United States
USD

STS - ONT

$89 Find Cheap Flights from Santa Rosa to Ontario - Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest round-trip
$157
Typical prices: $189-$337
Alaska Airlines
Tue 10/23Fri 10/26
STS - ONT • Non-stop
Cheapest one-way
$89
Typical prices: $128-$258
American Airlines
Sat 12/1
STS - ONT • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Santa Rosa and Ontario. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
19 weeks
in advance
Our data shows that travelers who book at least 19 weeks in advance save around 72% compared to booking last minute.
Insights
Insights
When to travel
April
Cheapest • 20% price drop
May
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Seattle/Tacoma Intl (SEA)
Cheapest • Avg $254 (round-trip)
Las Vegas Harry Reid Intl (LAS)
Shortest trip • 4h 57m (one-way)
Insights
Insights
Start a new search
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)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Santa Rosa to Ontario

Fri, Oct 23 - Mon, Oct 26
Alaska Airlines Logo
3:32 pm - 5:05 pmSTS  Santa Rosa Sonoma County-ONT Ontario
1h 33mnonstop
Alaska Airlines Logo
5:45 pm - 7:25 pmONT  Ontario-STS Santa Rosa Sonoma County
1h 40mnonstop
$157Alaska Airlines
Wed, Oct 21 - Sat, Oct 24
Alaska Airlines Logo
3:32 pm - 5:05 pmSTS  Santa Rosa Sonoma County-ONT Ontario
1h 33mnonstop
Alaska Airlines Logo
5:45 pm - 7:25 pmONT  Ontario-STS Santa Rosa Sonoma County
1h 40mnonstop
$157Alaska Airlines
Sat, Oct 24 - Mon, Oct 26
Alaska Airlines Logo
3:32 pm - 5:05 pmSTS  Santa Rosa Sonoma County-ONT Ontario
1h 33mnonstop
Alaska Airlines Logo
5:45 pm - 7:25 pmONT  Ontario-STS Santa Rosa Sonoma County
1h 40mnonstop
$157Alaska Airlines
Fri, Oct 23 - Sat, Oct 24
Alaska Airlines Logo
3:32 pm - 5:05 pmSTS  Santa Rosa Sonoma County-ONT Ontario
1h 33mnonstop
Alaska Airlines Logo
5:45 pm - 7:25 pmONT  Ontario-STS Santa Rosa Sonoma County
1h 40mnonstop
$157Alaska Airlines
Fri, Oct 23 - Fri, Oct 30
Alaska Airlines Logo
3:32 pm - 5:05 pmSTS  Santa Rosa Sonoma County-ONT Ontario
1h 33mnonstop
Alaska Airlines Logo
5:45 pm - 7:25 pmONT  Ontario-STS Santa Rosa Sonoma County
1h 40mnonstop
$157Alaska Airlines
Thu, Oct 22 - Sat, Oct 24
Alaska Airlines Logo
3:32 pm - 5:05 pmSTS  Santa Rosa Sonoma County-ONT Ontario
1h 33mnonstop
Alaska Airlines Logo
5:45 pm - 7:25 pmONT  Ontario-STS Santa Rosa Sonoma County
1h 40mnonstop
$157Alaska Airlines
Fri, Oct 23 - Tue, Oct 27
Alaska Airlines Logo
3:32 pm - 5:05 pmSTS  Santa Rosa Sonoma County-ONT Ontario
1h 33mnonstop
Alaska Airlines Logo
5:45 pm - 7:25 pmONT  Ontario-STS Santa Rosa Sonoma County
1h 40mnonstop
$157Alaska Airlines
Fri, Oct 23 - Mon, Oct 26
Alaska Airlines Logo
3:32 pm - 5:05 pmSTS  Santa Rosa Sonoma County-ONT Ontario
1h 33mnonstop
Alaska Airlines Logo
5:45 pm - 7:25 pmONT  Ontario-STS Santa Rosa Sonoma County
1h 40mnonstop
$157Alaska Airlines
Sat, Oct 24 - Sun, Oct 25
Delta Logo
11:21 am - 4:23 pmSTS  Santa Rosa Sonoma County-ONT Ontario
5h 02m1 stop Salt Lake City
Delta Logo
6:00 am - 10:41 amONT  Ontario-STS Santa Rosa Sonoma County
4h 41m1 stop Salt Lake City
$177Delta
Fri, Oct 30 - Sat, Oct 31
Delta Logo
4:49 pm - 11:55 pmSTS  Santa Rosa Sonoma County-ONT Ontario
7h 06m1 stop Salt Lake City
Delta Logo
6:00 am - 10:41 amONT  Ontario-STS Santa Rosa Sonoma County
4h 41m1 stop Salt Lake City
$177Delta
Booking Insights

Price, demand and travel trends for Santa Rosa to Ontario flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

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

Round-trip flights from Santa Rosa to Ontario typically range from $189 to $337. The lowest price found in the past 5 days was $157, on Alaska Airlines.

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

Based on deals KAYAK users found in the last 12 months, Tuesday is the cheapest day of the week to fly from Santa Rosa to Ontario. It’s 8% cheaper than the average day, while Sunday is the most expensive, with prices 60% higher.

What’s the cheapest month to fly from Santa Rosa to Ontario?

