What is the cheapest airline that flies from Washington to Sydney Kingsford Smith?

Delta, United Airlines, and Alaska Airlines are the most popular carriers operating from Washington to Sydney Kingsford Smith

How long does it take to fly to Sydney?

If you’re flying from a popular airport in State of Washington, such as Seattle or Spokane, and flying into Sydney, then you can expect flight times to average 20h 56m and 24h 50m, respectively.

When did momondo last update prices for flights from Washington to Sydney Kingsford Smith Airport?

Prices for flights from Washington to Sydney Kingsford Smith Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Washington to Sydney Kingsford Smith Airport?

There are 3 operators available for flights from Washington to Sydney Kingsford Smith Airport as of August 2026.

How old do you have to be to fly from Washington to Sydney Kingsford Smith Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Sydney Kingsford Smith Airport.

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

The travel and health documents required for your trip to Sydney Kingsford Smith Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Sydney Kingsford Smith Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$753 Cheap Flights from Washington to Sydney in 2026

Find the cheapest flights from Washington to Sydney

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One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

10:30 - 08:20SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

27h 50m1 stop Vancouver Intl

10:20 - 09:17SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

16h 57m1 stop Vancouver Intl

$1,328Air Canada

Mon, 12 Oct - Tue, 27 Oct

15:15 - 09:35SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

23h 20m1 stop Vancouver Intl

11:20 - 18:22SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

26h 02m1 stop Vancouver Intl

$1,328Air Canada

Wed, 11 Nov - Mon, 30 Nov

15:15 - 09:35SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

23h 20m1 stop Vancouver Intl

11:20 - 18:22SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

26h 02m1 stop Vancouver Intl

$1,328Air Canada

Wed, 11 Nov - Mon, 30 Nov

13:36 - 07:30GEG Spokane-SYD Sydney Kingsford Smith

24h 54m2 stops Seattle/Tacoma Intl Los Angeles Los Angeles

09:10 - 13:23SYD Sydney Kingsford Smith-GEG Spokane

21h 13m1 stop Los Angeles Los Angeles

$1,505Multiple Airlines

Wed, 16 Sep - Wed, 23 Sep

15:37 - 06:25GEG Spokane-SYD Sydney Kingsford Smith

44h 48m2 stops Portland Los Angeles Los Angeles

11:15 - 12:35SYD Sydney Kingsford Smith-GEG Spokane

20h 20m1 stop Los Angeles Los Angeles

$1,507Multiple Airlines

Sat, 24 Oct - Tue, 17 Nov

16:21 - 07:05GEG Spokane-SYD Sydney Kingsford Smith

21h 44m1 stop Los Angeles Los Angeles

09:10 - 13:23SYD Sydney Kingsford Smith-GEG Spokane

21h 13m1 stop Los Angeles Los Angeles

$1,514Multiple Airlines

Wed, 16 Sep - Wed, 23 Sep

07:02 - 06:20GEG Spokane-SYD Sydney Kingsford Smith

28h 18m1 stop San Francisco

11:50 - 11:24SYD Sydney Kingsford Smith-GEG Spokane

18h 34m1 stop San Francisco

$1,543United Airlines

Wed, 2 Dec - Wed, 16 Dec

05:00 - 09:20GEG Spokane-SYD Sydney Kingsford Smith

33h 20m2 stops Denver Intl San Francisco

11:50 - 21:09SYD Sydney Kingsford Smith-GEG Spokane

28h 19m2 stops San Francisco Denver Intl

$1,549United Airlines

Wed, 2 Dec - Wed, 16 Dec

14:30 - 06:25PDX Portland-SYD Sydney Kingsford Smith

20h 55m1 stop San Francisco

11:05 - 13:26SYD Sydney Kingsford Smith-PDX Portland

21h 21m2 stops Brisbane Los Angeles Los Angeles

$1,624Qantas Airways

Fri, 29 Jan - Mon, 8 Feb

14:53 - 06:25PDX Portland-SYD Sydney Kingsford Smith

21h 32m1 stop San Francisco

21:50 - 13:50SYD Sydney Kingsford Smith-PDX Portland

35h 00m2 stops Brisbane Los Angeles Los Angeles

$1,790Qantas Airways

Wed, 28 Oct - Sun, 1 Nov

Cheap last-minute flights

Enter your travel dates to find the best prices.

