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 18h 55m and 20h 40m, respectively.

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

Air Canada and Delta 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 March 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.

$553 Cheap Flights from Washington to Sydney in 2026

1 adult

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Washington to Sydney

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

19:59 - 06:50

SEA

SYD

41h 51m

1 stop

09:15 - 20:25

SYD

SEA

28h 10m

1 stop

$1,238Delta

Mon, 13 Apr - Mon, 27 Apr

19:15 - 07:05

SEA

SYD

18h 50m

1 stop

17:50 - 20:59

SYD

SEA

20h 09m

1 stop

$1,248Multiple Airlines

Tue, 28 Jul - Tue, 11 Aug

11:40 - 06:50

SEA

SYD

26h 10m

1 stop

09:15 - 16:53

SYD

SEA

24h 38m

1 stop

$1,251Delta

Sun, 19 Apr - Mon, 11 May

15:40 - 07:20

SEA

SYD

22h 40m

1 stop

09:20 - 09:38

SYD

SEA

17h 18m

1 stop

$1,255Air Canada

Mon, 13 Apr - Tue, 28 Apr

18:40 - 07:05

SEA

SYD

19h 25m

1 stop

17:50 - 19:53

SYD

SEA

19h 03m

1 stop

$1,265Qantas Airways

Sun, 19 Apr - Mon, 11 May

05:40 - 07:20

SEA

SYD

32h 40m

1 stop

09:20 - 19:20

SYD

SEA

27h 00m

1 stop

$1,268Air Canada

Mon, 13 Apr - Wed, 22 Apr

15:00 - 07:05

GEG

SYD

23h 05m

2 stops

12:00 - 20:47

SYD

GEG

25h 47m

1 stop

$1,356American Airlines

Mon, 3 Aug - Mon, 10 Aug

05:05 - 07:00

GEG

SYD

32h 55m

2 stops

09:30 - 15:15

SYD

GEG

22h 45m

2 stops

$1,361United Airlines

Tue, 14 Apr - Tue, 21 Apr

13:20 - 07:05

GEG

SYD

24h 45m

2 stops

12:00 - 20:33

SYD

GEG

25h 33m

1 stop

$1,498American Airlines

Thu, 30 Apr - Thu, 7 May

08:55 - 06:55

GEG

SYD

29h 00m

1 stop

10:20 - 11:16

SYD

GEG

17h 56m

1 stop

$1,530United Airlines

Sat, 2 May - Wed, 6 May

Air Canada flights from State of Washington to Sydney

Our best Air Canada deals on State of Washington to Sydney flight tickets

Air Canada

13 Apr

SEA05:40Seattle/Tacoma Intl

32h 40m

1 stop

SYD07:20Sydney Kingsford Smith

22 Apr

SYD09:20Sydney Kingsford Smith

27h 00m

1 stop

SEA19:20Seattle/Tacoma Intl

$1,268

Air Canada

5 May

SEA14:55Seattle/Tacoma Intl

23h 25m

1 stop

SYD07:20Sydney Kingsford Smith

12 May

SYD07:00Sydney Kingsford Smith

19h 50m

2 stops

SEA09:50Seattle/Tacoma Intl

$1,305

Air Canada

13 Apr

SEA20:00Seattle/Tacoma Intl

22h 40m

2 stops

SYD11:40Sydney Kingsford Smith

22 Apr

SYD09:20Sydney Kingsford Smith

22h 45m

1 stop

SEA15:05Seattle/Tacoma Intl

$1,312

Qantas Airways flights from State of Washington to Sydney

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

Qantas Airways

6 May

SEA17:06Seattle/Tacoma Intl

20h 59m

1 stop

SYD07:05Sydney Kingsford Smith

27 May

SYD09:10Sydney Kingsford Smith

20h 53m

1 stop

SEA13:03Seattle/Tacoma Intl

$1,262

Qantas Airways

19 Apr

SEA18:40Seattle/Tacoma Intl

19h 25m

1 stop

SYD07:05Sydney Kingsford Smith

11 May

SYD17:50Sydney Kingsford Smith

19h 03m

1 stop

SEA19:53Seattle/Tacoma Intl

$1,265

Qantas Airways

3 June

SEA16:28Seattle/Tacoma Intl

21h 37m

1 stop

SYD07:05Sydney Kingsford Smith

24 June

SYD09:10Sydney Kingsford Smith

29h 39m

1 stop

SEA21:49Seattle/Tacoma Intl

$1,288

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 13/4

19:59-06:50

1 stop41h 51m

Sydney Kingsford Smith

Mon 27/4

09:15-20:25

1 stop28h 10m

$1,238

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 28/7

19:15-07:05

1 stop18h 50m

Sydney Kingsford Smith

Tue 11/8

17:50-20:59

1 stop20h 09m

$1,248

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 19/4

11:40-06:50

1 stop26h 10m

Sydney Kingsford Smith

Mon 11/5

09:15-16:53

1 stop24h 38m

$1,251

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 13/4

15:40-07:20

1 stop22h 40m

Sydney Kingsford Smith

Tue 28/4

09:20-09:38

1 stop17h 18m

$1,255

Fastest return journey

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 19/4

18:40-07:05

1 stop19h 25m

Sydney Kingsford Smith

Mon 11/5

17:50-19:53

1 stop19h 03m

$1,265

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 13/4

05:40-07:20

1 stop32h 40m

Sydney Kingsford Smith

Wed 22/4

09:20-19:20

1 stop27h 00m

$1,268

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 3/8

15:00-07:05

2 stops23h 05m

Sydney Kingsford Smith

Mon 10/8

12:00-20:47

1 stop25h 47m

$1,356

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 14/4

05:05-07:00

2 stops32h 55m

Sydney Kingsford Smith

Tue 21/4

09:30-15:15

2 stops22h 45m

$1,361

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 30/4

13:20-07:05

2 stops24h 45m

Sydney Kingsford Smith

Thu 7/5

12:00-20:33

1 stop25h 33m

$1,498

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 2/5

08:55-06:55

1 stop29h 00m

Sydney Kingsford Smith

Wed 6/5

10:20-11:16

1 stop17h 56m

$1,530

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 $1,168. 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 $1,215.

How far in advance should I book a flight 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 $1,519 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 $1,279 on momondo.

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

You could potentially save up to 4% 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	18h 45m
Direct flights	None

The fastest flight from State of Washington to Sydney takes 18h 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

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 March 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 $1,133	Free cancellation	Rating 7.4 9,450 reviews		Search United Airlines flights

Parramatta

Wollongong

Terrigal

Penrith

Katoomba

Lithgow

Manly

Leura

Coogee

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.