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

$392 USD

-70%$117 USD

Verified Nov 2, 2025 at 4:04 PM

December 2025

Today

Mon

Tue

Wed

Thu

Fri

Sat

Sun

1$397 2$332 3$302 4$322 5$312 6$302 7$312 8$322 9$302 10$302 11$312 12$312 13$324 14$322 15$322 16$332 17$363 18$382 19$442 20$422 21$431 22$422 23$342 24$322 25$332 26$516 27$507 28$447 29$392 30$387 31$302 1 2 3 4

Extremely Rare Availability

3% of dates checked are available within 10% of the lowest price

Saturday, December 20th, 2025

7 round-trip options

Returning

Thu, Dec 25, 2025•5 Day Trip

$472 USD

Google Flights

Returning

Fri, Dec 26, 2025•6 Day Trip

$547 USD

Google Flights

Returning

Sat, Dec 27, 2025•7 Day Trip

$747 USD

Google Flights

Returning

Sun, Dec 28, 2025•8 Day Trip

$562 USD

Google Flights

Returning

Mon, Dec 29, 2025•9 Day Trip

$472 USD

Google Flights

Returning

Tue, Dec 30, 2025•10 Day Trip

$472 USD

Google Flights

Returning

Wed, Dec 31, 2025•11 Day Trip

$422 USD

Google Flights