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Cheap flights from Seattle to Sydney from C$ 700

SEA — SYD
4 Nov — 11 Nov1
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 25/1110:10 a.m. -
1 stop28h 25m
Wed 16/1211:20 a.m. -
1 stop26h 02m
Deal found 4/10C$ 1,529
Sun 18/106:30 a.m. -
1 stop31h 30m
Mon 2/1111:50 a.m. -
1 stop19h 30m
Deal found 3/10C$ 1,546
Sun 18/1011:05 a.m. -
2 stops26h 45m
Mon 2/1110:40 a.m. -
2 stops24h 44m
Deal found 4/10C$ 1,549
Sun 1/116:30 p.m. -
1 stop19h 35m
Tue 10/119:15 a.m. -
1 stop23h 10m
Deal found 4/10C$ 1,564
Sun 29/113:13 p.m. -
1 stop22h 17m
Mon 14/1210:40 a.m. -
1 stop23h 31m
Deal found 1/10C$ 1,566
Sat 28/119:20 p.m. -
1 stop40h 10m
Mon 14/1210:40 a.m. -
1 stop28h 39m
Deal found 1/10C$ 1,576
Mon 26/107:08 p.m. -
1 stop19h 52m
Fri 6/1111:10 a.m. -
1 stop20h 50m
Deal found 1/10C$ 1,628
Tue 3/1112:20 p.m. -
1 stop25h 45m
Sat 14/1111:20 a.m. -
1 stop18h 54m
Deal found 4/10C$ 1,636
Fri 27/117:35 p.m. -
1 stop18h 45m
Mon 14/1211:50 a.m. -
1 stop19h 28m
Deal found 1/10C$ 1,637

Find flight deals from Seattle to Sydney

Round-trip from

C$ 1,429

One-way from

C$ 700

Popular in

December

Cheapest in

August

Average price

C$ 1,534
Air Canada
  • Air Canada
  • 3/2-17/2
  • 2 total stops
  • 45h 32m total
  • Seattle to Sydney
Search Deals
16/11-31/12
  • 16/11-31/12
  • 1 total stop
  • 39h 37m total
  • Seattle to Sydney
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (C$ 557 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 138 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Seattle to Sydney that are best for you.

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Route

Depart

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Price

Cheapest round-trip

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$ 809

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 2/12

5:05 a.m.-9:05 a.m.

2 stops33h 00m

Sydney Kingsford Smith

Wed 31/12

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

Nonstop0h 00m

C$ 809

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Mon 2/11

8:30 a.m.-9:05 a.m.

2 stops29h 35m

Sydney Kingsford Smith

Wed 31/12

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

Nonstop0h 00m

C$ 809

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sun 15/11

11:59 p.m.-9:20 a.m.

2 stops38h 21m

Sydney Kingsford Smith

Wed 31/12

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

Nonstop0h 00m

C$ 809

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sat 14/11

12:20 p.m.-7:00 a.m.

3 stops47h 40m

Sydney Kingsford Smith

Wed 31/12

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

Nonstop0h 00m

C$ 817

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sat 31/10

3:49 p.m.-9:05 a.m.

2 stops47h 16m

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

Sat 31/10

5:44 p.m.-6:25 a.m.

1 stop42h 41m

Sydney Kingsford Smith

Wed 31/12

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

Nonstop0h 00m

C$ 867

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Fri 27/11

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$ 894

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Thu 19/11

7:55 p.m.-8:30 a.m.

2 stops65h 35m

Sydney Kingsford Smith

Wed 31/12

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

Nonstop0h 00m

C$ 931

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Thu 31/12

12:25 p.m.-6:25 a.m.

2 stops23h 00m

Sydney Kingsford Smith

Wed 31/12

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

Nonstop0h 00m

C$ 1,054

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/10

Showing 1-10 of 22 resultsSorted by cheapest first
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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, August is the cheapest month in which you can book a flight from Seattle to Sydney (average of C$ 1,146). Flying from Seattle to Sydney in December is currently the most expensive (average of C$ 2,719). 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$ 1,338 and C$ 1,691 in February.
The cheapest round-trip price found within the last 5 days was C$ 1,429 on Air Canada (3 Feb-17 Feb).

Related info for your journey

  • How long is the flight from Seattle to Sydney?

    A quick flight from Seattle to Sydney can take about 27h 38m. United Airlines provides one of the quickest options available for as low as C$ 1,641. 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, August is the cheapest month in which you can book a flight from Seattle to Sydney (average of C$ 1,146). Flying from Seattle to Sydney in December is currently the most expensive (average of C$ 2,719). 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

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

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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.

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