•April and September are the cheapest months to fly from Santa Rosa to Ontario at $197 round-trip.
•October ($756) and November ($652) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 283% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Santa Rosa to Ontario the cheapest?

Flights from Santa Rosa to Ontario are cheapest 19 weeks before departure. Booking in this window typically costs about 72% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Find deals

Key details for Santa Rosa to Ontario flights

Low season

January

Cheapest flight

$89
Beat the crowds with an average 83% drop in travelers.
The most popular month to fly with an average 82% increase in travelers.
One-way 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

Your Santa Rosa to Ontario flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What are the earliest and latest flights from Santa Rosa to Ontario?

    These are the earliest and latest flight times available from Santa Rosa to Ontario:

    • Earliest: departs at 3:32 pm and lands at 5:05 pm
    • Latest: departs at 3:32 pm and lands at 5:05 pm.

    The flight takes about 1h 33m.

  • What cabin classes can I book on flights from Santa Rosa to Ontario?

    Only Economy Class is available on flights from Santa Rosa to Ontario.

  • How long is a flight from Santa Rosa to Ontario?

    A nonstop flight from Santa Rosa to Ontario takes 1h 33m, covering 423 miles.

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

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

  • How much should I expect to pay for a Santa Rosa to Ontario flight?

    Round-trip flights from Santa Rosa to Ontario range from $189 to $337, with an average of $246 over the past 12 months. Anything below $189 counts as a good deal.

  • How expensive are last-minute Santa Rosa to Ontario flights?

    Last-minute fares on this route (booked within two weeks of departure) run 67% above the $246 route average. Book 19 weeks before departure for the lowest fares.

  • How much can I save by taking a layover when flying from Santa Rosa to Ontario?

    On this route, nonstop flights are cheaper than layover options on average. Nonstop fares average $230 round-trip, compared to $254 via a layover through Seattle/Tacoma Intl (SEA).

  • Which aircraft model is used most often on flights from Santa Rosa to Ontario?

    The Embraer 175 family is used most often on this route, operated mainly by Alaska Airlines. Other aircraft seen on the route include Airbus A321neo variants.

  • Which airlines offer Wi-Fi on Santa Rosa to Ontario flights?

    Alaska Airlines is the only airline on the Santa Rosa to Ontario route offering in-flight Wi-Fi. Pricing depends on fare class.

  • How are flight prices from Santa Rosa to Ontario looking right now?

    One-way fares from Santa Rosa to Ontario are currently lower than usual. Average one-way flight prices are about $104, which is 35% below the typical average for this route.

  • What car rental options are available at Ontario Airport (ONT)?

    Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates starting from around $18 for economy cars. Top options include:

    • Fox
    • Thrifty
    • Europcar
    • Dollar
    • Alamo

  • Which airports can I use when flying from Santa Rosa to Ontario?

    Flights from Santa Rosa to Ontario usually depart from Santa Rosa Sonoma County (STS) and arrive at Ontario (ONT).

  • Which airports do connecting flights from Santa Rosa to Ontario pass through?

    One-stop flights from Santa Rosa to Ontario most commonly connect through:

    • Phoenix Sky Harbor Intl (PHX) - 80% of one-stop connections
    • Las Vegas Harry Reid Intl (LAS) - 13% of one-stop connections
    • Seattle/Tacoma Intl (SEA) - 7% of one-stop connections

  • Can I save money by using flexible dates for flights from Santa Rosa to Ontario?

    Yes. Flexible dates can save you up to 43% on flights from Santa Rosa to Ontario. Tuesday is the cheapest departure day at $227 round-trip on average, while Sunday is the most expensive at $396, a difference of $169.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What airlines fly from Santa Rosa to Ontario?

    Only Alaska Airlines operates flights between Santa Rosa and Ontario.

  • How much time can I save by choosing a different layover airport from Santa Rosa to Ontario?

    Flying via Las Vegas Harry Reid Intl (LAS) gives the shortest average 1-stop total travel time at 4h 57m, compared with 6h 23m via Phoenix Sky Harbor Intl (PHX) and 20h 43m via Seattle/Tacoma Intl (SEA).

  • What popular places can I visit in Ontario?

    Some of the most popular sights in Ontario are Ontario Convention Center and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.

  • Which airlines offer extra legroom and free seat selection on Santa Rosa to Ontario flights?

    Among airlines operating Santa Rosa to Ontario flights:

    • Alaska Airlines: offers extra legroom; offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines include bags at no extra cost on Santa Rosa to Ontario flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Alaska Airlines: a cabin bag and a checked bag in Economy Class

    Bag allowance can vary by ticket type, cabin class, route and airline, so always check the fare details before booking.

Your guide to booking Santa Rosa to Ontario flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Tuesday departure and avoid flying on Sunday. On this route, Tuesday flights average $227, about $169 less than Sunday fares (43% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 19 weeks before you fly. On this route, that window historically saves about 72% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Santa Rosa to Ontario trip for April. Fares historically average $197 round-trip in that month - typically $559 less than the most expensive month, which is October (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Ontario Airport.

    • Azure Hotel & Suites, Trademark Collection by Wyndham
    • La Quinta Inn & Suites by Wyndham Ontario Airport
    • Ontario Airport Inn

More options for your flight from Santa Rosa to Ontario

Complete your trip to Ontario with a hotel stay or car rental

Car rentals in Ontario
Hotels in Ontario
Vacations in Ontario