16:30 - 19:10SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

33h 40m1 stop Tokyo Haneda

11:45 - 18:32SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

23h 47m2 stops Tokyo Haneda Vancouver Intl

$1,456ANA

Tue, 11 Aug - Tue, 18 Aug

16:30 - 19:10SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

33h 40m1 stop Tokyo Haneda

20:55 - 14:25SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

34h 30m1 stop Tokyo Haneda

$1,463ANA

Tue, 11 Aug - Tue, 18 Aug

10:40 - 19:10SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

39h 30m2 stops Vancouver Intl Tokyo Haneda

11:45 - 18:32SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

23h 47m2 stops Tokyo Haneda Vancouver Intl

$1,476ANA

Tue, 11 Aug - Tue, 18 Aug

05:50 - 07:20SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

32h 30m1 stop Vancouver Intl

13:00 - 22:42SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

50h 42m2 stops Brisbane Vancouver Intl

$1,485Air Canada

Wed, 12 Aug - Sat, 29 Aug

17:02 - 07:05SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

21h 03m1 stop Los Angeles Los Angeles

17:50 - 23:29SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

22h 39m1 stop Los Angeles Los Angeles

$1,525Qantas Airways

Wed, 12 Aug - Sat, 29 Aug

09:05 - 06:55SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

28h 50m1 stop San Francisco

09:30 - 21:31SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

29h 01m2 stops Los Angeles Los Angeles Denver Intl

$1,543United Airlines

Wed, 12 Aug - Sat, 29 Aug

12:44 - 07:00SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

25h 16m2 stops Denver Intl Los Angeles Los Angeles

10:20 - 17:42SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

24h 22m2 stops San Francisco Denver Intl

$1,549United Airlines

Wed, 12 Aug - Sat, 29 Aug

14:34 - 07:00SEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

23h 26m2 stops Denver Intl Los Angeles Los Angeles

09:30 - 17:42SYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

25h 12m2 stops Los Angeles Los Angeles Denver Intl

$1,549United Airlines

Wed, 12 Aug - Sat, 29 Aug

15:16 - 07:05GEG Spokane-SYD Sydney Kingsford Smith

22h 49m2 stops Portland Los Angeles Los Angeles

09:10 - 22:38SYD Sydney Kingsford Smith-GEG Spokane

30h 28m1 stop Los Angeles Los Angeles

$1,575Multiple Airlines

Sat, 15 Aug - Sat, 22 Aug

06:20 - 07:05GEG Spokane-SYD Sydney Kingsford Smith

31h 45m1 stop Los Angeles Los Angeles

09:10 - 22:38SYD Sydney Kingsford Smith-GEG Spokane

30h 28m1 stop Los Angeles Los Angeles

$1,586Multiple Airlines

Sat, 15 Aug - Sat, 22 Aug

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ANA flights from State of Washington to Sydney

