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 2 as of January 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.

$647 Cheap Flights from Seattle to Sydney in 2026

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Find the cheapest flights from Seattle to Sydney

Round-trip

One-way

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Cheap return flights

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16:32 - 19:15

SEA

SYD

33h 43m

2 stops

20:55 - 21:06

SYD

SEA

41h 11m

2 stops

$1,503ANA

Tue, 5 May - Tue, 19 May

09:18 - 07:25

SEA

SYD

27h 07m

1 stop

14:00 - 17:09

SYD

SEA

22h 09m

2 stops

$1,508Multiple Airlines

Fri, 20 Feb - Fri, 6 Mar

16:30 - 19:15

SEA

SYD

33h 45m

1 stop

11:50 - 14:18

SYD

SEA

43h 28m

2 stops

$1,510ANA

Sat, 2 May - Fri, 22 May

16:30 - 19:15

SEA

SYD

33h 45m

1 stop

20:55 - 14:25

SYD

SEA

34h 30m

1 stop

$1,513ANA

Sat, 2 May - Thu, 14 May

17:06 - 07:30

SEA

SYD

21h 24m

1 stop

13:15 - 09:10

SYD

SEA

36h 55m

2 stops

$1,514Multiple Airlines

Mon, 4 May - Fri, 15 May

09:55 - 19:15

SEA

SYD

40h 20m

2 stops

20:55 - 20:48

SYD

SEA

40h 53m

2 stops

$1,516ANA

Tue, 19 May - Mon, 1 Jun

10:51 - 07:25

SEA

SYD

25h 34m

1 stop

14:00 - 17:15

SYD

SEA

22h 15m

2 stops

$1,517Multiple Airlines

Thu, 5 Feb - Tue, 10 Feb

23:10 - 08:00

SEA

SYD

39h 50m

1 stop

10:15 - 20:05

SYD

SEA

26h 50m

1 stop

$1,520Philippine Airlines

Thu, 30 Apr - Tue, 12 May

10:42 - 07:30

SEA

SYD

27h 48m

1 stop

13:10 - 23:05

SYD

SEA

26h 55m

2 stops

$1,521Multiple Airlines

Sat, 2 May - Wed, 13 May

20:08 - 07:30

SEA

SYD

42h 22m

1 stop

13:10 - 22:18

SYD

SEA

26h 08m

2 stops

$1,523Multiple Airlines

Tue, 7 Apr - Wed, 22 Apr

ANA flights from Seattle to Sydney

Our best ANA deals on Seattle to Sydney flight tickets

ANA

5 May

SEA16:32Seattle/Tacoma Intl

33h 43m

2 stops

SYD19:15Sydney Kingsford Smith

19 May

SYD20:55Sydney Kingsford Smith

41h 11m

2 stops

SEA21:06Seattle/Tacoma Intl

$1,503

ANA

2 May

SEA16:30Seattle/Tacoma Intl

33h 45m

1 stop

SYD19:15Sydney Kingsford Smith

22 May

SYD11:50Sydney Kingsford Smith

43h 28m

2 stops

SEA14:18Seattle/Tacoma Intl

$1,510

ANA

21 May

SEA16:30Seattle/Tacoma Intl

33h 45m

1 stop

SYD19:15Sydney Kingsford Smith

2 June

SYD11:50Sydney Kingsford Smith

23h 40m

2 stops

SEA18:30Seattle/Tacoma Intl

$1,513

Qantas Airways flights from Seattle to Sydney

Our best Qantas Airways deals on Seattle to Sydney flight tickets

Qantas Airways

30 Apr

SEA19:06Seattle/Tacoma Intl

48h 09m

2 stops

SYD12:15Sydney Kingsford Smith

19 May

SYD21:25Sydney Kingsford Smith

18h 40m

1 stop

SEA23:05Seattle/Tacoma Intl

$1,581

Qantas Airways

19 Feb

SEA06:32Seattle/Tacoma Intl

31h 28m

1 stop

SYD09:00Sydney Kingsford Smith

24 Feb

SYD19:15Sydney Kingsford Smith

42h 43m

2 stops

SEA18:58Seattle/Tacoma Intl

$1,607

Qantas Airways

7 Feb

SEA06:00Seattle/Tacoma Intl

32h 00m

1 stop

SYD09:00Sydney Kingsford Smith

24 Feb

SYD19:15Sydney Kingsford Smith

42h 43m

2 stops

SEA18:58Seattle/Tacoma Intl

$1,621

Fly from

Fly to

Route

Depart

Return

Price

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 5/5

16:32-19:15

2 stops33h 43m

Sydney Kingsford Smith

Tue 19/5

20:55-21:06

2 stops41h 11m

$1,503

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Fri 20/2

09:18-07:25

1 stop27h 07m

Sydney Kingsford Smith

Fri 6/3

14:00-17:09

2 stops22h 09m

$1,508

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 2/5

16:30-19:15

1 stop33h 45m

Sydney Kingsford Smith

Fri 22/5

11:50-14:18

2 stops43h 28m

$1,510

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 2/5

16:30-19:15

1 stop33h 45m

Sydney Kingsford Smith

Thu 14/5

20:55-14:25

1 stop34h 30m

$1,513

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 4/5

17:06-07:30

1 stop21h 24m

Sydney Kingsford Smith

Fri 15/5

13:15-09:10

2 stops36h 55m

$1,514

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 19/5

09:55-19:15

2 stops40h 20m

Sydney Kingsford Smith

Mon 1/6

20:55-20:48

2 stops40h 53m

$1,516

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 5/2

10:51-07:25

1 stop25h 34m

Sydney Kingsford Smith

Tue 10/2

14:00-17:15

2 stops22h 15m

$1,517

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 30/4

23:10-08:00

1 stop39h 50m

Sydney Kingsford Smith

Tue 12/5

10:15-20:05

1 stop26h 50m

$1,520

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 2/5

10:42-07:30

1 stop27h 48m

Sydney Kingsford Smith

Wed 13/5

13:10-23:05

2 stops26h 55m

$1,521

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 7/4

20:08-07:30

1 stop42h 22m

Sydney Kingsford Smith

Wed 22/4

13:10-22:18

2 stops26h 08m

$1,523

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

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 $1,222. If you aren’t able to travel to Sydney during the month of August, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $1,243.

How far in advance should I book a flight 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 $1,524 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 $1,266 on momondo.

Can stopping save me money on Seattle to Sydney flights?

You could potentially save up to 38% 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 January 2026, prices for Seattle to Sydney flights are approximately 33% 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

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 2 as of January 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 (52% of total bookings). The next most popular airline is Air Canada (48%).

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 $1,154	Free cancellation	Rating 7.4 9,205 reviews		Search United Airlines flights
Air Canada	PriceFrom $1,216	Free cancellation	Rating 7.1 10,660 reviews		Search Air Canada flights

Parramatta

Wollongong

Terrigal

Penrith

Katoomba

Lithgow

Leura

Manly

Coogee

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.