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$583+ 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 9/17. Fares are subject to change and may not be available on all flights or dates of travel.
STS — SYD
Aug 20 — Aug 271
Wed 8/20
Wed 8/27
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 August 15, 2025.

Round-trip from

$1,139
(Alaska Airlines)

One-way from

$583
(American Airlines)

Popular in

December

Cheapest in

February

Average price

$1,150
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. 12% potential increase in price ($172 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($42 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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 August 15, 2025.

This Alaska Airlines deal was found by Cheapflights users on 8/13. 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.
Sat 9/133:07 pmSTS - SYD
1 stop22h 58mAlaska Airlines
Sat 9/209:10 amSYD - STS
2 stops28h 13mAlaska Airlines
Deal found 8/13$1,139
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/133:07 pmSTS - SYD
1 stop23h 23mMultiple Airlines
Sat 9/205:45 pmSYD - STS
1 stop18h 27mMultiple Airlines
Deal found 8/13$1,407
This Qantas Airways deal was found by Cheapflights users on 8/15. 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.
Mon 12/81:30 pmSTS - SYD
1 stop22h 55mQantas Airways
Fri 1/97:30 pmSYD - STS
2 stops36h 26mQantas Airways
Deal found 8/15$1,630
This Alaska Airlines deal was found by Cheapflights users on 8/15. 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 12/81:30 pmSTS - SYD
1 stop24h 30mAlaska Airlines
Tue 1/611:15 amSYD - STS
1 stop18h 16mAlaska Airlines
Deal found 8/15$1,940
This Alaska Airlines deal was found by Cheapflights users on 8/15. 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 12/811:55 amSTS - SYD
2 stops26h 05mAlaska Airlines
Wed 1/711:15 amSYD - STS
1 stop20h 41mAlaska Airlines
Deal found 8/15$1,944
This Air Tahiti Nui deal was found by Cheapflights users on 8/13. 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 Air Tahiti Nui is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/77:45 amSTS - SYD
3 stops38h 55mAir Tahiti Nui
Tue 11/118:55 amSYD - STS
3 stops27h 59mAir Tahiti Nui
Deal found 8/13$1,989
This Alaska Airlines deal was found by Cheapflights users on 8/15. 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 12/82:45 pmSTS - SYD
2 stops23h 15mAlaska Airlines
Thu 1/811:15 amSYD - STS
2 stops26h 52mAlaska Airlines
Deal found 8/15$1,994
This Qantas Airways deal was found by Cheapflights users on 8/15. 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.
Mon 12/81:30 pmSTS - SYD
1 stop22h 55mQantas Airways
Mon 1/55:45 pmSYD - STS
1 stop25h 33mQantas Airways
Deal found 8/15$2,023

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 August 15, 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

Sat 9/13

11:54 am-7:05 am

2 stops26h 11m

Sydney Kingsford Smith

Sat 9/20

9:10 am-8:23 pm

2 stops28h 13m

$1,139

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Sat 9/13

3:07 pm-7:30 am

1 stop23h 23m

Sydney Kingsford Smith

Sat 9/20

5:45 pm-7:12 pm

1 stop18h 27m

$1,407

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Mon 12/8

1:30 pm-7:25 am

1 stop22h 55m

Sydney Kingsford Smith

Fri 1/9

7:30 pm-12:56 pm

2 stops36h 26m

$1,630

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Mon 12/8

1:30 pm-9:00 am

1 stop24h 30m

Sydney Kingsford Smith

Wed 1/7

11:15 am-12:56 pm

1 stop20h 41m

$1,940

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Mon 12/8

1:30 pm-9:00 am

1 stop24h 30m

Sydney Kingsford Smith

Tue 1/6

11:15 am-10:31 am

1 stop18h 16m

$1,940

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Wed 9/17

1:00 pm-7:05 am

2 stops25h 05m

$583

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Tue 9/23

3:07 pm-7:05 am

1 stop22h 58m

$583

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Mon 9/22

12:59 pm-7:05 am

2 stops25h 06m

$583

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Sat 9/20

1:00 pm-7:05 am

2 stops25h 05m

$583

Santa RosaSydney

STS - SYD

STSSYD

Santa Rosa Sonoma County

Thu 9/18

1:00 pm-7:05 am

2 stops25h 05m

$583

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 12 results
1
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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 $1,031). Flying from Santa Rosa to Sydney in December is currently the most expensive (average of $1,619). 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 $1,031). Flying from Santa Rosa to Sydney in December is currently the most expensive (average of $1,619). 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
Wollongong
Parramatta
Manly
Coogee

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