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$420+ Cheap flights from Sydney (SYD) to Seattle (SEA)

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.
SYD — SEA
Aug 23 — Aug 301
Sun 8/23
Sun 8/30
1 adult, Economy
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Cheap flight deals from Sydney to Seattle

Cheapest flights from Sydney to Seattle
Explore the most affordable flight options available from Sydney to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 24, 2026.

This Trip.com deal was found by Cheapflights users on 7/21. 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.
Wed 8/261:15 pm
SYD
-
SEA
2 stops22h 11m
Multiple Airlines
Wed 9/166:49 am
SEA
-
SYD
2 stops36h 01m
Multiple Airlines
Deal found 7/21$891
This Trip.com deal was found by Cheapflights users on 7/19. 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.
Thu 9/31:15 pm
SYD
-
SEA
3 stops37h 04m
Multiple Airlines
Thu 9/1011:06 am
SEA
-
SYD
2 stops42h 19m
Multiple Airlines
Deal found 7/19$897
This Trip.com deal was found by Cheapflights users on 7/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/181:15 pm
SYD
-
SEA
3 stops26h 26m
Multiple Airlines
Wed 9/21:34 pm
SEA
-
SYD
3 stops29h 16m
Multiple Airlines
Deal found 7/20$906
This Trip.com deal was found by Cheapflights users on 7/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:15 am
SYD
-
SEA
3 stops44h 04m
Multiple Airlines
Fri 9/1811:06 am
SEA
-
SYD
2 stops31h 44m
Multiple Airlines
Deal found 7/20$937
This American Airlines deal was found by Cheapflights users on 7/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/179:10 am
SYD
-
SEA
1 stop31h 11m
American Airlines
Tue 9/13:47 pm
SEA
-
SYD
1 stop22h 08m
American Airlines
Deal found 7/19$951
This United Airlines deal was found by Cheapflights users on 7/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/39:30 am
SYD
-
SEA
2 stops30h 12m
United Airlines
Mon 8/106:57 pm
SEA
-
SYD
1 stop18h 58m
United Airlines
Deal found 7/20$954
This United Airlines deal was found by Cheapflights users on 7/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/279:30 am
SYD
-
SEA
2 stops28h 40m
United Airlines
Sun 8/98:45 am
SEA
-
SYD
1 stop29h 10m
United Airlines
Deal found 7/24$955
This Trip.com deal was found by Cheapflights users on 7/22. 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.
Tue 9/151:15 pm
SYD
-
SEA
3 stops28h 12m
Multiple Airlines
Tue 9/292:15 pm
SEA
-
SYD
2 stops39h 10m
Multiple Airlines
Deal found 7/22$959
This Delta deal was found by Cheapflights users on 7/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/39:15 am
SYD
-
SEA
1 stop28h 15m
Delta
Mon 8/107:16 am
SEA
-
SYD
1 stop30h 34m
Delta
Deal found 7/20$960
This Bravofly deal was found by Cheapflights users on 7/20. 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 Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/189:10 am
SYD
-
SEA
1 stop31h 11m
Qantas Airways
Wed 9/25:22 pm
SEA
-
SYD
1 stop20h 43m
Qantas Airways
Deal found 7/20$963
This United Airlines deal was found by Cheapflights users on 7/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/710:20 am
SYD
-
SEA
1 stop22h 54m
United Airlines
Mon 9/146:52 pm
SEA
-
SYD
1 stop19h 08m
United Airlines
Deal found 7/24$971

Find flight deals from Sydney to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Sydney (SYD) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$891
(Trip.com)

One-way from

$420
(Trip.com)

Popular in

January

Cheapest in

August

Average price

$1,085
Provider with most accurate pricing for Sydney Kingsford Smith-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Seattle/Tacoma Intl flights.
Search Deals
From Sydney Kingsford Smith to Seattle/Tacoma Intl
Search Deals
One-way flight from Sydney Kingsford Smith to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($56 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sydney to Seattle 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 July 24, 2026.
Use the filters below to find and compare flights from Sydney to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Mon 9/7

