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 17h 50m and 18h 38m, respectively.

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

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

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 is 1 operator available for flights from Washington to Sydney Kingsford Smith Airport as of June 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.

$621 Cheap Flights from Washington to Sydney in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Washington to Sydney

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

20:25 - 06:50

SEA

SYD

41h 25m

1 stop

09:15 - 23:59

SYD

SEA

31h 44m

2 stops

$1,418Delta

Mon, 29 Jun - Sun, 12 Jul

09:59 - 06:50

SEA

SYD

27h 51m

1 stop

09:15 - 20:30

SYD

SEA

28h 15m

1 stop

$1,431Delta

Mon, 10 Aug - Mon, 17 Aug

10:05 - 06:50

SEA

SYD

27h 45m

1 stop

09:15 - 16:37

SYD

SEA

24h 22m

1 stop

$1,433Delta

Sun, 2 Aug - Tue, 11 Aug

12:36 - 06:50

SEA

SYD

25h 14m

1 stop

09:15 - 20:30

SYD

SEA

28h 15m

1 stop

$1,434Delta

Mon, 3 Aug - Mon, 10 Aug

19:20 - 07:20

SEA

SYD

19h 00m

1 stop

09:20 - 22:42

SYD

SEA

30h 22m

1 stop

$1,457Air Canada

Sun, 5 Jul - Sun, 19 Jul

08:00 - 18:50

PDX

SYD

17h 50m

1 stop

20:45 - 20:46

SYD

PDX

17h 01m

1 stop

$1,541Alaska Airlines

Mon, 31 Aug - Sun, 13 Sep

07:05 - 06:25

GEG

SYD

28h 20m

2 stops

11:15 - 22:25

SYD

GEG

30h 10m

1 stop

$1,553Multiple Airlines

Sun, 1 Nov - Sat, 21 Nov

12:57 - 06:25

GEG

SYD

22h 28m

1 stop

11:15 - 22:25

SYD

GEG

30h 10m

1 stop

$1,564Multiple Airlines

Sun, 1 Nov - Sat, 21 Nov

08:00 - 18:50

PDX

SYD

17h 50m

1 stop

20:45 - 20:46

SYD

PDX

17h 01m

1 stop

$1,579Alaska Airlines

Mon, 31 Aug - Sun, 13 Sep

07:00 - 07:30

PDX

SYD

31h 30m

1 stop

09:10 - 23:59

SYD

PDX

31h 49m

1 stop

$1,630Qantas Airways

Wed, 5 Aug - Wed, 12 Aug

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United Airlines flights from State of Washington to Sydney

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

United Airlines

23 Sept

SEA13:16Seattle/Tacoma Intl

24h 39m

1 stop

SYD06:55Sydney Kingsford Smith

7 Oct

SYD10:30Sydney Kingsford Smith

28h 45m

2 stops

SEA21:15Seattle/Tacoma Intl

$1,475

United Airlines

22 Nov

SEA07:03Seattle/Tacoma Intl

28h 57m

1 stop

SYD07:00Sydney Kingsford Smith

12 Dec

SYD11:20Sydney Kingsford Smith

19h 13m

1 stop

SEA11:33Seattle/Tacoma Intl

$1,506

United Airlines

25 Nov

SEA17:28Seattle/Tacoma Intl

20h 52m

1 stop

SYD09:20Sydney Kingsford Smith

9 Dec

SYD11:20Sydney Kingsford Smith

19h 13m

1 stop

SEA11:33Seattle/Tacoma Intl

$1,508

Qantas Airways flights from State of Washington to Sydney

Our best Qantas Airways deals on State of Washington to Sydney flight tickets

Qantas Airways

26 Sept

SEA17:59Seattle/Tacoma Intl

20h 06m

1 stop

SYD07:05Sydney Kingsford Smith

11 Oct

SYD18:50Sydney Kingsford Smith

20h 36m

1 stop

SEA21:26Seattle/Tacoma Intl

$1,521

Qantas Airways

29 Aug

SEA17:32Seattle/Tacoma Intl

20h 58m

1 stop

SYD07:30Sydney Kingsford Smith

5 Sept

SYD17:50Sydney Kingsford Smith

18h 49m

1 stop

SEA19:39Seattle/Tacoma Intl

$1,543

Qantas Airways

1 Sept

SEA17:10Seattle/Tacoma Intl

21h 20m

1 stop

SYD07:30Sydney Kingsford Smith

30 Sept

SYD17:50Sydney Kingsford Smith

22h 09m

1 stop

SEA22:59Seattle/Tacoma Intl

$1,544

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 29/6

20:25-06:50

1 stop41h 25m

Sydney Kingsford Smith

Sun 12/7

09:15-23:59

2 stops31h 44m

$1,418

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 10/8

09:59-06:50

1 stop27h 51m

Sydney Kingsford Smith

Mon 17/8

09:15-20:30

1 stop28h 15m

$1,431

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 2/8

10:05-06:50

1 stop27h 45m

Sydney Kingsford Smith

Tue 11/8

09:15-16:37

1 stop24h 22m

$1,433

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 3/8

12:36-06:50

1 stop25h 14m

Sydney Kingsford Smith

Mon 10/8

09:15-20:30

1 stop28h 15m

$1,434

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 5/7

19:20-07:20

1 stop19h 00m

Sydney Kingsford Smith

Sun 19/7

09:20-22:42

1 stop30h 22m

$1,457

Fastest return journey

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 31/8

08:00-18:50

1 stop17h 50m

Sydney Kingsford Smith

Sun 13/9

20:45-20:46

1 stop17h 01m

$1,541

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 1/11

07:05-06:25

2 stops28h 20m

Sydney Kingsford Smith

Sat 21/11

11:15-22:25

1 stop30h 10m

$1,553

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 1/11

12:57-06:25

1 stop22h 28m

Sydney Kingsford Smith

Sat 21/11

11:15-22:25

1 stop30h 10m

$1,564

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 31/8

08:00-18:50

1 stop17h 50m

Sydney Kingsford Smith

Sun 13/9

20:45-20:46

1 stop17h 01m

$1,579

PortlandSydney

PDX - SYD

PDXSYD

Portland

Wed 5/8

07:00-07:30

1 stop31h 30m

Sydney Kingsford Smith

Wed 12/8

09:10-23:59

1 stop31h 49m

$1,630

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 February is, on average, the cheapest month to fly to Sydney from State of Washington, with most prices found around $206. If you aren’t able to travel to Sydney during the month of February, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $358.

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 $1,546 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 $1,353 on momondo.

Can stopping save me money on State of Washington to Sydney flights?

You could potentially save up to 37% on your flight if you consider stops on a State of Washington to Sydney flight.

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.

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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 is 1 operator available for flights from Washington to Sydney Kingsford Smith Airport as of June 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.

Best airlines flying from State of Washington to Sydney

Compare and see reviews for airlines that fly from State of Washington to Sydney with momondo

Airline	Rating	Free cancellation	Price
United Airlines	PriceFrom $1,157	Free cancellation	Rating 7.4 9,893 reviews		Search United Airlines flights

Parramatta

Wollongong

Terrigal

Penrith

Katoomba

Manly

Coogee

Leura

Lithgow

Bondi Beach

Cronulla

Randwick

Charlestown

Newport

Swansea

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.