Find flights
When to book
FAQs

Cheap flights from Seattle to Sydney from C$ 769

SEA — SYD
4 Dec — 11 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Sydney

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Sydney

Wed 4/117:00 a.m. -
1 stop17h 45m
Tue 10/119:40 p.m. -
1 stop27h 28m
Deal found 31/10C$ 1,586
Wed 11/117:00 a.m. -
1 stop17h 45m
Fri 20/119:40 p.m. -
2 stops27h 20m
Deal found 1/11C$ 1,600
Tue 3/111:00 p.m. -
1 stop35h 45m
Tue 10/119:40 p.m. -
1 stop18h 45m
Deal found 31/10C$ 1,610
Tue 3/114:15 p.m. -
1 stop32h 30m
Sun 15/119:40 p.m. -
1 stop27h 28m
Deal found 31/10C$ 1,624
Sun 29/119:30 p.m. -
1 stop41h 20m
Fri 22/111:30 a.m. -
1 stop26h 15m
Deal found 4/11C$ 1,632
Mon 30/117:00 a.m. -
1 stop17h 45m
Mon 25/19:40 p.m. -
1 stop17h 40m
Deal found 4/11C$ 1,664
Wed 11/113:59 p.m. -
1 stop19h 26m
Wed 18/1111:10 a.m. -
1 stop22h 02m
Deal found 1/11C$ 1,666
Tue 1/125:42 p.m. -
1 stop20h 18m
Sat 12/127:05 a.m. -
2 stops28h 07m
Deal found 1/11C$ 1,667
Thu 5/117:00 a.m. -
1 stop17h 45m
Fri 20/119:40 p.m. -
2 stops20h 23m
Deal found 4/11C$ 1,669
Fri 6/117:00 a.m. -
1 stop17h 45m
Fri 13/119:40 p.m. -
1 stop27h 28m
Deal found 31/10C$ 1,670
Mon 16/117:05 a.m. -
1 stop28h 55m
Mon 23/1111:20 a.m. -
1 stop23h 52m
Deal found 3/11C$ 1,673
Wed 2/127:30 p.m. -
1 stop18h 50m
Wed 9/1211:20 a.m. -
3 stops31h 24m
Deal found 4/11C$ 1,678

Find flight deals from Seattle to Sydney

Round-trip from

C$ 1,516

One-way from

C$ 769

Popular in

December

Cheapest in

September

Average price

C$ 1,604
1/2-2/3
  • 1/2-2/3
  • 2 total stops
  • 36h 24m total
  • Seattle to Sydney
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 30/3-31/12
  • 1 total stop
  • 24h 30m total
  • Seattle to Sydney
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (C$ 495 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 133 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2026
Search Deals

Cheapflights Fare Finder

 
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

Price

Cheapest round-trip

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sat 20/2

11:31 a.m.-6:25 a.m.

2 stops23h 54m

Sydney Kingsford Smith

Wed 31/12

12:00 a.m.-6:00 a.m.

Nonstop0h 00m

C$ 811

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sat 6/2

11:25 a.m.-6:25 a.m.

2 stops24h 00m

Sydney Kingsford Smith

Wed 31/12

12:00 a.m.-6:00 a.m.

Nonstop0h 00m

C$ 811

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Fri 26/2

11:20 a.m.-6:25 a.m.

2 stops24h 05m

Sydney Kingsford Smith

Wed 31/12

12:00 a.m.-6:00 a.m.

Nonstop0h 00m

C$ 836
Quickest round-trip

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 2/12

11:50 a.m.-6:25 a.m.

2 stops23h 35m

Sydney Kingsford Smith

Wed 31/12

12:00 a.m.-6:00 a.m.

Nonstop0h 00m

C$ 838

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Mon 25/1

1:18 p.m.-9:20 a.m.

1 stop25h 02m

Sydney Kingsford Smith

Wed 31/12

12:00 a.m.-6:00 a.m.

Nonstop0h 00m

C$ 856

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 18/11

11:30 a.m.-8:30 a.m.

2 stops26h 00m

Sydney Kingsford Smith

Wed 31/12

12:00 a.m.-6:00 a.m.

Nonstop0h 00m

C$ 863

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 18/11

12:45 p.m.-9:05 a.m.

2 stops25h 20m

Sydney Kingsford Smith

Wed 31/12

12:00 a.m.-6:00 a.m.

Nonstop0h 00m

C$ 863

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sat 27/2

7:55 p.m.-6:50 a.m.

2 stops39h 55m

Sydney Kingsford Smith

Wed 31/12

12:00 a.m.-6:00 a.m.

Nonstop0h 00m

C$ 870

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sun 24/1

5:35 a.m.-6:50 a.m.

2 stops30h 15m

Sydney Kingsford Smith

Wed 31/12

12:00 a.m.-6:00 a.m.

Nonstop0h 00m

C$ 891

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sat 23/1

2:20 p.m.-6:20 a.m.

2 stops45h 00m

Sydney Kingsford Smith

Wed 31/12

12:00 a.m.-6:00 a.m.

Nonstop0h 00m

C$ 896

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/11

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Seattle to Sydney

How far ahead should I book a flight from Seattle to Sydney?

The best time to book flights from Seattle to Sydney is 23 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Seattle to Sydney?

Currently, September is the cheapest month in which you can book a flight from Seattle to Sydney (average of C$ 1,458). Flying from Seattle to Sydney in December is currently the most expensive (average of C$ 2,729). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Seattle to Sydney?

Airfare is typical for this route at the moment.

Seattle to Sydney flights typically cost between C$ 1,486 and C$ 1,829 in February.
The cheapest round-trip price found within the last 5 days was C$ 1,512 on Philippine Airlines (22 Feb-3 Mar).

Related info for your journey

  • How long is the flight from Seattle to Sydney?

    A quick flight from Seattle to Sydney can take about 18h 40m. Philippine Airlines provides one of the quickest options available for as low as C$ 1,666. Seattle and Sydney are separated by a distance of 12463 km. Both multi-stop and direct flights can be found to your destination and back.

  • Can I find deals for flights from Seattle to Sydney that include hotel bookings?

    Yes. In addition to deals on Seattle to Sydney flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Sydney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Sydney.

  • Can I find deals for business class flights from Seattle to Sydney?

    Yes. Cheapflights offers flight deals from Seattle to Sydney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Sydney?

    Currently, September is the cheapest month in which you can book a flight from Seattle to Sydney (average of C$ 1,458). Flying from Seattle to Sydney in December is currently the most expensive (average of C$ 2,729). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Bondi Beach
Parramatta

Browse thousands of different options on Cheapflights for your next trip

Fly with Cheapflights

How does Cheapflights help users find flights from Seattle to Sydney?

Cheapflights makes it easy to find Seattle to Sydney flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Sydney?

Cheapflights simply makes it quick and affordable to book flights from Seattle to Sydney by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Seattle to Sydney with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Seattle to Sydney flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Seattle to Sydney become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Sydney from Seattle today and book when prices fit your budget.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.