How long does it take to fly to Sydney?

Flight times from State of Washington to Sydney vary, but if you’re flying out of Seattle and flying into Sydney (one of the most popular routes), then the duration is 18h 21m on average. Another popular route from State of Washington to Sydney is flying from Spokane to Sydney, which will take roughly 19h 39m. Keep in mind that layovers or delays could extend your travel time.

What airlines fly to Sydney?

Air Canada, United Airlines and Delta are the top three most popular airlines that fly to Sydney from State of Washington according to our data. Air Canada is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Sydney. Keep in mind that there are 8 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

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

Air Canada, Qantas Airways, and United Airlines 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 updated daily.

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

As of August 2025, there are 8 operators available to choose from for flights from Washington to Sydney Kingsford Smith Airport.

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 layovers 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 license, 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.

$366 Cheap Flights from Washington to Sydney in 2025

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Round-trip

One-way

Last minute

Cheap round-trip flights

10:00 am - 8:20 amSEA-SYD

28h 20m1 stop

10:20 am - 9:31 amSYD-SEA

17h 11m1 stop

$709Air Canada

Find Deal

Sun, Oct 19 - Mon, Oct 27

7:15 pm - 8:20 amSEA-SYD

19h 05m1 stop

10:20 am - 9:31 amSYD-SEA

17h 11m1 stop

$710Air Canada

Find Deal

Sun, Oct 19 - Mon, Oct 27

8:00 pm - 1:00 pmSEA-SYD

22h 00m2 stops

11:20 am - 7:16 pmSYD-SEA

26h 56m1 stop

$746

Find Deal

Sun, Nov 2 - Sun, Nov 16

8:00 pm - 9:35 amSEA-SYD

18h 35m1 stop

6:25 am - 9:21 amSYD-SEA

19h 56m2 stops

$751

Find Deal

Tue, Feb 3 - Tue, Jul 7

2:42 pm - 8:05 amSEA-SYD

23h 23m1 stop

5:45 pm - 6:03 pmSYD-SEA

19h 18m1 stop

$820Qantas Airways

Find Deal

Mon, Oct 20 - Tue, Nov 4

1:10 pm - 8:05 amSEA-SYD

24h 55m1 stop

5:45 pm - 6:03 pmSYD-SEA

19h 18m1 stop

$821Qantas Airways

Find Deal

Wed, Oct 15 - Sat, Nov 8

2:55 pm - 9:00 amSEA-SYD

23h 05m2 stops

11:15 am - 2:08 pmSYD-SEA

21h 53m2 stops

$830American Airlines

Find Deal

Mon, Nov 3 - Mon, Nov 24

2:42 pm - 7:30 amSEA-SYD

22h 48m1 stop

11:15 am - 2:08 pmSYD-SEA

21h 53m2 stops

$831American Airlines

Find Deal

Mon, Oct 20 - Tue, Nov 4

1:38 pm - 7:00 amGEG-SYD

24h 22m2 stops

9:30 am - 9:03 pmSYD-GEG

28h 33m2 stops

$881United Airlines

Find Deal

Sat, Aug 30 - Sat, Sep 6

4:05 pm - 7:00 amGEG-SYD

67h 55m2 stops

12:10 pm - 10:42 amSYD-GEG

17h 32m1 stop

$913United Airlines

Find Deal

Tue, Nov 4 - Mon, Nov 17

Air Canada flights from State of Washington to Sydney

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

Air Canada

Oct 19

SEA10:00 amSeattle/Tacoma Intl

28h 20m

1 stop

SYD8:20 amSydney Kingsford Smith

Oct 27

SYD10:20 amSydney Kingsford Smith

17h 11m

1 stop

SEA9:31 amSeattle/Tacoma Intl

$709

Find similar

Air Canada

Oct 19

SEA7:15 pmSeattle/Tacoma Intl

19h 05m

1 stop

SYD8:20 amSydney Kingsford Smith

Oct 27

SYD10:20 amSydney Kingsford Smith

17h 11m

1 stop

SEA9:31 amSeattle/Tacoma Intl

$710

Find similar

Air Canada

Aug 30

SEA5:30 amSeattle/Tacoma Intl

32h 50m

1 stop

SYD7:20 amSydney Kingsford Smith

Sep 14

SYD9:20 amSydney Kingsford Smith

17h 02m

1 stop

SEA9:22 amSeattle/Tacoma Intl

$718

Find similar

United Airlines flights from State of Washington to Sydney

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

United Airlines

Aug 20

SEA2:29 pmSeattle/Tacoma Intl

23h 26m

1 stop

SYD6:55 amSydney Kingsford Smith

Aug 24

SYD9:30 amSydney Kingsford Smith

21h 00m

1 stop

SEA1:30 pmSeattle/Tacoma Intl

$851

Find similar

United Airlines

Aug 9

SEA7:34 pmSeattle/Tacoma Intl

18h 21m

1 stop

SYD6:55 amSydney Kingsford Smith

Aug 11

SYD9:30 amSydney Kingsford Smith

21h 16m

1 stop

SEA1:46 pmSeattle/Tacoma Intl

$860

Find similar

United Airlines

Aug 9

SEA5:14 pmSeattle/Tacoma Intl

20h 46m

1 stop

SYD7:00 amSydney Kingsford Smith

Aug 11

SYD9:30 amSydney Kingsford Smith

29h 03m

2 stops

SEA9:33 pmSeattle/Tacoma Intl

$865

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 10/19

10:00 am-8:20 am

1 stop28h 20m

Sydney Kingsford Smith

Mon 10/27

10:20 am-9:31 am

1 stop17h 11m

$709

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 10/19

7:15 pm-8:20 am

1 stop19h 05m

Sydney Kingsford Smith

Mon 10/27

10:20 am-9:31 am

1 stop17h 11m

$710

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 11/2

8:00 pm-1:00 pm

2 stops22h 00m

Sydney Kingsford Smith

Sun 11/16

11:20 am-7:16 pm

1 stop26h 56m

$746

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 2/3

8:00 pm-9:35 am

1 stop18h 35m

Sydney Kingsford Smith

Tue 7/7

6:25 am-9:21 am

2 stops19h 56m

$751

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 10/20

2:42 pm-8:05 am

1 stop23h 23m

Sydney Kingsford Smith

Tue 11/4

5:45 pm-6:03 pm

1 stop19h 18m

$820

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 10/15

1:10 pm-8:05 am

1 stop24h 55m

Sydney Kingsford Smith

Sat 11/8

5:45 pm-6:03 pm

1 stop19h 18m

$821

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 11/3

2:55 pm-9:00 am

2 stops23h 05m

Sydney Kingsford Smith

Mon 11/24

11:15 am-2:08 pm

2 stops21h 53m

$830

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 10/20

2:42 pm-7:30 am

1 stop22h 48m

Sydney Kingsford Smith

Tue 11/4

11:15 am-2:08 pm

2 stops21h 53m

$831

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 8/30

1:38 pm-7:00 am

2 stops24h 22m

Sydney Kingsford Smith

Sat 9/6

9:30 am-9:03 pm

2 stops28h 33m

$881

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 11/4

4:05 pm-7:00 am

2 stops67h 55m

Sydney Kingsford Smith

Mon 11/17

12:10 pm-10:42 am

1 stop17h 32m

$913

