STS - ONT

$109 Find Cheap Flights from Santa Rosa to Ontario - Compare and Save

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 9/2. 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

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Everything you should know

Cheapest round-trip
$150
Typical prices: $286-$366
Alaska Airlines
Wed 8/19Sat 8/22
STS - ONT • Non-stop
Cheapest one-way
$109
Alaska Airlines
Wed 9/2
STS - ONT • Non-stop
Top airlines
Cheapest • from $150 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Alaska Airlines. Average duration is 1h 28m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
When to travel
Cheapest • 47% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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

Wed, Aug 19 - Sat, Aug 22
Alaska Airlines Logo
2:09 pm - 3:47 pm
STS
-
ONT
1h 38mnonstop
Alaska Airlines Logo
4:32 pm - 6:12 pm
ONT
-
STS
1h 40mnonstop
$150Alaska Airlines
Wed, Aug 19 - Sat, Aug 22
Alaska Airlines Logo
2:09 pm - 3:47 pm
STS
-
ONT
1h 38mnonstop
Alaska Airlines Logo
4:32 pm - 6:12 pm
ONT
-
STS
1h 40mnonstop
$151Alaska Airlines
Wed, Aug 19 - Sun, Aug 23
Alaska Airlines Logo
2:09 pm - 3:47 pm
STS
-
ONT
1h 38mnonstop
Alaska Airlines Logo
4:27 pm - 6:07 pm
ONT
-
STS
1h 40mnonstop
$157Alaska Airlines
Fri, Sep 18 - Mon, Sep 21
Alaska Airlines Logo
2:09 pm - 3:47 pm
STS
-
ONT
1h 38mnonstop
Alaska Airlines Logo
4:27 pm - 6:07 pm
ONT
-
STS
1h 40mnonstop
$158Alaska Airlines
Wed, Aug 19 - Sun, Aug 23
Alaska Airlines Logo
2:09 pm - 3:47 pm
STS
-
ONT
1h 38mnonstop
Alaska Airlines Logo
4:27 pm - 6:07 pm
ONT
-
STS
1h 40mnonstop
$161Alaska Airlines
Thu, Aug 20 - Mon, Aug 24
Alaska Airlines Logo
2:09 pm - 3:47 pm
STS
-
ONT
1h 38mnonstop
Alaska Airlines Logo
4:27 pm - 6:07 pm
ONT
-
STS
1h 40mnonstop
$164Alaska Airlines
Thu, Sep 10 - Sat, Sep 12
Alaska Airlines Logo
2:09 pm - 3:47 pm
STS
-
ONT
1h 38mnonstop
Alaska Airlines Logo
4:27 pm - 6:07 pm
ONT
-
STS
1h 40mnonstop
$167Alaska Airlines
Thu, Oct 1 - Sun, Oct 4
Alaska Airlines Logo
2:09 pm - 3:47 pm
STS
-
ONT
1h 38mnonstop
Alaska Airlines Logo
5:48 pm - 7:19 pm
ONT
-
STS
1h 31mnonstop
$171Alaska Airlines
Fri, Sep 11 - Mon, Sep 14
Alaska Airlines Logo
2:09 pm - 3:47 pm
STS
-
ONT
1h 38mnonstop
Alaska Airlines Logo
4:27 pm - 6:07 pm
ONT
-
STS
1h 40mnonstop
$177Alaska Airlines
Wed, Aug 19 - Sun, Aug 23
Southwest Logo
6:00 am - 1:35 pm
STS
-
ONT
7h 35m
2 stops
Southwest Logo
6:25 am - 1:35 pm
ONT
-
STS
7h 10m
1 stop
$182Southwest
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 August.

What’s the cheapest day of the week to fly from Santa Rosa to Ontario?

The average price of all round-trip flights from Santa Rosa to Ontario clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Ontario on a Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Monday is the most expensive day to fly from Santa Rosa to Ontario. For your return ticket, we recommend flying on a Wednesday and avoiding Sundays for the best deals.

