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Cheap flights from Washington to Sydney from $571

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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
27 Apr — 4 May1
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 28 March 2026.

Sun 19/420:00
SEA
-
SYD
1 stop18h 20m
Air Canada
Tue 5/509:20
SYD
-
SEA
1 stop17h 45m
Air Canada
Deal found 26/3$1,330
Sun 19/410:20
SEA
-
SYD
1 stop28h 00m
Air Canada
Mon 11/509:20
SYD
-
SEA
1 stop26h 10m
Air Canada
Deal found 27/3$1,349
Wed 6/514:55
SEA
-
SYD
1 stop23h 25m
Air Canada
Wed 27/509:20
SYD
-
SEA
1 stop17h 45m
Air Canada
Deal found 24/3$1,350
Sun 10/505:50
SEA
-
SYD
1 stop32h 30m
Air Canada
Tue 2/609:20
SYD
-
SEA
1 stop30h 23m
Air Canada
Deal found 25/3$1,365
Mon 13/420:00
SEA
-
SYD
2 stops23h 40m
Multiple Airlines
Mon 27/409:20
SYD
-
SEA
1 stop27h 00m
Multiple Airlines
Deal found 23/3$1,371
Sat 1/817:48
SEA
-
SYD
1 stop20h 02m
Delta
Fri 14/809:15
SYD
-
SEA
1 stop28h 13m
Delta
Deal found 23/3$1,373
Wed 6/514:55
SEA
-
SYD
1 stop23h 25m
Multiple Airlines
Wed 27/506:00
SYD
-
SEA
2 stops21h 05m
Multiple Airlines
Deal found 26/3$1,378
Mon 22/615:30
PDX
-
SYD
1 stop22h 50m
Air Canada
Tue 21/709:20
SYD
-
PDX
1 stop22h 31m
Air Canada
Deal found 27/3$1,445
Mon 25/519:45
PDX
-
SYD
1 stop18h 35m
Air Canada
Tue 2/609:20
SYD
-
PDX
1 stop22h 25m
Air Canada
Deal found 24/3$1,446
Wed 10/610:10
PDX
-
SYD
1 stop28h 10m
Air Canada
Tue 16/609:20
SYD
-
PDX
1 stop22h 25m
Air Canada
Deal found 23/3$1,448
Mon 27/419:05
PDX
-
SYD
1 stop19h 15m
Air Canada
Wed 6/509:20
SYD
-
PDX
1 stop17h 10m
Air Canada
Deal found 27/3$1,458
Sun 5/719:45
PDX
-
SYD
1 stop18h 35m
Air Canada
Tue 21/709:20
SYD
-
PDX
1 stop26h 46m
Air Canada
Deal found 28/3$1,459

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 28 March 2026.

Round-trip from

$1,330

One-way from

$571

Popular in

December

Cheapest in

August

Average price

$1,472
Air Canada
  • Air Canada
  • 19/4-5/5
  • 2 total stops
  • 36h 05m total
  • Washington to Sydney
Search Deals
5/5
  • 5/5
  • 2 total stops
  • 31h 44m total
  • Washington to Sydney
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($396 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($96 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 28 March 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 - SYD

SEASYD

Seattle/Tacoma Intl

Mon 13/4

13:45-06:50

1 stop24h 05m

Sydney Kingsford Smith

Mon 27/4

09:15-23:51

1 stop31h 36m

$1,433

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 18/4

11:40-06:50

1 stop26h 10m

Sydney Kingsford Smith

Mon 11/5

09:15-15:05

1 stop22h 50m

$1,472

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 1/8

17:48-06:50

1 stop20h 02m

Sydney Kingsford Smith

Fri 14/8

09:15-22:05

2 stops29h 50m

$1,526

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 21/5

19:55-06:50

1 stop41h 55m

Sydney Kingsford Smith

Thu 11/6

09:15-22:19

1 stop30h 04m

$1,540

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 21/9

17:47-07:05

1 stop20h 18m

Sydney Kingsford Smith

Tue 20/10

10:10-17:21

1 stop25h 11m

$1,587

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 10/5

13:41-07:00

2 stops24h 19m

Sydney Kingsford Smith

Sun 17/5

10:20-11:16

1 stop17h 56m

$1,601

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 10/5

15:15-07:05

2 stops22h 50m

Sydney Kingsford Smith

Sun 17/5

17:50-23:09

2 stops22h 19m

$1,603

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 23/7

08:00-18:50

1 stop17h 50m

Sydney Kingsford Smith

Thu 20/8

20:45-06:35

1 stop26h 50m

$1,662
Fastest return journey

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 5/5

13:41-06:55

2 stops24h 14m

Sydney Kingsford Smith

Thu 14/5

10:20-11:16

1 stop17h 56m

$1,675

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 9/5

05:00-07:00

2 stops33h 00m

Sydney Kingsford Smith

Sat 16/5

10:20-21:16

2 stops27h 56m

$1,754

Flights are sorted by cheapest return flights first.

Deals found on 25/3

Showing 1-10 of 54 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, February is the cheapest month in which you can book a flight from State of Washington to Sydney (average of $835). Flying from State of Washington to Sydney in December is currently the most expensive (average of $1,227). 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?

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 20h 18m. Fly via Delta, Alaska Airlines, or United Airlines to get the fastest option. The distance between State of Washington and Sydney is about 12796 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines to fly from State of Washington to Sydney one-way?

    The cheapest airline one-way is ANA, with whom users have recently found tickets for as low as $533. However, be on the lookout for offers from Qantas Airways and United Airlines, as they are both options that can get you from State of Washington to Sydney for a low price.

  • 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, February is the cheapest month in which you can book a flight from State of Washington to Sydney (average of $835). Flying from State of Washington to Sydney in December is currently the most expensive (average of $1,227). 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
Terrigal
Lithgow
Katoomba
Manly
Bondi Beach
Coogee
Cronulla
Leura
Randwick

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Washington to Sydney

Discover the top airline that operate flights from Washington to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 28 March 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,160Average$2,211FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Washington to Sydney?

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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