HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
New South Wales

$293+ 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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
Nov 19 — Nov 261
Wed 11/19
Wed 11/26
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to New South Wales with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 October 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$848
(KAYAK)

One-way from

$293
(ANA)

Popular in

December

Cheapest in

September

Average price

$971
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. 12% potential increase in price ($149 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 20, 2025.

This flugladen.de deal was found by Cheapflights users on 10/19. 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 flugladen.de 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
Sat 11/89:40 pmSYD - SEA
1 stop17h 29mHawaiian Airlines
Deal found 10/19$863
This Kiwi.com deal was found by Cheapflights users on 10/20. 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 Kiwi.com 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
Fri 11/79:40 pmSYD - SEA
1 stop17h 29mHawaiian Airlines
Deal found 10/20$869
This Kiwi.com deal was found by Cheapflights users on 10/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/207:44 amSEA - SYD
1 stop18h 01mHawaiian Airlines
Sun 11/29:40 pmSYD - SEA
1 stop17h 29mHawaiian Airlines
Deal found 10/18$871
This Trip.com deal was found by Cheapflights users on 10/19. 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.
Sat 11/157:00 amSEA - SYD
1 stop17h 45mHawaiian Airlines
Sat 12/139:40 pmSYD - SEA
1 stop21h 06mHawaiian Airlines
Deal found 10/19$885
This Alaska Airlines deal was found by Cheapflights users on 10/19. 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.
Thu 10/307:00 amSEA - SYD
1 stop18h 45mAlaska Airlines
Sat 11/89:40 pmSYD - SEA
1 stop17h 29mAlaska Airlines
Deal found 10/19$889
This Kiwi.com deal was found by Cheapflights users on 10/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/23:40 pmSEA - SYD
1 stop33h 35mMultiple Airlines
Tue 12/91:05 pmSYD - SEA
2 stops26h 42mMultiple Airlines
Deal found 10/18$890
This Hawaiian Airlines deal was found by Cheapflights users on 10/20. 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.
Wed 11/127:00 amSEA - SYD
1 stop17h 45mHawaiian Airlines
Tue 11/189:40 pmSYD - SEA
1 stop19h 17mHawaiian Airlines
Deal found 10/20$893
This Alaska Airlines deal was found by Cheapflights users on 10/19. 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 11/127:00 amSEA - SYD
1 stop17h 45mAlaska Airlines
Tue 11/189:40 pmSYD - SEA
1 stop26h 55mAlaska Airlines
Deal found 10/19$898
This Alaska Airlines deal was found by Cheapflights users on 10/18. 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.
Mon 10/207:44 amSEA - SYD
1 stop18h 01mAlaska Airlines
Sun 11/29:40 pmSYD - SEA
2 stops20h 56mAlaska Airlines
Deal found 10/18$899
This Alaska Airlines deal was found by Cheapflights users on 10/19. 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.
Sun 11/93:55 pmSEA - SYD
1 stop32h 50mAlaska Airlines
Tue 11/189:40 pmSYD - SEA
1 stop19h 17mAlaska Airlines
Deal found 10/19$915
This Alaska Airlines deal was found by Cheapflights users on 10/18. 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.
Sun 10/194:45 pmSEA - SYD
1 stop33h 00mAlaska Airlines
Sun 10/269:40 pmSYD - SEA
2 stops27h 29mAlaska Airlines
Deal found 10/18$916
This Alaska Airlines deal was found by Cheapflights users on 10/20. 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.
Tue 11/186:30 pmSEA - SYD
1 stop30h 15mAlaska Airlines
Tue 12/29:40 pmSYD - SEA
1 stop36h 00mAlaska Airlines
Deal found 10/20$932

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 October 20, 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

