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Cheap flights from Santa Rosa to Los Angeles from $113

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Santa Rosa to Los Angeles departing on 4/4. 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 Santa Rosa to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
3:45 pm - 5:12 pmSTS-ONT
1h 27mnonstop
Alaska Airlines Logo
1:30 pm - 3:01 pmONT-STS
1h 31mnonstop
$113Alaska Airlines
Find Deal
Sat, Apr 4 - Sat, Apr 11
Alaska Airlines Logo
3:45 pm - 5:12 pmSTS-ONT
1h 27mnonstop
Alaska Airlines Logo
1:30 pm - 3:01 pmONT-STS
1h 31mnonstop
$116Alaska Airlines
Find Deal
Sat, Mar 28 - Wed, Apr 1
Alaska Airlines Logo
3:45 pm - 5:12 pmSTS-ONT
1h 27mnonstop
Alaska Airlines Logo
1:30 pm - 3:01 pmONT-STS
1h 31mnonstop
$117Alaska Airlines
Find Deal
Sat, Apr 4 - Sat, Apr 11
Alaska Airlines Logo
3:45 pm - 5:12 pmSTS-ONT
1h 27mnonstop
Alaska Airlines Logo
1:30 pm - 3:01 pmONT-STS
1h 31mnonstop
$137Alaska Airlines
Find Deal
Sat, Apr 18 - Sat, Apr 25
Alaska Airlines Logo
3:45 pm - 5:12 pmSTS-ONT
1h 27mnonstop
Alaska Airlines Logo
1:30 pm - 3:01 pmONT-STS
1h 31mnonstop
$157Alaska Airlines
Find Deal
Fri, Mar 27 - Sun, Mar 29
American Airlines Logo
4:23 pm - 10:13 pmSTS-ONT
5h 50m1 stop
American Airlines Logo
6:22 am - 12:25 pmONT-STS
6h 03m1 stop
$237American Airlines
Find Deal
Fri, Jan 9 - Sun, Jan 11
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
$255American 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
9:59 am - 3:56 pmONT-STS
5h 57m1 stop
$257American Airlines
Find Deal
Sat, Dec 6 - Mon, Dec 15
American Airlines Logo
4:26 pm - 10:00 pmSTS-ONT
5h 34m1 stop
American Airlines Logo
9:59 am - 3:56 pmONT-STS
5h 57m1 stop
$258American Airlines
Find Deal
Thu, Dec 11 - Mon, Dec 15
Hawaiian Airlines Logo
2:21 pm - 11:29 pmSTS-ONT
9h 08m1 stop
Hawaiian Airlines Logo
12:13 pm - 9:52 pmONT-STS
9h 39m1 stop
$314Hawaiian Airlines
Find Deal
Thu, Dec 4 - Mon, Dec 8

Alaska Airlines flights from Santa Rosa to Ontario

Our best Alaska Airlines deals on Santa Rosa to Ontario flight tickets
Alaska Airlines
Apr 4
STS3:45 pmSanta Rosa Sonoma County
1h 27m
ONT5:12 pmOntario
Apr 11
ONT1:30 pmOntario
1h 31m
STS3:01 pmSanta Rosa Sonoma County
$113
Find similar
Alaska Airlines
Mar 28
STS3:45 pmSanta Rosa Sonoma County
1h 27m
ONT5:12 pmOntario
Apr 1
ONT1:30 pmOntario
1h 31m
STS3:01 pmSanta Rosa Sonoma County
$116
Find similar
Alaska Airlines
Apr 4
STS3:45 pmSanta Rosa Sonoma County
1h 27m
ONT5:12 pmOntario
Apr 11
ONT1:30 pmOntario
1h 31m
STS3:01 pmSanta Rosa Sonoma County
$117
Find similar

American Airlines flights from Santa Rosa to Ontario

Our best American Airlines deals on Santa Rosa to Ontario flight tickets
American Airlines
Jan 9
STS4:23 pmSanta Rosa Sonoma County
5h 50m
1 stop
ONT10:13 pmOntario
Jan 11
ONT6:22 amOntario
6h 03m
1 stop
STS12:25 pmSanta Rosa Sonoma County
$237
Find similar
American Airlines
Dec 4
STS12:57 pmSanta Rosa Sonoma County
5h 22m
1 stop
ONT6:19 pmOntario
Dec 8
ONT9:59 amOntario
5h 57m
1 stop
STS3:56 pmSanta Rosa Sonoma County
$255
Find similar
American Airlines
Dec 6
STS12:57 pmSanta Rosa Sonoma County
5h 22m
1 stop
ONT6:19 pmOntario
Dec 15
ONT9:59 amOntario
5h 57m
1 stop
STS3:56 pmSanta Rosa Sonoma County
$257
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Santa Rosa to Ontario 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 November 4, 2025.
Use the filters below to find and compare flights from Santa Rosa to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Sat 4/4

