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New South Wales

$503+ 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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
ene. 9 — ene. 161
vie. 1/9
vie. 1/16
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 diciembre 10, 2025.

This Justfly.com deal was found by Cheapflights users on 12/9. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/316:00 amSEA - SYD
1 stop32h 00mQantas Airways
mar. 2/107:15 pmSYD - SEA
2 stops41h 50mQantas Airways
Deal found 12/9$1,006
This Expedia deal was found by Cheapflights users on 12/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/88:00 pmSEA - SYD
1 stop39h 55mAir Canada
lun. 12/2211:20 amSYD - SEA
1 stop17h 11mAir Canada
Deal found 12/8$1,042
This Air Canada deal was found by Cheapflights users on 12/8. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/313:40 pmSEA - SYD
1 stop22h 55mAir Canada
mar. 2/1011:20 amSYD - SEA
1 stop22h 11mAir Canada
Deal found 12/8$1,047
This Air Canada deal was found by Cheapflights users on 12/9. 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.
jue. 12/113:40 pmSEA - SYD
1 stop22h 55mAir Canada
mar. 12/2311:20 amSYD - SEA
1 stop26h 56mAir Canada
Deal found 12/9$1,085
This Air Canada deal was found by Cheapflights users on 12/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/278:00 pmSEA - SYD
1 stop18h 35mAir Canada
sáb. 1/177:15 pmSYD - SEA
2 stops33h 16mAir Canada
Deal found 12/10$1,145
This FlightHub deal was found by Cheapflights users on 12/9. 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.
mar. 12/93:40 pmSEA - SYD
1 stop22h 55mMultiple Airlines
mar. 12/168:00 amSYD - SEA
2 stops20h 31mMultiple Airlines
Deal found 12/9$1,153
This Expedia deal was found by Cheapflights users on 12/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/108:00 pmSEA - SYD
1 stop39h 55mAir Canada
mié. 12/1711:20 amSYD - SEA
1 stop17h 11mAir Canada
Deal found 12/9$1,167

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 diciembre 10, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$903
(oojo)

One-way from

$503
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$1,479
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 ($180 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 diciembre 10, 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

mar. 2/10

11:25 am-6:50 am

2 stops24h 25m

Sydney Kingsford Smith

mar. 3/10

1:15 pm-4:45 pm

2 stops21h 30m

$1,117

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

dom. 2/1

11:25 am-6:50 am

2 stops24h 25m

Sydney Kingsford Smith

dom. 2/15

10:40 am-4:48 pm

2 stops25h 08m

$1,117

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

lun. 2/2

1:38 pm-8:30 am

2 stops23h 52m

Sydney Kingsford Smith

mié. 2/18

10:40 am-12:33 pm

2 stops20h 53m

$1,118

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

dom. 2/1

1:38 pm-6:50 am

2 stops22h 12m

Sydney Kingsford Smith

mar. 2/17

2:15 pm-4:48 pm

2 stops21h 33m

$1,118

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

mié. 2/4

1:38 pm-8:30 am

2 stops23h 52m

Sydney Kingsford Smith

mié. 2/18

10:40 am-12:33 pm

2 stops20h 53m

$1,118

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

sáb. 1/31

7:00 pm-6:50 am

2 stops40h 50m

Sydney Kingsford Smith

mié. 2/18

10:40 am-3:10 pm

2 stops23h 30m

$1,118

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

mié. 2/4

1:38 pm-8:30 am

2 stops23h 52m

Sydney Kingsford Smith

mar. 2/17

10:40 am-12:33 pm

2 stops20h 53m

$1,118

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

mié. 2/4

3:57 pm-9:00 am

1 stop22h 03m

Sydney Kingsford Smith

jue. 2/12

7:40 pm-7:58 pm

2 stops43h 18m

$1,146

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

lun. 2/2

3:57 pm-9:00 am

1 stop22h 03m

Sydney Kingsford Smith

sáb. 2/14

11:20 am-6:57 pm

1 stop26h 37m

$1,148

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

sáb. 1/31

6:00 am-9:00 am

1 stop32h 00m

Sydney Kingsford Smith

mié. 2/18

11:20 am-6:53 pm

1 stop26h 33m

$1,157

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/8

Showing 1-10 of 30 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 $501). 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 diciembre 10, 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 diciembre 10, 2025.
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
11,426 reviews

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.0

Food

7.1

Boarding

8.1

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
11,426 reviews
Alaska Airlines
8.0
Very good
11,426 reviews

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.0

Food

7.1

Boarding

8.1

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
8,007 reviews
Alaska Airlines
8.0
Very good
11,426 reviews

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.0

Food

7.1

Boarding

8.1

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.
Qantas Airways
7.5
Good
947 reviews
Alaska Airlines
8.0
Very good
11,426 reviews

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.0

Food

7.1

Boarding

8.1

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
9,093 reviews
Alaska Airlines
8.0
Very good
11,426 reviews

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.0

Food

7.1

Boarding

8.1

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
10,514 reviews
Alaska Airlines
8.0
Very good
11,426 reviews

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.0

Food

7.1

Boarding

8.1

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 24h 25m. Fly via Delta, Qantas Airways, or United 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 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 - Dubbo and Seattle/Tacoma Intl - Newcastle Williamtown.

  • 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 $501). 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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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 diciembre 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
ANACheapest$583Average$615FlexibilityNo cancel feeOn-time80%
Alaska AirlinesCheapest$591Average$1,176FlexibilityNo cancel feeOn-time75%
Philippine AirlinesCheapest$758Average$921FlexibilityNo cancel feeOn-time60%
Air CanadaCheapest$779Average$1,051FlexibilityNo cancel feeOn-time67%
Qantas AirwaysCheapest$789Average$888FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$804Average$976FlexibilityNo cancel feeOn-time71%
Hawaiian AirlinesCheapest$813Average$1,155FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$831Average$1,127FlexibilityNo cancel feeOn-time69%
DeltaCheapest$842Average$1,150FlexibilityNo cancel feeOn-timeN/A

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