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

San Francisco (SFO) is the most affordable one-stop option, with an average return flight price of $1,529. Find deals

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

Flights via San Francisco (SFO) offer the fastest connection on this route, with an average stopover time of 1h 56m. Find deals

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

Flights via San Francisco (SFO) have the shortest average one-way travel time for one-stop routes: 18h 25m. Find deals

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

Vancouver (YVR) – chosen by Cheapflights users on 33% of one-stop itineraries from Seattle to Sydney on Cheapflights. Find deals

How long is the flight from Seattle to Sydney?

Hawaiian Airlines can get you from Seattle to Sydney in just under 18h 45m. Your travel time can differ by up to . Airlines will cover a distance of 12463 km.

What are the cheapest airlines flying from Seattle to Sydney round-trip?

Flying on United Airlines is currently your cheapest option to Sydney, with prices starting at $1,228. Another option worth looking into is Air Canada, starting at $1,292 round trip. Users have found that United Airlines is 28% cheaper than the other options available to this destination.

What is the cheapest day to fly from Seattle to Sydney?

Travellers seeking maximum savings on their Seattle to Sydney flight should consider departing on Wednesday mornings when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 day to fly return from Seattle to Sydney?

Users have found that flying from Seattle to Sydney on a Friday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

What is the cheapest month to fly from Seattle to Sydney?

Flights from Seattle to Sydney lean towards being more expensive in December. Prices are generally better when you fly from Seattle to Sydney in February, with the cheapest ticket starting at $1,165.

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.

$563+ Flights from Seattle to Sydney

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Sydney Kingsford Smith are usually found in February or March, booked 2 days in advance, depart on a Monday or Wednesday and return on a Thursday

Cheap flight deals from Seattle to Sydney

Round-trip from	$1,154
One-way from	$563
Popular in	December
Cheapest in	February
Average price	$1,665

Philippine Airlines
19/10-26/10
2 total stops
65h 25m total
Seattle to Sydney

Search Deals

Air Canada
15/11
1 total stop
18h 35m total
Seattle to Sydney

Search Deals

Highest demand for flights based on searches. 12% potential increase in price ($385 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($70 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2025

Search Deals

Find flight deals from Seattle to Sydney

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 19 August 2025.

Sun 19/1023:35SEA - SYD

1 stop39h 25mPhilippine Airlines

Sun 26/1011:35SYD - SEA

1 stop26h 00mPhilippine Airlines

Deal found 18/8$1,154

Thu 28/814:55SEA - SYD

1 stop23h 25mAir Canada

Wed 10/909:20SYD - SEA

1 stop21h 56mAir Canada

Deal found 19/8$1,156

Sun 2/1121:30SEA - SYD

1 stop41h 20mPhilippine Airlines

Sun 16/1111:35SYD - SEA

1 stop26h 00mPhilippine Airlines

Deal found 18/8$1,171

Sat 8/1110:05SEA - SYD

1 stop28h 30mAir Canada

Sat 15/1111:20SYD - SEA

1 stop22h 06mAir Canada

Deal found 17/8$1,197

Sun 31/806:25SEA - SYD

1 stop31h 35mUnited Airlines

Sun 14/910:20SYD - SEA

1 stop18h 47mUnited Airlines

Deal found 17/8$1,217

Thu 4/915:23SEA - SYD

1 stop22h 42mMultiple Airlines

Wed 17/917:45SYD - SEA

1 stop19h 39mMultiple Airlines

Deal found 16/8$1,220

Sun 19/1014:55SEA - SYD

2 stops26h 45mAir Canada

Sun 26/1010:20SYD - SEA

1 stop22h 06mAir Canada

Deal found 17/8$1,227

Wed 29/1020:00SEA - SYD

2 stops30h 40mAir Canada

Sat 15/1111:20SYD - SEA

1 stop17h 11mAir Canada

Deal found 17/8$1,228

Mon 20/1014:42SEA - SYD

1 stop23h 23mQantas Airways

Tue 4/1111:15SYD - SEA

1 stop20h 47mQantas Airways

Deal found 17/8$1,234

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 19 August 2025.

