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New South Wales

$377+ 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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
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 16, 2025.

Round-trip from

$815
(CheapTickets)

One-way from

$377
(FlightHub)

Popular in

January

Cheapest in

September

Average price

$941
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. 9% potential increase in price ($114 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($22 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 16, 2025.

This CheapTickets deal was found by Cheapflights users on 9/16. 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 CheapTickets is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/317:00 amSEA - SYD
1 stop18h 45mHawaiian Airlines
Fri 11/79:40 pmSYD - SEA
1 stop19h 17mHawaiian Airlines
Deal found 9/16$815
This American Airlines deal was found by Cheapflights users on 9/14. 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 9/203:40 pmSEA - SYD
1 stop22h 15mAmerican Airlines
Wed 10/112:10 pmSYD - SEA
1 stop23h 59mAmerican Airlines
Deal found 9/14$817
This American Airlines deal was found by Cheapflights users on 9/14. 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 9/213:40 pmSEA - SYD
1 stop22h 15mAmerican Airlines
Tue 10/710:10 amSYD - SEA
1 stop28h 15mAmerican Airlines
Deal found 9/14$818
This Cheapflightsfares deal was found by Cheapflights users on 9/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/166:05 pmSEA - SYD
1 stop19h 00mMultiple Airlines
Tue 9/239:10 amSYD - SEA
1 stop18h 48mMultiple Airlines
Deal found 9/16$820
This American Airlines deal was found by Cheapflights users on 9/16. 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.
Fri 10/3111:04 amSEA - SYD
2 stops27h 56mAmerican Airlines
Fri 11/711:20 amSYD - SEA
2 stops21h 48mAmerican Airlines
Deal found 9/16$821
This Hawaiian Airlines deal was found by Cheapflights users on 9/15. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/77:00 amSEA - SYD
1 stop17h 45mHawaiian Airlines
Sun 11/169:40 pmSYD - SEA
1 stop19h 17mHawaiian Airlines
Deal found 9/15$823
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Wed 10/221:10 pmSEA - SYD
1 stop24h 55mAmerican Airlines
Wed 10/2911:20 amSYD - SEA
1 stop19h 20mAmerican Airlines
Deal found 9/14$827
This American Airlines deal was found by Cheapflights users on 9/15. 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 12/16:41 pmSEA - SYD
1 stop19h 19mAmerican Airlines
Sun 12/145:45 pmSYD - SEA
1 stop19h 35mAmerican Airlines
Deal found 9/15$828
This Hawaiian Airlines deal was found by Cheapflights users on 9/16. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/17:00 amSEA - SYD
1 stop18h 45mHawaiian Airlines
Fri 11/219:40 pmSYD - SEA
1 stop20h 37mHawaiian Airlines
Deal found 9/16$829
This Air Canada deal was found by Cheapflights users on 9/14. 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 10/212:55 pmSEA - SYD
1 stop23h 25mAir Canada
Mon 11/311:20 amSYD - SEA
1 stop17h 11mAir Canada
Deal found 9/14$830
This Expedia deal was found by Cheapflights users on 9/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1811:32 amSEA - OOL
2 stops27h 58mMultiple Airlines
Wed 12/36:00 amOOL - SEA
2 stops30h 28mMultiple Airlines
Deal found 9/15$1,012
This FlightHub deal was found by Cheapflights users on 9/14. 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.
Wed 11/192:59 pmSEA - OOL
2 stops29h 06mQantas Airways
Wed 12/310:25 amOOL - SEA
2 stops25h 03mQantas Airways
Deal found 9/14$1,033

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 16, 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

Wed 11/12

7:00 am-7:45 pm

1 stop17h 45m

Sydney Kingsford Smith

Tue 11/18

9:40 pm-9:57 pm

1 stop19h 17m

$823

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 11/1

7:00 am-7:45 pm

1 stop18h 45m

Sydney Kingsford Smith

Tue 11/18

9:40 pm-8:09 pm

1 stop17h 29m

$829

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 2/26

7:20 am-7:45 pm

1 stop17h 25m

Sydney Kingsford Smith

Thu 3/5

9:40 pm-9:45 pm

2 stops19h 05m

$829

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 11/1

7:00 am-7:45 pm

1 stop18h 45m

Sydney Kingsford Smith

Fri 11/14

9:40 pm-5:35 am

1 stop26h 55m

$829

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Fri 2/27

7:20 am-7:45 pm

1 stop17h 25m

Sydney Kingsford Smith

Thu 3/5

9:40 pm-8:15 pm

1 stop17h 35m

$829

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 11/12

7:00 am-7:45 pm

1 stop17h 45m

Sydney Kingsford Smith

Tue 11/18

9:40 pm-11:21 pm

1 stop20h 41m

$829

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 11/1

7:00 am-7:45 pm

1 stop18h 45m

Sydney Kingsford Smith

Thu 11/13

9:40 pm-7:11 am

2 stops28h 31m

$829

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 2/25

7:20 am-7:45 pm

1 stop17h 25m

Sydney Kingsford Smith

Thu 3/5

9:40 pm-9:45 pm

2 stops19h 05m

$829

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 2/26

7:20 am-7:45 pm

1 stop17h 25m

Sydney Kingsford Smith

Sat 3/7

9:40 pm-10:40 pm

1 stop20h 00m

$829

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 2/28

7:20 am-7:45 pm

1 stop17h 25m

Sydney Kingsford Smith

Sun 3/8

9:40 pm-10:40 pm

1 stop19h 00m

$829

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 32 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, March is the cheapest month in which you can book a flight from Seattle to New South Wales (average of $1,032). Flying from Seattle to New South Wales in December is currently the most expensive (average of $1,627). 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 16, 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.

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 16, 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

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Boarding

8.1

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

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Boarding

8.1

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
7,957 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Boarding

8.1

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
2,724 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Boarding

8.1

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
8,924 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Boarding

8.1

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

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Boarding

8.1

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 Hawaiian Airlines, Alaska Airlines, or Qantas Airways 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, March is the cheapest month in which you can book a flight from Seattle to New South Wales (average of $1,032). Flying from Seattle to New South Wales in December is currently the most expensive (average of $1,627). 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 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$591Average$1,169FlexibilityNo cancel feeOn-time75%
Qantas AirwaysCheapest$789Average$902FlexibilityNo cancel feeOn-time74%
Air CanadaCheapest$789Average$1,063FlexibilityNo cancel feeOn-time67%
ANACheapest$794Average$1,083FlexibilityNo cancel feeOn-time80%
American AirlinesCheapest$804Average$996FlexibilityNo cancel feeOn-time71%
Hawaiian AirlinesCheapest$826Average$1,159FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$836Average$1,114FlexibilityNo cancel feeOn-time69%
DeltaCheapest$842Average$1,066FlexibilityNo cancel feeOn-timeN/A

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