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Cheap flights from San Francisco Bay Area to Los Angeles from $44

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco Bay Area to Los Angeles departing on 1/5. 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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Frontier Logo
10:44 pm - 12:12 am
SFO
-
ONT
1h 28mnonstop
Frontier Logo
3:07 pm - 10:38 am
ONT
-
SFO
19h 31m1 stop
$109Frontier
Mon, Jan 5 - Wed, Jan 21
Frontier Logo
10:44 pm - 12:12 am
SFO
-
ONT
1h 28mnonstop
Frontier Logo
2:34 pm - 7:12 pm
ONT
-
SFO
4h 38m1 stop
$115Frontier
Mon, Jan 5 - Thu, Jan 15
Frontier Logo
10:44 pm - 12:12 am
SFO
-
ONT
1h 28mnonstop
Frontier Logo
7:00 am - 5:59 pm
ONT
-
SFO
10h 59m1 stop
$118Frontier
Mon, Jan 5 - Wed, Jan 7
Frontier Logo
10:44 pm - 12:12 am
SFO
-
ONT
1h 28mnonstop
Frontier Logo
6:39 pm - 8:16 pm
ONT
-
SFO
1h 37mnonstop
$119Frontier
Mon, Jan 5 - Fri, Jan 16
Frontier Logo
7:15 pm - 1:11 pm
SFO
-
ONT
17h 56m1 stop
Frontier Logo
7:30 am - 10:01 pm
ONT
-
SFO
14h 31m1 stop
$122Frontier
Wed, Feb 18 - Tue, Feb 24
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
Tue, Mar 31 - Tue, Apr 7
American Airlines Logo
12:55 pm - 6:20 pm
STS
-
ONT
5h 25m1 stop
American Airlines Logo
9:59 am - 3:53 pm
ONT
-
STS
5h 54m1 stop
$176American Airlines
Tue, Jan 13 - Tue, Jan 20
Southwest Logo
8:20 am - 9:35 am
SJC
-
ONT
1h 15mnonstop
Southwest Logo
10:40 am - 3:55 pm
ONT
-
SJC
5h 15m1 stop
$183Southwest
Tue, Jan 13 - Tue, Jan 13
Southwest Logo
8:20 am - 9:35 am
SJC
-
ONT
1h 15mnonstop
Southwest Logo
3:25 pm - 9:55 pm
ONT
-
SJC
6h 30m2 stops
$188Southwest
Tue, Jan 13 - Tue, Jan 13

Frontier flights from San Francisco Bay Area to Ontario

Our best Frontier deals on San Francisco Bay Area to Ontario flight tickets
Frontier
Jan 5
SFO10:44 pmSan Francisco
1h 28m
ONT12:12 amOntario
Jan 15
ONT2:34 pmOntario
4h 38m
1 stop
SFO7:12 pmSan Francisco
$115
Find similar
Frontier
Jan 5
SFO10:44 pmSan Francisco
1h 28m
ONT12:12 amOntario
Jan 7
ONT7:00 amOntario
10h 59m
1 stop
SFO5:59 pmSan Francisco
$118
Find similar
Frontier
Jan 5
SFO10:44 pmSan Francisco
1h 28m
ONT12:12 amOntario
Jan 15
ONT6:39 pmOntario
1h 37m
SFO8:16 pmSan Francisco
$119
Find similar

American Airlines flights from San Francisco Bay Area to Ontario

Our best American Airlines deals on San Francisco Bay Area to Ontario flight tickets
American Airlines
Jan 13
STS12:55 pmSanta Rosa Sonoma County
5h 25m
1 stop
ONT6:20 pmOntario
Jan 20
ONT9:59 amOntario
5h 54m
1 stop
STS3:53 pmSanta Rosa Sonoma County
$176
Find similar
American Airlines
Jan 22
STS12:55 pmSanta Rosa Sonoma County
5h 25m
1 stop
ONT6:20 pmOntario
Jan 25
ONT9:59 amOntario
5h 54m
1 stop
STS3:53 pmSanta Rosa Sonoma County
$216
Find similar
American Airlines
Jan 2
STS4:21 pmSanta Rosa Sonoma County
5h 31m
1 stop
ONT9:52 pmOntario
Jan 6
ONT9:59 amOntario
5h 54m
1 stop
STS3:53 pmSanta Rosa Sonoma County
$236
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from San Francisco Bay Area 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 18, 2025.
Use the filters below to find and compare flights from San Francisco Bay Area to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoOntario

