Which layover airport has the shortest connection time from Seattle to Sydney?

Vancouver (YVR) has the shortest average layover time for this route: 2h 19m.

Which layover airport has the shortest travel time from Seattle to Sydney?

Flights connecting via Vancouver (YVR) have the shortest average one-way travel time: 18h 39m.

What airlines fly to Sydney?

Air Canada, ANA and Delta are the top three most popular airlines that fly to Sydney from Seattle according to our data. Air Canada is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Sydney. Keep in mind that there are 8 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

Which airport is the most popular layover for flights between Seattle and Sydney?

Los Angeles (LAX) was the most common stop: 60% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Seattle to Sydney?

Flights via Manila (MNL) offer the lowest average round-trip price of $773.

What is the cheapest airline that flies from Seattle/Tacoma Intl to Sydney Kingsford Smith?

Alaska Airlines is the most popular carrier operating from Seattle/Tacoma Intl to Sydney Kingsford Smith

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Sydney Kingsford Smith Airport?

Prices for flights from Seattle/Tacoma Intl Airport to Sydney Kingsford Smith Airport are updated daily.

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Sydney Kingsford Smith Airport?

The number of operators available for flights from Seattle/Tacoma Intl Airport to Sydney Kingsford Smith Airport is 8 as of October 2026.

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Sydney Kingsford Smith Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Sydney Kingsford Smith Airport.

What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

The required travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Sydney Kingsford Smith Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$486 Cheap Flights from Seattle to Sydney in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Sydney

Round-trip

One-way

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Cheap round-trip flights

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7:00 am - 7:45 pmSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

17h 45m1 stop Honolulu

9:40 pm - 6:08 amSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

27h 28m1 stop Honolulu

$966Multiple Airlines

Mon, Nov 9 - Tue, Nov 17

7:00 am - 7:45 pmSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

17h 45m1 stop Honolulu

9:40 pm - 9:19 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

18h 39m1 stop Honolulu

$977Multiple Airlines

Wed, Feb 3 - Tue, Mar 2

3:15 pm - 9:35 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

23h 20m1 stop Vancouver Intl

11:20 am - 2:37 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

22h 17m1 stop Vancouver Intl

$1,002Air Canada

Mon, Feb 15 - Mon, Feb 22

8:40 am - 9:35 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

29h 55m1 stop Vancouver Intl

11:20 am - 6:22 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

26h 02m1 stop Vancouver Intl

$1,002Air Canada

Sun, Nov 15 - Sun, Nov 22

7:00 pm - 9:35 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

19h 35m1 stop Vancouver Intl

11:20 am - 6:20 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

25h 00m1 stop Vancouver Intl

$1,057Air New Zealand

Wed, Mar 3 - Mon, Mar 15

7:00 pm - 9:35 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

19h 35m1 stop Vancouver Intl

11:20 am - 6:20 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

25h 00m1 stop Vancouver Intl

$1,057Air New Zealand

Mon, Mar 1 - Mon, Mar 15

3:55 pm - 6:25 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

19h 30m1 stop Los Angeles

11:15 am - 12:02 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

19h 47m1 stop Los Angeles

$1,091Alaska Airlines

Thu, Dec 3 - Thu, Dec 10

11:05 am - 6:25 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

24h 20m1 stop Los Angeles

11:15 am - 12:02 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

19h 47m1 stop Los Angeles

$1,091Alaska Airlines

Fri, Dec 4 - Thu, Dec 10

10:12 am - 8:30 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

27h 18m1 stop Los Angeles

10:40 am - 4:51 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

25h 11m1 stop Los Angeles

$1,097Delta

Wed, Nov 11 - Mon, Nov 30

11:30 am - 8:30 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

26h 00m2 stops Salt Lake City Los Angeles

10:40 am - 4:51 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

25h 11m1 stop Los Angeles

$1,102Delta

Wed, Nov 11 - Mon, Nov 30

Cheap last minute flights

Enter your travel dates to find the best prices.

