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Cheap flights from Washington to Sydney from $567

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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
15 Oct — 22 Oct1
1 adult
1 adult, Economy

Cheap 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 September 2025.

Round-trip from

$1,225

One-way from

$567

Popular in

January

Cheapest in

September

Average price

$1,415
Philippine Airlines
  • Philippine Airlines
  • 27/2-5/3
  • 2 total stops
  • 67h 25m total
  • Washington to Sydney
Search Deals
Qantas Airways
  • Qantas Airways
  • 10/2
  • 1 total stop
  • 20h 20m total
  • Washington to Sydney
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($256 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($49 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Washington to Sydney

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 September 2025.

Sat 20/915:40SEA - SYD
1 stop22h 15mAmerican Airlines
Wed 1/1012:10SYD - SEA
1 stop23h 59mAmerican Airlines
Deal found 14/9$1,228
Sun 21/915:40SEA - SYD
1 stop22h 15mAmerican Airlines
Tue 7/1010:10SYD - SEA
1 stop28h 15mAmerican Airlines
Deal found 14/9$1,230
Tue 21/1019:15SEA - SYD
1 stop19h 05mAir Canada
Sun 26/1010:20SYD - SEA
1 stop17h 11mAir Canada
Deal found 14/9$1,233
Wed 22/1007:40SEA - SYD
1 stop30h 25mAmerican Airlines
Wed 29/1011:20SYD - SEA
2 stops26h 07mAmerican Airlines
Deal found 15/9$1,236
Fri 7/1107:00SEA - SYD
1 stop17h 45mHawaiian Airlines
Sun 16/1121:40SYD - SEA
1 stop19h 17mHawaiian Airlines
Deal found 15/9$1,237
Mon 1/1218:41SEA - SYD
1 stop19h 19mAmerican Airlines
Sun 14/1217:45SYD - SEA
1 stop19h 35mAmerican Airlines
Deal found 15/9$1,245
Wed 5/1107:00SEA - SYD
1 stop17h 45mAlaska Airlines
Thu 13/1121:40SYD - SEA
1 stop17h 29mAlaska Airlines
Deal found 15/9$1,246
Tue 21/1019:15SEA - SYD
1 stop19h 05mAir Canada
Tue 4/1111:20SYD - SEA
1 stop22h 11mAir Canada
Deal found 14/9$1,248
Mon 20/1014:42SEA - SYD
1 stop23h 23mAmerican Airlines
Tue 4/1111:20SYD - SEA
2 stops21h 48mAmerican Airlines
Deal found 14/9$1,251
Mon 3/1114:55SEA - SYD
2 stops23h 05mAmerican Airlines
Mon 24/1117:45SYD - SEA
1 stop23h 39mAmerican Airlines
Deal found 14/9$1,252
Thu 30/1013:47GEG - SYD
2 stops25h 18mUnited Airlines
Thu 6/1112:10SYD - GEG
1 stop17h 32mUnited Airlines
Deal found 15/9$1,321
Tue 4/1116:05GEG - SYD
2 stops67h 55mUnited Airlines
Mon 17/1111:20SYD - GEG
2 stops28h 25mUnited Airlines
Deal found 14/9$1,377

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 September 2025.
Use the filters below to find and compare flights from Washington to Sydney that are best for you.

Fly from

Washington

Fly to

Sydney

Route

Depart

Return

Price

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 30/10

07:00-19:45

1 stop18h 45m

Sydney Kingsford Smith

Thu 6/11

21:40-07:11

2 stops28h 31m

$1,246

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Fri 5/12

16:59-07:25

1 stop19h 26m

Sydney Kingsford Smith

Fri 12/12

21:25-20:35

1 stop18h 10m

$1,246

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 26/2

07:20-19:45

1 stop17h 25m

Sydney Kingsford Smith

Thu 5/3

21:40-21:45

2 stops19h 05m

$1,246

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 25/2

07:20-19:45

1 stop17h 25m

Sydney Kingsford Smith

Sun 8/3

21:40-07:15

2 stops27h 35m

$1,246

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 6/11

07:00-19:45

1 stop17h 45m

Sydney Kingsford Smith

Tue 11/11

21:40-07:11

2 stops28h 31m

$1,246

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 28/2

07:20-19:45

1 stop17h 25m

Sydney Kingsford Smith

Sun 8/3

21:40-22:40

1 stop19h 00m

$1,246

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 4/11

12:45-08:30

1 stop24h 45m

Sydney Kingsford Smith

Fri 14/11

10:40-10:27

1 stop18h 47m

$1,270

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 30/9

13:00-06:55

1 stop24h 55m

Sydney Kingsford Smith

Wed 15/10

11:20-12:02

1 stop18h 42m

$1,270

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 4/11

14:10-08:30

1 stop23h 20m

Sydney Kingsford Smith

Thu 13/11

10:40-17:00

1 stop25h 20m

$1,270

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 9/11

18:30-19:45

1 stop30h 15m

Sydney Kingsford Smith

Thu 13/11

21:40-07:11

2 stops28h 31m

$1,272

Flights are sorted by cheapest return flights first.

Deals found on 13/9

Showing 1-10 of 45 results
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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, May is the cheapest month in which you can book a flight from State of Washington to Sydney (average of $129). Flying from State of Washington to Sydney in October is currently the most expensive (average of $171). 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.

What is the cheapest time of day to fly from WA to SYD?

Find hourly flight availability from Washington to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 15 September 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from State of Washington to Sydney as you normally would.

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 17h 25m. Fly via Alaska Airlines, 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 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 $568. However, be on the lookout for offers from American Airlines and Air New Zealand, 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, May is the cheapest month in which you can book a flight from State of Washington to Sydney (average of $129). Flying from State of Washington to Sydney in October is currently the most expensive (average of $171). 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
Katoomba
Penrith
Manly
Terrigal
Lithgow
Randwick
Bondi Beach
Coogee
Cronulla
Leura

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Top 2 airlines flying from Washington to Sydney

Discover the top 2 airlines 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 15 September 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,201Average$1,697FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$1,263Average$1,730FlexibilityNo cancel feeOn-time67%
Search Air Canada 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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