United States
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ONT - STS

$94 Find Cheap Flights from Ontario to Santa Rosa - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$157
Typical prices: $179-$348
Alaska Airlines
Sun 10/21Wed 10/24
ONT - STS • Non-stop
Cheapest one-way
$94
Typical prices: $118-$188
Southwest
Sun 10/21
ONT - STS • 2 stops
Nonstop flights
Not available
There are currently no direct flights between Ontario and Santa Rosa. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
April
Cheapest • 26% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Las Vegas Harry Reid Intl (LAS)
Cheapest • Avg $282 (round-trip)
Portland (PDX)
Shortest trip • 5h 18m (one-way)
Insights
Insights
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We hope you love your trip to Santa Rosa!
Flight Deals
Booking Insights
Flight Deals

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

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

Recent round-trip flight deals from Ontario to Santa Rosa

Sat, Oct 24 - Mon, Oct 26
Alaska Airlines Logo
5:45 pm - 7:25 pmONT  Ontario-STS Santa Rosa Sonoma County
1h 40mnonstop
Alaska Airlines Logo
3:32 pm - 5:05 pmSTS  Santa Rosa Sonoma County-ONT Ontario
1h 33mnonstop
$157Alaska Airlines
Thu, Oct 22 - Sat, Oct 24
Alaska Airlines Logo
5:45 pm - 7:25 pmONT  Ontario-STS Santa Rosa Sonoma County
1h 40mnonstop
Alaska Airlines Logo
3:32 pm - 5:05 pmSTS  Santa Rosa Sonoma County-ONT Ontario
1h 33mnonstop
$157Alaska Airlines
Fri, Oct 23 - Mon, Oct 26
Alaska Airlines Logo
5:45 pm - 7:25 pmONT  Ontario-STS Santa Rosa Sonoma County
1h 40mnonstop
Alaska Airlines Logo
3:32 pm - 5:05 pmSTS  Santa Rosa Sonoma County-ONT Ontario
1h 33mnonstop
$157Alaska Airlines
Thu, Oct 22 - Mon, Oct 26
Alaska Airlines Logo
5:45 pm - 7:25 pmONT  Ontario-STS Santa Rosa Sonoma County
1h 40mnonstop
Alaska Airlines Logo
3:32 pm - 5:05 pmSTS  Santa Rosa Sonoma County-ONT Ontario
1h 33mnonstop
$157Alaska Airlines
Sat, Oct 24 - Sat, Oct 31
Alaska Airlines Logo
5:45 pm - 7:25 pmONT  Ontario-STS Santa Rosa Sonoma County
1h 40mnonstop
Alaska Airlines Logo
3:32 pm - 5:05 pmSTS  Santa Rosa Sonoma County-ONT Ontario
1h 33mnonstop
$157Alaska Airlines
Sat, Oct 24 - Mon, Oct 26
Alaska Airlines Logo
5:45 pm - 7:25 pmONT  Ontario-STS Santa Rosa Sonoma County
1h 40mnonstop
Alaska Airlines Logo
3:32 pm - 5:05 pmSTS  Santa Rosa Sonoma County-ONT Ontario
1h 33mnonstop
$157Alaska Airlines
Wed, Oct 21 - Sat, Oct 24
Alaska Airlines Logo
5:45 pm - 7:25 pmONT  Ontario-STS Santa Rosa Sonoma County
1h 40mnonstop
Alaska Airlines Logo
3:32 pm - 5:05 pmSTS  Santa Rosa Sonoma County-ONT Ontario
1h 33mnonstop
$157Alaska Airlines
Fri, Oct 23 - Sat, Oct 24
Alaska Airlines Logo
5:45 pm - 7:25 pmONT  Ontario-STS Santa Rosa Sonoma County
1h 40mnonstop
Alaska Airlines Logo
3:32 pm - 5:05 pmSTS  Santa Rosa Sonoma County-ONT Ontario
1h 33mnonstop
$157Alaska Airlines
Thu, Oct 22 - Sat, Oct 24
Delta Logo
6:00 am - 10:41 amONT  Ontario-STS Santa Rosa Sonoma County
4h 41m1 stop Salt Lake City
Delta Logo
11:21 am - 4:23 pmSTS  Santa Rosa Sonoma County-ONT Ontario
5h 02m1 stop Salt Lake City
$177Delta
Sat, Oct 24 - Sat, Oct 31
Delta Logo
6:00 am - 10:41 amONT  Ontario-STS Santa Rosa Sonoma County
4h 41m1 stop Salt Lake City
Delta Logo
4:49 pm - 10:12 pmSTS  Santa Rosa Sonoma County-ONT Ontario
5h 23m1 stop Salt Lake City
$177Delta
Booking Insights

