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Cheap flights from Ontario to San Francisco from $79

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to San Francisco departing on 6/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Ontario to San Francisco

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
3:35 pm - 5:04 pm
ONT
-
STS
1h 29mnonstop
Alaska Airlines Logo
5:44 pm - 7:08 pm
STS
-
ONT
1h 24mnonstop
$116Alaska Airlines
Sat, May 16 - Tue, May 19
Alaska Airlines Logo
3:35 pm - 5:04 pm
ONT
-
STS
1h 29mnonstop
Alaska Airlines Logo
5:44 pm - 7:08 pm
STS
-
ONT
1h 24mnonstop
$117Alaska Airlines
Sat, May 23 - Tue, May 26
Alaska Airlines Logo
3:35 pm - 5:04 pm
ONT
-
STS
1h 29mnonstop
Alaska Airlines Logo
5:44 pm - 7:08 pm
STS
-
ONT
1h 24mnonstop
$137Alaska Airlines
Wed, May 20 - Sat, May 23
Alaska Airlines Logo
3:35 pm - 5:04 pm
ONT
-
STS
1h 29mnonstop
Alaska Airlines Logo
5:44 pm - 7:08 pm
STS
-
ONT
1h 24mnonstop
$147Alaska Airlines
Mon, Jun 1 - Sat, Jun 6
Alaska Airlines Logo
3:35 pm - 5:04 pm
ONT
-
STS
1h 29mnonstop
Alaska Airlines Logo
5:44 pm - 7:08 pm
STS
-
ONT
1h 24mnonstop
$157Alaska Airlines
Sat, May 23 - Sun, May 24
Alaska Airlines Logo
3:35 pm - 5:04 pm
ONT
-
STS
1h 29mnonstop
Alaska Airlines Logo
4:35 pm - 6:03 pm
STS
-
ONT
1h 28mnonstop
$167Alaska Airlines
Sat, Jun 6 - Wed, Jun 17
Alaska Airlines Logo
3:35 pm - 5:04 pm
ONT
-
STS
1h 29mnonstop
Alaska Airlines Logo
4:35 pm - 6:03 pm
STS
-
ONT
1h 28mnonstop
$177Alaska Airlines
Sat, Jun 6 - Thu, Jun 11
Alaska Airlines Logo
3:35 pm - 5:04 pm
ONT
-
STS
1h 29mnonstop
Alaska Airlines Logo
5:44 pm - 7:08 pm
STS
-
ONT
1h 24mnonstop
$197Alaska Airlines
Fri, May 29 - Sun, May 31
Alaska Airlines Logo
3:35 pm - 5:04 pm
ONT
-
STS
1h 29mnonstop
Alaska Airlines Logo
4:35 pm - 6:03 pm
STS
-
ONT
1h 28mnonstop
$207Alaska Airlines
Sun, Jun 7 - Wed, Jun 17
Alaska Airlines Logo
6:43 pm - 8:14 pm
ONT
-
STS
1h 31mnonstop
Alaska Airlines Logo
4:35 pm - 6:03 pm
STS
-
ONT
1h 28mnonstop
$217Alaska Airlines
Sat, Jun 13 - Sun, Jun 21

Southwest flights from Ontario to Santa Rosa

Our best Southwest deals on Ontario to Santa Rosa flight tickets
Southwest
Jun 2
ONT10:55 amOntario
5h 00m
1 stop
STS3:55 pmSanta Rosa Sonoma County
Jun 5
STS3:55 pmSanta Rosa Sonoma County
4h 15m
1 stop
ONT8:10 pmOntario
$224
Southwest
Jun 2
ONT10:55 amOntario
5h 00m
1 stop
STS3:55 pmSanta Rosa Sonoma County
Jun 5
STS3:55 pmSanta Rosa Sonoma County
6h 20m
2 stops
ONT10:15 pmOntario
$249
Southwest
May 20
ONT3:45 pmOntario
6h 25m
2 stops
STS10:10 pmSanta Rosa Sonoma County
May 26
STS4:35 pmSanta Rosa Sonoma County
5h 40m
1 stop
ONT10:15 pmOntario
$262

Alaska Airlines flights from Ontario to Santa Rosa

Our best Alaska Airlines deals on Ontario to Santa Rosa flight tickets
Alaska Airlines
May 16
ONT3:35 pmOntario
1h 29m
STS5:04 pmSanta Rosa Sonoma County
May 19
STS5:44 pmSanta Rosa Sonoma County
1h 24m
ONT7:08 pmOntario
$116
Alaska Airlines
May 23
ONT3:35 pmOntario
1h 29m
STS5:04 pmSanta Rosa Sonoma County
May 26
STS5:44 pmSanta Rosa Sonoma County
1h 24m
ONT7:08 pmOntario
$117
Alaska Airlines
May 20
ONT3:35 pmOntario
1h 29m
STS5:04 pmSanta Rosa Sonoma County
May 23
STS5:44 pmSanta Rosa Sonoma County
1h 24m
ONT7:08 pmOntario
$137

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Santa Rosa that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated April 30, 2026.
Use the filters below to find and compare flights from Ontario to Santa Rosa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Sat 5/16