3:45 pm-5:12 pm

Nonstop1h 27m

Ontario

Sat 4/11

1:30 pm-3:01 pm

Nonstop1h 31m

$113

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Sat 3/28

3:45 pm-5:12 pm

Nonstop1h 27m

Ontario

Wed 4/1

1:30 pm-3:01 pm

Nonstop1h 31m

$116

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Sat 4/4

3:45 pm-5:12 pm

Nonstop1h 27m

Ontario

Sat 4/11

1:30 pm-3:01 pm

Nonstop1h 31m

$117

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Sat 4/18

3:45 pm-5:12 pm

Nonstop1h 27m

Ontario

Sat 4/25

1:30 pm-3:01 pm

Nonstop1h 31m

$137

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Fri 3/27

3:45 pm-5:12 pm

Nonstop1h 27m

Ontario

Sun 3/29

1:30 pm-3:01 pm

Nonstop1h 31m

$157

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Fri 1/9

4:23 pm-10:13 pm

1 stop5h 50m

Ontario

Sun 1/11

6:22 am-12:25 pm

1 stop6h 03m

$237

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Thu 12/4

12:57 pm-6:19 pm

1 stop5h 22m

Ontario

Mon 12/8

9:59 am-3:56 pm

1 stop5h 57m

$255

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Sat 12/6

12:57 pm-6:19 pm

1 stop5h 22m

Ontario

Mon 12/15

9:59 am-3:56 pm

1 stop5h 57m

$257

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Thu 12/11

4:26 pm-10:00 pm

1 stop5h 34m

Ontario

Mon 12/15

9:59 am-3:56 pm

1 stop5h 57m

$258

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Thu 12/4

2:21 pm-11:29 pm

1 stop9h 08m

Ontario

Mon 12/8

12:13 pm-9:52 pm

1 stop9h 39m

$314

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

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 cheapest month to fly to Ontario?

In general, December is the cheapest month to fly from Santa Rosa to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $73. If you aren’t able to travel during the month of December, then book flights to Ontario from Santa Rosa during October instead. Flights to Ontario in October, while not as cheap as those in December, still average around $82.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Monday when prices can be found for as low as $124. This is often the case because there is less demand to fly during this day of the week. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from Santa Rosa to Ontario for around $181.

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

In the evening is the cheapest time of day to fly from Santa Rosa to Ontario when you can find flight prices for as low as $117. Flying to Ontario in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $197 on average. Flights to Ontario from Santa Rosa in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

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

What cabin class options are available on Santa Rosa Sonoma County to Ontario flights?

There is only 1 cabin class available to choose from on Santa Rosa Sonoma County to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

When to book flights from Santa Rosa to Ontario

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

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

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

Fastest flight time

1h 27m

Direct flights

Tue, Sat and Sun

Airports in Ontario

1 airport
The fastest flight from Santa Rosa to Ontario takes 1h 27m
Direct flights go from Santa Rosa to Ontario on Tuesday, Saturday and Sunday. There are no airlines offering direct flights.
There is 1 airport near Ontario: Ontario (ONT)
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  • How far is Santa Rosa Sonoma County to Ontario by plane?

    The straight-line distance from Santa Rosa Sonoma County to Ontario is 413.2 mi. In terms of flight time, this usually takes a little over 1h 27m.

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

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

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Santa Rosa Sonoma County Airport to Ontario Airport.

  • What documentation or ID do you need to fly to Ontario Airport?

    The travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

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

Best airlines flying from Santa Rosa to Ontario

Compare and see reviews for airlines that fly from Santa Rosa to Ontario with momondo
Airline
Rating
Free Cancellation
Price
Avelo AirlinesPriceFrom $55Free CancellationRating
7.5
82 reviews
Search Avelo Airlines flights
Alaska AirlinesPriceFrom $157Free CancellationRating
8.0
11,241 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $222Free CancellationRating
7.2
11,040 reviews
Search American Airlines flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Santa Rosa to Ontario. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for Santa Rosa to Ontario flights to just show those with flexible booking policies.

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

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 Santa Rosa to Ontario.

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

Yes. momondo can track prices for Santa Rosa to Ontario flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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