STS - ONT

$79 Find Cheap Flights from Santa Rosa to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Santa Rosa to Ontario departing on 3/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Santa Rosa to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Santa Rosa to Ontario, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$112
Typical prices: $186-$310
Alaska Airlines
Sat 4/25Wed 5/6
STS - ONT • Non-stop
Cheapest one-way
$79
Typical prices: $171-$263
Alaska Airlines
Sat 3/21
STS - ONT • Non-stop
Top airlines
Alaska Airlines
Cheapest • from $112 (round-trip)
Alaska Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
March
Cheapest • 44% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ontario!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Santa Rosa to Ontario (STS-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Santa Rosa to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Santa Rosa to Ontario

Sat, Apr 25 - Wed, May 6
Alaska Airlines Logo
10:41 am - 12:08 pm
STS
-
ONT
1h 27mnonstop
Alaska Airlines Logo
12:48 pm - 2:20 pm
ONT
-
STS
1h 32mnonstop
$112Alaska Airlines
Mon, Apr 13 - Thu, Apr 23
Alaska Airlines Logo
2:12 pm - 3:42 pm
STS
-
ONT
1h 30mnonstop
Alaska Airlines Logo
12:48 pm - 2:20 pm
ONT
-
STS
1h 32mnonstop
$117Alaska Airlines
Fri, Apr 17 - Thu, Apr 23
Alaska Airlines Logo
2:12 pm - 3:42 pm
STS
-
ONT
1h 30mnonstop
Alaska Airlines Logo
12:48 pm - 2:20 pm
ONT
-
STS
1h 32mnonstop
$127Alaska Airlines
Wed, Apr 15 - Sun, Apr 19
Alaska Airlines Logo
2:12 pm - 3:42 pm
STS
-
ONT
1h 30mnonstop
Alaska Airlines Logo
4:28 pm - 6:28 pm
ONT
-
STS
2h 00mnonstop
$137Alaska Airlines
Fri, Apr 17 - Sat, Apr 18
Alaska Airlines Logo
2:12 pm - 3:42 pm
STS
-
ONT
1h 30mnonstop
Alaska Airlines Logo
4:22 pm - 6:22 pm
ONT
-
STS
2h 00mnonstop
$147Alaska Airlines
Thu, Jul 9 - Tue, Jul 14
Alaska Airlines Logo
1:14 pm - 2:42 pm
STS
-
ONT
1h 28mnonstop
Alaska Airlines Logo
3:22 pm - 4:53 pm
ONT
-
STS
1h 31mnonstop
$157Alaska Airlines
Sun, Mar 22 - Mon, Mar 23
Alaska Airlines Logo
2:18 pm - 3:48 pm
STS
-
ONT
1h 30mnonstop
Alaska Airlines Logo
4:22 pm - 6:22 pm
ONT
-
STS
2h 00mnonstop
$167Alaska Airlines
Sun, Apr 19 - Tue, Apr 21
Alaska Airlines Logo
2:18 pm - 3:48 pm
STS
-
ONT
1h 30mnonstop
Alaska Airlines Logo
4:22 pm - 6:22 pm
ONT
-
STS
2h 00mnonstop
$177Alaska Airlines
Sun, Mar 22 - Tue, Mar 24
Alaska Airlines Logo
2:18 pm - 3:48 pm
STS
-
ONT
1h 30mnonstop
Alaska Airlines Logo
4:22 pm - 6:22 pm
ONT
-
STS
2h 00mnonstop
$187Alaska Airlines
Wed, Mar 18 - Sun, Mar 22
Alaska Airlines Logo
2:12 pm - 3:42 pm
STS
-
ONT
1h 30mnonstop
Alaska Airlines Logo
4:28 pm - 6:28 pm
ONT
-
STS
2h 00mnonstop
$197Alaska Airlines
Booking Insights

KAYAK's insights & trends for Santa Rosa to Ontario flights

Get data-powered insights and trends into flights from Santa Rosa to Ontario to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Santa Rosa to Ontario?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Santa Rosa to Ontario departing in April.

What is the cheapest month to fly from Santa Rosa to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Santa Rosa to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Santa Rosa to Ontario is March, where tickets cost $197 (return) on average. On the other hand, the most expensive months are October and November, where the average cost of round-trip tickets is $756 and $732 respectively.

Can I save money by flying with a layover from Santa Rosa to Ontario?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $197, prices are generally cheapest when you fly direct.

Good to know

Low seasonOctober
Cheapest flight$79
Best time to beat the crowds but there is an average 113% increase in price.
Most popular time to fly and prices are also 45% lower on average.
Flight from Santa Rosa to Ontario

When to book flights from Santa Rosa to Ontario

Are your dates flexible? Find out the best times to travel from Santa Rosa to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Santa Rosa to Ontario

  • What is the cheapest flight from Santa Rosa to Ontario?

    In the last 3 days, the lowest price for a flight from Santa Rosa to Ontario was $79 for a one-way ticket and $112 for a round-trip.

  • Do I need a passport to fly between Santa Rosa and Ontario?

    No

  • Which airlines offer Wi-Fi service onboard planes from Santa Rosa to Ontario?

    Alaska Airlines, and Delta offer inflight Wi-Fi service on the Santa Rosa to Ontario flight route.

  • Which aircraft models fly most regularly from Santa Rosa to Ontario?

    The Embraer 175 is the aircraft model that flies most regularly on the Santa Rosa to Ontario flight route.

