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 11/6

7:00 am-7:45 pm

1 stop17h 45m

Sydney Kingsford Smith

Fri 11/21

9:40 pm-8:49 pm

1 stop18h 09m

$828

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Fri 11/7

7:00 am-7:45 pm

1 stop17h 45m

Sydney Kingsford Smith

Thu 11/20

9:40 pm-5:35 am

1 stop26h 55m

$828

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 9/30

5:26 pm-7:00 am

1 stop20h 34m

Sydney Kingsford Smith

Wed 10/15

10:30 am-9:15 pm

2 stops28h 45m

$843

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 9/21

5:40 pm-6:35 am

1 stop19h 55m

Sydney Kingsford Smith

Tue 9/30

9:25 am-12:45 pm

1 stop20h 20m

$844

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 11/6

7:28 pm-9:15 am

1 stop18h 47m

Sydney Kingsford Smith

Wed 11/19

11:50 am-6:10 pm

2 stops25h 20m

$844

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 9/21

5:35 pm-6:55 am

1 stop20h 20m

Sydney Kingsford Smith

Thu 10/2

9:30 am-9:15 pm

2 stops28h 45m

$844

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 12/13

5:05 am-9:05 am

2 stops33h 00m

Sydney Kingsford Smith

Fri 12/26

12:10 pm-5:00 pm

1 stop23h 50m

$848

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 33 results
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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 $1,035). Flying from Seattle to New South Wales in December is currently the most expensive (average of $1,626). 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.

What is the cheapest time of day to fly from SEA to NSW?

Find hourly flight availability from Seattle to New South Wales. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

When flying from Seattle to New South Wales, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from Seattle to New South Wales?

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 September 11, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and Hawaiian Airlines 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
10,000 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.0

Overall

8.0

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.0

Overall

8.0

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,960 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.0

Overall

8.0

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,723 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.0

Overall

8.0

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,937 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.0

Overall

8.0

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Air Canada
7.1
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.0

Overall

8.0

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 17h 45m. Fly via Alaska Airlines, Qantas Airways, or ANA 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 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 - Coolangatta Gold Coast and Seattle/Tacoma Intl - Dubbo.

  • 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 $1,035). Flying from Seattle to New South Wales in December is currently the most expensive (average of $1,626). 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.

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Alternative routes for Seattle to New South Wales

See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from Seattle to New South Wales

Discover the top 8 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$591Average$1,165FlexibilityNo cancel feeOn-time75%
Qantas AirwaysCheapest$789Average$908FlexibilityNo cancel feeOn-time74%
Air CanadaCheapest$790Average$1,062FlexibilityNo cancel feeOn-time67%
ANACheapest$794Average$1,083FlexibilityNo cancel feeOn-time80%
American AirlinesCheapest$804Average$1,034FlexibilityNo cancel feeOn-time71%
Hawaiian AirlinesCheapest$826Average$1,162FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$836Average$1,118FlexibilityNo cancel feeOn-time69%
DeltaCheapest$842Average$1,070FlexibilityNo cancel feeOn-timeN/A

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