Cheap Flights from Seattle (SEA) to Sydney (SYD) from HK$3,993~

View HK$3,993 flight on Mon, 9 Mar 2026Opens in a new window

Popular airlines from Seattle to Sydney, NSW (SYD-Kingsford Smith Intl.)

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Find Cheap Flights from Seattle (SEA) to Sydney (SYD)

Prices were available within the past 7 days and start at HK$3,993 for one-way flights and HK$8,526 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Tue, 3 Feb - Tue, 10 Feb
SEA
Seattle
SYD
Sydney
HK$8,526 Return, found 1 day ago
HK$8,526
Return
found 1 day ago
Select Air Canada flight, departing Tue, 3 Feb from Seattle to Sydney, returning Tue, 10 Feb, priced at HK$8,526 found 1 day ago
Air Canada
Tue, 3 Feb - Tue, 10 Feb
SEA
Seattle
SYD
Sydney
HK$8,686 Return, found 1 day ago
HK$8,686
Return
found 1 day ago
Select Air Canada flight, departing Tue, 3 Feb from Seattle to Sydney, returning Tue, 10 Feb, priced at HK$8,686 found 1 day ago
Air Canada
Tue, 3 Feb - Tue, 10 Feb
SEA
Seattle
SYD
Sydney
HK$8,697 Return, found 1 day ago
HK$8,697
Return
found 1 day ago
Select Air Canada flight, departing Tue, 3 Feb from Seattle to Sydney, returning Tue, 10 Feb, priced at HK$8,697 found 1 day ago
Air Canada
Tue, 3 Feb - Tue, 10 Feb
SEA
Seattle
SYD
Sydney
HK$8,860 Return, found 1 day ago
HK$8,860
Return
found 1 day ago
Select Air Canada flight, departing Tue, 3 Feb from Seattle to Sydney, returning Tue, 10 Feb, priced at HK$8,860 found 1 day ago
Alaska Airlines
Sun, 25 Jan - Tue, 3 Feb
SEA
Seattle
SYD
Sydney
HK$8,967 Return, found 2 days ago
HK$8,967
Return
found 2 days ago
Select Alaska Airlines flight, departing Sun, 25 Jan from Seattle to Sydney, returning Tue, 3 Feb, priced at HK$8,967 found 2 days ago
Hawaiian Airlines
Mon, 16 Mar - Thu, 19 Mar
SEA
Seattle
SYD
Sydney
HK$8,967 Return, found 2 days ago
HK$8,967
Return
found 2 days ago
Select Hawaiian Airlines flight, departing Mon, 16 Mar from Seattle to Sydney, returning Thu, 19 Mar, priced at HK$8,967 found 2 days ago
United
Tue, 3 Feb - Tue, 10 Feb
SEA
Seattle
SYD
Sydney
HK$8,980 Return, found 1 day ago
HK$8,980
Return
found 1 day ago
Select United flight, departing Tue, 3 Feb from Seattle to Sydney, returning Tue, 10 Feb, priced at HK$8,980 found 1 day ago
United
Tue, 3 Feb - Tue, 10 Feb
SEA
Seattle
SYD
Sydney
HK$8,982 Return, found 1 day ago
HK$8,982
Return
found 1 day ago
Select United flight, departing Tue, 3 Feb from Seattle to Sydney, returning Tue, 10 Feb, priced at HK$8,982 found 1 day ago
United
Sun, 25 Jan - Wed, 4 Feb
SEA
Seattle
SYD
Sydney
HK$8,983 Return, found 2 days ago
HK$8,983
Return
found 2 days ago
Select United flight, departing Sun, 25 Jan from Seattle to Sydney, returning Wed, 4 Feb, priced at HK$8,983 found 2 days ago
Delta
Tue, 3 Feb - Tue, 10 Feb
SEA
Seattle
SYD
Sydney
HK$9,024 Return, found 1 day ago
HK$9,024
Return
found 1 day ago
Select Delta flight, departing Tue, 3 Feb from Seattle to Sydney, returning Tue, 10 Feb, priced at HK$9,024 found 1 day ago

Find the cheapest month to fly from Seattle (SEA) to Sydney (SYD)

May is typically the cheapest month to fly

From HK$4,823 - HK$9,560 per traveller.

Frequently asked questions

How much is a flight from SEA to SYD?
Based on fares listed within the last 7 days on Expedia for flights departing within the next year, round-trip flights between Seattle - Tacoma Intl. Airport (SEA) and Kingsford Smith Intl. Airport (SYD) start from HK$8,526. Make your booking ASAP to secure the best price for your big adventure. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from SEA to Sydney Airport?
This varies from airline to airline, as each has its own terms and conditions. Head to the Customer Service Portal, where there are easy-to-follow instructions on how to cancel your flight online.
How do I find cheap flights from Sea-Tac Airport to Mascot Airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Seattle - Tacoma Intl. Airport (SEA) to SYD flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Sea-Tac Airport to Kingsford Smith Intl. Airport (SYD)?
The distance is around 12,500 kilometers. Eye mask? Check. Noise-canceling headphones? Double check. You'd be wise to pack all the essentials for this long-haul SeaTac to Sydney flight.
Which airlines fly direct from SEA to Mascot Airport?
Unfortunately, there are no airlines that directly fly between Seattle - Tacoma Intl. Airport (SEA) and SYD. You'll have to book a flight with at least one stop.
Are SEA to SYD flight tickets cheaper when they're purchased at the last minute?
Booking your trip from Seattle - Tacoma Intl. Airport (SEA) to SYD at the last minute could be your ticket to an awesome deal. However, it might cost you a whole lot more! If you'd prefer not to take any chances, book well ahead of your departure date. In fact, Expedia has some of the biggest bargains as far ahead as 12 months in advance. If your preferred carrier hasn't released tickets yet, check back regularly as deals are updated all the time on Expedia.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Kingsford Smith Intl.
Airlines serving
Air Canada, Air New Zealand, All Nippon Airways, American Airlines, Asiana Airlines, British Airways, Delta, Emirates, Qantas Airways, Qatar Airways, Turkish Airlines, United
Return price
HK$8,526
Distance
12399 km

Book with confidence

Flights from Seattle to Sydney

Book cheap flights from Seattle (SEA) to Sydney (SYD) on Expedia.com.hk. Find the best flight deals to destinations around the world for your next leisure or business travel on Expedia.com.hk.

Search for flights from Seattle (SEA) to Sydney (SYD) to find great flight deals suitable to your travel date and time. Expedia.com.hk flight booking search engine is simple to use and looking for cheap flights is as easy as a click of a mouse or on your mobile devices.

Be assured that you’re seeing the best price guaranteed! Our friendly customer service representatives are here to serve you 24 hours day to provide assistance and answer any questions that you may have about booking your Seattle (SEA) to Sydney (SYD) trip. Call us at 3077-4857 (direct number - 24 hours day for English).

Save more when combine your Sydney flight with a hotel for a package deal! Discover additional savings by booking in advance. Now you can find activities in Sydney and things to do in Sydney for your perfect vacation with Expedia Thing to Do.

If you would like to book flights to Sydney more flexibly, many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Sydney is HK$3,993 now!

 

Flights from Seattle to Sydney

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