What’s the fastest stopover option from Seattle to Sydney?

Flights via Nadi (NAN) have the shortest average one-way travel time for one-stop routes: 18h 55m.

What’s the top stopover airport for flights from Seattle to Sydney?

Vancouver (YVR) – chosen by Cheapflights users on 75% of one-stop itineraries from Seattle to Sydney on Cheapflights.

Which airport typically offers the quickest stopover for flights from Seattle to Sydney?

Flights via Los Angeles (LAX) offer the fastest connection on this route, with an average stopover time of 2h 13m.

What’s the cheapest stopover airport for flights from Seattle to Sydney?

Nadi (NAN) is the most affordable one-stop option, with an average return flight price of $1,050.

How long is the flight from Seattle to Sydney?

Delta and Qantas Airways can get you from Seattle to Sydney in just under 24h 47m. Your travel time can differ by up to 7h 08m. Airlines will cover a distance of 12463 km. Both multi-stop and direct flights can be found to your destination and back.

In terms of precipitation, rainfall in Sydney ranges from 50.0 - 130.0 inches per month. March is typically the wettest month, when rainfall can reach 130.0 mm. September is typically the driest time to visit Sydney when rainfall is around 50.0 mm.

If weather is an important factor for your trip to Sydney, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 22.0 C. Travellers hoping to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 11.0 C).

What is the cheapest time of day to fly from SEA to SYD?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Sydney as you normally would.

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 holiday 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.

$696+ Cheap Flights from Seattle to Sydney

Cheap flight deals from Seattle to Sydney

Enter your travel dates to find the best prices.

Cheapest

Best

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Cheapest flights from Seattle to Sydney
Explore the most affordable flight options available from Seattle to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 October 2026.

Sun 8/1115:15 -

1 stop23h 20m

Sun 15/1111:20 -

1 stop17h 12m

Deal found 12/10$1,434

Tue 10/1110:10 -

1 stop28h 25m

Tue 17/1111:20 -

1 stop22h 12m

Deal found 10/10$1,437

Sun 8/1110:10 -

1 stop28h 25m

Sun 15/1106:20 -

2 stops22h 12m

Deal found 9/10$1,450

Mon 19/1019:15 -

2 stops23h 25m

Mon 2/1111:20 -

1 stop17h 12m

Deal found 7/10$1,456

Wed 25/1115:15 -

1 stop23h 20m

Wed 2/1208:30 -

2 stops20h 02m

Deal found 11/10$1,457

Mon 19/1016:37 -

1 stop21h 28m

Mon 2/1111:15 -

1 stop21h 57m

Deal found 7/10$1,460

Mon 9/1119:05 -

2 stops24h 35m

Mon 16/1111:20 -

1 stop22h 17m

Deal found 11/10$1,466

Sat 7/1119:05 -

2 stops25h 00m

Sun 15/1111:20 -

1 stop22h 17m

Deal found 9/10$1,477

Find flight deals from Seattle to Sydney

Round-trip from	$1,424
One-way from	$696
Popular in	December
Cheapest in	August
Average price	$1,567

Air Canada
18/3-22/3
2 total stops
54h 25m total
Seattle to Sydney

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Philippine Airlines
5/4-31/12
1 total stop
40h 50m total
Seattle to Sydney

Search Deals

Highest demand for flights based on searches. 17% potential increase in price ($517 potential increase over avg. return price).

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Cheapest flight prices on average. 5% potential price decrease ($127 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 2026

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Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 18/11

15:48-06:25

1 stop19h 37m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$810

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Tue 24/11

08:30-09:05

2 stops29h 35m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$812

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Mon 15/2

05:45-08:30

2 stops31h 45m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$812

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Mon 7/12

12:50-09:20

2 stops25h 30m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$812

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sun 14/2

14:30-08:30

1 stop23h 00m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$812

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 18/11

05:05-07:00

2 stops30h 55m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$812

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Tue 16/2

14:30-08:30

1 stop23h 00m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$812

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 18/11

05:35-08:30

2 stops31h 55m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$812

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sun 22/11

08:30-09:20

2 stops29h 50m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$812

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sat 28/11

19:55-08:30

2 stops41h 35m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$820

Flights are sorted by cheapest return flights first.

Deals found on 7/10

Showing 1-10 of 22 resultsSorted by cheapest first

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.

