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Cheap flights from Washington to Sydney from $750

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 19/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
14 Sep — 21 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Washington to Sydney

Enter your travel dates to find the best prices.

Cheapest flights from Washington to Sydney
Explore the most affordable flight options available from Washington to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 August 2026.

Sun 30/815:00 -
1 stop23h 20m
Sun 13/909:20 -
1 stop26h 12m
Deal found 12/8$1,268
Mon 14/910:50 -
1 stop27h 30m
Tue 22/909:20 -
1 stop21h 57m
Deal found 11/8$1,318
Mon 14/910:50 -
1 stop27h 30m
Mon 21/907:00 -
2 stops24h 17m
Deal found 11/8$1,323
Sun 30/815:00 -
1 stop23h 20m
Tue 15/909:20 -
1 stop17h 45m
Deal found 14/8$1,324
Wed 11/1115:15 -
1 stop23h 20m
Mon 30/1111:20 -
1 stop26h 02m
Deal found 11/8$1,327
Wed 4/1115:15 -
1 stop23h 20m
Wed 18/1111:20 -
1 stop17h 07m
Deal found 13/8$1,328
Sun 30/819:20 -
2 stops22h 20m
Tue 15/909:20 -
1 stop26h 12m
Deal found 14/8$1,345
Wed 26/808:00 -
1 stop17h 50m
Sun 30/820:45 -
1 stop26h 29m
Deal found 11/8$1,484
Sun 8/1117:23 -
1 stop20h 37m
Tue 17/1114:05 -
1 stop25h 35m
Deal found 13/8$1,529
Wed 16/916:21 -
1 stop21h 44m
Wed 23/917:50 -
1 stop21h 48m
Deal found 13/8$1,533
Mon 17/807:46 -
1 stop18h 04m
Sun 30/820:45 -
1 stop26h 29m
Deal found 11/8$1,533
Wed 2/1207:02 -
1 stop28h 18m
Tue 15/1211:50 -
1 stop18h 34m
Deal found 12/8$1,540

Find flight deals from Washington to Sydney

Keep the following information in mind while searching for Washington to Sydney flight deals. Data was last updated 15 August 2026.

Round-trip from

$1,268

One-way from

$750

Popular in

December

Cheapest in

August

Average price

$1,125
Air Canada
  • Air Canada
  • 30/8-13/9
  • 2 total stops
  • 49h 32m total
  • Washington to Sydney
Search Deals
Qantas Airways
  • Qantas Airways
  • 19/8
  • 1 total stop
  • 21h 20m total
  • Washington to Sydney
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($460 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($109 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from 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, Cheapflights users made 647,157 searches. Data last updated 15 August 2026.
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

Cheapest return flight

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sun 13/9

10:50-07:20

1 stop27h 30m

Sydney Kingsford Smith

Sun 20/9

09:20-22:47

1 stop30h 27m

$1,438

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 16/9

16:21-07:05

1 stop21h 44m

Sydney Kingsford Smith

Wed 23/9

17:50-22:38

1 stop21h 48m

$1,533

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 2/12

07:02-06:20

1 stop28h 18m

Sydney Kingsford Smith

Wed 16/12

11:50-11:24

1 stop18h 34m

$1,540

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 2/12

13:45-09:05

2 stops24h 20m

Sydney Kingsford Smith

Tue 15/12

11:20-15:19

2 stops22h 59m

$1,546

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 2/12

06:00-08:30

2 stops31h 30m

Sydney Kingsford Smith

Tue 15/12

10:40-12:29

2 stops20h 49m

$1,547

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Thu 1/10

13:38-06:55

2 stops24h 17m

Sydney Kingsford Smith

Sun 1/11

11:50-11:38

1 stop17h 48m

$1,611

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 28/10

11:05-07:30

2 stops26h 25m

Sydney Kingsford Smith

Thu 19/11

10:40-16:52

2 stops25h 12m

$1,618

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Thu 24/9

19:45-11:25

2 stops22h 40m

Sydney Kingsford Smith

Mon 28/9

06:00-09:31

2 stops20h 31m

$1,758
Fastest return journey

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Mon 25/1

05:00-19:45

2 stops19h 45m

Sydney Kingsford Smith

Mon 1/2

21:40-20:50

1 stop18h 10m

$1,778

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Sat 23/1

17:50-19:45

1 stop30h 55m

Sydney Kingsford Smith

Thu 28/1

21:40-22:33

2 stops19h 53m

$1,792

Flights are sorted by cheapest return flights first.

Deals found on 13/8

Showing 1-10 of 43 resultsSorted by cheapest first
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Best time to book a flight from Washington to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Washington with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington to Sydney

What is the cheapest month to book a flight from State of Washington to Sydney?

Currently, August is the cheapest month in which you can book a flight from State of Washington to Sydney (average of $1,136). Flying from State of Washington to Sydney in December is currently the most expensive (average of $2,409). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost for a return flight from State of Washington to Sydney?

Airfare is typical for this route at the moment.
State of Washington to Sydney flights typically cost between $869 and $1,583 in August.
The cheapest return price found within the last 5 days was $1,268 on Air Canada (30 Aug–13 Sept).

How far ahead should I book a flight from State of Washington to Sydney?

To ensure you get the cheapest price possible for a flight from State of Washington to Sydney, you should look to book at least 47 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Related info for your journey

Find useful and relevant information for your journey from Washington to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Sydney from Washington?

    Most people fly into Sydney Kingsford Smith (SYD) if they book a flight to Sydney from Washington. Kingsford Smith is conveniently located just 7.5 km from Sydney’s city centre.

  • How long is the flight from State of Washington to Sydney?

    There are many flights that can get you from State of Washington to Sydney in 26h 25m. Fly via Air Canada, United Airlines, or Delta to get the fastest option. The distance between State of Washington and Sydney is about 12463 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the most popular routes from State of Washington to Sydney?

    When deciding which route to take from State of Washington to Sydney, consider Seattle/Tacoma Intl - Sydney Kingsford Smith, Portland - Sydney Kingsford Smith or Spokane - Sydney Kingsford Smith, as they are the most popular.

  • Can I find deals for flights from Washington to Sydney that include hotel bookings?

    Yes. In addition to deals on Washington to Sydney flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Washington to Sydney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Sydney.

  • Can I find deals for business class flights from Washington to Sydney?

    Yes. Cheapflights offers flight deals from Washington to Sydney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from State of Washington to Sydney?

    Currently, August is the cheapest month in which you can book a flight from State of Washington to Sydney (average of $1,136). Flying from State of Washington to Sydney in December is currently the most expensive (average of $2,409). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Sydney?

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

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Deals for Washington to Sydney flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Washington to Sydney?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Sydney from Washington.

Can Cheapflights find flights from Washington to Sydney with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Washington to Sydney, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Washington to Sydney become cheaper?

Yes, Cheapflights offers price alerts on Washington to Sydney flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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