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

American Airlines, United Airlines, and Delta 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 17h 50m and 18h 23m, 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 is 1 operator available for flights from Washington to Sydney Kingsford Smith Airport as of May 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.

$648 Cheap Flights from Washington to Sydney in 2026

1 adult

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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.

19:20 - 07:20

SEA

SYD

19h 00m

1 stop

09:20 - 10:05

SYD

SEA

17h 45m

1 stop

$1,398Air Canada

Tue, 2 Jun - Tue, 9 Jun

14:55 - 07:20

SEA

SYD

23h 25m

1 stop

06:00 - 10:05

SYD

SEA

21h 05m

2 stops

$1,425Multiple Airlines

Tue, 26 May - Tue, 2 Jun

05:45 - 07:20

SEA

SYD

32h 35m

1 stop

09:20 - 18:30

SYD

SEA

26h 10m

1 stop

$1,445Air Canada

Wed, 3 Jun - Mon, 15 Jun

10:45 - 19:10

SEA

SYD

39h 25m

2 stops

11:45 - 18:30

SYD

SEA

23h 45m

2 stops

$1,446ANA

Wed, 3 Jun - Mon, 15 Jun

19:20 - 10:55

SEA

SYD

22h 35m

2 stops

09:20 - 18:30

SYD

SEA

26h 10m

1 stop

$1,453Multiple Airlines

Wed, 3 Jun - Mon, 15 Jun

12:51 - 07:05

GEG

SYD

25h 14m

2 stops

12:00 - 20:43

SYD

GEG

25h 43m

1 stop

$1,509American Airlines

Mon, 1 Jun - Sun, 14 Jun

05:41 - 06:55

GEG

SYD

32h 14m

1 stop

12:00 - 12:01

SYD

GEG

41h 01m

1 stop

$1,511American Airlines

Mon, 1 Jun - Sun, 14 Jun

07:00 - 07:05

GEG

SYD

31h 05m

1 stop

10:10 - 13:17

SYD

GEG

21h 07m

1 stop

$1,552Alaska Airlines

Tue, 8 Sep - Thu, 8 Oct

14:51 - 08:00

GEG

SYD

23h 09m

1 stop

19:15 - 20:55

SYD

GEG

44h 40m

2 stops

$1,570Qantas Airways

Thu, 29 Oct - Mon, 2 Nov

14:51 - 08:05

GEG

SYD

23h 14m

1 stop

13:00 - 20:47

SYD

GEG

25h 47m

1 stop

$1,689Qantas Airways

Mon, 12 Oct - Fri, 16 Oct

Alaska Airlines flights from State of Washington to Sydney

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

Alaska Airlines

8 Sept

GEG07:00Spokane

31h 05m

1 stop

SYD07:05Sydney Kingsford Smith

8 Oct

SYD10:10Sydney Kingsford Smith

21h 07m

1 stop

GEG13:17Spokane

$1,552

Alaska Airlines

2 Aug

PDX10:30Portland

39h 20m

1 stop

SYD18:50Sydney Kingsford Smith

21 Aug

SYD20:45Sydney Kingsford Smith

17h 01m

1 stop

PDX20:46Portland

$1,668

Alaska Airlines

16 May

PDX08:00Portland

17h 50m

1 stop

SYD18:50Sydney Kingsford Smith

6 June

SYD20:45Sydney Kingsford Smith

26h 35m

1 stop

PDX06:20Portland

$1,683

ANA flights from State of Washington to Sydney

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

ANA

3 June

SEA10:45Seattle/Tacoma Intl

39h 25m

2 stops

SYD19:10Sydney Kingsford Smith

15 June

SYD11:45Sydney Kingsford Smith

23h 45m

2 stops

SEA18:30Seattle/Tacoma Intl

$1,446

ANA

11 May

SEA16:30Seattle/Tacoma Intl

23h 55m

1 stop

SYD09:25Sydney Kingsford Smith

31 May

SYD20:55Sydney Kingsford Smith

38h 35m

2 stops

SEA18:30Seattle/Tacoma Intl

$1,493

ANA

7 June

SEA16:30Seattle/Tacoma Intl

33h 40m

1 stop

SYD19:10Sydney Kingsford Smith

14 June

SYD20:55Sydney Kingsford Smith

34h 30m

1 stop

SEA14:25Seattle/Tacoma Intl

$1,543

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 2/6

19:20-07:20

1 stop19h 00m

Sydney Kingsford Smith

Tue 9/6

09:20-10:05

1 stop17h 45m

$1,398

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 26/5

14:55-07:20

1 stop23h 25m

Sydney Kingsford Smith

Tue 2/6

06:00-10:05

2 stops21h 05m

$1,425

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 3/6

05:45-07:20

1 stop32h 35m

Sydney Kingsford Smith

Mon 15/6

09:20-18:30

1 stop26h 10m

$1,445

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 3/6

10:45-19:10

2 stops39h 25m

Sydney Kingsford Smith

Mon 15/6

11:45-18:30

2 stops23h 45m

$1,446

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 3/6

19:20-10:55

2 stops22h 35m

Sydney Kingsford Smith

Mon 15/6

09:20-18:30

1 stop26h 10m

$1,453

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 1/6

12:51-07:05

2 stops25h 14m

Sydney Kingsford Smith

Sun 14/6

12:00-20:43

1 stop25h 43m

$1,509

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 1/6

05:41-06:55

1 stop32h 14m

Sydney Kingsford Smith

Sun 14/6

12:00-12:01

1 stop41h 01m

$1,511

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 8/9

07:00-07:05

1 stop31h 05m

Sydney Kingsford Smith

Thu 8/10

10:10-13:17

1 stop21h 07m

$1,552

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 29/10

14:51-08:00

1 stop23h 09m

Sydney Kingsford Smith

Mon 2/11

19:15-20:55

2 stops44h 40m

$1,570

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 12/10

14:51-08:05

1 stop23h 14m

Sydney Kingsford Smith

Fri 16/10

13:00-20:47

1 stop25h 47m

$1,689

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 $196. 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 $776.

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 $1,475 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 $1,243 on momondo.

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

You could potentially save up to 47% 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 30m
Direct flights	None

The fastest flight from State of Washington to Sydney takes 17h 30m

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 is 1 operator available for flights from Washington to Sydney Kingsford Smith Airport as of May 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 $1,103	Free cancellation	Rating 7.4 9,694 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 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.