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$439+ 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 9/17. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — SEA
Aug 2 — Aug 91
Sat 8/2
Sat 8/9
1 adult, Economy
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Cheapflights Tip: The best prices from Sydney Kingsford Smith to Seattle/Tacoma Intl are usually found in February or October, 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 July 28, 2025.

Round-trip from

$812
(Air Canada)

One-way from

$439
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,252
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 ($104 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 28, 2025.

This Air Canada deal was found by Cheapflights users on 7/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/19:20 amSYD - SEA
1 stop17h 01mMultiple Airlines
Sat 8/97:15 pmSEA - SYD
2 stops22h 35mMultiple Airlines
Deal found 7/27$806
This Air Canada deal was found by Cheapflights users on 7/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/207:00 amSYD - SEA
2 stops23h 06mAir Canada
Fri 8/297:15 pmSEA - SYD
2 stops22h 25mAir Canada
Deal found 7/27$812
This American Airlines deal was found by Cheapflights users on 7/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/89:10 amSYD - SEA
2 stops24h 48mAmerican Airlines
Tue 9/233:23 pmSEA - SYD
1 stop22h 42mAmerican Airlines
Deal found 7/27$823
This United Airlines deal was found by Cheapflights users on 7/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/39:30 amSYD - SEA
1 stop21h 00mUnited Airlines
Fri 9/1912:43 pmSEA - SYD
2 stops25h 17mUnited Airlines
Deal found 7/27$840
This Delta deal was found by Cheapflights users on 7/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/19:25 amSYD - SEA
2 stops24h 16mDelta
Thu 8/141:30 pmSEA - SYD
2 stops24h 05mDelta
Deal found 7/27$853
This FlightHub deal was found by Cheapflights users on 7/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2010:30 amSYD - SEA
1 stop22h 25mAsiana Airlines
Thu 11/2712:10 amSEA - SYD
1 stop37h 20mAsiana Airlines
Deal found 7/27$923
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/69:40 pmSYD - SEA
2 stops25h 55mAlaska Airlines
Wed 9/178:25 amSEA - SYD
1 stop18h 20mAlaska Airlines
Deal found 7/27$928

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 28, 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 8/20

7:00 am-1:06 pm

2 stops23h 06m

Seattle/Tacoma Intl

Fri 8/29

7:15 pm-10:40 am

2 stops22h 25m

$812

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Wed 8/20

6:30 am-9:21 am

2 stops19h 51m

Seattle/Tacoma Intl

Thu 8/28

1:05 pm-7:20 am

2 stops25h 15m

$820

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Mon 9/8

9:10 am-2:49 pm

1 stop22h 39m

Seattle/Tacoma Intl

Sat 9/20

3:23 pm-7:05 am

1 stop22h 42m

$823

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Wed 9/3

9:30 am-1:30 pm

1 stop21h 00m

Seattle/Tacoma Intl

Mon 9/22

12:43 pm-6:55 am

2 stops25h 12m

$840

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sun 9/7

9:25 am-6:25 pm

2 stops26h 00m

Seattle/Tacoma Intl

Thu 9/18

1:30 pm-6:35 am

2 stops24h 05m

$853

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Thu 11/20

10:30 am-1:55 pm

1 stop22h 25m

Seattle/Tacoma Intl

Thu 11/27

12:10 am-8:30 am

1 stop37h 20m

$923

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sat 9/6

9:40 pm-6:35 am

2 stops25h 55m

Seattle/Tacoma Intl

Wed 9/17

8:25 am-7:45 pm

1 stop18h 20m

$928

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sat 10/11

11:20 am-2:24 pm

1 stop21h 04m

Seattle/Tacoma Intl

Tue 1/13

12:50 pm-6:20 am

1 stop22h 30m

$1,038

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Wed 9/17

4:20 pm-10:59 pm

2 stops23h 39m

$439

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Tue 11/4

11:20 am-7:16 pm

1 stop26h 56m

$473

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/25

Showing 1-10 of 15 results
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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 July 25, 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, 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 $389). 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 July 28, 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.

