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

San Francisco (SFO) has the shortest average layover time for this route: 2h 34m.

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

Flights via Dallas (DFW) offer the lowest average round-trip price of $804.

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: 20h 12m.

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

Los Angeles (LAX) was the most common stop: 51% of momondo users choosing 1-stop flights on this route connected there.

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

United Airlines and Delta are the most popular carriers operating from Seattle/Tacoma Intl to Sydney Kingsford Smith

What airlines fly to Sydney?

Air Canada, United Airlines and Alaska Airlines 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 31% of people opting to fly with this airline when traveling to Sydney. Keep in mind that there are 9 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

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 9 as of May 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.

$533 Cheap Flights from Seattle to Sydney in 2026

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

Prices are currently low for flights on this route. Typical prices usually range from $1,175 to $975. The lowest price recently found on this route was $1,036.

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Find the cheapest flights from Seattle to Sydney

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One-way

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7:20 pm - 7:20 am

SEA

SYD

19h 00m

1 stop

9:20 am - 10:40 pm

SYD

SEA

30h 20m

1 stop

$1,036Air Canada

Sun, Jun 7 - Sun, Jun 14

7:05 pm - 9:35 am

SEA

SYD

19h 30m

1 stop

11:20 am - 9:57 pm

SYD

SEA

29h 37m

1 stop

$1,043Air Canada

Wed, Nov 11 - Mon, Nov 30

10:45 am - 7:20 am

SEA

SYD

27h 35m

1 stop

9:20 am - 10:07 am

SYD

SEA

17h 47m

1 stop

$1,045Air Canada

Mon, Aug 10 - Wed, Aug 26

3:00 pm - 7:20 am

SEA

SYD

23h 20m

1 stop

9:20 am - 6:32 pm

SYD

SEA

26h 12m

1 stop

$1,047Air Canada

Sun, Jun 14 - Sun, Jun 21

7:20 pm - 7:20 am

SEA

SYD

19h 00m

1 stop

9:20 am - 2:22 pm

SYD

SEA

22h 02m

1 stop

$1,057Air Canada

Sun, Aug 2 - Tue, Aug 25

3:00 pm - 7:20 am

SEA

SYD

23h 20m

1 stop

9:20 am - 10:07 am

SYD

SEA

17h 47m

1 stop

$1,060Air Canada

Tue, Jun 30 - Tue, Jul 7

5:45 am - 7:20 am

SEA

SYD

32h 35m

1 stop

9:20 am - 6:32 pm

SYD

SEA

26h 12m

1 stop

$1,063Multiple Airlines

Sun, Jun 14 - Sun, Jun 21

10:45 am - 7:20 am

SEA

SYD

27h 35m

1 stop

9:20 am - 10:07 am

SYD

SEA

17h 47m

1 stop

$1,064Multiple Airlines

Mon, Aug 3 - Tue, Aug 25

3:00 pm - 7:20 am

SEA

SYD

23h 20m

1 stop

6:00 am - 10:07 am

SYD

SEA

21h 07m

2 stops

$1,066Multiple Airlines

Tue, Jul 28 - Tue, Aug 11

7:20 pm - 7:20 am

SEA

SYD

19h 00m

1 stop

6:00 am - 10:07 am

SYD

SEA

21h 07m

2 stops

$1,067Multiple Airlines

Tue, Jul 28 - Tue, Aug 11

Air Canada flights from Seattle to Sydney

Our best Air Canada deals on Seattle to Sydney flight tickets

Air Canada

May 24

SEA7:20 pmSeattle/Tacoma Intl

19h 00m

1 stop

SYD7:20 amSydney Kingsford Smith

Jun 7

SYD9:20 amSydney Kingsford Smith

30h 20m

1 stop

SEA10:40 pmSeattle/Tacoma Intl

$986

Air Canada

May 24

SEA7:20 pmSeattle/Tacoma Intl

19h 00m

1 stop

SYD7:20 amSydney Kingsford Smith

Jun 7

SYD9:20 amSydney Kingsford Smith

30h 20m

1 stop

SEA10:40 pmSeattle/Tacoma Intl

$994

Air Canada

May 24

SEA7:20 pmSeattle/Tacoma Intl

19h 00m

1 stop

SYD7:20 amSydney Kingsford Smith

Jun 7

SYD7:00 amSydney Kingsford Smith

24h 20m

2 stops

SEA2:20 pmSeattle/Tacoma Intl

$1,000

American Airlines flights from Seattle to Sydney

Our best American Airlines deals on Seattle to Sydney flight tickets

American Airlines

May 24

SEA2:40 pmSeattle/Tacoma Intl

23h 25m

1 stop

SYD7:05 amSydney Kingsford Smith

Jun 7

SYD5:50 pmSydney Kingsford Smith

20h 59m

1 stop

SEA9:49 pmSeattle/Tacoma Intl

$1,233

American Airlines

May 26

SEA3:20 pmSeattle/Tacoma Intl

22h 45m

2 stops

SYD7:05 amSydney Kingsford Smith

Jun 13

SYD12:00 pmSydney Kingsford Smith

25h 03m

1 stop

SEA8:03 pmSeattle/Tacoma Intl

$1,303

American Airlines

May 26

SEA3:20 pmSeattle/Tacoma Intl

22h 45m

