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$668+ 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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
STS — SYD
Feb 14 — Feb 211
Sat 2/14
Sat 2/21
1 adult, Economy
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Cheap 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 January 15, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,171
(oojo)

One-way from

$668
(Alaska Airlines)

Popular in

December

Cheapest in

February

Average price

$1,245
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. 11% potential increase in price ($156 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find 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 January 15, 2026.

This oojo deal was found by Cheapflights users on 1/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/287:00 am
STS
-
SYD
2 stops30h 45m
Air New Zealand
Sat 3/77:15 pm
SYD
-
STS
2 stops46h 42m
Air New Zealand
Deal found 1/14$1,171
This American Airlines deal was found by Cheapflights users on 1/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/281:03 pm
STS
-
SYD
2 stops24h 57m
American Airlines
Sat 3/711:20 am
SYD
-
STS
1 stop17h 51m
American Airlines
Deal found 1/14$1,392
This Alaska Airlines deal was found by Cheapflights users on 1/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/297:05 am
STS
-
SYD
2 stops41h 45m
Multiple Airlines
Sun 4/58:45 pm
SYD
-
STS
2 stops19h 30m
Multiple Airlines
Deal found 1/14$1,425
This Alaska Airlines deal was found by Cheapflights users on 1/13. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/157:23 pm
STS
-
SYD
1 stop18h 42m
Alaska Airlines
Tue 10/2711:15 am
SYD
-
STS
1 stop17h 52m
Alaska Airlines
Deal found 1/13$1,438
This Alaska Airlines deal was found by Cheapflights users on 1/13. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/127:23 pm
STS
-
SYD
1 stop18h 42m
Alaska Airlines
Fri 10/3011:15 am
SYD
-
STS
1 stop30h 30m
Alaska Airlines
Deal found 1/13$1,446
This Alaska Airlines deal was found by Cheapflights users on 1/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/257:02 pm
STS
-
SYD
2 stops30h 43m
Multiple Airlines
Sun 4/58:45 pm
SYD
-
STS
2 stops19h 30m
Multiple Airlines
Deal found 1/14$1,471
This Alaska Airlines deal was found by Cheapflights users on 1/13. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/117:00 am
STS
-
SYD
1 stop31h 05m
Alaska Airlines
Sun 10/2511:15 am
SYD
-
STS
1 stop17h 52m
Alaska Airlines
Deal found 1/13$1,476
This Alaska Airlines deal was found by Cheapflights users on 1/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/127:23 pm
STS
-
SYD
1 stop18h 42m
Alaska Airlines
Sun 10/2511:15 am
SYD
-
STS
1 stop17h 52m
Alaska Airlines
Deal found 1/14$1,478
This Alaska Airlines deal was found by Cheapflights users on 1/13. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/117:00 am
STS
-
SYD
1 stop31h 05m
Alaska Airlines
Fri 10/3011:15 am
SYD
-
STS
1 stop30h 30m
Alaska Airlines
Deal found 1/13$1,483
This Alaska Airlines deal was found by Cheapflights users on 1/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/117:00 am
STS
-
SYD
1 stop31h 05m
Alaska Airlines
Mon 10/2611:15 am
SYD
-
STS
1 stop24h 52m
Alaska Airlines
Deal found 1/14$1,496
This Qantas Airways deal was found by Cheapflights users on 1/13. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/143:05 pm
STS
-
SYD
1 stop22h 25m
Multiple Airlines
Wed 10/285:45 pm
SYD
-
STS
1 stop18h 22m
Multiple Airlines
Deal found 1/13$1,499

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 January 15, 2026.
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

Sat 2/28

7:00 am-8:45 am

2 stops30h 45m

Sydney Kingsford Smith

Sat 3/7

7:15 pm-10:57 pm

2 stops46h 42m

$1,171

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Wed 3/25

7:02 pm-7:45 pm

2 stops30h 43m

Sydney Kingsford Smith

Sun 4/5

8:45 pm-11:15 pm

2 stops19h 30m

$1,471

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Fri 3/27

7:53 pm-8:05 am

1 stop18h 12m

Sydney Kingsford Smith

Sun 4/5

9:10 am-11:30 am

1 stop19h 20m

$1,478

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Fri 3/27

7:53 pm-8:05 am

1 stop18h 12m

Sydney Kingsford Smith

Mon 4/6

9:10 am-11:30 am

1 stop19h 20m

$1,478

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Sat 3/28

7:53 pm-8:05 am

1 stop18h 12m

Sydney Kingsford Smith

Mon 4/6

9:10 am-11:30 am

1 stop19h 20m

$1,478

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Wed 3/25

7:53 pm-9:00 am

1 stop19h 07m

Sydney Kingsford Smith

Sat 4/4

10:10 am-7:13 pm

1 stop27h 03m

$1,478

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Thu 3/26

7:53 pm-9:00 am

1 stop19h 07m

Sydney Kingsford Smith

Mon 4/6

9:10 am-7:13 pm

1 stop27h 03m

$1,478

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Thu 3/26

12:10 pm-9:00 am

1 stop26h 50m

Sydney Kingsford Smith

Sat 4/4

10:10 am-7:13 pm

1 stop27h 03m

$1,478

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Thu 3/26

12:10 pm-9:00 am

1 stop26h 50m

Sydney Kingsford Smith

Sun 4/5

9:10 am-11:30 am

1 stop19h 20m

$1,478

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Wed 3/25

7:53 pm-9:00 am

1 stop19h 07m

Sydney Kingsford Smith

Sun 4/5

9:10 am-11:30 am

1 stop19h 20m

$1,478

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/13

Showing 1-10 of 23 results
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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 January.
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, August is the cheapest month in which you can book a flight from Santa Rosa to Sydney (average of $499). Flying from Santa Rosa to Sydney in December is currently the most expensive (average of $836). 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.

  • How long is the flight from Santa Rosa to Sydney?

    Airlines like Air New Zealand and Alaska Airlines fly from Santa Rosa to Sydney in about 18h 12m. The time it takes to get you to your destination can typically vary by up to 12h 33m. There are 7430 mi between Santa Rosa and Sydney. This flight may include one or multiple stops.

  • 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, August is the cheapest month in which you can book a flight from Santa Rosa to Sydney (average of $499). Flying from Santa Rosa to Sydney in December is currently the most expensive (average of $836). 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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