What airlines fly to San Diego?

United Airlines, Delta and Spirit Airlines are the top three most popular airlines that fly to San Diego from Ontario according to our data. United Airlines is the first choice among our users, with 39% of people opting to fly with this airline when traveling to San Diego. Keep in mind that there are 5 different airlines that fly to San Diego on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Ontario to San Diego?

Frontier, United Airlines, and American Airlines are the most popular carriers operating from Ontario to San Diego

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

Prices for flights from Ontario Airport to San Diego Airport are updated daily.

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

What documentation or ID do you need to fly to San Diego Airport?

The necessary travel and health documents for your San Diego Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$70 Cheap Flights from Ontario to San Diego in 2025

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Find the cheapest flights from Ontario to San Diego

Round-trip

One-way

Last minute

Cheap round-trip flights

10:28 pm - 6:42 pmONT-SAN

20h 14m1 stop

7:47 pm - 8:26 amSAN-ONT

12h 39m1 stop

$133

Find Deal

Mon, Sep 8 - Wed, Sep 10

8:00 am - 9:24 pmONT-SAN

13h 24m1 stop

8:00 am - 9:56 pmSAN-ONT

13h 56m1 stop

$158Frontier

Find Deal

Wed, Sep 24 - Wed, Oct 1

5:15 pm - 11:04 pmONT-SAN

5h 49m1 stop

4:06 pm - 7:47 amSAN-ONT

15h 41m1 stop

$192Frontier

Find Deal

Fri, Oct 24 - Sun, Oct 26

2:45 pm - 11:17 pmONT-SAN

8h 32m1 stop

8:00 am - 7:54 pmSAN-ONT

11h 54m2 stops

$202Frontier

Find Deal

Mon, Sep 8 - Wed, Sep 10

8:00 am - 9:24 pmONT-SAN

13h 24m1 stop

10:16 am - 9:56 pmSAN-ONT

11h 40m2 stops

$210Frontier

Find Deal

Wed, Sep 24 - Wed, Oct 1

9:36 am - 10:44 pmONT-SAN

13h 08m1 stop

7:28 pm - 12:13 pmSAN-ONT

16h 45m1 stop

$317United Airlines

Find Deal

Mon, Oct 20 - Tue, Oct 21

6:00 am - 2:48 pmONT-SAN

8h 48m1 stop

7:45 pm - 10:44 amSAN-ONT

14h 59m1 stop

$432Alaska Airlines

Find Deal

Wed, Sep 24 - Wed, Sep 24

4:45 pm - 9:52 pmONT-SAN

5h 07m1 stop

4:40 pm - 9:48 pmSAN-ONT

5h 08m1 stop

$729American Airlines

Find Deal

Thu, Sep 18 - Sun, Sep 21

4:45 pm - 9:52 pmONT-SAN

5h 07m1 stop

1:06 pm - 6:12 pmSAN-ONT

5h 06m1 stop

$730American Airlines

Find Deal

Thu, Sep 18 - Sun, Sep 21

7:10 am - 1:07 pmONT-SAN

5h 57m1 stop

7:15 am - 2:12 pmSAN-ONT

6h 57m1 stop

$757Alaska Airlines

Find Deal

Tue, Sep 9 - Tue, Sep 16

American Airlines flights from Ontario to San Diego

Our best American Airlines deals on Ontario to San Diego flight tickets

American Airlines

Sep 18

ONT4:45 pmOntario

5h 07m

1 stop

SAN9:52 pmSan Diego

Sep 21

SAN4:40 pmSan Diego

5h 08m

1 stop

ONT9:48 pmOntario

$729

Find similar

American Airlines

Sep 18

ONT4:45 pmOntario

5h 07m

1 stop

SAN9:52 pmSan Diego

Sep 21

SAN1:06 pmSan Diego

5h 06m

1 stop

ONT6:12 pmOntario

$730

Find similar

American Airlines

Sep 18

ONT4:45 pmOntario

5h 07m

1 stop

SAN9:52 pmSan Diego

Sep 21

SAN4:40 pmSan Diego

5h 08m

1 stop

ONT9:48 pmOntario

$779

Find similar

Frontier flights from Ontario to San Diego

Our best Frontier deals on Ontario to San Diego flight tickets

Frontier

Sep 24

ONT8:00 amOntario

13h 24m

1 stop

SAN9:24 pmSan Diego

Oct 1

SAN8:00 amSan Diego

13h 56m

1 stop

ONT9:56 pmOntario

$158

Find similar

Frontier

Oct 24

ONT5:15 pmOntario

5h 49m

1 stop

SAN11:04 pmSan Diego

Oct 26

SAN4:06 pmSan Diego

15h 41m

1 stop

ONT7:47 amOntario

$192

Find similar

Frontier

Sep 8

ONT2:45 pmOntario

8h 32m

1 stop

SAN11:17 pmSan Diego

Sep 10

SAN8:00 amSan Diego

11h 54m

2 stops

ONT7:54 pmOntario

$202

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Mon 9/8

10:28 pm-6:42 pm

1 stop20h 14m

San Diego

Wed 9/10

7:47 pm-8:26 am

1 stop12h 39m

$133

