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Cheap flights from Washington to Sydney from $561

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 19/11. 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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Cheap return flights

Air Canada Logo
19:15 - 08:20SEA-SYD
19h 05m1 stop
Air Canada Logo
10:20 - 09:31SYD-SEA
17h 11m1 stop
$1,088Air Canada
Find Deal
Sun, 19 Oct - Mon, 27 Oct
Air Canada Logo
05:30 - 07:20SEA-SYD
32h 50m1 stop
Air Canada Logo
09:20 - 22:16SYD-SEA
29h 56m1 stop
$1,107Air Canada
Find Deal
Sat, 30 Aug - Sun, 14 Sep
Logo
20:00 - 13:00SEA-SYD
22h 00m2 stops
Logo
11:20 - 14:26SYD-SEA
22h 06m1 stop
$1,143
Find Deal
Sun, 2 Nov - Sun, 16 Nov
Logo
20:00 - 13:55SEA-SYD
22h 55m2 stops
Logo
11:20 - 09:31SYD-SEA
17h 11m1 stop
$1,145
Find Deal
Sun, 2 Nov - Sun, 16 Nov
United Airlines Logo
17:14 - 07:00SEA-SYD
20h 46m1 stop
United Airlines Logo
10:20 - 21:22SYD-SEA
28h 02m2 stops
$1,248United Airlines
Find Deal
Sat, 30 Aug - Sun, 14 Sep
United Airlines Logo
19:34 - 06:55SEA-SYD
18h 21m1 stop
United Airlines Logo
10:20 - 12:07SYD-SEA
18h 47m1 stop
$1,252United Airlines
Find Deal
Sat, 30 Aug - Sun, 14 Sep
American Airlines Logo
11:40 - 07:05SEA-SYD
26h 25m2 stops
American Airlines Logo
09:10 - 21:58SYD-SEA
29h 48m1 stop
$1,257American Airlines
Find Deal
Tue, 16 Sep - Tue, 23 Sep
Qantas Airways Logo
14:50 - 07:05PDX-SYD
23h 15m1 stop
Qantas Airways Logo
17:45 - 21:16SYD-PDX
20h 31m1 stop
$1,261Qantas Airways
Find Deal
Fri, 26 Sep - Sat, 4 Oct
Qantas Airways Logo
14:40 - 08:05SEA-SYD
23h 25m1 stop
Qantas Airways Logo
11:15 - 13:02SYD-SEA
20h 47m1 stop
$1,264Qantas Airways
Find Deal
Wed, 15 Oct - Sat, 8 Nov
American Airlines Logo
14:56 - 07:05PDX-SYD
23h 09m1 stop
American Airlines Logo
09:10 - 14:23SYD-PDX
22h 13m1 stop
$1,458American Airlines
Find Deal
Fri, 5 Sep - Fri, 12 Sep

American Airlines flights from State of Washington to Sydney

Our best American Airlines deals on State of Washington to Sydney flight tickets
American Airlines
16 Sept
SEA11:40Seattle/Tacoma Intl
26h 25m
2 stops
SYD07:05Sydney Kingsford Smith
23 Sept
SYD09:10Sydney Kingsford Smith
29h 48m
1 stop
SEA21:58Seattle/Tacoma Intl
$1,257
Find similar
American Airlines
19 Aug
SEA14:32Seattle/Tacoma Intl
23h 58m
1 stop
SYD07:30Sydney Kingsford Smith
28 Aug
SYD17:45Sydney Kingsford Smith
20h 48m
1 stop
SEA21:33Seattle/Tacoma Intl
$1,267
Find similar
American Airlines
5 Sept
PDX14:56Portland
23h 09m
1 stop
SYD07:05Sydney Kingsford Smith
12 Sept
SYD09:10Sydney Kingsford Smith
22h 13m
1 stop
PDX14:23Portland
$1,458
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
30 Aug
SEA17:14Seattle/Tacoma Intl
20h 46m
1 stop
SYD07:00Sydney Kingsford Smith
14 Sept
SYD10:20Sydney Kingsford Smith
28h 02m
2 stops
SEA21:22Seattle/Tacoma Intl
$1,248
Find similar
United Airlines
30 Aug
SEA19:34Seattle/Tacoma Intl
18h 21m
1 stop
SYD06:55Sydney Kingsford Smith
14 Sept
SYD10:20Sydney Kingsford Smith
18h 47m
1 stop
SEA12:07Seattle/Tacoma Intl
$1,252
Find similar
United Airlines
19 Aug
SEA19:34Seattle/Tacoma Intl
18h 21m
1 stop
SYD06:55Sydney Kingsford Smith
28 Aug
SYD09:30Sydney Kingsford Smith
28h 24m
2 stops
SEA20:54Seattle/Tacoma Intl
$1,290
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from State of Washington to Sydney that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 78,305 searches. Data last updated 9 August 2025.
Use the filters below to find and compare flights from Washington to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 19/10

