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Cheap flights from Washington to Sydney from $549

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 29/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
6 Aug — 13 Aug1
1 adult

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 1 August 2025.

Round-trip from

$1,102

One-way from

$549

Popular in

December

Cheapest in

February

Average price

$1,678
Air Canada
  • Air Canada
  • 19/10-26/10
  • 2 total stops
  • 46h 01m total
  • Washington to Sydney
Search Deals
Air Canada
  • Air Canada
  • 29/8
  • 1 total stop
  • 32h 50m total
  • Washington to Sydney
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($383 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($72 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 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 1 August 2025.

Sun 19/1019:15SEA - SYD
1 stop19h 05mAir Canada
Sun 26/1010:20SYD - SEA
1 stop26h 56mAir Canada
Deal found 1/8$1,102
Sun 2/1120:00SEA - SYD
2 stops22h 00mMultiple Airlines
Sun 16/1111:20SYD - SEA
1 stop22h 06mMultiple Airlines
Deal found 31/7$1,159
Sun 24/806:15PDX - SYD
1 stop32h 05mAir Canada
Tue 9/909:20SYD - PDX
1 stop22h 26mAir Canada
Deal found 1/8$1,186
Sat 6/918:05SEA - SYD
1 stop20h 00mQantas Airways
Mon 15/909:10SYD - SEA
1 stop20h 44mQantas Airways
Deal found 31/7$1,228
Fri 26/914:56PDX - SYD
1 stop23h 09mQantas Airways
Sat 4/1017:45SYD - PDX
1 stop20h 31mQantas Airways
Deal found 31/7$1,257
Tue 2/914:56PDX - SYD
1 stop23h 09mAmerican Airlines
Tue 23/917:45SYD - PDX
1 stop20h 31mAmerican Airlines
Deal found 1/8$1,263
Tue 2/914:30PDX - SYD
1 stop22h 35mMultiple Airlines
Tue 23/909:10SYD - PDX
1 stop21h 14mMultiple Airlines
Deal found 30/7$1,265
Tue 23/909:17PDX - SYD
2 stops28h 18mDelta
Tue 30/909:25SYD - PDX
2 stops23h 50mDelta
Deal found 31/7$1,296
Sat 30/805:15GEG - SYD
2 stops32h 45mUnited Airlines
Sat 6/910:20SYD - GEG
1 stop17h 18mUnited Airlines
Deal found 1/8$1,367
Sat 30/806:25GEG - SYD
1 stop32h 05mMultiple Airlines
Sat 6/917:45SYD - GEG
1 stop21h 40mMultiple Airlines
Deal found 31/7$1,381
Sun 14/913:23GEG - SYD
2 stops24h 12mDelta
Sun 21/909:25SYD - GEG
2 stops26h 00mDelta
Deal found 31/7$1,529
Sat 30/812:29GEG - SYD
1 stop25h 26mQantas Airways
Sat 6/917:45SYD - GEG
1 stop21h 40mQantas Airways
Deal found 1/8$1,633

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 1 August 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

Sun 19/10

19:15-08:20

1 stop19h 05m

Sydney Kingsford Smith

Sun 26/10

10:20-19:16

1 stop26h 56m

$1,102

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

$1,159

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sun 24/8

06:15-07:20

1 stop32h 05m

Sydney Kingsford Smith

Tue 9/9

09:20-14:46

1 stop22h 26m

$1,186

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sat 6/9

18:05-07:05

1 stop20h 00m

Sydney Kingsford Smith

Mon 15/9

09:10-12:54

1 stop20h 44m

$1,228

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 26/9

14:56-07:05

1 stop23h 09m

Sydney Kingsford Smith

Sat 4/10

17:45-21:16

1 stop20h 31m

$1,257

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 2/9

14:56-07:05

1 stop23h 09m

Sydney Kingsford Smith

Tue 23/9

17:45-21:16

1 stop20h 31m

$1,263

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 2/9

14:30-06:05

1 stop22h 35m

Sydney Kingsford Smith

Tue 23/9

09:10-13:24

1 stop21h 14m

$1,265

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 23/9

09:17-06:35

2 stops28h 18m

Sydney Kingsford Smith

Tue 30/9

09:25-16:02

1 stop23h 37m

$1,296

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 30/8

05:15-07:00

2 stops32h 45m

Sydney Kingsford Smith

Sat 6/9

10:20-10:38

1 stop17h 18m

$1,367

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 30/8

06:25-07:30

1 stop32h 05m

Sydney Kingsford Smith

Sat 6/9

17:45-22:25

1 stop21h 40m

$1,381

Flights are sorted by cheapest return flights first.

Deals found on 30/7

Showing 1-10 of 33 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 1 August 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.

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sydney. Reviews last updated 1 August 2025.
Read reviews from past customers who have flown with Air Tahiti Nui, Alaska Airlines, andDelta from Washington to Sydney. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.6
Very Good
68 reviews
Check prices

Entertainment

7.2

Boarding

8.7

Food

7.7

Overall

8.6

Crew

9.0

Comfort

8.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air Tahiti Nui
8.6
Very Good
68 reviews
Air Tahiti Nui
8.6
Very Good
68 reviews
Check prices

Entertainment

7.2

Boarding

8.7

Food

7.7

Overall

8.6

Crew

9.0

Comfort

8.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Alaska Airlines
8.0
Very Good
10,000 reviews
Air Tahiti Nui
8.6
Very Good
68 reviews
Check prices

Entertainment

7.2

Boarding

8.7

Food

7.7

Overall

8.6

Crew

9.0

Comfort

8.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Delta
8.0
Very Good
7,981 reviews
Air Tahiti Nui
8.6
Very Good
68 reviews
Check prices

Entertainment

7.2

Boarding

8.7

Food

7.7

Overall

8.6

Crew

9.0

Comfort

8.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air New Zealand
8.0
Very Good
501 reviews
Air Tahiti Nui
8.6
Very Good
68 reviews
Check prices

Entertainment

7.2

Boarding

8.7

Food

7.7

Overall

8.6

Crew

9.0

Comfort

8.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Cathay Pacific
7.6
Good
949 reviews
Air Tahiti Nui
8.6
Very Good
68 reviews
Check prices

Entertainment

7.2

Boarding

8.7

Food

7.7

Overall

8.6

Crew

9.0

Comfort

8.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

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.

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

    The cheapest airline one-way is Air Canada, with whom users have recently found tickets for as low as $549. However, be on the lookout for offers from Qantas Airways and American 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, 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
Coogee
Terrigal
Cronulla
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Bondi Beach
Randwick
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 1 August 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,240Average$1,752FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$1,304Average$1,647FlexibilityNo 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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