Our best ANA deals on State of Washington to Sydney flight tickets

ANA

24 Aug

SEA16:30Seattle/Tacoma Intl

23h 55m

1 stop

SYD09:25Sydney Kingsford Smith

30 Aug

SYD20:55Sydney Kingsford Smith

43h 31m

2 stops

SEA23:26Seattle/Tacoma Intl

$1,371

ANA

24 Aug

SEA16:30Seattle/Tacoma Intl

33h 40m

1 stop

SYD19:10Sydney Kingsford Smith

30 Aug

SYD20:55Sydney Kingsford Smith

34h 30m

1 stop

SEA14:25Seattle/Tacoma Intl

$1,451

ANA

11 Aug

SEA16:30Seattle/Tacoma Intl

33h 40m

1 stop

SYD19:10Sydney Kingsford Smith

18 Aug

SYD11:45Sydney Kingsford Smith

23h 47m

2 stops

SEA18:32Seattle/Tacoma Intl

$1,456

United Airlines flights from State of Washington to Sydney

Our best United Airlines deals on State of Washington to Sydney flight tickets

United Airlines

16 Aug

SEA12:15Seattle/Tacoma Intl

25h 45m

1 stop

SYD07:00Sydney Kingsford Smith

6 Sept

SYD09:30Sydney Kingsford Smith

19h 04m

1 stop

SEA11:34Seattle/Tacoma Intl

$1,473

United Airlines

16 Aug

SEA05:00Seattle/Tacoma Intl

33h 00m

2 stops

SYD07:00Sydney Kingsford Smith

6 Sept

SYD09:30Sydney Kingsford Smith

30h 34m

2 stops

SEA23:04Seattle/Tacoma Intl

$1,478

United Airlines

2 Dec

GEG07:02Spokane

28h 18m

1 stop

SYD06:20Sydney Kingsford Smith

16 Dec

SYD11:50Sydney Kingsford Smith

18h 34m

1 stop

GEG11:24Spokane

$1,543

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Mon 12/10

10:30-08:20

1 stop27h 50m

Sydney Kingsford Smith

Tue 27/10

10:20-09:17

1 stop16h 57m

$1,328

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 11/11

15:15-09:35

1 stop23h 20m

Sydney Kingsford Smith

Mon 30/11

11:20-18:22

1 stop26h 02m

$1,328

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 11/11

15:15-09:35

1 stop23h 20m

Sydney Kingsford Smith

Mon 30/11

11:20-18:22

1 stop26h 02m

$1,328

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 16/9

13:36-07:30

2 stops24h 54m

Sydney Kingsford Smith

Wed 23/9

09:10-13:23

1 stop21h 13m

$1,505

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Sat 24/10

15:37-06:25

2 stops44h 48m

Sydney Kingsford Smith

Tue 17/11

11:15-12:35

1 stop20h 20m

$1,507

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 16/9

16:21-07:05

1 stop21h 44m

Sydney Kingsford Smith

Wed 23/9

09:10-13:23

1 stop21h 13m

$1,514

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 2/12

07:02-06:20

1 stop28h 18m

Sydney Kingsford Smith

Wed 16/12

11:50-11:24

1 stop18h 34m

$1,543

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 2/12

05:00-09:20

2 stops33h 20m

Sydney Kingsford Smith

Wed 16/12

11:50-21:09

2 stops28h 19m

$1,549

Fastest return journey

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Fri 29/1

14:30-06:25

1 stop20h 55m

Sydney Kingsford Smith

Mon 8/2

11:05-13:26

2 stops21h 21m

$1,624

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Wed 28/10

14:53-06:25

1 stop21h 32m

Sydney Kingsford Smith

Sun 1/11

21:50-13:50

2 stops35h 00m

$1,790

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 State of Washington 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

Other information

What is the cheapest month to fly to Sydney?

The month of August is, on average, the cheapest month to fly to Sydney from State of Washington, with most prices found around $1,127. 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 $1,192.

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

You are more likely to see cheaper flights to Sydney from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $1,570 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 State of Washington for as low as $1,313 on momondo.

Cheap State of Washington to Sydney flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Sydney

Fastest flight time	17h 45m
Direct flights	None

The fastest flight from State of Washington to Sydney takes 17h 45m

There are no direct flights from State of Washington to Sydney. There are no popular flight routes from State of Washington to Sydney.

Search flight deals

Frequently asked questions about flying from Washington to Sydney

When did momondo last update prices for flights from Washington to Sydney Kingsford Smith Airport?
Prices for flights from Washington to Sydney Kingsford Smith Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Washington to Sydney Kingsford Smith Airport?
There are 3 operators available for flights from Washington to Sydney Kingsford Smith Airport as of August 2026.
How old do you have to be to fly from Washington to Sydney Kingsford Smith Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Sydney Kingsford Smith Airport.
What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?
The travel and health documents required for your trip to Sydney Kingsford Smith Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Sydney Kingsford Smith Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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Why use momondo?

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

It is quick and easy to find Washington to Sydney flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Sydney that suits you.

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

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

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington to Sydney.

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

Yes momondo offers price alerts on flights to Sydney from Washington. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.