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Cheap flights from Santa Rosa to Los Angeles from $99

This is the cheapest one-way 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 3/26. 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 pm
STS
-
ONT
1h 27mnonstop
Alaska Airlines Logo
1:30 pm - 3:01 pm
ONT
-
STS
1h 31mnonstop
$137Alaska Airlines
Wed, Mar 18 - Thu, Apr 2
Alaska Airlines Logo
3:45 pm - 5:12 pm
STS
-
ONT
1h 27mnonstop
Alaska Airlines Logo
1:30 pm - 3:01 pm
ONT
-
STS
1h 31mnonstop
$156Alaska Airlines
Thu, Apr 9 - Mon, Apr 13
Alaska Airlines Logo
3:45 pm - 5:12 pm
STS
-
ONT
1h 27mnonstop
Alaska Airlines Logo
1:30 pm - 3:01 pm
ONT
-
STS
1h 31mnonstop
$157Alaska Airlines
Wed, May 6 - Sun, May 10
American Airlines Logo
4:23 pm - 10:13 pm
STS
-
ONT
5h 50m1 stop
American Airlines Logo
9:59 am - 3:53 pm
ONT
-
STS
5h 54m1 stop
$176American Airlines
Fri, Jan 23 - Fri, Jan 30
Alaska Airlines Logo
3:45 pm - 5:12 pm
STS
-
ONT
1h 27mnonstop
Alaska Airlines Logo
1:30 pm - 3:01 pm
ONT
-
STS
1h 31mnonstop
$187Alaska Airlines
Fri, Mar 20 - Sun, Mar 22
Alaska Airlines Logo
7:57 pm - 11:08 am
STS
-
ONT
15h 11m1 stop
Alaska Airlines Logo
4:22 pm - 6:22 pm
ONT
-
STS
2h 00mnonstop
$190Alaska Airlines
Tue, Mar 10 - Wed, Mar 18
Alaska Airlines Logo
7:57 pm - 11:32 pm
STS
-
ONT
27h 35m1 stop
Alaska Airlines Logo
4:22 pm - 6:22 pm
ONT
-
STS
2h 00mnonstop
$191Alaska Airlines
Sat, Mar 14 - Wed, Mar 18
Alaska Airlines Logo
6:50 pm - 11:52 pm
STS
-
ONT
5h 02m1 stop
Alaska Airlines Logo
4:22 pm - 6:22 pm
ONT
-
STS
2h 00mnonstop
$195Alaska Airlines
Wed, Mar 11 - Wed, Mar 18
Alaska Airlines Logo
3:45 pm - 5:12 pm
STS
-
ONT
1h 27mnonstop
Alaska Airlines Logo
1:30 pm - 3:01 pm
ONT
-
STS
1h 31mnonstop
$197Alaska Airlines
Tue, May 12 - Thu, May 14
Alaska Airlines Logo
9:33 pm - 3:08 pm
STS
-
ONT
17h 35m1 stop
Alaska Airlines Logo
6:00 am - 11:59 pm
ONT
-
STS
17h 59m1 stop
$204Alaska Airlines
Fri, Feb 6 - Mon, Feb 9

