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 40% 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?

Alaska Airlines, Hawaiian Airlines, and Frontier 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.

$119 Cheap Flights from Ontario to San Diego in 2025/26

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Find the cheapest flights from Ontario to San Diego

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:17 pm - 12:38 pmONT-SAN

18h 21m1 stop

1:06 pm - 5:22 pmSAN-ONT

4h 16m1 stop

$133Frontier

Find Deal

jue., dic. 18 - jue., dic. 25

6:17 pm - 12:38 pmONT-SAN

18h 21m1 stop

1:06 pm - 5:22 pmSAN-ONT

4h 16m1 stop

$134Frontier

Find Deal

jue., dic. 18 - jue., dic. 25

6:00 am - 7:33 pmONT-SAN

13h 33m1 stop

8:59 pm - 11:19 amSAN-ONT

14h 20m1 stop

$226Alaska Airlines

Find Deal

mié., dic. 3 - sáb., dic. 6

6:00 am - 12:07 amONT-SAN

18h 07m1 stop

8:50 pm - 10:39 amSAN-ONT

13h 49m1 stop

$275Alaska Airlines

Find Deal

vie., feb. 20 - lun., feb. 23

1:53 pm - 8:37 amONT-SAN

18h 44m1 stop

1:00 pm - 10:53 pmSAN-ONT

9h 53m1 stop

$386United Airlines

Find Deal

lun., ene. 26 - mar., ene. 27

5:05 am - 8:48 pmONT-SAN

15h 43m2 stops

5:45 pm - 12:32 pmSAN-ONT

18h 47m2 stops

$484United Airlines

Find Deal

sáb., dic. 13 - lun., dic. 15

6:11 am - 3:19 pmONT-SAN

9h 08m1 stop

7:30 pm - 9:01 amSAN-ONT

13h 31m1 stop

$485American Airlines

Find Deal

sáb., nov. 22 - mié., nov. 26

9:59 am - 3:19 pmONT-SAN

5h 20m1 stop

12:50 pm - 6:19 pmSAN-ONT

5h 29m1 stop

$729American Airlines

Find Deal

lun., dic. 1 - sáb., dic. 6

12:42 am - 2:28 pmONT-SAN

13h 46m2 stops

8:23 pm - 9:55 amSAN-ONT

13h 32m1 stop

$1,000Multiple Airlines

Find Deal

lun., nov. 17 - sáb., nov. 22

12:42 am - 2:28 pmONT-SAN

13h 46m2 stops

12:30 pm - 6:44 pmSAN-ONT

6h 14m1 stop

$1,323Multiple Airlines

Find Deal

mar., nov. 18 - sáb., nov. 22

Frontier flights from Ontario to San Diego

Our best Frontier deals on Ontario to San Diego flight tickets

Frontier

Dec 18

ONT6:17 pmOntario

18h 21m

1 stop

SAN12:38 pmSan Diego

Dec 25

SAN1:06 pmSan Diego

4h 16m

1 stop

ONT5:22 pmOntario

$133

Find similar

Frontier

Dec 18

ONT6:17 pmOntario

18h 21m

1 stop

SAN12:38 pmSan Diego

Dec 25

SAN1:06 pmSan Diego

4h 16m

1 stop

ONT5:22 pmOntario

$134

Find similar

Frontier

Dec 13

ONT6:15 amOntario

13h 52m

2 stops

SAN8:07 pmSan Diego

Dec 15

SAN1:33 pmSan Diego

7h 44m

1 stop

ONT9:17 pmOntario

$163

Find similar

United Airlines flights from Ontario to San Diego

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

United Airlines

Jan 26

ONT1:53 pmOntario

18h 44m

1 stop

SAN8:37 amSan Diego

Jan 27

SAN1:00 pmSan Diego

9h 53m

1 stop

ONT10:53 pmOntario

$386

Find similar

United Airlines

Nov 16

ONT6:00 amOntario

8h 55m

1 stop

SAN2:55 pmSan Diego

Nov 18

SAN1:10 pmSan Diego

9h 41m

1 stop

ONT10:51 pmOntario

$483

Find similar

United Airlines

Dec 13

ONT5:05 amOntario

15h 43m

2 stops

SAN8:48 pmSan Diego

Dec 15

SAN5:45 pmSan Diego

18h 47m

2 stops

ONT12:32 pmOntario

$484

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

jue. 12/18

6:17 pm-12:38 pm

1 stop18h 21m

San Diego

jue. 12/25

1:06 pm-5:22 pm

1 stop4h 16m

$133

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

jue. 12/18

6:17 pm-12:38 pm

1 stop18h 21m

San Diego

jue. 12/25

1:06 pm-5:22 pm

1 stop4h 16m

$134

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

mié. 12/3

6:00 am-7:33 pm

1 stop13h 33m

San Diego

sáb. 12/6

8:59 pm-11:19 am

1 stop14h 20m

$226

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

vie. 2/20

6:00 am-12:07 am

1 stop18h 07m

San Diego

lun. 2/23

8:50 pm-10:39 am

1 stop13h 49m

$275

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

lun. 1/26

1:53 pm-8:37 am

1 stop18h 44m

San Diego

mar. 1/27

1:00 pm-10:53 pm

1 stop9h 53m

$386

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

sáb. 12/13

5:05 am-8:48 pm

2 stops15h 43m

San Diego

lun. 12/15

5:45 pm-12:32 pm

2 stops18h 47m

$484

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

sáb. 11/22

6:11 am-3:19 pm

1 stop9h 08m

San Diego

mié. 11/26

7:30 pm-9:01 am

1 stop13h 31m

$485

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

lun. 12/1

9:59 am-3:19 pm

1 stop5h 20m

San Diego

sáb. 12/6

12:50 pm-6:19 pm

1 stop5h 29m

$729

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

lun. 11/17

12:42 am-2:28 pm

2 stops13h 46m

San Diego

sáb. 11/22

8:23 pm-9:55 am

1 stop13h 32m

$1,000

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

mar. 11/18

12:42 am-2:28 pm

2 stops13h 46m

San Diego

sáb. 11/22

12:30 pm-6:44 pm

1 stop6h 14m

$1,323

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 in the morning when flights can be purchased for as low as $228. Flights in the afternoon are often more expensive with an average ticket price of $281.

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 20m.
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

National City

Imperial Beach

La Mesa

Poway

Borrego Springs

San Ysidro

Lemon Grove

Alpine

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.