$893

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 10/29

7:00 am-7:45 pm

1 stop18h 45m

Sydney Kingsford Smith

Sun 11/2

9:40 pm-5:35 am

1 stop26h 55m

$893

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 11/10

7:00 am-7:45 pm

1 stop17h 45m

Sydney Kingsford Smith

Fri 11/21

9:40 pm-8:49 pm

1 stop18h 09m

$898

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 11/10

7:00 am-7:45 pm

1 stop17h 45m

Sydney Kingsford Smith

Tue 11/18

9:40 pm-11:21 pm

1 stop20h 41m

$898

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-10:52 pm

2 stops20h 12m

$898

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 11/9

8:00 am-7:45 pm

1 stop40h 45m

Sydney Kingsford Smith

Thu 11/13

9:40 pm-11:21 pm

1 stop20h 41m

$915

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 11/11

3:55 pm-7:45 pm

1 stop32h 50m

Sydney Kingsford Smith

Tue 11/18

9:40 pm-10:52 pm

2 stops20h 12m

$915

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 12/2

5:50 pm-7:45 pm

1 stop30h 55m

Sydney Kingsford Smith

Tue 12/23

9:40 pm-5:00 am

2 stops26h 20m

$1,121

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 10/25

5:21 am-7:45 pm

2 stops20h 24m

Sydney Kingsford Smith

Fri 11/7

9:40 pm-11:36 pm

2 stops20h 56m

$1,174

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 12/31

7:12 pm-9:15 am

1 stop19h 03m

Sydney Kingsford Smith

Tue 2/10

11:20 am-11:41 am

1 stop19h 21m

$1,191

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/19

Showing 1-10 of 25 results
1
2
3

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, July is the cheapest month in which you can book a flight from Seattle to New South Wales (average of $580). Flying from Seattle to New South Wales in January is currently the most expensive (average of $863). 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 October 20, 2025.

It’s optimal to fly from Seattle to New South Wales in the evening. By choosing this option you can save up to 16% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Seattle to New South Wales?

Use this chart to determine the cheapest time to fly round-trip from Seattle to New South Wales. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to New South Wales flight should consider departing on Tuesday evenings when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 October 20, 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
11,135 reviews

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
11,135 reviews
Alaska Airlines
8.0
Very good
11,135 reviews

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Delta
7.9
Good
7,977 reviews
Alaska Airlines
8.0
Very good
11,135 reviews

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Hawaiian Airlines
7.8
Good
2,786 reviews
Alaska Airlines
8.0
Very good
11,135 reviews

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
United Airlines
7.4
Good
8,988 reviews
Alaska Airlines
8.0
Very good
11,135 reviews

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Air Canada
7.1
Good
10,334 reviews
Alaska Airlines
8.0
Very good
11,135 reviews

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

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 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 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 $293. However, be on the lookout for offers from Philippine Airlines and Air Canada, 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 - 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, July is the cheapest month in which you can book a flight from Seattle to New South Wales (average of $580). Flying from Seattle to New South Wales in January is currently the most expensive (average of $863). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to New South Wales

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Sydney flights
Seattle to Melbourne flights
Portland to Melbourne flights
Portland to Sydney flights
Seattle to Brisbane flights
Portland to Avalon flights
Portland to Brisbane flights
Seattle to Perth flights
Seattle to Avalon flights
Spokane to Sydney flights
Seattle to Canberra flights
Portland to Perth flights
Seattle to Coolangatta flights
Seattle to Cairns flights
Seattle to Adelaide flights
Pasco to Melbourne flights
Seattle to Hobart flights
Seattle to Maroochydore flights
Pasco to Sydney flights
Spokane to Perth flights
Seattle to Darwin flights
Spokane to Brisbane flights
Spokane to Cairns flights
Seattle to Newcastle flights
Portland to Coolangatta flights
Portland to Adelaide flights
Portland to Townsville flights

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 October 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$591Average$1,167FlexibilityNo cancel feeOn-time75%
ANACheapest$610Average$621FlexibilityNo cancel feeOn-time80%
Air CanadaCheapest$779Average$1,048FlexibilityNo cancel feeOn-time67%
Qantas AirwaysCheapest$789Average$882FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$804Average$976FlexibilityNo cancel feeOn-time71%
Hawaiian AirlinesCheapest$820Average$1,150FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$833Average$1,083FlexibilityNo cancel feeOn-time69%
DeltaCheapest$842Average$1,064FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.