₩508,200 Cheap Flights from Seattle (SEA) to Sydney (SYD)

View ₩508,200 flight on Tue, Sep 9, 2025Opens in a new window

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

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Cheap Flights from Seattle to Sydney (SEA-SYD)

Prices were available within the past 7 days and start at ₩508,200 for one-way flights and ₩1,156,100 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Sep 9 - Fri, Sep 26
SEA
Seattle
SYD
Sydney
₩1,156,100 Roundtrip, found 17 hours ago
₩1,156,100
Roundtrip
found 17 hours ago
Select United flight, departing Tue, Sep 9 from Seattle to Sydney, returning Fri, Sep 26, priced at ₩1,156,100 found 17 hours ago
Delta
Tue, Sep 9 - Fri, Sep 26
SEA
Seattle
SYD
Sydney
₩1,156,500 Roundtrip, found 17 hours ago
₩1,156,500
Roundtrip
found 17 hours ago
Select Delta flight, departing Tue, Sep 9 from Seattle to Sydney, returning Fri, Sep 26, priced at ₩1,156,500 found 17 hours ago
Air Canada
Tue, Sep 9 - Fri, Sep 26
SEA
Seattle
SYD
Sydney
₩1,168,100 Roundtrip, found 17 hours ago
₩1,168,100
Roundtrip
found 17 hours ago
Select Air Canada flight, departing Tue, Sep 9 from Seattle to Sydney, returning Fri, Sep 26, priced at ₩1,168,100 found 17 hours ago
Alaska Airlines
Tue, Sep 9 - Fri, Sep 26
SEA
Seattle
SYD
Sydney
₩1,169,500 Roundtrip, found 17 hours ago
₩1,169,500
Roundtrip
found 17 hours ago
Select Alaska Airlines flight, departing Tue, Sep 9 from Seattle to Sydney, returning Fri, Sep 26, priced at ₩1,169,500 found 17 hours ago
Alaska Airlines
Tue, Sep 9 - Fri, Sep 26
SEA
Seattle
SYD
Sydney
₩1,170,800 Roundtrip, found 17 hours ago
₩1,170,800
Roundtrip
found 17 hours ago
Select Alaska Airlines flight, departing Tue, Sep 9 from Seattle to Sydney, returning Fri, Sep 26, priced at ₩1,170,800 found 17 hours ago
Qantas Airways
Tue, Sep 9 - Fri, Sep 26
SEA
Seattle
SYD
Sydney
₩1,187,600 Roundtrip, found 17 hours ago
₩1,187,600
Roundtrip
found 17 hours ago
Select Qantas Airways flight, departing Tue, Sep 9 from Seattle to Sydney, returning Fri, Sep 26, priced at ₩1,187,600 found 17 hours ago
Qantas Airways
Tue, Sep 9 - Fri, Sep 26
SEA
Seattle
SYD
Sydney
₩1,188,900 Roundtrip, found 17 hours ago
₩1,188,900
Roundtrip
found 17 hours ago
Select Qantas Airways flight, departing Tue, Sep 9 from Seattle to Sydney, returning Fri, Sep 26, priced at ₩1,188,900 found 17 hours ago
Qantas Airways
Tue, Sep 9 - Fri, Sep 26
SEA
Seattle
SYD
Sydney
₩1,205,700 Roundtrip, found 17 hours ago
₩1,205,700
Roundtrip
found 17 hours ago
Select Qantas Airways flight, departing Tue, Sep 9 from Seattle to Sydney, returning Fri, Sep 26, priced at ₩1,205,700 found 17 hours ago
Qantas Airways
Tue, Sep 9 - Fri, Sep 26
SEA
Seattle
SYD
Sydney
₩1,207,000 Roundtrip, found 17 hours ago
₩1,207,000
Roundtrip
found 17 hours ago
Select Qantas Airways flight, departing Tue, Sep 9 from Seattle to Sydney, returning Fri, Sep 26, priced at ₩1,207,000 found 17 hours ago
Air Canada
Tue, Sep 9 - Fri, Sep 26
SEA
Seattle
SYD
Sydney
₩1,269,600 Roundtrip, found 17 hours ago
₩1,269,600
Roundtrip
found 17 hours ago
Select Air Canada flight, departing Tue, Sep 9 from Seattle to Sydney, returning Fri, Sep 26, priced at ₩1,269,600 found 17 hours ago

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

August is typically the cheapest month to fly

From ₩997,938 - ₩2,363,775 per traveler.

Graph displaying average flight prices per month

Flights from Seattle (SEA) to Sydney (SYD)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Kingsford Smith Intl.
Airlines serving
Air Canada, Air New Zealand, Asiana Airlines, China Airlines, Delta, Emirates, Hawaiian Airlines, Qantas Airways, Qatar Airways, Turkish Airlines, United
Roundtrip price
₩1,156,100
Distance
12399 km

Seattle to Sydney Flights

Sometimes you just need to get out of town or maybe you’re looking for a change of scenery. Regardless of the reason, a flight from Seattle to Sydney will do just the trick! Go on, plan to see all the famous landmarks and eat your weight in the local cuisine. Your trip is beckoning, so answer the call by packing your suitcase and filling your travel itinerary with exploring Sydney.

Whether you’re flying for business or jet-setting on your personal time, you’ve come to the right place. Here at Expedia.com, we’ll pair you up with SEA to SYD flights that won’t make your bank account wince. Ready to temporarily leave behind Seattle for new horizons? Browse through our cheap airfare, and filter by flight times and dates until you find just what you had in mind. From flights without layovers to ones that arrive early in the morning, you’ll come across plane tickets that suit your travel preferences. You can even bundle your flight to SYD with hotels and car rentals to score even bigger savings.

All set to hit the clouds? Book your travel arrangements with us today and have left-over money to put toward your travel outings and adventures.

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 ₩1,156,100. 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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