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

Round-trip flights from Ontario to Santa Rosa typically range from $179 to $348. 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 Ontario to Santa Rosa?

Based on deals KAYAK users found in the last 12 months, Tuesday is the cheapest day of the week to fly from Ontario to Santa Rosa. It’s 31% cheaper than the average day, while Sunday is the most expensive, with prices 44% higher.

Find deals

Key details for Ontario to Santa Rosa flights

Low season

January

Cheapest flight

$94
Beat the crowds with an average 78% drop in travelers.
The most popular month to fly with an average 106% increase in travelers.
One-way 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

Your Ontario to Santa Rosa 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 Ontario to Santa Rosa?

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

    • Earliest: departs at 4:27 pm and lands at 6:07 pm
    • Latest: departs at 5:45 pm and lands at 7:25 pm.

    The flight takes about 1h 40m.

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

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

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

    A nonstop flight from Ontario to Santa Rosa takes 1h 40m, covering 423 miles.

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

    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 Ontario to Santa Rosa flight?

    Round-trip flights from Ontario to Santa Rosa range from $179 to $348, with an average of $240 over the past 12 months. Anything below $179 counts as a good deal.

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

    On this route, nonstop flights are cheaper than layover options on average. Nonstop fares average $227 round-trip, compared to $282 via a layover through Las Vegas Harry Reid Intl (LAS).

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

    The Airbus A321neo family is used most often on this route, operated mainly by Frontier and Delta. Other aircraft seen on the route include Boeing 737-800 Passenger/BBJ2 (winglets) variants.

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

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

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

    One-way fares from Ontario to Santa Rosa are currently lower than usual. Average one-way flight prices are about $106, which is 26% below the typical average for this route.

  • What car rental options are available at Santa Rosa Sonoma County Airport (STS)?

    Santa Rosa Sonoma County Airport (STS) hosts 5 major car rental companies, with daily rates starting from around $24 for economy cars. Top options include:

    • Ace
    • Dollar
    • Enterprise Rent-A-Car
    • Hertz
    • Budget

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

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

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

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

    • Phoenix Sky Harbor Intl (PHX) - 69% of one-stop connections
    • Portland (PDX) - 19% of one-stop connections
    • Las Vegas Harry Reid Intl (LAS) - 13% of one-stop connections

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

    Yes. Flexible dates can save you up to 52% on flights from Ontario to Santa Rosa. Tuesday is the cheapest departure day at $167 round-trip on average, while Sunday is the most expensive at $347, a difference of $180.

    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 Ontario to Santa Rosa?

    Only Alaska Airlines operates flights between Ontario and Santa Rosa.

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

    Flying via Las Vegas Harry Reid Intl (LAS) gives the shortest average 1-stop total travel time at 4h 52m, compared with 5h 18m via Portland (PDX) and 5h 41m via Phoenix Sky Harbor Intl (PHX).

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

    Among airlines operating Ontario to Santa Rosa 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 Ontario to Santa Rosa 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 Ontario to Santa Rosa 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 $167, about $180 less than Sunday fares (52% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Ontario to Santa Rosa trip for April. Fares historically average $177 round-trip in that month - typically $394 less than the most expensive month, which is December (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Santa Rosa Sonoma County Airport.

    • Hilton Garden Inn Sonoma County Airport

More options for your flight from Ontario to Santa Rosa

Complete your trip to Santa Rosa with a hotel stay or car rental

Car rentals in Santa Rosa
Hotels in Santa Rosa
Vacations in Santa Rosa