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New South Wales

$379+ 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 11/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
Dec 19 — Dec 261
Fri 12/19
Fri 12/26
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 November 19, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$883
(Jetabroad)

One-way from

$379
(SmartFares)

Popular in

December

Cheapest in

August

Average price

$960
Provider with most accurate pricing for Seattle/Tacoma Intl-Sydney Kingsford Smith flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Sydney Kingsford Smith flights.
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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. 14% potential increase in price ($174 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 19, 2025.

This lol.travel deal was found by Cheapflights users on 11/17. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/303:40 pmSEA - SYD
1 stop22h 55mAir Canada
Sun 12/1411:20 amSYD - SEA
1 stop22h 11mAir Canada
Deal found 11/17$959
This Mytrip deal was found by Cheapflights users on 11/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/239:30 pmSEA - SYD
1 stop41h 20mMultiple Airlines
Fri 12/56:20 amSYD - SEA
2 stops22h 11mMultiple Airlines
Deal found 11/18$981
This oojo deal was found by Cheapflights users on 11/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 amSEA - SYD
1 stop32h 00mQantas Airways
Tue 2/107:05 amSYD - SEA
2 stops24h 24mQantas Airways
Deal found 11/18$988
This Justfly.com deal was found by Cheapflights users on 11/16. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/216:00 amSEA - SYD
1 stop32h 00mQantas Airways
Wed 1/147:15 pmSYD - SEA
2 stops41h 50mQantas Airways
Deal found 11/16$1,004
This Qantas Airways deal was found by Cheapflights users on 11/18. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/216:00 amSEA - SYD
1 stop32h 00mQantas Airways
Fri 1/167:15 pmSYD - SEA
2 stops43h 07mQantas Airways
Deal found 11/18$1,010
This Air Canada deal was found by Cheapflights users on 11/18. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:00 pmSEA - SYD
1 stop18h 35mAir Canada
Tue 2/1011:20 amSYD - SEA
1 stop17h 11mAir Canada
Deal found 11/18$1,015
This FlightHub deal was found by Cheapflights users on 11/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/183:40 pmSEA - OOL
2 stops24h 05mAir New Zealand
Wed 12/316:00 amOOL - SEA
2 stops24h 27mAir New Zealand
Deal found 11/18$2,839
This oojo deal was found by Cheapflights users on 11/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/173:40 pmSEA - OOL
2 stops24h 05mAir New Zealand
Sun 1/410:55 amOOL - SEA
2 stops29h 11mAir New Zealand
Deal found 11/18$3,284
This Mytrip deal was found by Cheapflights users on 11/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1710:05 amSEA - OOL
3 stops33h 40mMultiple Airlines
Sun 1/46:10 pmOOL - SEA
3 stops45h 56mMultiple Airlines
Deal found 11/18$3,615

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 November 19, 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

Tue 1/6

10:25 am-8:30 am

1 stop27h 05m

Sydney Kingsford Smith

Tue 1/27

10:40 am-12:33 pm

2 stops20h 53m

$1,166

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 1/6

1:38 pm-8:30 am

2 stops23h 52m

Sydney Kingsford Smith

Wed 1/14

10:40 am-11:22 pm

2 stops31h 42m

$1,166

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 2/15

11:15 am-8:30 am

2 stops26h 15m

Sydney Kingsford Smith

Sun 2/22

10:40 am-6:29 pm

2 stops26h 49m

$1,166

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 12/21

7:50 pm-8:30 am

1 stop41h 40m

Sydney Kingsford Smith

Sun 1/18

10:40 am-10:17 am

1 stop18h 37m

$1,170

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Fri 2/13

11:15 am-8:30 am

2 stops26h 15m

Sydney Kingsford Smith

Sun 2/22

10:40 am-10:15 am

1 stop18h 35m

$1,216

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Fri 1/9

7:35 pm-6:50 am

1 stop40h 15m

Sydney Kingsford Smith

Mon 1/26

10:40 am-10:17 am

1 stop18h 37m

$1,220

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Fri 1/9

7:35 pm-6:50 am

1 stop40h 15m

Sydney Kingsford Smith

Wed 1/21

10:40 am-3:00 pm

2 stops23h 20m

$1,225

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 1/5

1:38 pm-6:50 am

2 stops46h 12m

Sydney Kingsford Smith

Fri 1/30

10:40 am-4:55 pm

2 stops25h 15m

$1,230

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 1/8

6:05 pm-6:50 am

2 stops65h 45m

Sydney Kingsford Smith

Mon 1/26

10:40 am-2:54 pm

1 stop23h 14m

$1,231

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Fri 2/13

3:50 pm-9:50 am

2 stops23h 00m

Sydney Kingsford Smith

Sat 2/21

11:20 am-6:57 pm

1 stop26h 37m

$1,255

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/16

Showing 1-10 of 26 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, July is the cheapest month in which you can book a flight from Seattle to New South Wales (average of $535). 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.

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 November 19, 2025.

It’s optimal to fly from Seattle to New South Wales at noon. By choosing this option you can save up to 26% on the cost of your flight, compared to a flight in the evening.

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 November 19, 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
11,321 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Overall

8.0

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
11,321 reviews
Alaska Airlines
8.0
Very good
11,321 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Overall

8.0

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
8,004 reviews
Alaska Airlines
8.0
Very good
11,321 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Overall

8.0

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
2,811 reviews
Alaska Airlines
8.0
Very good
11,321 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Overall

8.0

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
9,025 reviews
Alaska Airlines
8.0
Very good
11,321 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Overall

8.0

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
10,462 reviews
Alaska Airlines
8.0
Very good
11,321 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Overall

8.0

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 27h 05m. Fly via Delta, Qantas Airways, or Singapore Airlines 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, July is the cheapest month in which you can book a flight from Seattle to New South Wales (average of $535). 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.

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Alternative routes for Seattle to New South Wales

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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 November 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
ANACheapest$583Average$615FlexibilityNo cancel feeOn-time80%
Alaska AirlinesCheapest$591Average$1,165FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$779Average$1,053FlexibilityNo cancel feeOn-time67%
Qantas AirwaysCheapest$789Average$880FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$804Average$976FlexibilityNo cancel feeOn-time71%
Hawaiian AirlinesCheapest$820Average$1,143FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$832Average$1,115FlexibilityNo cancel feeOn-time69%
DeltaCheapest$842Average$1,073FlexibilityNo cancel feeOn-timeN/A

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