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Wed 9/24

8:00 am-9:24 pm

1 stop13h 24m

San Diego

Wed 10/1

8:00 am-9:56 pm

1 stop13h 56m

$158

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Fri 10/24

5:15 pm-11:04 pm

1 stop5h 49m

San Diego

Sun 10/26

4:06 pm-7:47 am

1 stop15h 41m

$192

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Mon 9/8

2:45 pm-11:17 pm

1 stop8h 32m

San Diego

Wed 9/10

8:00 am-7:54 pm

2 stops11h 54m

$202

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Wed 9/24

8:00 am-9:24 pm

1 stop13h 24m

San Diego

Wed 10/1

10:16 am-9:56 pm

2 stops11h 40m

$210

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Mon 10/20

9:36 am-10:44 pm

1 stop13h 08m

San Diego

Tue 10/21

7:28 pm-12:13 pm

1 stop16h 45m

$317

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Wed 9/24

6:00 am-2:48 pm

1 stop8h 48m

San Diego

Wed 9/24

7:45 pm-10:44 am

1 stop14h 59m

$432

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Thu 9/18

4:45 pm-9:52 pm

1 stop5h 07m

San Diego

Sun 9/21

4:40 pm-9:48 pm

1 stop5h 08m

$729

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Thu 9/18

4:45 pm-9:52 pm

1 stop5h 07m

San Diego

Sun 9/21

1:06 pm-6:12 pm

1 stop5h 06m

$730

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Tue 9/9

7:10 am-1:07 pm

1 stop5h 57m

San Diego

Tue 9/16

7:15 am-2:12 pm

1 stop6h 57m

$757

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to San Diego

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

Prices

Airlines

What is the cheapest day to depart on your flight to San Diego?

The cheapest day to depart from Ontario to San Diego is on a Tuesday. Travelers who choose to depart for San Diego on a Tuesday will often find tickets for as low as $179. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $407. These prices are subject to change though, so be sure to set up a Price Alert for flights to San Diego.

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

The cheapest time of day to fly to San Diego is at noon when flights can be purchased for as low as $179. Flights in the afternoon are often more expensive with an average ticket price of $261.

When to book flights from Ontario to San Diego

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

Estimated round-trip price

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

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

Direct flights	None

There are no direct flights from Ontario to San Diego. There are no popular flight routes from Ontario to San Diego.

Search flight deals

How far is Ontario to San Diego by plane?
A flight from Ontario to San Diego will travel around 97.3 mi. By plane, this route typically takes 5h 07m.
When did momondo last update prices for flights from Ontario Airport to San Diego Airport?
Prices for flights from Ontario Airport to San Diego Airport are updated daily.
How old do you have to be to fly from Ontario Airport to San Diego 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 Ontario Airport to San Diego Airport.
What documentation or ID do you need to fly to San Diego Airport?
The necessary travel and health documents for your San Diego Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Coronado

Chula Vista

El Cajon

Julian

La Mesa

National City

Imperial Beach

Poway

San Ysidro

Borrego Springs

Alpine

Lemon Grove

Santee

Why use momondo?

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

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

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

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

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Diego from Ontario.

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

Of course. momondo tracks the price of Ontario to San Diego flights. All you need is a valid email address and we will do the rest; it is that quick and easy.