Sat 1/1117:30SEA - SYD

1 stop19h 55mMultiple Airlines

Fri 14/1111:15SYD - SEA

1 stop20h 47mMultiple Airlines

Deal found 17/8$1,270

Sat 1/1107:00SEA - SYD

1 stop18h 45mHawaiian Airlines

Fri 21/1121:40SYD - SEA

1 stop26h 35mHawaiian Airlines

Deal found 18/8$1,271

Fri 12/1212:00SEA - SYD

1 stop25h 30mDelta

Mon 29/1210:40SYD - SEA

2 stops20h 56mDelta

Deal found 18/8$1,280

Sat 1/1117:30SEA - SYD

1 stop19h 55mMultiple Airlines

Sat 22/1117:45SYD - SEA

1 stop19h 18mMultiple Airlines

Deal found 16/8$1,271

Mon 15/1212:00SEA - SYD

1 stop25h 30mDelta

Mon 29/1210:40SYD - SEA

2 stops20h 56mDelta

Deal found 18/8$1,280

Thu 18/917:59SEA - SYD

1 stop20h 31mMultiple Airlines

Fri 26/917:45SYD - SEA

1 stop21h 13mMultiple Airlines

Deal found 17/8$1,271

Sat 13/1209:30SEA - SYD

1 stop28h 00mDelta

Mon 29/1210:40SYD - SEA

2 stops20h 56mDelta

Deal found 18/8$1,280

Mon 6/1016:30SEA - SYD

1 stop21h 00mMultiple Airlines

Mon 13/1018:45SYD - SEA

1 stop22h 16mMultiple Airlines

Deal found 17/8$1,271

Sun 14/1211:25SEA - SYD

2 stops26h 05mDelta

Mon 29/1210:40SYD - SEA

2 stops20h 56mDelta

Deal found 18/8$1,280

Wed 10/1213:30SEA - SYD

2 stops24h 00mDelta

Mon 29/1210:40SYD - SEA

2 stops20h 56mDelta

Deal found 19/8$1,282

Last-minute flights from Seattle to Sydney
Discover last-minute flight deals from Seattle to Sydney. Data last updated 19 August 2025 and is based on user searches.

Sun 24/814:32SEA - SYD

1 stop23h 33mQantas Airways

Fri 12/917:45SYD - SEA

1 stop21h 13mQantas Airways

Deal found 17/8$1,236

Wed 27/817:59SEA - SYD

1 stop20h 31mMultiple Airlines

Tue 16/909:10SYD - SEA

1 stop20h 44mMultiple Airlines

Deal found 17/8$1,270

Wed 27/808:15SEA - SYD

1 stop18h 30mHawaiian Airlines

Tue 16/921:40SYD - SEA

1 stop25h 35mHawaiian Airlines

Deal found 19/8$1,271

Thu 28/814:55SEA - SYD

1 stop23h 25mAir Canada

Wed 10/909:20SYD - SEA

1 stop21h 56mAir Canada

Deal found 19/8$1,156

Thu 28/815:43SEA - SYD

1 stop22h 12mAmerican Airlines

Wed 10/909:10SYD - SEA

2 stops26h 59mAmerican Airlines

Deal found 19/8$1,256

Thu 28/817:14SEA - SYD

1 stop20h 46mUnited Airlines

Wed 10/910:20SYD - SEA

2 stops24h 31mUnited Airlines

Deal found 17/8$1,257

Thu 28/805:30SEA - SYD

1 stop32h 50mMultiple Airlines

Wed 10/916:20SYD - SEA

2 stops21h 22mMultiple Airlines

Deal found 19/8$1,267

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 19 August 2025.