2 stops

SYD7:05 amSydney Kingsford Smith

Jun 13

SYD12:00 pmSydney Kingsford Smith

25h 03m

1 stop

SEA8:03 pmSeattle/Tacoma Intl

$1,304

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 6/7

7:20 pm-7:20 am

1 stop19h 00m

Sydney Kingsford Smith

Sun 6/14

9:20 am-10:40 pm

1 stop30h 20m

$1,036

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 11/11

7:05 pm-9:35 am

1 stop19h 30m

Sydney Kingsford Smith

Mon 11/30

11:20 am-9:57 pm

1 stop29h 37m

$1,043

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 8/10

10:45 am-7:20 am

1 stop27h 35m

Sydney Kingsford Smith

Wed 8/26

9:20 am-10:07 am

1 stop17h 47m

$1,045

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 6/14

3:00 pm-7:20 am

1 stop23h 20m

Sydney Kingsford Smith

Sun 6/21

9:20 am-6:32 pm

1 stop26h 12m

$1,047

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 8/2

7:20 pm-7:20 am

1 stop19h 00m

Sydney Kingsford Smith

Tue 8/25

9:20 am-2:22 pm

1 stop22h 02m

$1,057

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 6/30

3:00 pm-7:20 am

1 stop23h 20m

Sydney Kingsford Smith

Tue 7/7

9:20 am-10:07 am

1 stop17h 47m

$1,060

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 6/14

5:45 am-7:20 am

1 stop32h 35m

Sydney Kingsford Smith

Sun 6/21

9:20 am-6:32 pm

1 stop26h 12m

$1,063

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 8/3

10:45 am-7:20 am

1 stop27h 35m

Sydney Kingsford Smith

Tue 8/25

9:20 am-10:07 am

1 stop17h 47m

$1,064

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 7/28

3:00 pm-7:20 am

1 stop23h 20m

Sydney Kingsford Smith

Tue 8/11

6:00 am-10:07 am

2 stops21h 07m

$1,066

Quickest round-trip

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 7/28

7:20 pm-7:20 am

1 stop19h 00m

Sydney Kingsford Smith

Tue 8/11

6:00 am-10:07 am

2 stops21h 07m

$1,067

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?

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 $792. If you are unable to visit Sydney during the month of August, then departing from Seattle during the month February is also very affordable. Most momondo users find prices during this month for around $844.

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 $1,046 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 $900 on momondo.

How have Seattle to Sydney flight prices changed over time?

As of May 2026, prices for Seattle to Sydney flights are approximately 12% 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

Fastest flight time	19h 00m
Direct flights	None

The fastest flight from Seattle to Sydney takes 19h 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 19h 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 9 as of May 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 (21% of total bookings). The next most popular airlines are United Airlines (17%), Alaska Airlines (15%), and Qantas Airways (14%).

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 1,211 reviews	Search ANA flights
Alaska Airlines	PriceFrom $591	Free Cancellation	Rating 7.9 12,378 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $778	Free Cancellation	Rating 7.1 11,062 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $789	Free Cancellation	Rating 7.5 1,037 reviews	Search Qantas Airways flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.1 11,646 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $813	Free Cancellation	Rating 7.8 2,837 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $831	Free Cancellation	Rating 7.4 9,735 reviews	Search United Airlines flights
Delta	PriceFrom $842	Free Cancellation	Rating 7.9 8,452 reviews	Search Delta flights
Alaska Airlines	PriceFrom $1,158	Free Cancellation	Rating 0.0	Search Alaska Airlines flights

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Swansea

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 $533

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 6/9. 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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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

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

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.

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

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