Alaska Airlines flights from Santa Rosa to Ontario

Our best Alaska Airlines deals on Santa Rosa to Ontario flight tickets
Alaska Airlines
May 6
STS10:41 amSanta Rosa Sonoma County
1h 27m
ONT12:08 pmOntario
May 10
ONT12:48 pmOntario
1h 32m
STS2:20 pmSanta Rosa Sonoma County
$157
Find similar
Alaska Airlines
Mar 13
STS7:57 pmSanta Rosa Sonoma County
27h 35m
1 stop
ONT11:32 pmOntario
Mar 23
ONT4:22 pmOntario
2h 00m
STS6:22 pmSanta Rosa Sonoma County
$181
Find similar
Alaska Airlines
Mar 26
STS2:12 pmSanta Rosa Sonoma County
1h 30m
ONT3:42 pmOntario
Mar 29
ONT4:28 pmOntario
2h 00m
STS6:28 pmSanta Rosa Sonoma County
$187
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 23
STS4:23 pmSanta Rosa Sonoma County
5h 50m
1 stop
ONT10:13 pmOntario
Jan 30
ONT9:59 amOntario
5h 54m
1 stop
STS3:53 pmSanta Rosa Sonoma County
$176
Find similar
American Airlines
Jan 23
STS4:23 pmSanta Rosa Sonoma County
5h 50m
1 stop
ONT10:13 pmOntario
Jan 26
ONT9:59 amOntario
5h 54m
1 stop
STS3:53 pmSanta Rosa Sonoma County
$217
Find similar
American Airlines
Jan 15
STS4:23 pmSanta Rosa Sonoma County
5h 50m
1 stop
ONT10:13 pmOntario
Jan 19
ONT6:27 amOntario
5h 58m
1 stop
STS12:25 pmSanta Rosa Sonoma County
$236
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 December 21, 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

Wed 3/18

3:45 pm-5:12 pm

Nonstop1h 27m

Ontario

Thu 4/2

1:30 pm-3:01 pm

Nonstop1h 31m

$137

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Thu 4/9

3:45 pm-5:12 pm

Nonstop1h 27m

Ontario

Mon 4/13

1:30 pm-3:01 pm

Nonstop1h 31m

$156

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Wed 5/6

3:45 pm-5:12 pm

Nonstop1h 27m

Ontario

Sun 5/10

1:30 pm-3:01 pm

Nonstop1h 31m

$157

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Fri 1/23

4:23 pm-10:13 pm

1 stop5h 50m

Ontario

Fri 1/30

9:59 am-3:53 pm

1 stop5h 54m

$176

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Fri 3/20

3:45 pm-5:12 pm

Nonstop1h 27m

Ontario

Sun 3/22

1:30 pm-3:01 pm

Nonstop1h 31m

$187

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Tue 3/10

7:57 pm-11:08 am

1 stop15h 11m

Ontario

Wed 3/18

4:22 pm-6:22 pm

Nonstop2h 00m

$190

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Sat 3/14

7:57 pm-11:32 pm

1 stop27h 35m

Ontario

Wed 3/18

4:22 pm-6:22 pm

Nonstop2h 00m

$191

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Wed 3/11

6:50 pm-11:52 pm

1 stop5h 02m

Ontario

Wed 3/18

4:22 pm-6:22 pm

Nonstop2h 00m

$195

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Tue 5/12

3:45 pm-5:12 pm

Nonstop1h 27m

Ontario

Thu 5/14

1:30 pm-3:01 pm

Nonstop1h 31m

$197

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Fri 2/6

9:33 pm-3:08 pm

1 stop17h 35m

Ontario

Mon 2/9

6:00 am-11:59 pm

1 stop17h 59m

$204

Flights are sorted by cheapest round-trip flights first.

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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 $69. If you aren’t able to travel during the month of December, then book flights to Ontario from Santa Rosa during April instead. Flights to Ontario in April, while not as cheap as those in December, still average around $198.

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 $130. 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 $179.

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 $124. 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 at noon when prices are $218 on average. Flights to Ontario from Santa Rosa at noon 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

Best Price Found

$157

Fastest flight time

1h 27m

Direct flights

Mon, Tue, Wed, Thu, Fri and Sat

Airports in Ontario

1 airport
The best flight deal from Santa Rosa to Ontario found on momondo in the last 72 hours is $157
The fastest flight from Santa Rosa to Ontario takes 1h 27m
Direct flights go from Santa Rosa to Ontario on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. There are no airlines offering direct flights.
There is 1 airport in Ontario. From Santa Rosa there are direct flights to Ontario (ONT).
Search flight deals

  • 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 $57Free CancellationRating
7.5
85 reviews
Search Avelo Airlines flights
Alaska AirlinesPriceFrom $117Free CancellationRating
8.0
11,500 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $222Free CancellationRating
7.2
11,052 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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