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$1,221+ Cheap flights from Santa Rosa (STS) to Sydney (SYD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
STS — SYD
Feb 19 — Feb 261
Thu 2/19
Thu 2/26
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 January 20, 2026.

This Alaska Airlines deal was found by Cheapflights users on 1/20. 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 4/17:05 am
STS
-
SYD
2 stops41h 45m
Multiple Airlines
Tue 4/148:45 pm
SYD
-
STS
2 stops39h 28m
Multiple Airlines
Deal found 1/20$1,221
This Alaska Airlines deal was found by Cheapflights users on 1/19. 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 5/215:21 pm
STS
-
SYD
2 stops32h 29m
Multiple Airlines
Tue 5/268:45 pm
SYD
-
STS
2 stops30h 26m
Multiple Airlines
Deal found 1/19$1,240
This Alaska Airlines deal was found by Cheapflights users on 1/19. 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 5/208:20 am
STS
-
SYD
2 stops41h 30m
Multiple Airlines
Tue 6/98:45 pm
SYD
-
STS
2 stops31h 17m
Multiple Airlines
Deal found 1/19$1,244
This Alaska Airlines deal was found by Cheapflights users on 1/19. 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 5/208:20 am
STS
-
SYD
2 stops41h 30m
Multiple Airlines
Sun 5/248:45 pm
SYD
-
STS
2 stops36h 41m
Multiple Airlines
Deal found 1/19$1,255
This Alaska Airlines deal was found by Cheapflights users on 1/17. 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 6/181:14 pm
STS
-
SYD
2 stops36h 36m
Multiple Airlines
Tue 7/218:45 pm
SYD
-
STS
2 stops30h 32m
Multiple Airlines
Deal found 1/17$1,257
This Alaska Airlines deal was found by Cheapflights users on 1/19. 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 5/178:20 am
STS
-
SYD
2 stops41h 30m
Multiple Airlines
Fri 6/58:45 pm
SYD
-
STS
2 stops30h 26m
Multiple Airlines
Deal found 1/19$1,258
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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 6/1110:57 am
STS
-
SYD
2 stops38h 53m
Multiple Airlines
Tue 8/48:45 pm
SYD
-
STS
2 stops30h 32m
Multiple Airlines
Deal found 1/20$1,259
This Alaska Airlines deal was found by Cheapflights users on 1/19. 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 5/248:20 am
STS
-
SYD
2 stops41h 30m
Multiple Airlines
Fri 6/58:45 pm
SYD
-
STS
2 stops30h 26m
Multiple Airlines
Deal found 1/19$1,263
This Alaska Airlines deal was found by Cheapflights users on 1/19. 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 5/215:21 pm
STS
-
SYD
2 stops32h 29m
Multiple Airlines
Sun 6/78:45 pm
SYD
-
STS
2 stops36h 41m
Multiple Airlines
Deal found 1/19$1,268
This Alaska Airlines deal was found by Cheapflights users on 1/19. 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 5/178:20 am
STS
-
SYD
2 stops41h 30m
Multiple Airlines
Sun 5/248:45 pm
SYD
-
STS
2 stops36h 41m
Multiple Airlines
Deal found 1/19$1,274
This Alaska Airlines deal was found by Cheapflights users on 1/19. 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 5/208:20 am
STS
-
SYD
2 stops41h 30m
Multiple Airlines
Sat 6/68:45 pm
SYD
-
STS
2 stops41h 37m
Multiple Airlines
Deal found 1/19$1,275
This Alaska Airlines deal was found by Cheapflights users on 1/17. 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 6/181:14 pm
STS
-
SYD
2 stops36h 36m
Multiple Airlines
Fri 7/178:45 pm
SYD
-
STS
2 stops40h 32m
Multiple Airlines
Deal found 1/17$1,279

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 January 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$1,221
(Alaska Airlines)

Popular in

December

Cheapest in

February

Average price

$1,247
Provider with most accurate pricing for Santa Rosa Sonoma County-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Santa Rosa Sonoma County-Sydney Kingsford Smith flights.
Search Deals
From Santa Rosa Sonoma County to Sydney Kingsford Smith
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($153 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 20, 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

Thu 5/21

5:21 pm-6:50 pm

2 stops32h 29m

Sydney Kingsford Smith

Tue 6/9

8:45 pm-11:02 am

2 stops31h 17m

$1,240

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Wed 4/1

7:05 am-6:50 pm

2 stops41h 45m

Sydney Kingsford Smith

Thu 4/16

8:45 pm-7:13 pm

2 stops39h 28m

$1,240

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Wed 5/20

8:20 am-6:50 pm

2 stops41h 30m

Sydney Kingsford Smith

Tue 6/9

8:45 pm-11:02 am

2 stops31h 17m

$1,244

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Wed 5/20

8:20 am-6:50 pm

2 stops41h 30m

Sydney Kingsford Smith

Tue 5/26

8:45 pm-10:11 am

2 stops30h 26m

$1,244

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Thu 6/18

1:14 pm-6:50 pm

2 stops36h 36m

Sydney Kingsford Smith

Sun 7/19

8:45 pm-10:17 am

2 stops30h 32m

$1,257

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Thu 6/11

5:52 pm-6:50 pm

2 stops31h 58m

Sydney Kingsford Smith

Fri 8/7

8:45 pm-10:17 am

2 stops30h 32m

$1,287

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Sun 5/24

8:20 am-6:50 pm

2 stops41h 30m

Sydney Kingsford Smith

Sat 6/6

8:45 pm-9:22 pm

2 stops41h 37m

$1,294

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Sun 5/17

8:20 am-6:50 pm

2 stops41h 30m

Sydney Kingsford Smith

Sat 6/6

8:45 pm-9:22 pm

2 stops41h 37m

$1,294

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Thu 6/18

1:14 pm-6:50 pm

2 stops36h 36m

Sydney Kingsford Smith

Thu 7/16

8:45 pm-8:17 pm

2 stops40h 32m

$1,307

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Sun 5/24

8:20 am-6:50 pm

2 stops41h 30m

Sydney Kingsford Smith

Thu 6/11

8:45 pm-4:53 pm

2 stops37h 08m

$1,314

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/17

Showing 1-10 of 13 results
1
2
  • Most accurate provider: When it comes to deals on Santa Rosa-Sydney flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Santa Rosa-Sydney flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

  • 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

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