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Cheap flights from San Diego to Los Angeles from $89

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 Diego to Los Angeles departing on 4/21. 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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Find the cheapest flights from San Diego to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
9:28 pm - 11:55 pm
SAN
-
ONT
26h 27m
1 stop
Frontier Logo
5:33 pm - 11:06 pm
ONT
-
SAN
29h 33m
1 stop
$177Frontier
Mon, Apr 13 - Mon, Apr 20
Frontier Logo
9:28 pm - 6:49 pm
SAN
-
ONT
21h 21m
2 stops
Frontier Logo
5:33 pm - 11:59 pm
ONT
-
SAN
6h 26m
1 stop
$218Frontier
Mon, Apr 13 - Mon, Apr 20
Alaska Airlines Logo
9:14 pm - 3:42 pm
SAN
-
ONT
18h 28m
1 stop
Alaska Airlines Logo
4:22 pm - 9:29 pm
ONT
-
SAN
5h 07m
1 stop
$253Alaska Airlines
Tue, Apr 14 - Tue, Apr 21
Frontier Logo
10:07 pm - 3:09 pm
SAN
-
ONT
17h 02m
1 stop
Frontier Logo
4:04 pm - 9:12 pm
ONT
-
SAN
5h 08m
1 stop
$272Frontier
Fri, May 8 - Sun, May 10
Alaska Airlines Logo
7:59 am - 3:42 pm
SAN
-
ONT
7h 43m
1 stop
Alaska Airlines Logo
4:22 pm - 8:58 am
ONT
-
SAN
16h 36m
1 stop
$273Alaska Airlines
Tue, Apr 14 - Wed, Apr 15
Alaska Airlines Logo
5:17 pm - 12:08 pm
SAN
-
ONT
18h 51m
1 stop
Alaska Airlines Logo
3:24 pm - 10:36 pm
ONT
-
SAN
7h 12m
1 stop
$280Alaska Airlines
Tue, May 5 - Wed, May 6
Frontier Logo
1:38 pm - 11:49 pm
SAN
-
ONT
10h 11m
2 stops
Frontier Logo
10:50 am - 8:42 am
ONT
-
SAN
21h 52m
1 stop
$306Frontier
Fri, May 8 - Sun, May 10
Alaska Airlines Logo
7:15 am - 2:32 pm
SAN
-
ONT
7h 17m
1 stop
Alaska Airlines Logo
7:59 pm - 12:04 pm
ONT
-
SAN
16h 05m
1 stop
$307Alaska Airlines
Wed, Apr 29 - Mon, May 11
Alaska Airlines Logo
11:01 am - 11:48 pm
SAN
-
ONT
12h 47m
1 stop
Alaska Airlines Logo
12:48 pm - 9:10 am
ONT
-
SAN
20h 22m
1 stop
$318Alaska Airlines
Tue, May 5 - Wed, May 6
Alaska Airlines Logo
5:17 pm - 12:08 pm
SAN
-
ONT
18h 51m
1 stop
Alaska Airlines Logo
12:48 pm - 9:10 am
ONT
-
SAN
20h 22m
1 stop
$343Alaska Airlines
Wed, Apr 29 - Tue, May 5

Frontier flights from San Diego to Ontario

Our best Frontier deals on San Diego to Ontario flight tickets
Frontier
Apr 13
SAN9:28 pmSan Diego
26h 27m
1 stop
ONT11:55 pmOntario
Apr 20
ONT5:33 pmOntario
29h 33m
1 stop
SAN11:06 pmSan Diego
$177
Frontier
Apr 13
SAN9:28 pmSan Diego
21h 21m
2 stops
ONT6:49 pmOntario
Apr 20
ONT5:33 pmOntario
6h 26m
1 stop
SAN11:59 pmSan Diego
$218
Frontier
May 8
SAN10:07 pmSan Diego
17h 02m
1 stop
ONT3:09 pmOntario
May 10
ONT4:04 pmOntario
5h 08m
1 stop
SAN9:12 pmSan Diego
$272

Alaska Airlines flights from San Diego to Ontario

Our best Alaska Airlines deals on San Diego to Ontario flight tickets
Alaska Airlines
Apr 14
SAN9:14 pmSan Diego
18h 28m
1 stop
ONT3:42 pmOntario
Apr 21
ONT4:22 pmOntario
5h 07m
1 stop
SAN9:29 pmSan Diego
$253
Alaska Airlines
Apr 14
SAN7:59 amSan Diego
7h 43m
1 stop
ONT3:42 pmOntario
Apr 15
ONT4:22 pmOntario
16h 36m
1 stop
SAN8:58 amSan Diego
$273
Alaska Airlines
May 5
SAN5:17 pmSan Diego
18h 51m
1 stop
ONT12:08 pmOntario
May 6
ONT3:24 pmOntario
7h 12m
1 stop
SAN10:36 pmSan Diego
$280

momondo Fare Finder

 
Customize your flight search to find flights from San Diego 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 March 18, 2026.
Use the filters below to find and compare flights from San Diego to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San DiegoOntario

