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Cheap flights from Santa Rosa to Los Angeles from $130

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 9/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Santa Rosa to Los Angeles (STS-ONT)

Cheap round-trip flights

American Airlines Logo
1:00 pm - 6:16 pmSTS-ONT
5h 16m1 stop
American Airlines Logo
6:10 am - 12:27 pmONT-STS
6h 17m1 stop
$237American Airlines
Find Deal
Sat, Sep 20 - Mon, Sep 22
American Airlines Logo
1:00 pm - 6:16 pmSTS-ONT
5h 16m1 stop
American Airlines Logo
6:10 am - 12:29 pmONT-STS
6h 19m1 stop
$257American Airlines
Find Deal
Fri, Sep 26 - Sat, Sep 27
American Airlines Logo
4:19 pm - 9:48 pmSTS-ONT
5h 29m1 stop
American Airlines Logo
6:10 am - 12:29 pmONT-STS
6h 19m1 stop
$277American Airlines
Find Deal
Thu, Sep 11 - Tue, Sep 16
American Airlines Logo
1:00 pm - 6:16 pmSTS-ONT
5h 16m1 stop
American Airlines Logo
6:10 am - 12:29 pmONT-STS
6h 19m1 stop
$287American Airlines
Find Deal
Fri, Sep 26 - Mon, Sep 29
American Airlines Logo
1:00 pm - 6:16 pmSTS-ONT
5h 16m1 stop
American Airlines Logo
6:10 am - 12:29 pmONT-STS
6h 19m1 stop
$288American Airlines
Find Deal
Wed, Oct 1 - Sun, Oct 5
Alaska Airlines Logo
7:00 am - 2:12 pmSTS-ONT
7h 12m1 stop
Alaska Airlines Logo
11:39 am - 8:23 pmONT-STS
8h 44m1 stop
$322Alaska Airlines
Find Deal
Tue, Sep 23 - Wed, Oct 1
Alaska Airlines Logo
2:28 pm - 6:47 pmSTS-ONT
28h 19m1 stop
Alaska Airlines Logo
7:47 pm - 1:36 pmONT-STS
17h 49m1 stop
$332Alaska Airlines
Find Deal
Tue, Sep 23 - Mon, Sep 29
Hawaiian Airlines Logo
5:55 pm - 11:54 pmSTS-ONT
5h 59m1 stop
Hawaiian Airlines Logo
10:06 am - 4:14 pmONT-STS
6h 08m1 stop
$382Hawaiian Airlines
Find Deal
Mon, Sep 22 - Sat, Sep 27
Hawaiian Airlines Logo
6:51 pm - 11:51 pmSTS-ONT
5h 00m1 stop
Hawaiian Airlines Logo
11:15 am - 7:13 pmONT-STS
7h 58m1 stop
$492Hawaiian Airlines
Find Deal
Mon, Oct 20 - Wed, Oct 22
Logo
5:55 pm - 2:12 pmSTS-ONT
20h 17m2 stops
Logo
6:00 am - 11:29 amONT-STS
29h 29m2 stops
$590
Find Deal
Wed, Oct 1 - Sun, Oct 5

American Airlines flights from Santa Rosa to Ontario

Our best American Airlines deals on Santa Rosa to Ontario flight tickets
American Airlines
Sep 20
STS1:00 pmSanta Rosa Sonoma County
5h 16m
1 stop
ONT6:16 pmOntario
Sep 22
ONT6:10 amOntario
6h 17m
1 stop
STS12:27 pmSanta Rosa Sonoma County
$237
Find similar
American Airlines
Sep 6
STS1:00 pmSanta Rosa Sonoma County
5h 16m
1 stop
ONT6:16 pmOntario
Sep 15
ONT6:10 amOntario
6h 19m
1 stop
STS12:29 pmSanta Rosa Sonoma County
$238
Find similar
American Airlines
Sep 26
STS1:00 pmSanta Rosa Sonoma County
5h 16m
1 stop
ONT6:16 pmOntario
Sep 27
ONT6:10 amOntario
6h 19m
1 stop
STS12:29 pmSanta Rosa Sonoma County
$257
Find similar

Alaska Airlines flights from Santa Rosa to Ontario

Our best Alaska Airlines deals on Santa Rosa to Ontario flight tickets
Alaska Airlines
Sep 23
STS7:00 amSanta Rosa Sonoma County
7h 12m
1 stop
ONT2:12 pmOntario
Oct 1
ONT11:39 amOntario
8h 44m
1 stop
STS8:23 pmSanta Rosa Sonoma County
$322
Find similar
Alaska Airlines
Sep 23
STS2:28 pmSanta Rosa Sonoma County
28h 19m
1 stop
ONT6:47 pmOntario
Sep 29
ONT7:47 pmOntario
17h 49m
1 stop
STS1:36 pmSanta Rosa Sonoma County
$332
Find similar
Alaska Airlines
Sep 25
STS7:00 amSanta Rosa Sonoma County
17h 03m
1 stop
ONT12:03 amOntario
Sep 30
ONT6:00 amOntario
7h 36m
1 stop
STS1:36 pmSanta Rosa Sonoma County
$342
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 August 28, 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 9/20

1:00 pm-6:16 pm

1 stop5h 16m

Ontario

Mon 9/22

6:10 am-12:27 pm

1 stop6h 17m

$237

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Fri 9/26

1:00 pm-6:16 pm

1 stop5h 16m

Ontario

Sat 9/27

6:10 am-12:29 pm

1 stop6h 19m

$257

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Thu 9/11

4:19 pm-9:48 pm

1 stop5h 29m

Ontario

Tue 9/16

6:10 am-12:29 pm

1 stop6h 19m

$277

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Fri 9/26

1:00 pm-6:16 pm

1 stop5h 16m

Ontario

Mon 9/29

6:10 am-12:29 pm

1 stop6h 19m

$287

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Wed 10/1

1:00 pm-6:16 pm

1 stop5h 16m

Ontario

Sun 10/5

6:10 am-12:29 pm

1 stop6h 19m

$288

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Tue 9/23

7:00 am-2:12 pm

1 stop7h 12m

Ontario

Wed 10/1

11:39 am-8:23 pm

1 stop8h 44m

$322

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Tue 9/23

2:28 pm-6:47 pm

1 stop28h 19m

Ontario

Mon 9/29

7:47 pm-1:36 pm

1 stop17h 49m

$332

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Mon 9/22

5:55 pm-11:54 pm

1 stop5h 59m

Ontario

Sat 9/27

10:06 am-4:14 pm

1 stop6h 08m

$382

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Mon 10/20

6:51 pm-11:51 pm

1 stop5h 00m

Ontario

Wed 10/22

11:15 am-7:13 pm

1 stop7h 58m

$492

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Wed 10/1

5:55 pm-2:12 pm

2 stops20h 17m

Ontario

Sun 10/5

6:00 am-11:29 am

2 stops29h 29m

$590

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest 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 typical price of a round-trip flight between Santa Rosa and Ontario?

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 $108. 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 $159.

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

At noon is the cheapest time of day to fly from Santa Rosa to Ontario when you can find flight prices for as low as $109. Flying to Ontario at noon 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 $163 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

Direct flights

None
There are no direct flights from Santa Rosa to Ontario. There are no popular flight routes from Santa Rosa to Ontario.
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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 4h 56m.

  • 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
78 reviews
Search Avelo Airlines flights
Alaska AirlinesPriceFrom $177Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $222Free CancellationRating
7.2
10,000 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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