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

Alaska Airlines is the most popular carrier operating from Ontario to San Diego

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.

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.

$68 Cheap Flights from Ontario to San Diego in 2025/26

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Find the cheapest flights from Ontario to San Diego

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

7:15 am - 2:00 pmONT-SAN

6h 45m1 stop

7:00 am - 3:07 pmSAN-ONT

8h 07m1 stop

$130Frontier

Find Deal

Wed, Jan 14 - Wed, Jan 21

8:32 am - 12:24 amONT-SAN

15h 52m1 stop

8:26 pm - 2:12 pmSAN-ONT

17h 46m1 stop

$136Frontier

Find Deal

Sun, Jan 18 - Mon, Jan 19

6:45 am - 7:15 pmONT-SAN

12h 30m1 stop

1:06 pm - 5:22 pmSAN-ONT

4h 16m1 stop

$151Frontier

Find Deal

Thu, Dec 18 - Tue, Dec 23

6:49 pm - 8:21 amONT-SAN

13h 32m1 stop

7:00 am - 1:11 pmSAN-ONT

30h 11m2 stops

$158Frontier

Find Deal

Wed, Jan 14 - Wed, Jan 21

8:32 am - 8:27 pmONT-SAN

11h 55m2 stops

8:26 pm - 2:12 pmSAN-ONT

17h 46m1 stop

$162Frontier

Find Deal

Sun, Jan 18 - Mon, Jan 19

6:45 am - 7:15 pmONT-SAN

12h 30m1 stop

9:14 pm - 11:59 pmSAN-ONT

26h 45m2 stops

$164Frontier

Find Deal

Thu, Dec 18 - Tue, Dec 23

6:15 am - 12:38 pmONT-SAN

6h 23m1 stop

7:21 pm - 5:22 pmSAN-ONT

22h 01m1 stop

$180Frontier

Find Deal

Mon, Dec 15 - Mon, Dec 22

6:15 am - 10:46 pmONT-SAN

40h 31m2 stops

1:06 pm - 5:22 pmSAN-ONT

4h 16m1 stop

$184Frontier

Find Deal

Tue, Dec 16 - Tue, Dec 23

12:30 pm - 10:46 pmONT-SAN

34h 16m2 stops

1:06 pm - 5:22 pmSAN-ONT

4h 16m1 stop

$185Frontier

Find Deal

Tue, Dec 16 - Tue, Dec 23

6:15 am - 10:46 pmONT-SAN

40h 31m2 stops

1:06 pm - 5:22 pmSAN-ONT

4h 16m1 stop

$188Frontier

Find Deal

Tue, Dec 16 - Tue, Dec 23

Alaska Airlines flights from Ontario to San Diego

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

Alaska Airlines

Jan 28

ONT11:53 amOntario

7h 26m

1 stop

SAN7:19 pmSan Diego

Feb 1

SAN6:15 amSan Diego

8h 53m

1 stop

ONT3:08 pmOntario

$222

Find similar

Alaska Airlines

Dec 15

ONT7:33 pmOntario

19h 33m

1 stop

SAN3:06 pmSan Diego

Jan 12

SAN11:49 amSan Diego

12h 07m

1 stop

ONT11:56 pmOntario

$225

Find similar

Alaska Airlines

Jan 11

ONT6:00 amOntario

7h 19m

1 stop

SAN1:19 pmSan Diego

Jan 25

SAN8:42 pmSan Diego

14h 17m

1 stop

ONT10:59 amOntario

$264

Find similar

Delta flights from Ontario to San Diego

Our best Delta deals on Ontario to San Diego flight tickets

Delta

Jan 7

ONT7:30 amOntario

13h 13m

1 stop

SAN8:43 pmSan Diego

Jan 8

SAN7:00 amSan Diego

6h 56m

1 stop

ONT1:56 pmOntario

$267

Find similar

Delta

Jan 7

ONT7:30 amOntario

13h 13m

1 stop

SAN8:43 pmSan Diego

Jan 8

SAN7:00 amSan Diego

15h 51m

1 stop

ONT10:51 pmOntario

$287

Find similar

Delta

Dec 16

ONT5:49 pmOntario

20h 27m

1 stop

SAN2:16 pmSan Diego

Dec 23

SAN6:15 amSan Diego

17h 39m

1 stop

ONT11:54 pmOntario

$455

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Wed 1/14

7:15 am-2:00 pm

1 stop6h 45m

San Diego

Wed 1/21

7:00 am-3:07 pm

1 stop8h 07m

$130

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Sun 1/18

8:32 am-12:24 am

1 stop15h 52m

San Diego

Mon 1/19

8:26 pm-2:12 pm

1 stop17h 46m

$136

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Thu 12/18

6:45 am-7:15 pm

1 stop12h 30m

San Diego

Tue 12/23

1:06 pm-5:22 pm

1 stop4h 16m

$151

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Wed 1/14

6:49 pm-8:21 am

1 stop13h 32m

San Diego

Wed 1/21

7:00 am-1:11 pm

2 stops30h 11m

$158

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Sun 1/18

8:32 am-8:27 pm

2 stops11h 55m

San Diego

Mon 1/19

8:26 pm-2:12 pm

1 stop17h 46m

$162

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Thu 12/18

6:45 am-7:15 pm

1 stop12h 30m

San Diego

Tue 12/23

9:14 pm-11:59 pm

2 stops26h 45m

$164

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Mon 12/15

6:15 am-12:38 pm

1 stop6h 23m

San Diego

Mon 12/22

7:21 pm-5:22 pm

1 stop22h 01m

$180

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Tue 12/16

6:15 am-10:46 pm

2 stops40h 31m

San Diego

Tue 12/23

1:06 pm-5:22 pm

1 stop4h 16m

$184

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Tue 12/16

12:30 pm-10:46 pm

2 stops34h 16m

San Diego

Tue 12/23

1:06 pm-5:22 pm

1 stop4h 16m

$185

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Tue 12/16

6:15 am-10:46 pm

2 stops40h 31m

San Diego

Tue 12/23

1:06 pm-5:22 pm

1 stop4h 16m

$188

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 06m.
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.