$157 Cheap Alaska Airlines flights Ontario (ONT) to Santa Rosa (STS)

View $157 flight on Sat, Aug 16, 2025Opens in a new window

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$157 Cheap Alaska Airlines flights Ontario (ONT) to Santa Rosa (STS)

Prices were available within the past 7 days and start at $157 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Flights from Ontario (ONT) to Santa Rosa (STS)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Sonoma County
Airlines serving
Alaska Airlines, American Airlines, Hawaiian Airlines
Popular airline
American Airlines
Distance
422 mi

Frequently asked questions

How much is an Alaska Airlines flight from Los Angeles - Ontario Intl. Airport (ONT) to Sonoma County Airport (STS)?
Set the "Price (lowest to highest)" filter on Expedia to search for cheap Alaska Airlines return flights from ONT to STS. Affordable one-way fares from $157 are available too.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from ONT to STS with Alaska Airlines?
January is one of the least expensive months to get away to Santa Rosa with Alaska Airlines. You could also find excellent prices on one-way and return fares in February.
What is the cheapest time to book flights from Los Angeles - Ontario Intl. Airport (ONT) to Sonoma County Airport (STS) with Alaska Airlines?
Look for affordable Alaska Airlines flights from Los Angeles - Ontario Intl. Airport (ONT) to Sonoma County Airport (STS) one to three months prior to your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare class and journey, the best day of the week to book a domestic flight is usually Sunday and the most expensive day is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Alaska Airlines fly nonstop from Los Angeles - Ontario Intl. Airport (ONT) to Sonoma County Airport (STS)?
To see if there's a direct route from ONT to STS with Alaska Airlines or other airlines, select the "Nonstop" filter when searching for tickets.
What is the earliest Alaska Airlines flight from ONT to STS?
Browse Alaska Airlines's earliest flights from ONT to STS by selecting our "Morning" and "Early Morning" filters. Not only will you get to where you're going sooner, early departures also have a 20% less chance of being canceled.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Alaska Airlines fly into in Santa Rosa?
Sonoma County Airport (STS) is the main Santa Rosa gateway for Alaska Airlines flights from Los Angeles - Ontario Intl. Airport (ONT).
Why fly with Alaska Airlines from ONT to STS?
Alaska Airlines makes traveling from ONT to STS enjoyable with a rewarding loyalty program and top-tier customer service. You could even start earning points with Mileage Plan. Be sure to sign up to our free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Alaska Airlines flight from Los Angeles - Ontario Intl. Airport (ONT) to Sonoma County Airport (STS)?
Changes are typically free within 24 hours of making your booking, but your airline may add a charge after that time. For further information about altering your flights, go to your "Trips," select your flight and click on "Manage Booking." If you'd like the flexibility to make changes without being charged, tick the "No cancel fee" or "Changes included" filter when planning your next escape.

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