Ontario (ONT) to Santa Rosa (STS) flight deal from $117 USD in economy class

ASAlaska Airlines, Inc.

Round Trip•Economy

ONT

Ontario International Airport

Ontario, United States

STS

Charles M. Schulz Sonoma County Airport

Santa Rosa, United States

$391 USD

-70%$117 USD

Verified Oct 30, 2025 at 9:29 AM

December 2025

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1$397 2$332 3$302 4$312 5$312 6$302 7$312 8$322 9$312 10$302 11$312 12$312 13$312 14$322 15$322 16$312 17$332 18$352 19$412 20$422 21$431 22$422 23$347 24$322 25$322 26$546 27$507 28$447 29$392 30$387 31$302 1 2 3 4

Extremely Rare Availability

4% of dates checked are available within 10% of the lowest price

Friday, December 5th, 2025

7 round-trip options

Returning

Wed, Dec 10, 2025•5 Day Trip

$312 USD

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Thu, Dec 11, 2025•6 Day Trip

$332 USD

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Fri, Dec 12, 2025•7 Day Trip

$312 USD

Google Flights

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Sat, Dec 13, 2025•8 Day Trip

$322 USD

Google Flights

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Sun, Dec 14, 2025•9 Day Trip

$322 USD

Google Flights

Returning

Mon, Dec 15, 2025•10 Day Trip

$312 USD

Google Flights

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Tue, Dec 16, 2025•11 Day Trip

$312 USD

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