Flights are sorted by cheapest round-trip 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?

In general, February is the cheapest month to fly from State of Washington to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $999. If you are unable to visit Sydney during the month of February, then departing from State of Washington during the month March is also very affordable. Most momondo users find prices during this month for around $1,030.

What is the cheapest day to depart on your flight to Sydney?

The cheapest day to depart from State of Washington to Sydney is on a Tuesday when prices can be found for as low as $1,078. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $1,156.

What is the cheapest time of day to depart on your flight to Sydney?

According to our data, the cheapest time of day to fly to Sydney is in the evening. momondo users have found flights departing from State of Washington to Sydney in the evening for as low as $1,078. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Sydney are more costly in the morning, with an average ticket price of $1,152. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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 $1,124 when searching weeks out. 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 $1,004 on momondo.

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

You could potentially save up to 31% 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

Best Price Found	$366
Fastest flight time	18h 35m
Direct flights	None
Airports in Sydney	1 airport

The best one-way flight to Sydney from State of Washington in the past 72 hours is $366. The best round-trip flight deal from State of Washington to Sydney found on momondo in the last 72 hours is $709.

The fastest flight from State of Washington to Sydney takes 18h 35m

There are no direct flights from State of Washington to Sydney. Popular non-direct routes for this connection are Seattle/Tacoma Intl Airport - Sydney Kingsford Smith Airport and Portland Airport - Sydney Kingsford Smith Airport.

There is 1 airport near Sydney: Sydney Kingsford Smith (SYD)

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 updated daily.
How many operators does momondo search for flights from Washington to Sydney Kingsford Smith Airport?
As of August 2025, there are 8 operators available to choose from for flights from Washington to Sydney Kingsford Smith Airport.
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 layovers 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 license, 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
Alaska Airlines	PriceFrom $591	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
Qantas Airways	PriceFrom $789	Free Cancellation	Rating 7.5 888 reviews	Search Qantas Airways flights
ANA	PriceFrom $794	Free Cancellation	Rating 8.4 926 reviews	Search ANA flights
American Airlines	PriceFrom $807	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Air Canada	PriceFrom $832	Free Cancellation	Rating 7.1 9,893 reviews	Search Air Canada flights
United Airlines	PriceFrom $843	Free Cancellation	Rating 7.4 8,917 reviews	Search United Airlines flights
Hawaiian Airlines	PriceFrom $858	Free Cancellation	Rating 7.8 2,631 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $873	Free Cancellation	Rating 8.0 7,985 reviews	Search Delta flights

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington to Sydney. momondo saves you time and could save you money on your trip.

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

Yes. momondo enables you to select and highlight flights to Sydney from Washington with this policy.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Sydney from Washington.

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

Price alerts on flights to Sydney from Washington are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Cheap flights from Washington to Sydney from $366

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Sydney departing on 11/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Filter for what you want

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Air Canada flights from State of Washington to Sydney

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

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

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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

What is the cheapest month to fly to Sydney?

What is the cheapest day to depart on your flight to Sydney?

The cheapest day to depart from State of Washington to Sydney is on a Tuesday when prices can be found for as low as $1,078. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $1,156.

What is the cheapest time of day to depart on your flight to Sydney?

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

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

You could potentially save up to 31% on your flight if you consider stops on a State of Washington to Sydney flight.

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

Air Canada, Qantas Airways, and United Airlines are the most popular carriers operating from Washington to Sydney Kingsford Smith

What airlines fly to Sydney?

How long does it take to fly to Sydney?

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

Best Price Found

Fastest flight time

Direct flights

Airports in Sydney

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

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

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

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

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

Traveling to a place near Sydney?

Why use momondo?

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

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

How can momondo help me find flights 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?

An easier way to manage your Sydney trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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Airports servicing New South Wales