10:30 pm - 9:50 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

41h 20m1 stop Manila Ninoy Aquino Intl

11:30 am - 7:45 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

26h 15m1 stop Manila Ninoy Aquino Intl

$992Philippine Airlines

Sun, Oct 25 - Sun, Nov 1

7:05 pm - 8:35 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

19h 30m1 stop Vancouver Intl

11:20 am - 2:37 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

22h 17m1 stop Vancouver Intl

$1,005Air Canada

Sun, Oct 25 - Sun, Nov 8

3:15 pm - 8:35 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

23h 20m1 stop Vancouver Intl

6:20 am - 9:32 amSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

22h 12m2 stops Brisbane Vancouver Intl

$1,015Multiple Airlines

Sun, Oct 25 - Sun, Nov 8

7:00 am - 6:50 pmSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

17h 50m1 stop Honolulu

9:40 pm - 10:52 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

19h 12m1 stop Honolulu

$1,076Multiple Airlines

Fri, Oct 23 - Fri, Oct 30

7:15 pm - 8:35 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

19h 20m1 stop Vancouver Intl

10:20 am - 2:37 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

22h 17m1 stop Vancouver Intl

$1,077Air Canada

Sat, Oct 24 - Sat, Oct 31

5:30 am - 7:50 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

32h 20m2 stops Salt Lake City Los Angeles

9:40 am - 2:50 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

23h 10m2 stops Los Angeles Salt Lake City

$1,302Delta

Fri, Oct 23 - Fri, Oct 30

4:37 pm - 9:00 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

22h 23m1 stop Los Angeles

11:10 am - 1:00 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

20h 50m1 stop Los Angeles

$5,277Qantas Airways

Sun, Oct 25 - Mon, Nov 9

4:37 pm - 12:25 pmSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

25h 48m2 stops Los Angeles Melbourne

11:10 am - 1:00 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

20h 50m1 stop Los Angeles

$5,429Qantas Airways

Sun, Oct 25 - Mon, Nov 9

10:10 am - 10:30 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

30h 20m2 stops Vancouver Intl Tokyo Haneda

9:45 pm - 6:22 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

39h 37m2 stops Tokyo Haneda Vancouver Intl

$8,296ANA

Sun, Oct 25 - Mon, Nov 9

8:35 pm - 8:15 pmSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

29h 40m2 stops San Francisco Tokyo Haneda

12:25 pm - 6:22 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

24h 57m2 stops Tokyo Haneda Vancouver Intl

$9,517ANA

Sun, Oct 25 - Mon, Nov 9

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Philippine Airlines flights from Seattle to Sydney