10:20 am-4:14 pm

1 stop22h 54m

Seattle/Tacoma Intl

Mon 9/14

6:52 pm-7:00 am

1 stop19h 08m

$971

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Fri 8/21

9:30 am-3:45 pm

1 stop23h 15m

Seattle/Tacoma Intl

Sat 9/5

1:16 pm-6:55 am

1 stop24h 39m

$1,031

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sat 10/3

10:20 am-12:20 pm

1 stop19h 00m

Seattle/Tacoma Intl

Fri 10/9

11:59 pm-7:55 am

2 stops37h 56m

$1,083

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Fri 8/21

9:15 am-4:54 pm

2 stops24h 39m

Seattle/Tacoma Intl

Fri 8/28

11:05 am-6:50 am

2 stops26h 45m

$1,084

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Fri 9/4

9:15 am-4:54 pm

2 stops24h 39m

Seattle/Tacoma Intl

Fri 9/11

11:22 am-6:50 am

2 stops26h 28m

$1,223

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Tue 9/1

9:15 am-9:45 pm

1 stop29h 30m

Seattle/Tacoma Intl

Tue 9/22

5:40 pm-6:50 am

1 stop20h 10m

$1,299

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Tue 12/22

1:20 pm-9:21 pm

2 stops27h 01m

Seattle/Tacoma Intl

Sun 1/24

7:32 pm-9:20 am

1 stop18h 48m

$1,368

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Fri 12/25

11:50 am-3:49 pm

2 stops22h 59m

Seattle/Tacoma Intl

Fri 1/15

2:10 pm-12:50 pm

2 stops27h 40m

$1,589

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Tue 9/1

1:30 pm-10:59 pm

3 stops26h 29m

Seattle/Tacoma Intl

Tue 9/22

3:51 pm-6:25 am

2 stops21h 34m

$2,443

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Thu 12/24

7:00 am-1:40 pm

3 stops25h 40m

Seattle/Tacoma Intl

Fri 1/15

2:10 pm-6:25 am

2 stops21h 15m

$2,608

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/20

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

Compare providers for flights from Sydney to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Sydney to Seattle in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
BusinessClassPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Sydney-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Sydney-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Sydney-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sydney-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Sydney-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Sydney to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Sydney 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 Sydney to Seattle

How far ahead should I book a flight from Sydney to Seattle?

The best time to book flights from Sydney to Seattle is 67 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Sydney to Seattle?

Currently, August is the cheapest month in which you can book a flight from Sydney to Seattle (average of $864). Flying from Sydney to Seattle in January is currently the most expensive (average of $1,222). 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.

How much does it cost to fly round-trip from Sydney to Seattle?

Airfare is below average for this route at the moment.

Sydney to Seattle flights typically cost between $912 and $1,181 in August.
The cheapest round-trip price found within the last 5 days was $891 on Multiple Airlines (Aug 26-Sep 16).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated July 24, 2026.
Read through reviews of airlines operating flights from Sydney to Seattle, such as United Airlines and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,029 reviews

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Comfort

7.3

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this
United Airlines
7.4
Good
10,029 reviews
United Airlines
7.4
Good
10,029 reviews

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Comfort

7.3

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this
Air Canada
7.1
Good
11,381 reviews
United Airlines
7.4
Good
10,029 reviews

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Comfort

7.3

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this

Related info for your journey

Find useful and relevant information for your journey from Sydney to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Sydney to Seattle?

    A quick flight from Sydney to Seattle can take about 21h 41m. American Airlines provides one of the quickest options available for as low as $954. There are 7744 mi between Sydney and Seattle. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Sydney to Seattle round-trip?

    Currently priced at $828, Air Canada will fly you from Sydney to Seattle and back. In addition to Air Canada, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on United Airlines for as low as $989. Air Canada is 22% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Sydney to Seattle one-way?

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as $379. However, be on the lookout for offers from Air Canada and Delta, as they are both options that can get you from Sydney to Seattle for a low price.

  • Can I find deals for flights from Sydney to Seattle that include hotel bookings?

    Yes. In addition to deals on Sydney to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Sydney to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sydney to Seattle.

  • Can I find deals for business class flights from Sydney to Seattle?

    Yes. Cheapflights offers flight deals from Sydney to Seattle 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 Sydney to Seattle?

    Currently, August is the cheapest month in which you can book a flight from Sydney to Seattle (average of $864). Flying from Sydney to Seattle in January is currently the most expensive (average of $1,222). 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tacoma
Renton
Lacey
Leavenworth
Olympia
Edmonds
Snoqualmie
Tumwater
Tukwila
Centralia
Puyallup
Kent
Ellensburg
Fife
Marysville
Ocean Shores
Lakewood
Lynnwood
Issaquah

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.

Top 2 airlines flying from Sydney to Seattle

Discover the top 2 airlines that operate flights from Sydney to Seattle. 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 July 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$828Average$1,062FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$989Average$1,075FlexibilityNo cancel feeOn-time69%

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