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

ASAlaska Airlines, Inc.

Round Trip•Economy

STS

Charles M. Schulz Sonoma County Airport

Santa Rosa, United States

ONT

Ontario International Airport

Ontario, United States

$417 USD

-72%$117 USD

Verified Nov 2, 2025 at 4:06 PM

December 2025

Today

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1$432 2$332 3$322 4$322 5$302 6$302 7$312 8$302 9$302 10$302 11$322 12$302 13$368 14$332 15$312 16$312 17$312 18$352 19$384 20$348 21$312 22$399 23$454 24$387 25$362 26$437 27$587 28$452 29$362 30$362 31$312 1 2 3 4

Extremely Rare Availability

2% of dates checked are available within 10% of the lowest price

Wednesday, December 17th, 2025

6 round-trip options

Returning

Mon, Dec 22, 2025•5 Day Trip

$413 USD

Google Flights

Returning

Tue, Dec 23, 2025•6 Day Trip

$358 USD

Google Flights

Returning

Wed, Dec 24, 2025•7 Day Trip

$312 USD

Google Flights

Returning

Thu, Dec 25, 2025•8 Day Trip

$332 USD

Google Flights

Returning

Fri, Dec 26, 2025•9 Day Trip

$584 USD

Google Flights

Returning

Sat, Dec 27, 2025•10 Day Trip

$507 USD

Google Flights