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 1/25. 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
$237
Overall average: $71
American Airlines
Tue 12/9Sun 12/14
STS - ONT • 1 stop
Cheapest non-stop
$112
Alaska Airlines
Sat 3/28Wed 4/1
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
December
Cheapest • 75% price drop
December
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

Tue, Dec 9 - Sun, Dec 14
American Airlines Logo
12:57 pm - 6:19 pmSTS-ONT
5h 22m1 stop
American Airlines Logo
9:59 am - 3:56 pmONT-STS
5h 57m1 stop
$237American Airlines
Find Deal
Thu, Dec 4 - Sun, Dec 7
American Airlines Logo
4:26 pm - 10:00 pmSTS-ONT
5h 34m1 stop
American Airlines Logo
6:17 am - 12:27 pmONT-STS
6h 10m1 stop
$238American Airlines
Find Deal
Sat, Dec 13 - Mon, Dec 15
American Airlines Logo
12:57 pm - 6:19 pmSTS-ONT
5h 22m1 stop
American Airlines Logo
6:17 am - 12:27 pmONT-STS
6h 10m1 stop
$257American Airlines
Find Deal
Thu, Dec 4 - Mon, Dec 8
American Airlines Logo
12:57 pm - 6:19 pmSTS-ONT
5h 22m1 stop
American Airlines Logo
6:17 am - 12:27 pmONT-STS
6h 10m1 stop
$258American Airlines
Find Deal
Tue, Jan 6 - Tue, Jan 13
Alaska Airlines Logo
2:24 pm - 3:08 pmSTS-ONT
24h 44m1 stop
Alaska Airlines Logo
4:03 pm - 10:35 amONT-STS
18h 32m1 stop
$264Alaska Airlines
Find Deal
Tue, Jan 6 - Mon, Jan 12
Alaska Airlines Logo
6:00 am - 3:42 pmSTS-ONT
9h 42m1 stop
Alaska Airlines Logo
4:03 pm - 12:22 pmONT-STS
20h 19m2 stops
$270Alaska Airlines
Find Deal
Tue, Jan 6 - Sat, Jan 10
Alaska Airlines Logo
2:24 pm - 12:14 amSTS-ONT
9h 50m1 stop
Alaska Airlines Logo
4:03 pm - 10:35 amONT-STS
18h 32m1 stop
$274Alaska Airlines
Find Deal
Tue, Jan 6 - Mon, Jan 12
Alaska Airlines Logo
12:03 pm - 12:14 amSTS-ONT
12h 11m2 stops
Alaska Airlines Logo
4:03 pm - 12:22 pmONT-STS
20h 19m2 stops
$275Alaska Airlines
Find Deal
Sat, Dec 13 - Mon, Dec 15
American Airlines Logo
12:57 pm - 6:19 pmSTS-ONT
5h 22m1 stop
American Airlines Logo
9:59 am - 3:56 pmONT-STS
5h 57m1 stop
$277American Airlines
Find Deal
Thu, Dec 4 - Mon, Dec 8
American Airlines Logo
4:26 pm - 10:00 pmSTS-ONT
5h 34m1 stop
American Airlines Logo
6:17 am - 12:27 pmONT-STS
6h 10m1 stop
$278American Airlines
Find Deal
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.

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 Friday, as we generally find the cheapest rates on that day for this route. On the other hand, Wednesday is the most expensive day to fly from Santa Rosa to Ontario. For your return ticket, we recommend flying on a Sunday and avoiding Wednesdays 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 December, where tickets cost $71 (return) on average. On the other hand, the most expensive months are October and June, where the average cost of round-trip tickets is $756 and $306 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 $756, prices are generally cheapest when you fly direct.

Good to know

Low seasonOctober
Cheapest flight$188
Best time to beat the crowds but there is an average 162% increase in price.
Most popular time to fly and prices are also 76% 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 Boeing 737-800 Passenger/BBJ2 (winglets) 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.

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

    The two airlines most popular with KAYAK users for flights from Santa Rosa to Ontario are Alaska Airlines and Avelo Airlines. With an average price for the route of $357 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Avelo Airlines is also a great choice for the route, with an average price of $80 and an overall rating of 7.6.

  • 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.

Reviews of the top 3 airlines serving 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 11282 reviews
7.8Comfort
8.5Crew
7.1Food
8.1Boarding
7.0Entertainment
Airline reviews

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

10.0 ExcellentAnonymous, Nov 2025LAX - STS
Read more Alaska Airlines reviews

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

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.

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.

Excellent service from staff at the gate as well as flight attendants on board. Seats had more room than many other airlines and if they were just a little better cushioned they would have been perfect.

Staff inside Portland terminal were rude, made us fell rushed and not at all accommodating to seniors. For this alone I will probably never booked from them again.

Such great crew, from checkin to the plane. So friendly and helpful, I was genuinely impressed.

Staff at Gate desk were helpful. My connecting flight from the first part of my trip Kona to Seattle was late. I had to run through SeaTac Seattle to catch my flight to San Jose. They made an exception to let me board. On my return trip San Jose to San Diego and San Diego to Honolulu the same thing happened. One flight arrived late and I had to run through the terminal to catch my connection. There are no Gluten-free & Vegan options meals and snacks to purchase.

I liked the crew. There was no food flight to short

Surprisingly was one of the better flights I’ve been on

Short 2-hour flight, we took off on time, ETA was earlier than stated, no interaction needed with stewards, no food, no entertainment on such a short flight.

Avelo provided exactly what I expected. They are a low-cost option with no frills but the experience was comfortable and the staff was great! I will be using them in the future for trips when cost is a priority for me.

Expect nothing and you will be fine. Seats are crammed.

Terrible landing. Uncomfortable seats. Great cabin crew-helpful and pleasant!

Tight fit in middle seat but OK for short flight. Crew was more interested in talking to each other than helping passengers - strickingly dissappointing. DAB is a great airport. New Haven sucks! Excellent value for the .

Avelo is definitely a budget airline and you get what you pay for. The plane was packed and the seats were not particularly comfortable. Staff was very nice and both of our flights were on time. The one thing I wish I had known was that the staff does not show up at the airport desk to check your bags until two hours before the flight. We had a 4:30 flight and had to check out of our hotel at noon. Since we have lounge passes we planned to check our bag, go through security and hang out at the lounge until we had to board. But because we could not check our bag until 2:30, when the staff showed up, we could not go through security and access the lounge. Passengers with boarding passes and carry on luggage would not have this issue. I might fly Avelo again but would only do carry on or plan to get to the airport no sooner than two hours before check in. And I would not recommend a long flight on Avelo since there is no food or entertainment and the seats are not comfortable.

No food or entertainment, but flight very comfortable and on time.

Baggage claim was barbaric at Wilmington. I realize that this is a startup airline but if they hope to grow or even survive they need to upgrade this airport. There is no automated luggage carousel and at times you are not only fighting your fellow passengers to get to your bags but also passengers coming in from other flights who cross right in front of you

No frills, i.e., no drinks or snacks. One is charged for everything. The cost really adds up. The crew and flight attendants were excellent and very pleasant.

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.

My flight was delayed for several hours. Sitting at gate 16 for several hours, I got a text from Kayak the gate changed to 9 before it was announced. Very bad communication at each gate from American Airlines employees. I received 10 notifications of delay from Kayak. My vacation started off horrible! I will write to American Airlines corporate office also.

Delayed flight that lead to a missed connection and a 5-hour trip became a 12-hour flight 🙄

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

Information on your arrival and departure airports