SEA-SYD

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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

Prices

The price you pay for your flight from Seattle to Sydney may vary depending on when you book. For the best chance of a lower fare, look to book 23 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 $1,151). Flying from Seattle to Sydney in December is currently the most expensive (average of $2,634). 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 for a return flight from Seattle to Sydney?

Airfare is typical for this route at the moment.

Seattle to Sydney flights typically cost between $1,343 and $1,698 in March.
The cheapest return price found within the last 5 days was $1,424 on Air Canada (18 Mar–22 Mar).

Related info for your journey

How long is the flight from Seattle to Sydney?
Delta and Qantas Airways can get you from Seattle to Sydney in just under 24h 47m. Your travel time can differ by up to 7h 08m. Airlines will cover 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 holiday 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 $1,151). Flying from Seattle to Sydney in December is currently the most expensive (average of $2,634). 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

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Deals for Seattle to Sydney flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Sydney for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Need flexible booking options for your flight to Sydney from Seattle? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Yes, Cheapflights offers price alerts on Seattle to Sydney flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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Cheap flights from Seattle to Sydney from $696

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/4. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Seattle to Sydney

Cheapest flights from Seattle to SydneyExplore the most affordable flight options available from Seattle to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 October 2026.

Explore the most affordable flight options available from Seattle to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 October 2026.

Best flights from Seattle to SydneyDiscover carefully curated flight deals from Seattle to Sydney that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 12 October 2026.

Discover carefully curated flight deals from Seattle to Sydney that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 12 October 2026.

Last-minute flights from Seattle to SydneyDiscover last-minute flight deals from Seattle to Sydney. Data last updated 12 October 2026 and is based on user searches.

Discover last-minute flight deals from Seattle to Sydney. Data last updated 12 October 2026 and is based on user searches.

One-way flights from Seattle to SydneySearch for one-way flight options from Seattle to Sydney. Find affordable one-way fares based on user searches. Data last updated 12 October 2026.

Search for one-way flight options from Seattle to Sydney. Find affordable one-way fares based on user searches. Data last updated 12 October 2026.

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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.

Cheapflights Insights

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

The price you pay for your flight from Seattle to Sydney may vary depending on when you book. For the best chance of a lower fare, look to book 23 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

How much does it cost for a return flight from Seattle to Sydney?

Airfare is typical for this route at the moment.

Seattle to Sydney flights typically cost between $1,343 and $1,698 in March.The cheapest return price found within the last 5 days was $1,424 on Air Canada (18 Mar–22 Mar).

What’s the top stopover airport for flights from Seattle to Sydney?

Vancouver (YVR) – chosen by Cheapflights users on 75% of one-stop itineraries from Seattle to Sydney on Cheapflights.

What’s the cheapest stopover airport for flights from Seattle to Sydney?

Nadi (NAN) is the most affordable one-stop option, with an average return flight price of $1,050.

What’s the fastest stopover option from Seattle to Sydney?

Flights via Nadi (NAN) have the shortest average one-way travel time for one-stop routes: 18h 55m.

Which airport typically offers the quickest stopover for flights from Seattle to Sydney?

Flights via Los Angeles (LAX) offer the fastest connection on this route, with an average stopover time of 2h 13m.

Related info for your journey

How long is the flight from Seattle to Sydney?

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

How can I find direct flights from Seattle to Sydney?

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

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

Travelling to a place near Sydney?

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Complete your trip

Complete your trip to Sydney by adding a car hire and/or hotel booking to your travel itinerary.

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Seattle and Sydney flights

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

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

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

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

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Cheapest flights from Seattle to Sydney
Explore the most affordable flight options available from Seattle to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 October 2026.

Best flights from Seattle to Sydney
Discover carefully curated flight deals from Seattle to Sydney that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 12 October 2026.

Last-minute flights from Seattle to Sydney
Discover last-minute flight deals from Seattle to Sydney. Data last updated 12 October 2026 and is based on user searches.

One-way flights from Seattle to Sydney
Search for one-way flight options from Seattle to Sydney. Find affordable one-way fares based on user searches. Data last updated 12 October 2026.

Seattle to Sydney flights typically cost between $1,343 and $1,698 in March.
The cheapest return price found within the last 5 days was $1,424 on Air Canada (18 Mar–22 Mar).