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$531+ 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 3/15. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — SEA
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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Find cheap flights from Sydney to Seattle 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.

Cheapflights Tip: The best prices from Sydney Kingsford Smith to Seattle/Tacoma Intl are usually found in August or September, booked 24 days in advance, depart on a Saturday or Sunday and return on a Tuesday

Cheap 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 October 29, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$859
(Vliegwinkel)

One-way from

$531
(Trip.com)

Popular in

July

Cheapest in

August

Average price

$1,005
Provider with most accurate pricing for Sydney Kingsford Smith-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Seattle/Tacoma Intl flights.
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From Sydney Kingsford Smith to Seattle/Tacoma Intl
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One-way flight from Sydney Kingsford Smith to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 1% potential increase in price ($20 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 29, 2025.

This Vliegwinkel deal was found by Cheapflights users on 10/28. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/209:40 pmSYD - SEA
1 stop29h 00mMultiple Airlines
Fri 12/53:40 pmSEA - SYD
1 stop33h 35mMultiple Airlines
Deal found 10/28$859
This Justfly.com deal was found by Cheapflights users on 10/27. 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.
Fri 11/72:00 pmSYD - SEA
2 stops23h 57mMultiple Airlines
Tue 11/115:30 pmSEA - SYD
2 stops33h 20mMultiple Airlines
Deal found 10/27$984
This BestPriceTravel deal was found by Cheapflights users on 10/28. 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 BestPriceTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2511:20 amSYD - SEA
1 stop22h 11mAir Canada
Wed 12/108:00 pmSEA - SYD
1 stop39h 55mAir Canada
Deal found 10/28$1,005
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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 11/209:40 pmSYD - SEA
2 stops26h 37mAlaska Airlines
Fri 12/511:20 pmSEA - SYD
2 stops25h 25mAlaska Airlines
Deal found 10/28$1,016
This BestPriceTravel deal was found by Cheapflights users on 10/27. 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 BestPriceTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/44:00 pmSYD - SEA
1 stop36h 31mAir Canada
Sat 12/133:40 pmSEA - SYD
1 stop22h 55mAir Canada
Deal found 10/27$1,030
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/89:40 pmSYD - SEA
1 stop19h 17mHawaiian Airlines
Wed 11/127:00 amSEA - SYD
1 stop17h 45mHawaiian Airlines
Deal found 10/29$1,054
This BestPriceTravel deal was found by Cheapflights users on 10/27. 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 BestPriceTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2411:20 amSYD - SEA
1 stop22h 11mAir Canada
Tue 12/910:05 amSEA - SYD
1 stop25h 50mAir Canada
Deal found 10/27$1,059
This Justfly.com deal was found by Cheapflights users on 10/27. 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.
Fri 11/711:20 amSYD - SEA
1 stop17h 11mAir Canada
Tue 11/113:40 pmSEA - SYD
1 stop22h 55mAir Canada
Deal found 10/27$1,075

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 October 29, 2025.
Use the filters below to find and compare flights from Sydney to Seattle that are best for you.

Fly from

Sydney

Fly to

Seattle

Route

Depart

Return

Price

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Wed 3/11

10:20 am-2:55 pm

1 stop22h 35m

Seattle/Tacoma Intl

Sat 3/14

12:10 am-8:20 am

1 stop38h 10m

$965

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Tue 11/25

11:20 am-2:31 pm

1 stop22h 11m

Seattle/Tacoma Intl

Wed 12/10

8:00 pm-6:55 am

1 stop39h 55m

$1,005

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Mon 11/24

11:45 am-4:48 pm

2 stops24h 03m

Seattle/Tacoma Intl

Tue 12/9

12:30 pm-10:30 am

2 stops27h 00m

$1,016

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Wed 3/11

11:35 am-7:40 pm

1 stop26h 05m

Seattle/Tacoma Intl

Sun 3/15

10:30 pm-9:50 am

1 stop41h 20m

$1,030

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sat 11/8

9:40 pm-9:57 pm

1 stop19h 17m

Seattle/Tacoma Intl

Wed 11/12

7:00 am-7:45 pm

1 stop17h 45m

$1,054

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Mon 11/24

11:20 am-2:31 pm

1 stop22h 11m

Seattle/Tacoma Intl

Tue 12/9

10:05 am-6:55 am

1 stop25h 50m

$1,059

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Mon 1/19

9:40 pm-6:46 am

2 stops28h 06m

$569

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Thu 1/22

9:40 pm-5:19 am

1 stop26h 39m

$589

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sat 12/6

9:40 pm-5:15 am

1 stop26h 35m

$590

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sat 11/8

8:05 pm-6:40 pm

3 stops41h 35m

$593

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 16 results
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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
Justfly.comPrice 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 Justfly.com to be most consistent on Cheapflights vs. Justfly.com Users can find the same prices on Sydney-Seattle flight deals on Cheapflights vs. Justfly.com >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 Justfly.com the most. Justfly.com 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?

Use this chart to determine the optimal time to book a round-trip flight from Sydney to Seattle. Price data was last updated on October 24, 2025.

The best time to book flights from Sydney to Seattle is 24 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, June is the cheapest month in which you can book a flight from Sydney to Seattle (average of $710). Flying from Sydney to Seattle in April is currently the most expensive (average of $881). 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 SYD to SEA?

Find hourly flight availability from Sydney to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 29, 2025.

It’s optimal to fly from Sydney to Seattle in the morning. By choosing this option you can save up to 49% on the cost of your flight, compared to a flight at noon.

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

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 October 29, 2025.
Read through reviews of airlines operating flights from Sydney to Seattle, such as Delta, Hawaiian Airlines, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,993 reviews

Boarding

8.2

Crew

8.5

Overall

7.9

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
Delta
7.9
Good
7,993 reviews
Delta
7.9
Good
7,993 reviews

Boarding

8.2

Crew

8.5

Overall

7.9

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
Hawaiian Airlines
7.8
Good
2,797 reviews
Delta
7.9
Good
7,993 reviews

Boarding

8.2

Crew

8.5

Overall

7.9

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
United Airlines
7.4
Good
8,998 reviews
Delta
7.9
Good
7,993 reviews

Boarding

8.2

Crew

8.5

Overall

7.9

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
Air Canada
7.1
Good
10,375 reviews
Delta
7.9
Good
7,993 reviews

Boarding

8.2

Crew

8.5

Overall

7.9

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!

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 22h 11m. Asiana Airlines provides one of the quickest options available for as low as $1,005. 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 $598, 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. Search Cheapflights for deals from United Airlines and Delta - these airlines can fly you to your destination from $794 and $802, respectively. Air Canada is 45% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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, June is the cheapest month in which you can book a flight from Sydney to Seattle (average of $710). Flying from Sydney to Seattle in April is currently the most expensive (average of $881). 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
Tukwila
Tacoma
Lakewood
Olympia
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Kirkland
Lacey
Kent
Federal Way
Cle Elum
Marysville
Puyallup
Chehalis
Fife
Issaquah

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Sydney to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Sydney to Portland flights

Top 4 airlines flying from Sydney to Seattle

Discover the top 4 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 October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$598Average$1,052FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$794Average$1,167FlexibilityNo cancel feeOn-time69%
DeltaCheapest$802Average$1,374FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$917Average$1,547FlexibilityNo cancel feeOn-time85%

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