Sat 15/1120:00SEA - SYD

1 stop18h 35mAir Canada

Deal found 17/8$563

Thu 28/819:15SEA - SYD

1 stop19h 05mAir Canada

Deal found 17/8$564

Fri 17/1014:42SEA - SYD

1 stop23h 23mQantas Airways

Deal found 19/8$575

Sat 18/1007:40SEA - SYD

1 stop29h 50mQantas Airways

Deal found 17/8$576

Mon 1/1220:00SEA - SYD

1 stop39h 55mAir Canada

Deal found 19/8$579

Tue 4/1116:30SEA - SYD

1 stop21h 30mQantas Airways

Deal found 17/8$584

Fri 24/1014:42SEA - SYD

1 stop22h 48mQantas Airways

Deal found 19/8$586

Wed 1/1016:59SEA - SYD

1 stop21h 06mQantas Airways

Deal found 18/8$595

Thu 2/1015:40SEA - SYD

1 stop22h 15mAmerican Airlines

Deal found 18/8$598

Sat 18/1010:00SEA - SYD

2 stops34h 40mMultiple Airlines

Deal found 19/8$599

Fly from

Fly to

Route

Depart

Return

Price

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 1/11

17:30-07:25

1 stop19h 55m

Sydney Kingsford Smith

Fri 14/11

11:15-13:02

1 stop20h 47m

$1,270

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 1/11

07:00-19:45

1 stop18h 45m

Sydney Kingsford Smith

Fri 21/11

21:40-05:15

1 stop26h 35m

$1,271

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 1/11

17:30-07:25

1 stop19h 55m

Sydney Kingsford Smith

Sat 22/11

17:45-18:03

1 stop19h 18m

$1,271

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 18/9

17:59-07:30

1 stop20h 31m

Sydney Kingsford Smith

Fri 26/9

17:45-21:58

1 stop21h 13m

$1,271

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 6/10

16:30-07:30

1 stop21h 00m

Sydney Kingsford Smith

Mon 13/10

18:45-23:01

1 stop22h 16m

$1,271

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Fri 12/12

12:00-08:30

1 stop25h 30m

Sydney Kingsford Smith

Mon 29/12

10:40-12:36

2 stops20h 56m

$1,280

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 15/12

12:00-08:30

1 stop25h 30m

Sydney Kingsford Smith

Mon 29/12

10:40-12:36

2 stops20h 56m

$1,280

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 13/12

09:30-08:30

1 stop28h 00m

Sydney Kingsford Smith

Mon 29/12

10:40-12:36

2 stops20h 56m

$1,280

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 14/12

11:25-08:30

2 stops26h 05m

Sydney Kingsford Smith

Mon 29/12

10:40-12:36

2 stops20h 56m

$1,280

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 10/12

13:30-08:30

2 stops24h 00m

Sydney Kingsford Smith

Mon 29/12

10:40-12:36

2 stops20h 56m

$1,282

Flights are sorted by cheapest return flights first.

Deals found on 18/8

Showing 1-10 of 20 results

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 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.

Cheapflights Insights

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

Prices

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 2 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, May is the cheapest month in which you can book a flight from Seattle to Sydney (average of $129). Flying from Seattle to Sydney in October is currently the most expensive (average of $171). 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.

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

A simple way to save on the total cost of your ticket is to fly from Seattle to Sydney at midday. If you’re flexible enough to do this you can expect to save up to 19% on your trip compared to booking a flight in the morning.

Reviews of airlines servicing Sydney

Get a feel of what it's like to fly with United Airlines and Air Canada from Seattle to Sydney by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,922 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

United Airlines

7.4

Good

8,922 reviews

United Airlines

7.4

Good

8,922 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Air Canada

7.1

Good

9,997 reviews

United Airlines

7.4

Good

8,922 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

How long is the flight from Seattle to Sydney?
Hawaiian Airlines can get you from Seattle to Sydney in just under 18h 45m. Your travel time can differ by up to . Airlines will cover a distance of 12463 km.
What are the cheapest airlines flying from Seattle to Sydney round-trip?
Flying on United Airlines is currently your cheapest option to Sydney, with prices starting at $1,228. Another option worth looking into is Air Canada, starting at $1,292 round trip. Users have found that United Airlines is 28% cheaper than the other options available to this destination.
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, May is the cheapest month in which you can book a flight from Seattle to Sydney (average of $129). Flying from Seattle to Sydney in October is currently the most expensive (average of $171). 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

Parramatta

Wollongong

Katoomba

Penrith

Coogee

Terrigal

Manly

Cronulla

Lithgow

Randwick

Bondi Beach

Leura

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Alternative routes for Seattle to Sydney

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Portland to Coolangatta flights

Direct flights to New South Wales

Other flights to Sydney

Top 2 airlines flying from Seattle to Sydney

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$1,228	Average$1,754	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Air Canada	Cheapest$1,292	Average$1,629	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

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

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 $563

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 13/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Sydney Kingsford Smith are usually found in February or March, booked 2 days in advance, depart on a Monday or Wednesday and return on a Thursday

Cheap flight deals from Seattle to Sydney

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find 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 19 August 2025.

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 19 August 2025.

Cheapflights Fare Finder

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

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

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

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

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

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

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

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

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

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

Reviews of airlines servicing Sydney

Get a feel of what it's like to fly with United Airlines and Air Canada from Seattle to Sydney by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How long is the flight from Seattle to Sydney?

What are the cheapest airlines flying from Seattle to Sydney round-trip?

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?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Sydney

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from Seattle to Sydney

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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 19 August 2025.