3:35 pm-5:04 pm

Nonstop1h 29m

Santa Rosa Sonoma County

Tue 5/19

5:44 pm-7:08 pm

Nonstop1h 24m

$116

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Sat 5/23

3:35 pm-5:04 pm

Nonstop1h 29m

Santa Rosa Sonoma County

Tue 5/26

5:44 pm-7:08 pm

Nonstop1h 24m

$117

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Wed 5/20

3:35 pm-5:04 pm

Nonstop1h 29m

Santa Rosa Sonoma County

Sat 5/23

5:44 pm-7:08 pm

Nonstop1h 24m

$137

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Mon 6/1

3:35 pm-5:04 pm

Nonstop1h 29m

Santa Rosa Sonoma County

Sat 6/6

5:44 pm-7:08 pm

Nonstop1h 24m

$147

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Sat 5/23

3:35 pm-5:04 pm

Nonstop1h 29m

Santa Rosa Sonoma County

Sun 5/24

5:44 pm-7:08 pm

Nonstop1h 24m

$157

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Sat 6/6

3:35 pm-5:04 pm

Nonstop1h 29m

Santa Rosa Sonoma County

Wed 6/17

4:35 pm-6:03 pm

Nonstop1h 28m

$167

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Sat 6/6

3:35 pm-5:04 pm

Nonstop1h 29m

Santa Rosa Sonoma County

Thu 6/11

4:35 pm-6:03 pm

Nonstop1h 28m

$177

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Fri 5/29

3:35 pm-5:04 pm

Nonstop1h 29m

Santa Rosa Sonoma County

Sun 5/31

5:44 pm-7:08 pm

Nonstop1h 24m

$197

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Sun 6/7

3:35 pm-5:04 pm

Nonstop1h 29m

Santa Rosa Sonoma County

Wed 6/17

4:35 pm-6:03 pm

Nonstop1h 28m

$207

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Sat 6/13

6:43 pm-8:14 pm

Nonstop1h 31m

Santa Rosa Sonoma County

Sun 6/21

4:35 pm-6:03 pm

Nonstop1h 28m

$217

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Francisco from

How to get the cheapest flight ticket from Ontario to Santa Rosa

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Ontario and Santa Rosa?

What is the cheapest month to fly to Santa Rosa?

If you are unable to visit Santa Rosa during the month of February, then departing from Ontario during the month November is also very affordable. Most momondo users find prices during this month for around $127.

What is the cheapest day to depart on your flight to Santa Rosa?

Our data shows that Wednesday is the least expensive day to fly to Santa Rosa. Tickets to fly out on this day can be as low as $207. On the other hand, Friday is the most expensive day to depart from Ontario because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $305.

What is the cheapest time of day to depart on your flight to Santa Rosa?

Our data shows that the cheapest Ontario to Santa Rosa flights are usually those with departure times at noon. Our users have found flights to Santa Rosa at noon for as low as $247. Flights in the morning are often more expensive with an average ticket price of $276.

What is the cheapest Ontario to Santa Rosa Sonoma County flight route?

Fly from Ontario to Santa Rosa Sonoma County for the best Ontario - Santa Rosa Sonoma County flight prices

Can stopping save me money on Ontario to Santa Rosa flights?

No. A direct flight is the cheapest option for a flight between Ontario to Santa Rosa.

When to book flights from Ontario to Santa Rosa

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Santa Rosa according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Santa Rosa (ONT to STS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Santa Rosa

Best Price Found

$158

Fastest flight time

1h 29m

Direct flights

Every day

Airports in Santa Rosa

1 airport
The best one-way flight to Santa Rosa from Ontario in the past 72 hours is $158. The best round-trip flight deal from Ontario to Santa Rosa found on momondo in the last 72 hours is $157.
The fastest flight from Ontario to Santa Rosa takes 1h 29m
Direct flights go from Ontario to Santa Rosa every day.
There is 1 airport in Santa Rosa. From Ontario there are direct flights to Santa Rosa Sonoma County (STS).
Search flight deals

Frequently asked questions about flying from Ontario to Santa Rosa

  • How far is Ontario to Santa Rosa Sonoma County by plane?

    There are 413.2 mi between Ontario and Santa Rosa Sonoma County. In terms of flight time, this usually takes a little over 1h 29m.

  • When did momondo last update prices for flights from Ontario Airport to Santa Rosa Sonoma County Airport?

    Prices for flights from Ontario Airport to Santa Rosa Sonoma County Airport are updated daily.

  • How many operators does momondo search for flights from Ontario Airport to Santa Rosa Sonoma County Airport?

  • How old do you have to be to fly from Ontario Airport to Santa Rosa Sonoma County Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario Airport to Santa Rosa Sonoma County Airport.

  • What documentation or ID do you need to fly to Santa Rosa Sonoma County Airport?

    The necessary travel and health documents for your Santa Rosa Sonoma County Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Ontario to Santa Rosa?

  • What is the most popular airline from Ontario to Santa Rosa?

Best airlines flying from Ontario to Santa Rosa

Compare and see reviews for airlines that fly from Ontario to Santa Rosa with momondo
Airline
Rating
Free Cancellation
Price
Alaska AirlinesPriceFrom $117Free CancellationRating
7.9
12,316 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $222Free CancellationRating
7.1
11,682 reviews
Search American Airlines flights

  • Alaska Airlines Flights From Ontario to Santa Rosa

    Alaska Airlines operates around 7 flights from Ontario to Santa Rosa every week. The average price of these flights found in the last 72 hours has been $187, but momondo users have found Alaska Airlines deals from Ontario to Santa Rosa from as low as $117 round-trip. Alaska Airlines has been scored 7.9/10 in 12,316 reviews.

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Fort Bragg
Mendocino
Ukiah
Little River
Point Arena

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Santa Rosa?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to Santa Rosa. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Ontario to Santa Rosa with flexible booking policies on momondo?

All flight searches from Ontario to Santa Rosa on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Ontario to Santa Rosa?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Santa Rosa.

I’m not ready to book a flight from Ontario to Santa Rosa right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Santa Rosa from Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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