Cheap Flights from Seattle (SEA) to Sydney (SYD) from HK$4,841~

View HK$4,841 flight on Sat, 14 Mar 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$4,841 for one-way flights and HK$8,751 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Sat, 14 Mar - Tue, 17 Mar
SEA
Seattle
SYD
Sydney
HK$8,751 Return, found 11 hours ago
HK$8,751
Return
found 11 hours ago
Select Air Canada flight, departing Sat, 14 Mar from Seattle to Sydney, returning Tue, 17 Mar, priced at HK$8,751 found 11 hours ago
Air Canada
Sat, 14 Mar - Tue, 17 Mar
SEA
Seattle
SYD
Sydney
HK$8,910 Return, found 11 hours ago
HK$8,910
Return
found 11 hours ago
Select Air Canada flight, departing Sat, 14 Mar from Seattle to Sydney, returning Tue, 17 Mar, priced at HK$8,910 found 11 hours ago
Delta
Sat, 14 Mar - Tue, 17 Mar
SEA
Seattle
SYD
Sydney
HK$9,685 Return, found 11 hours ago
HK$9,685
Return
found 11 hours ago
Select Delta flight, departing Sat, 14 Mar from Seattle to Sydney, returning Tue, 17 Mar, priced at HK$9,685 found 11 hours ago
Qantas Airways
Sat, 14 Mar - Tue, 17 Mar
SEA
Seattle
SYD
Sydney
HK$9,858 Return, found 11 hours ago
HK$9,858
Return
found 11 hours ago
Select Qantas Airways flight, departing Sat, 14 Mar from Seattle to Sydney, returning Tue, 17 Mar, priced at HK$9,858 found 11 hours ago
Qantas Airways
Sat, 14 Mar - Tue, 17 Mar
SEA
Seattle
SYD
Sydney
HK$9,960 Return, found 11 hours ago
HK$9,960
Return
found 11 hours ago
Select Qantas Airways flight, departing Sat, 14 Mar from Seattle to Sydney, returning Tue, 17 Mar, priced at HK$9,960 found 11 hours ago
United
Sat, 14 Mar - Tue, 17 Mar
SEA
Seattle
SYD
Sydney
HK$10,075 Return, found 11 hours ago
HK$10,075
Return
found 11 hours ago
Select United flight, departing Sat, 14 Mar from Seattle to Sydney, returning Tue, 17 Mar, priced at HK$10,075 found 11 hours ago
American Airlines
Sat, 14 Mar - Tue, 17 Mar
SEA
Seattle
SYD
Sydney
HK$10,076 Return, found 11 hours ago
HK$10,076
Return
found 11 hours ago
Select American Airlines flight, departing Sat, 14 Mar from Seattle to Sydney, returning Tue, 17 Mar, priced at HK$10,076 found 11 hours ago
Air Canada
Sat, 14 Mar - Tue, 17 Mar
SEA
Seattle
SYD
Sydney
HK$10,078 Return, found 11 hours ago
HK$10,078
Return
found 11 hours ago
Select Air Canada flight, departing Sat, 14 Mar from Seattle to Sydney, returning Tue, 17 Mar, priced at HK$10,078 found 11 hours ago
American Airlines
Sat, 14 Mar - Tue, 17 Mar
SEA
Seattle
SYD
Sydney
HK$10,120 Return, found 11 hours ago
HK$10,120
Return
found 11 hours ago
Select American Airlines flight, departing Sat, 14 Mar from Seattle to Sydney, returning Tue, 17 Mar, priced at HK$10,120 found 11 hours ago
American Airlines
Sat, 14 Mar - Tue, 17 Mar
SEA
Seattle
SYD
Sydney
HK$10,125 Return, found 11 hours ago
HK$10,125
Return
found 11 hours ago
Select American Airlines flight, departing Sat, 14 Mar from Seattle to Sydney, returning Tue, 17 Mar, priced at HK$10,125 found 11 hours 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.
Seattle to Sydney route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Kingsford Smith Intl.
Airlines serving
Air Canada, All Nippon Airways, American Airlines, Delta, Emirates, Korean Air, Qantas Airways, Qatar Airways, United
Return price
HK$8,751
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$4,841 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$8,751. 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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