ONT - STS

$79 Find Cheap Flights from Ontario to Santa Rosa

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Santa Rosa departing on 3/24. 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 Santa Rosa

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

Cheapest round-trip
$116
Overall average: $266
Alaska Airlines
Sat 4/18Tue 4/21
ONT - STS • Non-stop
Cheapest one-way
$79
Alaska Airlines
Tue 3/24
ONT - STS • Non-stop
When to travel
December
Cheapest • 67% 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 Santa Rosa!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Santa Rosa 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 Ontario to Santa Rosa

Sat, Apr 18 - Tue, Apr 21
Alaska Airlines Logo
4:22 pm - 6:22 pm
ONT
-
STS
2h 00mnonstop
Alaska Airlines Logo
2:12 pm - 3:42 pm
STS
-
ONT
1h 30mnonstop
$116Alaska Airlines
Thu, Jun 18 - Sat, Jun 20
Alaska Airlines Logo
3:22 pm - 4:53 pm
ONT
-
STS
1h 31mnonstop
Alaska Airlines Logo
1:14 pm - 2:42 pm
STS
-
ONT
1h 28mnonstop
$157Alaska Airlines
Sat, Jan 24 - Tue, Jan 27
American Airlines Logo
6:27 am - 12:25 pm
ONT
-
STS
5h 58m1 stop
American Airlines Logo
12:55 pm - 6:20 pm
STS
-
ONT
5h 25m1 stop
$176American Airlines
Thu, Jan 22 - Mon, Jan 26
American Airlines Logo
6:22 am - 12:25 pm
ONT
-
STS
6h 03m1 stop
American Airlines Logo
12:55 pm - 6:20 pm
STS
-
ONT
5h 25m1 stop
$177American Airlines
Sat, Apr 18 - Tue, Apr 21
Alaska Airlines Logo
10:59 am - 5:10 pm
ONT
-
STS
6h 11m1 stop
Alaska Airlines Logo
2:12 pm - 3:42 pm
STS
-
ONT
1h 30mnonstop
$193Alaska Airlines
Thu, Jan 29 - Sun, Feb 1
American Airlines Logo
9:59 am - 3:53 pm
ONT
-
STS
5h 54m1 stop
American Airlines Logo
4:23 pm - 10:13 pm
STS
-
ONT
5h 50m1 stop
$216American Airlines
Thu, Jan 29 - Fri, Jan 30
Alaska Airlines Logo
6:00 am - 11:59 pm
ONT
-
STS
17h 59m1 stop
Alaska Airlines Logo
9:33 pm - 8:36 pm
STS
-
ONT
23h 03m1 stop
$224Alaska Airlines
Thu, Jun 18 - Fri, Jun 19
Alaska Airlines Logo
3:22 pm - 4:53 pm
ONT
-
STS
1h 31mnonstop
Alaska Airlines Logo
1:14 pm - 2:42 pm
STS
-
ONT
1h 28mnonstop
$227Alaska Airlines
Fri, May 1 - Mon, May 4
Alaska Airlines Logo
7:59 pm - 12:21 pm
ONT
-
STS
16h 22m1 stop
Alaska Airlines Logo
10:41 am - 12:08 pm
STS
-
ONT
1h 27mnonstop
$230Alaska Airlines
Thu, Jan 15 - Sat, Jan 17
American Airlines Logo
9:59 am - 3:53 pm
ONT
-
STS
5h 54m1 stop
American Airlines Logo
12:55 pm - 6:20 pm
STS
-
ONT
5h 25m1 stop
$236American Airlines
Booking Insights

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Santa Rosa, 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 Ontario to Santa Rosa is December, where tickets cost $86 (return) on average. On the other hand, the most expensive months are September and October, where the average cost of round-trip tickets is $604 and $536 respectively.

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

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 $309, prices are generally cheapest when you fly direct.

Good to know

Low seasonJune
Cheapest flight$79
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly and prices are also 61% lower on average.
Flight from Ontario to Santa Rosa

When to book flights from Ontario to Santa Rosa

Are your dates flexible? Find out the best times to travel from Ontario to Santa Rosa 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 Ontario to Santa Rosa

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

    In the last 3 days, the lowest price for a flight from Ontario to Santa Rosa was $79 for a one-way ticket and $116 for a round-trip.

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

    No

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

    Only Delta offers inflight Wi-Fi service on the Ontario to Santa Rosa flight route.

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

    The Airbus A319 is the aircraft model that flies most regularly on the Ontario to Santa Rosa flight route.

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

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

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

    The two airlines most popular with KAYAK users for flights from Ontario to Santa Rosa are Alaska Airlines and American Airlines. With an average price for the route of $309 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 $346 and an overall rating of 7.2.

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

    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 Ontario to Santa Rosa.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Santa Rosa from Ontario 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 Ontario to Santa Rosa?

    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 Santa Rosa with an airline and back to Ontario with another airline. Booking your flights between Ontario and STS 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 Ontario to Santa Rosa?

    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 Santa Rosa from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Ontario to Santa Rosa

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Santa Rosa. 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 Ontario to Santa Rosa? 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 11590 reviews
7.1Food
7.8Comfort
8.5Crew
8.1Boarding
7.0Entertainment
Airline reviews

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

2.0 MediocreAnonymous, Dec 2025
SFO - SNA
Read more Alaska Airlines reviews

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.

I wasn’t able to check in prior to arriving at the airport, I was told by the agent I may not get a seat on the plane as others were waiting for seats, I sat there for 2 hours before being assigned a seat, very stressful. The plane was delayed. Overall not a great travel experience for a 44 minute flight.

They changed our flight from a one stop 3 hour layover to a non-stop. Saved us hours and got us there sooner.

The ground crew did not supply drink or snacks during the layover in SFO. So there weren't many options. Otherwise, it was all great.

You need a n/a category. Too short a flight for food. I love flying on Alaska from Santa Rosa Airport!

Almost 3 hr delay in Settle with very little information available to passengers. They boarded the plane and we waited for a long time inside the plane as well.

I was delayed several times. Missed a very important event. The airline only provided a $12 voucher after being delayed 3 times.

Online check in didn't work. Somehow ended up with 2 Alaska rewards numbers and 1 for Hawaiian. No one at check in could figure out what to do. No one at check in could help me confirm an upcoming flight on Hawaiian Airlines.

This was likely the smallest, oldest plane I've been on. It didn't handle turbulence well and we were all jostled a lot more than I'm used to. At least it was a short flight.

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

We are too tired and frustrated to comment politely at this point

The flight crew was rude. We were in first class and no one even offered water until an hour after we were in the air. Horrible experience

Great. Quick and quiet and east. The breakfast choices were a welcome surprise!

The stewardess hit me with the food kart twice on the head and didn't say I'm sorry once. The same stewardess gave me a warm Apple Juice with No ice. The Flight was delayed for Departure 6 times, starting from 2:36pm, finally taking off 7:50pm. I was late picking up my child from the sitter by 3 hours.

Did not get the seat I selected and paid for.

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

Information on your arrival and departure airports