SFO - ONT

SFOONT

San Francisco

Mon 1/5

10:44 pm-12:12 am

Nonstop1h 28m

Ontario

Wed 1/21

3:07 pm-10:38 am

1 stop19h 31m

$109

San FranciscoOntario

SFO - ONT

SFOONT

San Francisco

Mon 1/5

10:44 pm-12:12 am

Nonstop1h 28m

Ontario

Thu 1/15

2:34 pm-7:12 pm

1 stop4h 38m

$115

San FranciscoOntario

SFO - ONT

SFOONT

San Francisco

Mon 1/5

10:44 pm-12:12 am

Nonstop1h 28m

Ontario

Wed 1/7

7:00 am-5:59 pm

1 stop10h 59m

$118

San FranciscoOntario

SFO - ONT

SFOONT

San Francisco

Mon 1/5

10:44 pm-12:12 am

Nonstop1h 28m

Ontario

Fri 1/16

6:39 pm-8:16 pm

Nonstop1h 37m

$119

San FranciscoOntario

SFO - ONT

SFOONT

San Francisco

Wed 2/18

7:15 pm-1:11 pm

1 stop17h 56m

Ontario

Tue 2/24

7:30 am-10:01 pm

1 stop14h 31m

$122

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

Tue 3/31

3:45 pm-5:12 pm

Nonstop1h 27m

Ontario

Tue 4/7

1:30 pm-3:01 pm

Nonstop1h 31m

$156

Santa RosaOntario

STS - ONT

STSONT

Santa Rosa Sonoma County

Tue 1/13

12:55 pm-6:20 pm

1 stop5h 25m

Ontario

Tue 1/20

9:59 am-3:53 pm

1 stop5h 54m

$176

San JoseOntario

SJC - ONT

SJCONT

San Jose

Tue 1/13

8:20 am-9:35 am

Nonstop1h 15m

Ontario

Tue 1/13

10:40 am-3:55 pm

1 stop5h 15m

$183

San JoseOntario

SJC - ONT

SJCONT

San Jose

Tue 1/13

8:20 am-9:35 am

Nonstop1h 15m

Ontario

Tue 1/13

3:25 pm-9:55 pm

2 stops6h 30m

$188

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 San Francisco Bay Area 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, February is the cheapest month to fly from San Francisco Bay Area to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $105. If you aren’t able to travel during the month of February, then book flights to Ontario from San Francisco Bay Area during January instead. Flights to Ontario in January, while not as cheap as those in February, still average around $117.

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 $132. 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 San Francisco Bay Area to Ontario for around $178.

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 San Francisco Bay Area to Ontario when you can find flight prices for as low as $123. 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 San Francisco Bay Area at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest San Francisco Bay Area to Ontario flight route?

Fly from San Francisco to Ontario for the best San Francisco Bay Area - Ontario flight prices

How far in advance should I book a flight to Ontario?

You are more likely to see cheaper flights to Ontario from San Francisco Bay Area when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $160 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from San Francisco Bay Area for as low as $100 on momondo.

What cabin class options are available on San Francisco Bay Area to Ontario flights?

There are 4 cabin classes available to choose from on San Francisco Bay Area to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on San Francisco Bay Area to Ontario flights?

No. A direct flight is the cheapest option for a flight between San Francisco Bay Area to Ontario.

Cheap San Francisco Bay Area to Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco Bay Area to Ontario

Fastest flight time

1h 15m

Direct flights

Every day

Airports in Ontario

1 airport
The fastest flight from San Francisco Bay Area to Ontario takes 1h 15m
Direct flights go from San Francisco Bay Area to Ontario every day.
There is 1 airport in Ontario. From San Francisco Bay Area there are direct flights to Ontario (ONT).
Search flight deals

  • When did momondo last update prices for flights from San Francisco Bay Area to Ontario Airport?

    Prices for flights from San Francisco Bay Area to Ontario Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from San Francisco Bay Area to Ontario Airport?

  • How old do you have to be to fly from San Francisco Bay Area to Ontario 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 San Francisco Bay Area to Ontario Airport.

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

    The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from San Francisco Bay Area to Ontario?

Best airlines flying from San Francisco Bay Area to Ontario

Compare and see reviews for airlines that fly from San Francisco Bay Area to Ontario with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $27Free CancellationRating
5.8
3,080 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $46Free CancellationRating
6.3
8,189 reviews
Search Spirit Airlines flights
Avelo AirlinesPriceFrom $57Free CancellationRating
7.5
85 reviews
Search Avelo Airlines flights
United AirlinesPriceFrom $58Free CancellationRating
7.4
9,095 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $59Free CancellationRating
8.0
11,479 reviews
Search Alaska Airlines flights
DeltaPriceFrom $98Free CancellationRating
7.9
8,008 reviews
Search Delta flights
SouthwestPriceFrom $112Free CancellationRating
7.9
4,252 reviews
Search Southwest flights
American AirlinesPriceFrom $186Free CancellationRating
7.2
11,054 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco Bay Area to Ontario?

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

Can I find flights from San Francisco Bay Area to Ontario with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Ontario from San Francisco Bay Area with this policy.

How can momondo help me find flights from San Francisco Bay Area to Ontario?

momondo provides multiple filters to help you find the best flight to Ontario from San Francisco Bay Area. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from San Francisco Bay Area to Ontario right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Ontario, momondo offers a useful price alert feature which will track prices for flights to Ontario from San Francisco Bay Area and alert you when they change.

An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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