FFL Helper
Santa Rosa STS
$117
SFO → STS · Southwest Airlines
FFL Helper / San Francisco / Santa Rosa / September 2026
SFO → STS · 2026-09
San Francisco to Santa Rosa in September 2026
Dated one-way fares from San Francisco to Santa Rosa in September 2026. Use the calendar to see which days are cheaper.
Lowest this month
$117
Highest this month
$117
Sample fare
$117
Airports
SFO–STS
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Other months: September 2026 · Full route
September 2026 price calendar
September 2026
From $117
Mon
Tue
Wed
Thu
Fri
Sat
Sun
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3
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9
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12
13
14
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$117
18
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Dated fares
Booking SFO to STS in September 2026
This page is only September 2026 on the San Francisco to Santa Rosa route. Open the full route if you want the next months side by side.
Prices move as seats sell. Confirm the live itinerary before you book San Francisco to Santa Rosa in September 2026.