Cheap Flights from Seattle (SEA) to Sydney (SYD) from HK$5,001~

View HK$5,001 flight on Tue, 21 Apr 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Sydney Airport (SYD)

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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$5,001 for one-way flights and HK$9,383 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Fri, 13 Mar - Fri, 20 Mar
SEA
Seattle
SYD
Sydney
HK$9,383 Return, found 6 days ago
HK$9,383
Return
found 6 days ago
Select Alaska Airlines flight, departing Fri, 13 Mar from Seattle to Sydney, returning Fri, 20 Mar, priced at HK$9,383 found 6 days ago
Delta
Tue, 21 Apr - Fri, 24 Apr
SEA
Seattle
SYD
Sydney
HK$9,407 Return, found 1 day ago
HK$9,407
Return
found 1 day ago
Select Delta flight, departing Tue, 21 Apr from Seattle to Sydney, returning Fri, 24 Apr, priced at HK$9,407 found 1 day ago
Air Canada
Tue, 21 Apr - Fri, 24 Apr
SEA
Seattle
SYD
Sydney
HK$9,443 Return, found 1 day ago
HK$9,443
Return
found 1 day ago
Select Air Canada flight, departing Tue, 21 Apr from Seattle to Sydney, returning Fri, 24 Apr, priced at HK$9,443 found 1 day ago
United
Tue, 21 Apr - Fri, 24 Apr
SEA
Seattle
SYD
Sydney
HK$9,485 Return, found 1 day ago
HK$9,485
Return
found 1 day ago
Select United flight, departing Tue, 21 Apr from Seattle to Sydney, returning Fri, 24 Apr, priced at HK$9,485 found 1 day ago
Delta
Mon, 16 Feb - Sat, 21 Feb
SEA
Seattle
SYD
Sydney
HK$9,487 Return, found 5 days ago
HK$9,487
Return
found 5 days ago
Select Delta flight, departing Mon, 16 Feb from Seattle to Sydney, returning Sat, 21 Feb, priced at HK$9,487 found 5 days ago
Alaska Airlines
Tue, 21 Apr - Fri, 24 Apr
SEA
Seattle
SYD
Sydney
HK$9,489 Return, found 1 day ago
HK$9,489
Return
found 1 day ago
Select Alaska Airlines flight, departing Tue, 21 Apr from Seattle to Sydney, returning Fri, 24 Apr, priced at HK$9,489 found 1 day ago
Qantas Airways
Tue, 21 Apr - Fri, 24 Apr
SEA
Seattle
SYD
Sydney
HK$9,683 Return, found 1 day ago
HK$9,683
Return
found 1 day ago
Select Qantas Airways flight, departing Tue, 21 Apr from Seattle to Sydney, returning Fri, 24 Apr, priced at HK$9,683 found 1 day ago
Philippine Airlines
Fri, 13 Mar - Fri, 20 Mar
SEA
Seattle
SYD
Sydney
HK$11,415 Return, found 6 days ago
HK$11,415
Return
found 6 days ago
Select Philippine Airlines flight, departing Fri, 13 Mar from Seattle to Sydney, returning Fri, 20 Mar, priced at HK$11,415 found 6 days ago
Turkish Airlines
Fri, 13 Mar - Fri, 20 Mar
SEA
Seattle
SYD
Sydney
HK$11,879 Return, found 6 days ago
HK$11,879
Return
found 6 days ago
Select Turkish Airlines flight, departing Fri, 13 Mar from Seattle to Sydney, returning Fri, 20 Mar, priced at HK$11,879 found 6 days ago
American Airlines
Tue, 21 Apr - Fri, 24 Apr
SEA
Seattle
SYD
Sydney
HK$12,311 Return, found 1 day ago
HK$12,311
Return
found 1 day ago
Select American Airlines flight, departing Tue, 21 Apr from Seattle to Sydney, returning Fri, 24 Apr, priced at HK$12,311 found 1 day ago
Seattle to Sydney route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Kingsford Smith Intl.
Airlines serving
Air Canada, All Nippon Airways, American Airlines, Asiana Airlines, Cathay Pacific, China Airlines, Delta, Emirates, Korean Air, Philippine Airlines, Qantas Airways, Qatar Airways, Singapore Airlines, United
Return price
HK$9,383
Distance
12399 km

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$5,001 now!

 

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$9,383. 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.

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