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 April, where tickets cost $197 (return) on average. On the other hand, the most expensive months are November and October, where the average cost of round-trip tickets is $778 and $756 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 $287, prices are generally cheapest when you fly direct.

Good to know

Low seasonFebruary
Cheapest flight$109
Best time to beat the crowds with an average 38% drop in price.
Most popular time to fly and prices are also 48% 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 5 days, the lowest price for a flight from Santa Rosa to Ontario was $109 for a one-way ticket and $150 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?

    There are nonstop flights from Santa Rosa to Ontario on a daily basis.

  • 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 $232 and an overall rating of 7.9, Alaska Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $326 and an overall rating of 7.1.

  • 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 $173 or less one-way and $227 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.
7.9
Alaska AirlinesOverall score based on 12607 reviews
7.1Food
7.0Entertainment
7.8Comfort
8.5Crew
8.1Boarding
Airline reviews

I had to change my flight last minute due to a medical emergency. Their agent was compassionate and extremely helpful. This airlines really cares about making travel, for fun, work, or an emergency a customer-focused experience. Thank you!

10.0 ExcellentMary Kay, Apr 2026
STS - PSP
Read more Alaska Airlines reviews

I had to change my flight last minute due to a medical emergency. Their agent was compassionate and extremely helpful. This airlines really cares about making travel, for fun, work, or an emergency a customer-focused experience. Thank you!

No issues and clear sailing. What a preferred to have sat in one of empty seats other than my assigned seat that would be my only complaint if it was to complain.

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.

Flight was delayed two hours; for an hour and a half flight?! And so we missed our connecting flight to Rome because of the long walk between the terminals. Hoping to hear back from Alaska about some compensation for our missed flight and night stay in Los Angeles.

It was my first time flying Alaska Airlines and first time flying from Santa Rosa airport. The staff was very professional and friendly. Their instructions were clear and any question was answered satisfactorily. My seat was comfortable and the in-flight beverage service very adequate for the duration of the flight. We arrived ahead of the scheduled landing time and deplaning was simple. I look forward to flying with Alaska again.

I’m New to Alaska Airlines. I was not able to connect to WiFi on either leg of my flights to/from Santa Rosa. Otherwise, it was an enjoyable ride.

All good. Great food and entertainment when there isn’t any on a one hour flight

The first flight attendant who served refreshments was not pleasant at all. No eye contact, no smile, I used my “please “ and “thank you “ and all but had pretzels thrown at me. Next one far surpassed pleasantries and more like Alaska Air! Good leg room, comfortable seats. Boarding was without flaws. I didn’t order food….

All was good. Flight from STS to Burbank was on a new plane; flight back was on a plane that was showing its age.

Im not sure what could have been better. flight was quick and efficient, everyone was kind and made the experience far better than other flights I have made. This is specific to the Santa Rosa Airport crew.

The flight attendant was very polite and attentive. The food was good.

Flight cancelled. Twice. And no communication. No gate agent. Went past boarding time and had to go and see email from AA. Airport communication was bad

It was so much better than expected, Ohare is not such a pleasant experience but American Airlines with the new, clean aeroplane and free Wi-Fi was outstanding and the crew so pleasant and helpful.

Was put into a seat right behind the toilet that had no entertainment possible but did have plenty of leg room over noisy part of plane.

The experience at checkin for my American Airlines flight from Sacramento to LAX was very good including the assistance I received in getting my bags checked in and boarding passes printed. Was pleasantly surprised the my bags were checked through all the way to my destination at Clark International Airport in Angeles, Philippines.

Smooth flight. From the early boarding and all were on board before departure time and arrived early in ONT. Great crew. Thank you!!!!

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

Everything was great except for the wifi was junk. Crew was super friendly and helpful

The flight landed at LAX we were then bussed to collect our bags. That process took nearly as long as the flight. Luckily we weren't in a hurry!

It was fine. I didn't love the food but it was at least a real attempt at serving a meal, unlike my earlier flight from Nashville to Dallas.

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

Information on your arrival and departure airports