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Cheap flights from Washington to Sydney from $627

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 26/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
30 Jul — 6 Aug1
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 30 June 2026.

Wed 1/716:30
SEA
-
SYD
1 stop33h 40m
ANA
Wed 8/711:45
SYD
-
SEA
2 stops23h 47m
ANA
Deal found 30/6$1,410
Fri 18/917:30
PDX
-
SYD
2 stops25h 20m
Multiple Airlines
Thu 24/913:15
SYD
-
PDX
3 stops44h 20m
Multiple Airlines
Deal found 29/6$1,413
Sun 28/620:25
SEA
-
SYD
1 stop41h 25m
Delta
Sun 12/709:15
SYD
-
SEA
1 stop22h 40m
Delta
Deal found 25/6$1,416
Tue 28/715:33
SEA
-
SYD
1 stop22h 22m
Air New Zealand
Tue 11/810:20
SYD
-
SEA
1 stop18h 05m
Air New Zealand
Deal found 29/6$1,419
Wed 5/819:05
SEA
-
SYD
1 stop18h 50m
Air New Zealand
Wed 12/810:20
SYD
-
SEA
1 stop18h 06m
Air New Zealand
Deal found 29/6$1,421
Sun 5/710:29
SEA
-
SYD
1 stop27h 26m
United Airlines
Sun 19/709:30
SYD
-
SEA
2 stops28h 40m
United Airlines
Deal found 30/6$1,423
Mon 29/611:05
SEA
-
SYD
2 stops26h 45m
Delta
Sun 12/709:15
SYD
-
SEA
2 stops26h 18m
Delta
Deal found 28/6$1,425
Sun 5/717:04
SEA
-
SYD
1 stop20h 56m
Air New Zealand
Sun 19/710:20
SYD
-
SEA
1 stop21h 10m
Air New Zealand
Deal found 30/6$1,426
Wed 1/716:30
SEA
-
SYD
1 stop23h 55m
ANA
Tue 7/720:55
SYD
-
SEA
1 stop34h 30m
ANA
Deal found 30/6$1,429
Wed 1/717:30
SEA
-
SYD
1 stop20h 20m
Delta
Wed 8/709:15
SYD
-
SEA
1 stop24h 25m
Delta
Deal found 30/6$1,434
Mon 29/617:30
SEA
-
SYD
1 stop20h 20m
Delta
Wed 8/709:15
SYD
-
SEA
1 stop28h 12m
Delta
Deal found 25/6$1,435
Sun 2/805:50
SEA
-
SYD
2 stops34h 35m
Multiple Airlines
Wed 19/811:45
SYD
-
SEA
2 stops27h 57m
Multiple Airlines
Deal found 29/6$1,436

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 30 June 2026.

Round-trip from

$1,413

One-way from

$627

Popular in

December

Cheapest in

August

Average price

$1,595
18/9-24/9
  • 18/9-24/9
  • 5 total stops
  • 69h 40m total
  • Washington to Sydney
Search Deals
26/9
  • 26/9
  • 2 total stops
  • 39h 10m total
  • Washington to Sydney
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($498 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($115 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 30 June 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

Sat 1/8

17:04-07:00

1 stop20h 56m

Sydney Kingsford Smith

Sun 9/8

09:30-21:10

2 stops28h 40m

$1,506

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 19/8

16:21-07:30

1 stop22h 09m

Sydney Kingsford Smith

Wed 9/9

17:50-22:38

1 stop21h 48m

$1,519

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 19/8

16:21-07:30

1 stop22h 09m

Sydney Kingsford Smith

Wed 9/9

17:50-22:25

2 stops21h 35m

$1,554

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 29/7

15:16-07:30

2 stops23h 14m

Sydney Kingsford Smith

Wed 5/8

12:00-20:42

1 stop25h 42m

$1,557

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 21/9

16:21-07:30

1 stop22h 09m

Sydney Kingsford Smith

Mon 5/10

18:50-23:35

1 stop22h 45m

$1,573

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 22/9

16:21-07:05

1 stop21h 44m

Sydney Kingsford Smith

Tue 6/10

18:50-22:33

2 stops21h 43m

$1,579

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 2/12

16:47-06:25

1 stop18h 38m

Sydney Kingsford Smith

Tue 15/12

11:15-17:21

1 stop25h 06m

$1,579

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 30/7

16:21-07:30

2 stops22h 09m

Sydney Kingsford Smith

Sat 15/8

17:50-22:15

1 stop21h 25m

$1,580

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 22/11

05:45-08:30

2 stops31h 45m

Sydney Kingsford Smith

Wed 9/12

10:40-13:00

1 stop21h 20m

$1,584

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 27/10

14:11-06:25

2 stops46h 14m

Sydney Kingsford Smith

Thu 5/11

11:15-12:17

1 stop20h 02m

$1,640

Flights are sorted by cheapest return flights first.

Deals found on 26/6

Showing 1-10 of 50 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 $206). Flying from State of Washington to Sydney in January is currently the most expensive (average of $1,197). 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?

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 20h 35m. Fly via United Airlines, Qantas Airways, 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 cheapest airlines to fly from State of Washington to Sydney one-way?

    The cheapest airline one-way is Qantas Airways, with whom users have recently found tickets for as low as $536. However, be on the lookout for offers from United Airlines and Air Canada, 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 $206). Flying from State of Washington to Sydney in January is currently the most expensive (average of $1,197). 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
Terrigal
Randwick
Leura
Bondi Beach
Coogee

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 30 June 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,159Average$2,209FlexibilityNo 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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