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$431+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — SEA
Aug 26 — Sep 21
Tue 8/26
Tue 9/2
1 adult, Economy
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Find cheap flights from Sydney to Seattle with Cheapflights

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Cheapflights Tip: The best prices from Sydney Kingsford Smith to Seattle/Tacoma Intl are usually found in February or August, booked 52 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 August 21, 2025.

Round-trip from

$821
(Netflights)

One-way from

$431
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,005
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. 8% potential increase in price ($97 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 August 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 August 21, 2025.

This Netflights deal was found by Cheapflights users on 8/21. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/711:20 amSYD - SEA
1 stop26h 56mAir Canada
Tue 11/1110:05 amSEA - SYD
1 stop28h 30mAir Canada
Deal found 8/21$821
This Booking.com deal was found by Cheapflights users on 8/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1710:20 amSYD - SEA
1 stop17h 01mAir Canada
Sun 10/268:00 pmSEA - SYD
1 stop18h 35mAir Canada
Deal found 8/20$824
This American Airlines deal was found by Cheapflights users on 8/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/249:10 amSYD - SEA
1 stop21h 51mAmerican Airlines
Sat 9/63:23 pmSEA - SYD
1 stop22h 42mAmerican Airlines
Deal found 8/20$825
This Delta deal was found by Cheapflights users on 8/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/269:25 amSYD - SEA
2 stops22h 18mDelta
Sun 9/141:30 pmSEA - SYD
2 stops24h 05mDelta
Deal found 8/21$826
This Air Canada deal was found by Cheapflights users on 8/20. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2011:20 amSYD - SEA
1 stop22h 06mAir Canada
Fri 11/285:50 amSEA - SYD
1 stop32h 45mAir Canada
Deal found 8/20$828
This American Airlines deal was found by Cheapflights users on 8/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/239:10 amSYD - SEA
1 stop29h 48mAmerican Airlines
Mon 9/298:08 amSEA - SYD
2 stops29h 57mAmerican Airlines
Deal found 8/20$829
This Delta deal was found by Cheapflights users on 8/20. 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.
Sun 9/219:25 amSYD - SEA
2 stops22h 14mDelta
Mon 9/292:25 pmSEA - SYD
1 stop23h 10mDelta
Deal found 8/20$830
This Delta deal was found by Cheapflights users on 8/20. 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.
Sun 8/249:25 amSYD - SEA
2 stops24h 13mDelta
Sat 9/69:45 amSEA - SYD
2 stops27h 50mDelta
Deal found 8/20$831
This Booking.com deal was found by Cheapflights users on 8/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/254:00 pmSYD - SEA
1 stop17h 26mMultiple Airlines
Sun 1/410:05 amSEA - SYD
2 stops34h 50mMultiple Airlines
Deal found 8/21$832
This Alaska Airlines deal was found by Cheapflights users on 8/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/49:40 pmSYD - SEA
2 stops20h 12mAlaska Airlines
Wed 11/57:00 amSEA - SYD
1 stop17h 45mAlaska Airlines
Deal found 8/21$833
This BYOjet deal was found by Cheapflights users on 8/20. 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 BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/254:00 pmSYD - SEA
1 stop25h 06mAir Canada
Sun 1/43:40 pmSEA - SYD
2 stops35h 05mAir Canada
Deal found 8/20$835

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 August 21, 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

Fri 11/7

11:20 am-7:16 pm

1 stop26h 56m

Seattle/Tacoma Intl

Tue 11/11

10:05 am-9:35 am

1 stop28h 30m

$821

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Thu 11/20

11:20 am-9:31 am

1 stop17h 11m

Seattle/Tacoma Intl

Fri 11/28

10:05 am-9:35 am

1 stop28h 30m

$824

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Fri 10/17

10:20 am-9:21 am

1 stop17h 01m

Seattle/Tacoma Intl

Sun 10/26

8:00 pm-8:35 am

1 stop18h 35m

$824

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Thu 9/18

9:40 pm-7:15 am

2 stops26h 35m

Seattle/Tacoma Intl

Fri 9/19

6:27 pm-7:45 pm

2 stops32h 18m

$825

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sun 8/31

9:30 am-5:58 pm

2 stops25h 28m

Seattle/Tacoma Intl

Thu 9/11

7:34 pm-6:55 am

1 stop18h 21m

$826

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sun 8/31

9:30 am-1:30 pm

1 stop21h 00m

Seattle/Tacoma Intl

Fri 9/12

7:34 pm-6:55 am

1 stop18h 21m

$826

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sun 8/31

9:30 am-1:30 pm

1 stop21h 00m

Seattle/Tacoma Intl

Sun 9/14

5:35 pm-6:55 am

1 stop20h 20m

$826

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sun 8/31

9:30 am-3:43 pm

2 stops23h 13m

Seattle/Tacoma Intl

Sat 9/13

5:35 pm-6:55 am

1 stop20h 20m

$826

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sun 8/31

9:30 am-1:30 pm

1 stop21h 00m

Seattle/Tacoma Intl

Mon 9/8

2:29 pm-6:55 am

1 stop23h 26m

$826

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sun 8/31

9:30 am-3:43 pm

2 stops23h 13m

Seattle/Tacoma Intl

Wed 9/10

7:34 pm-6:55 am

1 stop18h 21m

$826

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/19

Showing 1-10 of 16 results
1
2

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 August 8, 2025.

The best time to book flights from Sydney to Seattle is 52 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, January is the cheapest month in which you can book a flight from Sydney to Seattle (average of $238). Flying from Sydney to Seattle in June is currently the most expensive (average of $388). 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 August 21, 2025.

It’s optimal to fly from Sydney to Seattle in the morning. By choosing this option you can save up to 28% on the cost of your flight, compared to a flight at noon.

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 August 21, 2025.
Read through reviews of airlines operating flights from Sydney to Seattle, such as Delta, Hawaiian Airlines, and Qantas Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Hawaiian Airlines
7.8
Good
2,672 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Qantas Airways
7.5
Good
898 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
United Airlines
7.4
Good
8,934 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Air Canada
7.1
Good
10,000 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

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 26h 35m. Air Canada provides one of the quickest options available for as low as $825. 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 $794, United Airlines will fly you from Sydney to Seattle and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and Air Canada - these airlines can fly you to your destination from $802 and $828, respectively. United Airlines is 28% 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, January is the cheapest month in which you can book a flight from Sydney to Seattle (average of $238). Flying from Sydney to Seattle in June is currently the most expensive (average of $388). 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
Lacey
Ocean Shores
Lynnwood
Leavenworth
Renton
Olympia
Kent
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline
Federal Way
Shelton

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 Sydney to Seattle

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

Top 5 airlines flying from Sydney to Seattle

Discover the top 5 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 August 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$794Average$1,215FlexibilityNo cancel feeOn-time69%
DeltaCheapest$802Average$1,374FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$828Average$1,053FlexibilityNo cancel feeOn-time67%
Hawaiian AirlinesCheapest$960Average$1,452FlexibilityNo cancel feeOn-time85%
Qantas AirwaysCheapest$1,214Average$1,798FlexibilityNo cancel feeOn-time74%

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