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

Flights connecting via Vancouver (YVR) have the shortest average one-way travel time: 19h 00m.

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

Flights via Vancouver (YVR) offer the lowest average return price of $1,438.

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

Honolulu (HNL) was the most common stop: 67% of momondo users choosing one-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

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

Vancouver (YVR) has the shortest average stopover time for this route: 2h 08m.

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 refresh 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 1 as of June 2026.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. 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 licence 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.

$687 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 $1,725 to $1,276. The lowest price recently found on this route was $1,417.

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Sydney

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

23:55 - 09:45

SEA

SYD

38h 50m

1 stop

11:35 - 19:35

SYD

SEA

27h 00m

1 stop

$1,417Philippine Airlines

Thu, 26 Nov - Wed, 9 Dec

19:05 - 09:35

SEA

SYD

19h 30m

1 stop

11:20 - 09:17

SYD

SEA

16h 57m

1 stop

$1,468Air Canada

Wed, 4 Nov - Mon, 30 Nov

10:45 - 07:20

SEA

SYD

27h 35m

1 stop

09:20 - 18:32

SYD

SEA

26h 12m

1 stop

$1,485Air Canada

Tue, 28 Jul - Tue, 11 Aug

10:45 - 07:20

SEA

SYD

27h 35m

1 stop

09:20 - 14:22

SYD

SEA

22h 02m

1 stop

$1,488Air Canada

Tue, 28 Jul - Tue, 11 Aug

10:45 - 07:20

SEA

SYD

27h 35m

1 stop

09:20 - 10:07

SYD

SEA

17h 47m

1 stop

$1,491Air Canada

Sun, 21 Jun - Tue, 7 Jul

15:00 - 07:20

SEA

SYD

23h 20m

1 stop

09:20 - 22:42

SYD

SEA

30h 22m

1 stop

$1,504Air Canada

Sun, 9 Aug - Sun, 30 Aug

10:30 - 08:20

SEA

SYD

27h 50m

1 stop

10:20 - 14:22

SYD

SEA

22h 02m

1 stop

$1,507Air Canada

Wed, 7 Oct - Tue, 20 Oct

10:10 - 09:35

SEA

SYD

28h 25m

1 stop

11:20 - 21:57

SYD

SEA

29h 37m

1 stop

$1,508Air New Zealand

Wed, 11 Nov - Mon, 30 Nov

15:00 - 07:20

SEA

SYD

23h 20m

1 stop

07:30 - 10:07

SYD

SEA

19h 37m

2 stops

$1,511Air Canada

Sun, 21 Jun - Tue, 7 Jul

15:00 - 07:20

SEA

SYD

23h 20m

1 stop

06:00 - 10:07

SYD

SEA

21h 07m

2 stops

$1,514Multiple Airlines

Tue, 28 Jul - Tue, 11 Aug

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Air Canada flights from Seattle to Sydney

Our best Air Canada deals on Seattle to Sydney flight tickets

Air Canada

4 Nov

SEA19:05Seattle/Tacoma Intl

19h 30m

1 stop

SYD09:35Sydney Kingsford Smith

30 Nov

SYD11:20Sydney Kingsford Smith

16h 57m

1 stop

SEA09:17Seattle/Tacoma Intl

$1,468

Air Canada

27 July

SEA19:20Seattle/Tacoma Intl

19h 00m

1 stop

SYD07:20Sydney Kingsford Smith

9 Aug

SYD09:20Sydney Kingsford Smith

22h 02m

1 stop

SEA14:22Seattle/Tacoma Intl

$1,484

Air Canada

28 July

SEA10:45Seattle/Tacoma Intl

27h 35m

1 stop

SYD07:20Sydney Kingsford Smith

11 Aug

SYD09:20Sydney Kingsford Smith

26h 12m

1 stop

SEA18:32Seattle/Tacoma Intl

$1,485

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 26/11

23:55-09:45

1 stop38h 50m

Sydney Kingsford Smith

Wed 9/12

11:35-19:35

1 stop27h 00m

$1,417

Fastest return journey

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 4/11

19:05-09:35

1 stop19h 30m

Sydney Kingsford Smith

Mon 30/11

11:20-09:17

1 stop16h 57m

$1,468

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 28/7

10:45-07:20

1 stop27h 35m

Sydney Kingsford Smith

Tue 11/8

09:20-18:32

1 stop26h 12m

$1,485

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 28/7

10:45-07:20

1 stop27h 35m

Sydney Kingsford Smith

Tue 11/8

09:20-14:22

1 stop22h 02m

$1,488

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 21/6

10:45-07:20

1 stop27h 35m

Sydney Kingsford Smith

Tue 7/7

09:20-10:07

1 stop17h 47m

$1,491

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 9/8

15:00-07:20

1 stop23h 20m

Sydney Kingsford Smith

Sun 30/8

09:20-22:42

1 stop30h 22m

$1,504

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 7/10

10:30-08:20

1 stop27h 50m

Sydney Kingsford Smith

Tue 20/10

10:20-14:22

1 stop22h 02m

$1,507

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 11/11

10:10-09:35

1 stop28h 25m

Sydney Kingsford Smith

Mon 30/11

11:20-21:57

1 stop29h 37m

$1,508

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 21/6

15:00-07:20

1 stop23h 20m

Sydney Kingsford Smith

Tue 7/7

07:30-10:07

2 stops19h 37m

$1,511

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 28/7

15:00-07:20

1 stop23h 20m

Sydney Kingsford Smith

Tue 11/8

06:00-10:07

2 stops21h 07m

$1,514

Flights are sorted by cheapest return 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

Stopovers

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

What is the cheapest month to fly to Sydney?

The month of August is, on average, the cheapest month to fly to Sydney from Seattle, with most prices found around $1,113. If you aren’t able to travel to Sydney during the month of August, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $1,200.

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 $1,502 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Seattle for as low as $1,316 on momondo.

Can stopping save me money on Seattle to Sydney flights?

You could potentially save up to 47% on your flight if you consider stops on a Seattle to Sydney flight.

How have Seattle to Sydney flight prices changed over time?

As of June 2026, prices for Seattle to Sydney flights are approximately 31% 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 return 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	17h 45m
Direct flights	None

The fastest flight from Seattle to Sydney takes 17h 45m

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?
Seattle/Tacoma Intl and Sydney Kingsford Smith are 12462.2 km apart from one another. In terms of flight time, this usually takes a little over 17h 45m.
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 refresh 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 1 as of June 2026.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Sydney Kingsford Smith Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. 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 licence 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 United Airlines (100% of total bookings).

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
United Airlines	PriceFrom $1,139	Free cancellation	Rating 7.4 9,805 reviews		Search United Airlines flights

Parramatta

Wollongong

Terrigal

Penrith

Katoomba

Lithgow

Manly

Coogee

Leura

Bondi Beach

Cronulla

Randwick

Charlestown

Newport

Swansea

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Sydney for you.

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

Yes. momondo allows you to filter the results for Seattle to Sydney flights to just show those with flexible booking policies.

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

Once you have performed a search for Seattle to Sydney flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Of course. momondo tracks the price of Seattle to Sydney flights. All you need is a valid email address and we will do the rest; it is that quick and easy.