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$731+ Cheap flights from Santa Rosa (STS) to Sydney (SYD)

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 5/26. Fares are subject to change and may not be available on all flights or dates of travel.
STS — SYD
Jan 25 — Feb 11
Sun 1/25
Sun 2/1
1 adult, Economy
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Cheap flight deals from Santa Rosa to Sydney

Cheapest flights from Santa Rosa to Sydney
Explore the most affordable flight options available from Santa Rosa to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 26, 2025.

This Qatar Airways deal was found by Cheapflights users on 12/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/276:00 amSTS - SYD
2 stops41h 50mMultiple Airlines
Fri 1/22:00 pmSYD - STS
3 stops51h 17mMultiple Airlines
Deal found 12/25$5,047

Find flight deals from Santa Rosa to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Santa Rosa (STS) to Sydney (SYD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,255
(Alaska Airlines)

One-way from

$731
(Alaska Airlines)

Popular in

December

Cheapest in

February

Average price

$1,595
Provider with most accurate pricing for Santa Rosa Sonoma County-Sydney Kingsford Smith flight deals.
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Provider most trusted by Cheapflights users for Santa Rosa Sonoma County-Sydney Kingsford Smith flights.
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From Santa Rosa Sonoma County to Sydney Kingsford Smith
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One-way flight from Santa Rosa Sonoma County to Sydney Kingsford Smith
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Highest demand for flights based on searches. 13% potential increase in price ($181 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Santa Rosa 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 2,558,603 searches. Data last updated December 26, 2025.
Use the filters below to find and compare flights from Santa Rosa to Sydney that are best for you.

Fly from

Santa Rosa

Fly to

Sydney

Route

Depart

Return

Price

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Wed 6/3

2:16 pm-6:50 pm

2 stops35h 34m

Sydney Kingsford Smith

Fri 6/19

8:45 pm-10:17 am

2 stops30h 32m

$1,255

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Thu 6/4

2:16 pm-6:50 pm

2 stops35h 34m

Sydney Kingsford Smith

Sat 6/20

8:45 pm-10:17 am

2 stops30h 32m

$1,255

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Wed 6/3

2:16 pm-6:50 pm

2 stops35h 34m

Sydney Kingsford Smith

Sat 6/20

8:45 pm-10:17 am

2 stops30h 32m

$1,255

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Thu 6/4

2:16 pm-6:50 pm

2 stops35h 34m

Sydney Kingsford Smith

Fri 6/19

8:45 pm-10:17 am

2 stops30h 32m

$1,255

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Thu 6/4

2:16 pm-6:50 pm

2 stops35h 34m

Sydney Kingsford Smith

Sun 6/21

8:45 pm-10:17 am

2 stops30h 32m

$1,255

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Fri 6/5

8:20 am-6:50 pm

2 stops41h 30m

Sydney Kingsford Smith

Sat 6/20

8:45 pm-4:53 pm

2 stops37h 08m

$1,272

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Sun 6/7

8:20 am-6:50 pm

2 stops41h 30m

Sydney Kingsford Smith

Tue 6/23

8:45 pm-4:53 pm

2 stops37h 08m

$1,272

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Sun 6/7

8:20 am-6:50 pm

2 stops41h 30m

Sydney Kingsford Smith

Thu 6/18

8:45 pm-6:31 pm

2 stops62h 46m

$1,284

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Tue 6/2

8:20 am-6:50 pm

2 stops41h 30m

Sydney Kingsford Smith

Thu 6/18

8:45 pm-11:02 am

2 stops55h 17m

$1,288

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Mon 6/8

7:38 pm-6:50 pm

2 stops54h 12m

Sydney Kingsford Smith

Sat 6/20

8:45 pm-4:53 pm

2 stops37h 08m

$1,329

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/24

Showing 1-10 of 20 results
1
2

Compare providers for flights from Santa Rosa to Sydney

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Santa Rosa to Sydney in December.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Santa Rosa-Sydney flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Santa Rosa-Sydney flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Santa Rosa-Sydney flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Santa Rosa-Sydney flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Santa Rosa-Sydney flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Santa Rosa to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Santa Rosa with our price prediction graph.
Estimated round-trip 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 Santa Rosa to Sydney

What is the cheapest month to book a flight from Santa Rosa to Sydney?

Currently, February is the cheapest month in which you can book a flight from Santa Rosa to Sydney (average of $440). Flying from Santa Rosa to Sydney in December is currently the most expensive (average of $838). 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.

Related info for your journey

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

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

    Yes. In addition to deals on Santa Rosa to Sydney flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Santa Rosa to Sydney?

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

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

    Yes. Cheapflights offers flight deals from Santa Rosa 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 Santa Rosa to Sydney?

    Currently, February is the cheapest month in which you can book a flight from Santa Rosa to Sydney (average of $440). Flying from Santa Rosa to Sydney in December is currently the most expensive (average of $838). 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

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Manly
Coogee

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