  • Which airline alliances offer flights from Santa Rosa to Ontario?

    oneworld is the only airline alliance operating flights between Santa Rosa and Ontario.

  • On which days can I fly direct from Santa Rosa to Ontario?

    You can catch a nonstop flight from Santa Rosa to Ontario on on Monday, Tuesday, Wednesday, Thursday, Friday, and Saturday.

  • Which is the best airline for flights from Santa Rosa to Ontario, Alaska Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from Santa Rosa to Ontario are Alaska Airlines and American Airlines. With an average price for the route of $217 and an overall rating of 8.0, Alaska Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $296 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from Santa Rosa to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Santa Rosa to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Santa Rosa to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Santa Rosa is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Santa Rosa to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Santa Rosa with another airline. Booking your flights between Santa Rosa and ONT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Santa Rosa to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Santa Rosa up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Santa Rosa to Ontario

  • Looking for a cheap flight? 25% of our users found flights on this route for $157 or less round-trip.

Prefer to fly direct from Santa Rosa to Ontario?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Santa Rosa Sonoma County to Ontario.
Find which airlines fly direct from Santa Rosa Sonoma County Airport to Ontario Airport, which days they fly and book direct flights.

Direct departures

Santa Rosa Sonoma County to Ontario

Monday

Alaska Airlines

Alaska Airlines

Tuesday

Alaska Airlines

Alaska Airlines

Wednesday

Alaska Airlines

Alaska Airlines

Thursday

Alaska Airlines

Alaska Airlines

Friday

Alaska Airlines

Alaska Airlines

Saturday

Alaska Airlines

Alaska Airlines

Sunday

Alaska Airlines

Alaska Airlines

See more direct flights

Direct returns

Ontario to Santa Rosa Sonoma County

Monday

Alaska Airlines

Alaska Airlines

Tuesday

Alaska Airlines

Alaska Airlines

Wednesday

Alaska Airlines

Alaska Airlines

Thursday

Alaska Airlines

Alaska Airlines

Friday

Alaska Airlines

Alaska Airlines

Saturday

Alaska Airlines

Alaska Airlines

Sunday

Alaska Airlines

Alaska Airlines

See more direct flights

Reviews of the top airlines flying from Santa Rosa to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Santa Rosa to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Santa Rosa to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 11874 reviews
7.1Food
7.0Entertainment
7.8Comfort
8.5Crew
8.1Boarding
Airline reviews

The he whole flight was very smooth on every aspects.

10.0 ExcellentPhilip, Feb 2026
SFO - SAN
Read more Alaska Airlines reviews

The he whole flight was very smooth on every aspects.

Due to plane delays on both legs of my flight home, I had to be rerouted from Santa Rosa to Las Vegas on Skywest and then to DCA on American. SkyWest airlines sat on runway in Las Vegas for 20 minutes waiting for gate to clear. My boarding pass for American that I was given by Alaska was incomplete and the Las Vegas airport lacked signage and departure boards. I barely made my flight bc it was so confusing. American Airlines has a much better wireless connection. I’ll never fly Alaska again. It clearly has problems.

I paid for wifi and it never worked... it was miserable. I couldn't access my shared files to work on the plane, it didn't work on my phone. I paid for nothing but frustration and continual refreshing, hoping it would work

Again, very smooth and all of the Alaska folks were great. They continue to meet all my needs.

Overall it was fine, however one of my two checked bags did not arrive and I was told it was left in Palm Springs. I don't understand how one of the two bags made it through fine but the other got lost .

The whole experience went smoothly with no hitches along the way.

The flight was excellent and very friendly and helpful staff. Will travel again and recommend to friends. Thank you

Did not have In flight service on my round trip due to turbulence. I did not partake in In flight entertainment. Flight descending into LAX was very turbulent. It would have been nice if the pilot communicated with us during that rough descent into LAX to ease the minds of some of us more nervous flyers.

They canceled my flight with only a couple hours before checking in at the airport and offered no alternatives to get home.

Was notified the departure would be late. Later on it was suddenly on time. Traffic by LAX was horrendous, and I missed the flight.

The flight was significantly delayed for 6.5 hours because of snow. There was no communication once the plane returned to the gate regarding when the flight would resume. Other flights were departing while our flight was being unloaded for reasons unknown. Our flight also seemed out of the queue regarding further deicing, refueling, and waiting to Taxi to the runway.

They are always late and seats was also not having working charger

did not have enough meal for first class passengers so offer us snack

Amazing I love American. I’ll never fly anyone else if I can help it.

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

After the door had been closed, the cockpit makes an announcement that catering is running late and it is not the airline's fault. It is their fault in the sense that we had to sit for 2 hours or more when we could have stayed in the terminal. Poor communications between catering and airline. This caused a young man to lose his temper and he went storming out hitting objects. He had complained to the gate agent that he had already waited at the gate 7 hours and when can the airplane leave? Airilnes do a poor job of explaining delays, maintenance issues, etc. whereas being truthful may gain more sympathy or understanding.

We were told the flight was delayed 5 times, then it was moved to the next day.

The experience with American Airlines was good, although the Philippines Airlines flight was much better (better seats, better food, better entertainment options, overall better). Again, the MIA to LAX flight was fine, but nothing in comparison to the comfort and accommodations of the Philippines Airlines flight from LAX to MNL.

Loved the crew . Absolutely no complaints. Except for luggage lost

Wish some foods provided rather than just biscuit/cookie for flight more than 2 hours

Everything you need to know for your flight from Santa Rosa to Ontario

Information on your arrival and departure airports