Our best Philippine Airlines deals on Seattle to Sydney flight tickets

Philippine Airlines

Oct 25

SEA10:30 pmSeattle/Tacoma Intl

41h 20m

1 stop

SYD9:50 amSydney Kingsford Smith

Nov 1

SYD11:30 amSydney Kingsford Smith

26h 15m

1 stop

SEA7:45 pmSeattle/Tacoma Intl

$992

Philippine Airlines

Mar 1

SEA9:30 pmSeattle/Tacoma Intl

41h 20m

1 stop

SYD9:50 amSydney Kingsford Smith

Mar 17

SYD11:30 amSydney Kingsford Smith

26h 15m

1 stop

SEA7:45 pmSeattle/Tacoma Intl

$1,001

Philippine Airlines

Feb 28

SEA9:30 pmSeattle/Tacoma Intl

41h 20m

1 stop

SYD9:50 amSydney Kingsford Smith

Mar 17

SYD11:30 amSydney Kingsford Smith

26h 15m

1 stop

SEA7:45 pmSeattle/Tacoma Intl

$1,033

Air Canada flights from Seattle to Sydney

Our best Air Canada deals on Seattle to Sydney flight tickets

Air Canada

Nov 15

SEA8:40 amSeattle/Tacoma Intl

29h 55m

1 stop

SYD9:35 amSydney Kingsford Smith

Nov 22

SYD11:20 amSydney Kingsford Smith

26h 02m

1 stop

SEA6:22 pmSeattle/Tacoma Intl

$1,002

Air Canada

Mar 1

SEA10:10 amSeattle/Tacoma Intl

28h 25m

1 stop

SYD9:35 amSydney Kingsford Smith

Mar 17

SYD10:20 amSydney Kingsford Smith

16h 55m

1 stop

SEA9:15 amSeattle/Tacoma Intl

$1,003

Air Canada

Feb 9

SEA7:05 pmSeattle/Tacoma Intl

19h 30m

1 stop

SYD9:35 amSydney Kingsford Smith

Feb 23

SYD11:20 amSydney Kingsford Smith

26h 02m

1 stop

SEA6:22 pmSeattle/Tacoma Intl

$1,005

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Mon 11/9

7:00 am-7:45 pm

1 stop17h 45m

Sydney Kingsford Smith

Tue 11/17

9:40 pm-6:08 am

1 stop27h 28m

$966

Quickest round-trip

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 2/3

7:00 am-7:45 pm

1 stop17h 45m

Sydney Kingsford Smith

Tue 3/2

9:40 pm-9:19 pm

1 stop18h 39m

$977

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Mon 2/15

3:15 pm-9:35 am

1 stop23h 20m

Sydney Kingsford Smith

Mon 2/22

11:20 am-2:37 pm

1 stop22h 17m

$1,002

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sun 11/15

8:40 am-9:35 am

1 stop29h 55m

Sydney Kingsford Smith

Sun 11/22

11:20 am-6:22 pm

1 stop26h 02m

$1,002

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 3/3

7:00 pm-9:35 am

1 stop19h 35m

Sydney Kingsford Smith

Mon 3/15

11:20 am-6:20 pm

1 stop25h 00m

$1,057

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Mon 3/1

7:00 pm-9:35 am

1 stop19h 35m

Sydney Kingsford Smith

Mon 3/15

11:20 am-6:20 pm

1 stop25h 00m

$1,057

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Thu 12/3

3:55 pm-6:25 am

1 stop19h 30m

Sydney Kingsford Smith

Thu 12/10

11:15 am-12:02 pm

1 stop19h 47m

$1,091

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Fri 12/4

11:05 am-6:25 am

1 stop24h 20m

Sydney Kingsford Smith

Thu 12/10

11:15 am-12:02 pm

1 stop19h 47m

$1,091

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 11/11

10:12 am-8:30 am

1 stop27h 18m

Sydney Kingsford Smith

Mon 11/30

10:40 am-4:51 pm

1 stop25h 11m

$1,097

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 11/11

11:30 am-8:30 am

2 stops26h 00m

Sydney Kingsford Smith

Mon 11/30

10:40 am-4:51 pm

1 stop25h 11m

$1,102

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Seattle to Sydney

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

What is the typical price of a round-trip flight between Seattle and Sydney?

Prices are currently typical for flights on this route.

Typical prices usually range from $938 to $1,183.
The lowest price recently found on this route was $966.

What is the cheapest month to fly to Sydney?

In general, August is the cheapest month to fly from Seattle to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $804. If you are unable to visit Sydney during the month of August, then departing from Seattle during the month September is also very affordable. Most momondo users find prices during this month for around $1,044.

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

You are more likely to see cheaper flights to Sydney from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $1,172 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Seattle for as low as $983 on momondo.

How have Seattle to Sydney flight prices changed over time?

As of October 2026, prices for Seattle to Sydney flights are approximately 51% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Sydney

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Sydney according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Seattle to Sydney (SEA to SYD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Sydney

Best Price Found	$486
Fastest flight time	18h 00m
Direct flights	None

The best one-way flight to Sydney from Seattle in the past 72 hours is $486. The best round-trip flight deal from Seattle to Sydney found on momondo in the last 72 hours is $966.

The fastest flight from Seattle to Sydney takes 18h 00m

There are no direct flights from Seattle to Sydney. There are no popular flight routes from Seattle to Sydney.