19:15-08:20

1 stop19h 05m

Sydney Kingsford Smith

Mon 27/10

10:20-09:31

1 stop17h 11m

$1,088

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 30/8

05:30-07:20

1 stop32h 50m

Sydney Kingsford Smith

Sun 14/9

09:20-22:16

1 stop29h 56m

$1,107

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 2/11

20:00-13:00

2 stops22h 00m

Sydney Kingsford Smith

Sun 16/11

11:20-14:26

1 stop22h 06m

$1,143

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 2/11

20:00-13:55

2 stops22h 55m

Sydney Kingsford Smith

Sun 16/11

11:20-09:31

1 stop17h 11m

$1,145

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 30/8

17:14-07:00

1 stop20h 46m

Sydney Kingsford Smith

Sun 14/9

10:20-21:22

2 stops28h 02m

$1,248

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 30/8

19:34-06:55

1 stop18h 21m

Sydney Kingsford Smith

Sun 14/9

10:20-12:07

1 stop18h 47m

$1,252

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 16/9

11:40-07:05

2 stops26h 25m

Sydney Kingsford Smith

Tue 23/9

09:10-21:58

1 stop29h 48m

$1,257

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 26/9

14:50-07:05

1 stop23h 15m

Sydney Kingsford Smith

Sat 4/10

17:45-21:16

1 stop20h 31m

$1,261

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 15/10

14:40-08:05

1 stop23h 25m

Sydney Kingsford Smith

Sat 8/11

11:15-13:02

1 stop20h 47m

$1,264

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 5/9

14:56-07:05

1 stop23h 09m

Sydney Kingsford Smith

Fri 12/9

09:10-14:23

1 stop22h 13m

$1,458

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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See travel insights to Sydney from

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?

The month of February is, on average, the cheapest month to fly to Sydney from State of Washington, with most prices found around $1,531. If you aren’t able to travel to Sydney during the month of February, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $1,579.

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

Our data shows that Monday is the least expensive day to fly to Sydney. Tickets to fly out on this day can be as low as $1,482. The most expensive day to fly to Sydney is Saturday, with ticket prices averaging around $1,790.

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 afternoon. momondo users have found flights departing from State of Washington to Sydney in the afternoon for as low as $1,415. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $1,737 on average. Flights to Sydney from State of Washington in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

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 $1,722 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 $1,539 on momondo.

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

You could potentially save up to 10% 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

$561

Fastest flight time

18h 21m

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 $561. The best return flight deal from State of Washington to Sydney found on momondo in the last 72 hours is $1,088.
The fastest flight from State of Washington to Sydney takes 18h 21m
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 refreshed on a daily basis.

  • 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?

    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 AirlinesPriceFrom $1,224Free cancellationRating
7.4
8,924 reviews
Search United Airlines flights
Air CanadaPriceFrom $1,288Free cancellationRating
7.1
9,901 reviews
Search Air Canada flights

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Terrigal
Katoomba
Lithgow
Penrith
Leura
Manly
Bondi Beach
Coogee
Randwick
Cronulla
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.

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