SAN - ONT

SANONT

San Diego

Mon 4/13

9:28 pm-11:55 pm

1 stop26h 27m

Ontario

Mon 4/20

5:33 pm-11:06 pm

1 stop29h 33m

$177

San DiegoOntario

SAN - ONT

SANONT

San Diego

Mon 4/13

9:28 pm-6:49 pm

2 stops21h 21m

Ontario

Mon 4/20

5:33 pm-11:59 pm

1 stop6h 26m

$218

San DiegoOntario

SAN - ONT

SANONT

San Diego

Tue 4/14

9:14 pm-3:42 pm

1 stop18h 28m

Ontario

Tue 4/21

4:22 pm-9:29 pm

1 stop5h 07m

$253
Quickest round-trip

San DiegoOntario

SAN - ONT

SANONT

San Diego

Fri 5/8

10:07 pm-3:09 pm

1 stop17h 02m

Ontario

Sun 5/10

4:04 pm-9:12 pm

1 stop5h 08m

$272

San DiegoOntario

SAN - ONT

SANONT

San Diego

Tue 4/14

7:59 am-3:42 pm

1 stop7h 43m

Ontario

Wed 4/15

4:22 pm-8:58 am

1 stop16h 36m

$273

San DiegoOntario

SAN - ONT

SANONT

San Diego

Tue 5/5

5:17 pm-12:08 pm

1 stop18h 51m

Ontario

Wed 5/6

3:24 pm-10:36 pm

1 stop7h 12m

$280

San DiegoOntario

SAN - ONT

SANONT

San Diego

Fri 5/8

1:38 pm-11:49 pm

2 stops10h 11m

Ontario

Sun 5/10

10:50 am-8:42 am

1 stop21h 52m

$306

San DiegoOntario

SAN - ONT

SANONT

San Diego

Wed 4/29

7:15 am-2:32 pm

1 stop7h 17m

Ontario

Mon 5/11

7:59 pm-12:04 pm

1 stop16h 05m

$307

San DiegoOntario

SAN - ONT

SANONT

San Diego

Tue 5/5

11:01 am-11:48 pm

1 stop12h 47m

Ontario

Wed 5/6

12:48 pm-9:10 am

1 stop20h 22m

$318

San DiegoOntario

SAN - ONT

SANONT

San Diego

Wed 4/29

5:17 pm-12:08 pm

1 stop18h 51m

Ontario

Tue 5/5

12:48 pm-9:10 am

1 stop20h 22m

$343

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 Los Angeles from

How to get the cheapest flight ticket from San Diego 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 airline that flies from San Diego to Ontario?

Frontier and Alaska Airlines are the most popular carriers operating from San Diego to Ontario

What airlines fly to Ontario?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Ontario from San Diego according to our data. United Airlines is the first choice among our users, with 58% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 4 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

When to book flights from San Diego to Ontario

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

Cheap San Diego to Ontario (SAN to ONT) flight deals and tips

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

Fastest flight time

4h 42m

Direct flights

None
The fastest flight from San Diego to Ontario takes 4h 42m
There are no direct flights from San Diego to Ontario. There are no popular flight routes from San Diego to Ontario.
Search flight deals

  • How far is San Diego to Ontario by plane?

    The distance between San Diego and Ontario is about 97.3 mi. 4h 42m is a normal flight duration for this route.

  • When did momondo last update prices for flights from San Diego Airport to Ontario Airport?

    Prices for flights from San Diego Airport to Ontario Airport are refreshed on a daily basis.

  • How old do you have to be to fly from San Diego Airport to Ontario Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Diego Airport 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.

Why use momondo?

Why should I use momondo to find a flight deal from San Diego to Ontario?

Finding the right flight to Ontario from San Diego is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Ontario quick and easy, saving you time and money.

Can I find flights from San Diego to Ontario with flexible booking policies on momondo?

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

How can momondo help me find flights from San Diego to Ontario?

Once you have performed a search for San Diego to Ontario flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Price alerts on flights to Ontario from San Diego are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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