Search flight deals

Frequently asked questions about flying from Seattle to Sydney

How far is Seattle/Tacoma Intl to Sydney Kingsford Smith by plane?
Sydney Kingsford Smith is 7743.7 mi away from Seattle/Tacoma Intl. In terms of flight time, this usually takes a little over 18h 00m.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Sydney Kingsford Smith Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Sydney Kingsford Smith Airport are updated daily.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Sydney Kingsford Smith Airport?
The number of operators available for flights from Seattle/Tacoma Intl Airport to Sydney Kingsford Smith Airport is 8 as of October 2026.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Sydney Kingsford Smith Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Sydney Kingsford Smith Airport.
What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?
The required travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Sydney Kingsford Smith Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Seattle to Sydney?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Seattle to Sydney is Air Canada (29% of total bookings). The next most popular airlines are ANA (17%), Delta (13%), and United Airlines (13%).

Best airlines flying from Seattle to Sydney

Compare and see reviews for airlines that fly from Seattle to Sydney with momondo

Airline	Rating	Free Cancellation	Price
ANA	PriceFrom $583	Free Cancellation	Rating 8.3 1,327 reviews	Search ANA flights
Qantas Airways	PriceFrom $819	Free Cancellation	Rating 7.5 1,114 reviews	Search Qantas Airways flights
Delta	PriceFrom $835	Free Cancellation	Rating 7.8 8,649 reviews	Search Delta flights
United Airlines	PriceFrom $888	Free Cancellation	Rating 7.3 10,390 reviews	Search United Airlines flights
Air Canada	PriceFrom $938	Free Cancellation	Rating 7.1 11,784 reviews	Search Air Canada flights
Air New Zealand	PriceFrom $947	Free Cancellation	Rating 8.0 675 reviews	Search Air New Zealand flights
American Airlines	PriceFrom $975	Free Cancellation	Rating 7.0 12,181 reviews	Search American Airlines flights
Alaska Airlines	PriceFrom $1,159	Free Cancellation	Rating 7.9 13,091 reviews	Search Alaska Airlines flights

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Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Sydney?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seattle to Sydney. momondo saves you time and could save you money on your trip.

Can I find flights from Seattle to Sydney with flexible booking policies on momondo?

Yes. All flights to Sydney from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Seattle to Sydney?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Sydney from Seattle.

I’m not ready to book a flight from Seattle to Sydney right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Seattle to Sydney flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Cheap flights from Seattle to Sydney from $486

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Sydney departing on 3/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Philippine Airlines flights from Seattle to Sydney

Our best Philippine Airlines deals on Seattle to Sydney flight tickets

Air Canada flights from Seattle to Sydney

Our best Air Canada deals on Seattle to Sydney flight tickets

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How to get the cheapest flight ticket from Seattle to Sydney

What is the typical price of a round-trip flight between Seattle and Sydney?

What is the cheapest month to fly to Sydney?

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

How have Seattle to Sydney flight prices changed over time?

What is the cheapest airline that flies from Seattle/Tacoma Intl to Sydney Kingsford Smith?

What airlines fly to Sydney?

Which airport is the most popular layover for flights between Seattle and Sydney?

Which layover airport offers the lowest fares from Seattle to Sydney?

Which layover airport has the shortest travel time from Seattle to Sydney?

Which layover airport has the shortest connection time from Seattle to Sydney?

When to book flights from Seattle to Sydney

Cheap Seattle to Sydney (SEA to SYD) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Seattle to Sydney

Best airlines flying from Seattle to Sydney

Compare and see reviews for airlines that fly from Seattle to Sydney with momondo

Traveling to a place near Sydney?

Why use momondo?

An easier way to manage your Sydney trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Australia

Airports servicing New South Wales

Fly your favorite airline to Sydney

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Sydney

List of cabin classes available on flights landing in Sydney. Availability may vary depending on flight origin and airline.

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Popular flights according to clicks in the last 7 days on momondo

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According to popular flight searches on momondo this year

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