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 July 28, 2025.
Read through reviews of airlines operating flights from Sydney to Seattle, such as Asiana Airlines, Alaska Airlines, and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Asiana Airlines
8.2
Very good
463 reviews

Crew

8.5

Comfort

8.1

Boarding

8.4

Food

8.0

Overall

8.2

Entertainment

7.7

Reviews

1 / 20
10.0
Excellent

Jacob,Jul 2025

ICN - JFK

I flew business calls Asiana, everything was great and good! I must say that the service at the Asian business class lounge prior to the flight is very poor, the staff are very cold and not welcome and I asked for some help in getting a food without salt ...I was looked upon as if I ... I am traveling a lot business , and I se people complained a lot in asiana lounge services. Jacob
Asiana Airlines
8.2
Very good
463 reviews
Asiana Airlines
8.2
Very good
463 reviews

Crew

8.5

Comfort

8.1

Boarding

8.4

Food

8.0

Overall

8.2

Entertainment

7.7

Reviews

1 / 20
10.0
Excellent

Jacob,Jul 2025

ICN - JFK

I flew business calls Asiana, everything was great and good! I must say that the service at the Asian business class lounge prior to the flight is very poor, the staff are very cold and not welcome and I asked for some help in getting a food without salt ...I was looked upon as if I ... I am traveling a lot business , and I se people complained a lot in asiana lounge services. Jacob
Alaska Airlines
8.0
Very good
10,000 reviews
Asiana Airlines
8.2
Very good
463 reviews

Crew

8.5

Comfort

8.1

Boarding

8.4

Food

8.0

Overall

8.2

Entertainment

7.7

Reviews

1 / 20
10.0
Excellent

Jacob,Jul 2025

ICN - JFK

I flew business calls Asiana, everything was great and good! I must say that the service at the Asian business class lounge prior to the flight is very poor, the staff are very cold and not welcome and I asked for some help in getting a food without salt ...I was looked upon as if I ... I am traveling a lot business , and I se people complained a lot in asiana lounge services. Jacob
Delta
8.0
Very good
7,971 reviews
Asiana Airlines
8.2
Very good
463 reviews

Crew

8.5

Comfort

8.1

Boarding

8.4

Food

8.0

Overall

8.2

Entertainment

7.7

Reviews

1 / 20
10.0
Excellent

Jacob,Jul 2025

ICN - JFK

I flew business calls Asiana, everything was great and good! I must say that the service at the Asian business class lounge prior to the flight is very poor, the staff are very cold and not welcome and I asked for some help in getting a food without salt ...I was looked upon as if I ... I am traveling a lot business , and I se people complained a lot in asiana lounge services. Jacob
Virgin Australia
7.5
Good
411 reviews
Asiana Airlines
8.2
Very good
463 reviews

Crew

8.5

Comfort

8.1

Boarding

8.4

Food

8.0

Overall

8.2

Entertainment

7.7

Reviews

1 / 20
10.0
Excellent

Jacob,Jul 2025

ICN - JFK

I flew business calls Asiana, everything was great and good! I must say that the service at the Asian business class lounge prior to the flight is very poor, the staff are very cold and not welcome and I asked for some help in getting a food without salt ...I was looked upon as if I ... I am traveling a lot business , and I se people complained a lot in asiana lounge services. Jacob
United Airlines
7.4
Good
8,886 reviews
Asiana Airlines
8.2
Very good
463 reviews

Crew

8.5

Comfort

8.1

Boarding

8.4

Food

8.0

Overall

8.2

Entertainment

7.7

Reviews

1 / 20
10.0
Excellent

Jacob,Jul 2025

ICN - JFK

I flew business calls Asiana, everything was great and good! I must say that the service at the Asian business class lounge prior to the flight is very poor, the staff are very cold and not welcome and I asked for some help in getting a food without salt ...I was looked upon as if I ... I am traveling a lot business , and I se people complained a lot in asiana lounge services. Jacob

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.

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

    Currently priced at $812, 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 American Airlines and United Airlines - these airlines can fly you to your destination from $823 and $840, respectively. Air Canada is 26% 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 Air Canada, with whom users have recently found tickets for as low as $473. However, be on the lookout for offers from American Airlines and United Airlines, 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, 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 $389). 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
Ocean Shores
Lakewood
Lynnwood
Lacey
Leavenworth
Renton
Olympia
Puyallup
Kent
Cle Elum
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline
Federal Way
Shelton

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 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 July 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$794Average$1,215FlexibilityNo cancel feeOn-time69%
DeltaCheapest$802Average$1,374FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$848Average$1,053FlexibilityNo cancel feeOn-time67%
Hawaiian AirlinesCheapest$960Average$1,391FlexibilityNo cancel feeOn-time85%
Qantas AirwaysCheapest$1,214Average$1,798FlexibilityNo cancel feeOn-time74%

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