$429+ Cheap flights from Seattle (SEA) to Sydney, NS (YQY)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YQY
Oct 9 — Oct 161
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Sydney 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.Cheap flight deals from Seattle to Sydney
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Best
Last-minute
One-way
Cheapest flights from Seattle to SydneyExplore the most affordable flight options available from Seattle to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 9, 2026.
Explore the most affordable flight options available from Seattle to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 9, 2026.
This Air Canada deal was found by Cheapflights users on 9/4. 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 10/308:40 am -
2 stops11h 46m
Tue 11/35:45 am -
2 stops19h 14m
Deal found 9/4![Air Canada logo]()
$922
This Air Canada deal was found by Cheapflights users on 9/6. 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 10/217:55 am -
1 stop12h 50m
Wed 10/285:45 am -
2 stops19h 14m
Deal found 9/6![Air Canada logo]()
$951
This Air Canada deal was found by Cheapflights users on 9/6. 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.
Mon 10/57:55 am -
1 stop12h 50m
Mon 10/125:05 am -
1 stop19h 59m
Deal found 9/6![Air Canada logo]()
$1,222
Best flights from Seattle to SydneyDiscover carefully curated flight deals from Seattle to Sydney that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 9, 2026.
Discover carefully curated flight deals from Seattle to Sydney that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 9, 2026.
This Air Canada deal was found by Cheapflights users on 9/5. 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 10/308:40 am -
2 stops11h 46m
Tue 11/35:45 am -
2 stops19h 14m
Deal found 9/5![Air Canada logo]()
$922
This Air Canada deal was found by Cheapflights users on 9/6. 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 10/217:55 am -
1 stop12h 50m
Wed 10/285:45 am -
2 stops19h 14m
Deal found 9/6![Air Canada logo]()
$951
This Air Canada deal was found by Cheapflights users on 9/6. 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.
Mon 10/57:55 am -
1 stop12h 50m
Mon 10/125:05 am -
1 stop19h 59m
Deal found 9/6![Air Canada logo]()
$1,222
Last-minute flights from Seattle to SydneyDiscover last-minute flight deals from Seattle to Sydney. Data last updated September 9, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Sydney. Data last updated September 9, 2026 and is based on user searches.
This Air Canada deal was found by Cheapflights users on 9/6. 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.
Mon 10/57:55 am -
1 stop12h 50m
Mon 10/125:05 am -
1 stop19h 59m
Deal found 9/6![Air Canada logo]()
$1,222
This Air Canada deal was found by Cheapflights users on 9/6. 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 10/217:55 am -
1 stop12h 50m
Wed 10/285:45 am -
2 stops19h 14m
Deal found 9/6![Air Canada logo]()
$951
This Air Canada deal was found by Cheapflights users on 9/4. 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 10/308:40 am -
2 stops11h 46m
Tue 11/35:45 am -
2 stops19h 14m
Deal found 9/4![Air Canada logo]()
$922
One-way flights from Seattle to SydneySearch for one-way flight options from Seattle to Sydney. Find affordable one-way fares based on user searches. Data last updated September 9, 2026.
Search for one-way flight options from Seattle to Sydney. Find affordable one-way fares based on user searches. Data last updated September 9, 2026.
This Air Canada deal was found by Cheapflights users on 9/8. 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.
Fri 10/237:15 pm -
2 stops25h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Air Canada logo]()
$429
Find flight deals from Seattle to Sydney
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Sydney (YQY). 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 September 9, 2026.
Most accurate provider | Expedia 1 star |
|---|---|
Most trusted provider | Expedia 3 stars |
Round-trip from | $922 (Air Canada) |
One-way from | $429 (Air Canada) |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Sydney 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 7,457,451 searches. Data last updated September 9, 2026.
Use the filters below to find and compare flights from Seattle to Sydney that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
SeattleSydney
SEA Seattle/Tacoma Intl - YQY Sydney
SEAYQY
Seattle/Tacoma Intl
Fri 10/23
7:15 pm-12:41 am
2 stops25h 26m
Sydney
Wed 12/31
12:00 am-8:00 pm
Nonstop0h 00m
$429
SeattleSydney
SEA Seattle/Tacoma Intl - YQY Sydney
SEAYQY
Seattle/Tacoma Intl
Fri 10/30
8:40 am-12:26 am
2 stops11h 46m
Sydney
Tue 11/3
5:45 am-8:59 pm
2 stops19h 14m
$922
SeattleSydney
SEA Seattle/Tacoma Intl - YQY Sydney
SEAYQY
Seattle/Tacoma Intl
Wed 10/21
7:55 am-12:45 am
1 stop12h 50m
Sydney
Wed 10/28
5:45 am-8:59 pm
2 stops19h 14m
$951
SeattleSydney
SEA Seattle/Tacoma Intl - YQY Sydney
SEAYQY
Seattle/Tacoma Intl
Mon 10/5
7:55 am-12:45 am
1 stop12h 50m
Sydney
Mon 10/12
5:05 am-9:04 pm
1 stop19h 59m
$1,222
Sorted by cheapest first
- Most accurate provider: When it comes to deals on Seattle-Sydney, Nova Scotia flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Seattle-Sydney, Nova Scotia flight deals on Cheapflights vs. Expedia <90% of the time. Price accuracy is based on data collected from Seattle-Sydney, Nova Scotia flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-Sydney, Nova Scotia flights, Cheapflights users trust Expedia the most. Expedia 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 Seattle-Sydney, Nova Scotia 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 Seattle to Sydney
Have a flexible travel schedule? Discover the best time to fly to Sydney from Seattle with our price prediction graph.
SEA-YQY
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.
Related info for your journey
Find useful and relevant information for your journey from Seattle to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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