What airlines fly to San Diego?

United Airlines, Delta and Alaska 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 41% 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 is the most popular carrier 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.

$87 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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Cheap round-trip flights

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6:00 am - 12:11 pmONT-SAN

6h 11m1 stop

3:29 pm - 11:14 pmSAN-ONT

7h 45m1 stop

$161Frontier

Find Deal

Wed, Dec 31 - Wed, Jan 7

6:17 pm - 12:11 pmONT-SAN

17h 54m1 stop

9:44 am - 3:09 pmSAN-ONT

5h 25m1 stop

$164Frontier

Find Deal

Tue, Dec 30 - Tue, Jan 6

6:00 am - 12:11 pmONT-SAN

6h 11m1 stop

1:06 pm - 5:22 pmSAN-ONT

4h 16m1 stop

$180Frontier

Find Deal

Wed, Dec 31 - Thu, Jan 1

6:00 am - 12:11 pmONT-SAN

6h 11m1 stop

1:03 pm - 11:14 pmSAN-ONT

10h 11m2 stops

$190Frontier

Find Deal

Wed, Dec 31 - Wed, Jan 7

6:17 pm - 11:59 pmONT-SAN

29h 42m2 stops

9:44 am - 3:09 pmSAN-ONT

5h 25m1 stop

$199Frontier

Find Deal

Tue, Dec 30 - Tue, Jan 6

4:03 pm - 10:07 amONT-SAN

18h 04m1 stop

8:42 pm - 3:08 pmSAN-ONT

18h 26m1 stop

$204Alaska Airlines

Find Deal

Sat, Jan 31 - Mon, Feb 2

4:02 pm - 11:03 pmONT-SAN

7h 01m1 stop

6:15 am - 11:32 pmSAN-ONT

17h 17m1 stop

$226Alaska Airlines

Find Deal

Fri, Feb 27 - Sat, Feb 28

6:07 pm - 12:38 pmONT-SAN

18h 31m1 stop

7:21 pm - 5:22 pmSAN-ONT

22h 01m1 stop

$230Frontier

Find Deal

Thu, Dec 25 - Mon, Dec 29

6:17 pm - 12:38 pmONT-SAN

18h 21m1 stop

7:21 pm - 5:22 pmSAN-ONT

22h 01m1 stop

$235Frontier

Find Deal

Thu, Dec 18 - Mon, Dec 22

11:53 am - 10:07 amONT-SAN

22h 14m1 stop

8:42 pm - 3:08 pmSAN-ONT

18h 26m1 stop

$246Alaska Airlines

Find Deal

Sun, Jan 25 - Fri, Jan 30

Alaska Airlines flights from Ontario to San Diego

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

Alaska Airlines

Jan 31

ONT4:03 pmOntario

18h 04m

1 stop

SAN10:07 amSan Diego

Feb 2

SAN8:42 pmSan Diego

18h 26m

1 stop

ONT3:08 pmOntario

$204

Find similar

Alaska Airlines

Feb 27

ONT4:02 pmOntario

7h 01m

1 stop

SAN11:03 pmSan Diego

Feb 28

SAN6:15 amSan Diego

17h 17m

1 stop

ONT11:32 pmOntario

$226

Find similar

Alaska Airlines

Jan 25

ONT11:53 amOntario

22h 14m

1 stop

SAN10:07 amSan Diego

Jan 30

SAN8:42 pmSan Diego

18h 26m

1 stop

ONT3:08 pmOntario

$246

Find similar

Frontier flights from Ontario to San Diego

Our best Frontier deals on Ontario to San Diego flight tickets

Frontier

Dec 31

ONT6:00 amOntario

6h 11m

1 stop

SAN12:11 pmSan Diego

Jan 7

SAN3:29 pmSan Diego

7h 45m

1 stop

ONT11:14 pmOntario

$161

Find similar

Frontier

Dec 30

ONT6:17 pmOntario

17h 54m

1 stop

SAN12:11 pmSan Diego

Jan 6

SAN9:44 amSan Diego

5h 25m

1 stop

ONT3:09 pmOntario

$164

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

$179

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Wed 12/31

6:00 am-12:11 pm

1 stop6h 11m

San Diego

Wed 1/7

3:29 pm-11:14 pm

1 stop7h 45m

$161

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Tue 12/30

6:17 pm-12:11 pm

1 stop17h 54m

San Diego

Tue 1/6

9:44 am-3:09 pm

1 stop5h 25m

$164

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Wed 12/31

6:00 am-12:11 pm

1 stop6h 11m

San Diego

Thu 1/1

1:06 pm-5:22 pm

1 stop4h 16m

$180

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Wed 12/31

6:00 am-12:11 pm

1 stop6h 11m

San Diego

Wed 1/7

1:03 pm-11:14 pm

2 stops10h 11m

$190

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Tue 12/30

6:17 pm-11:59 pm

2 stops29h 42m

San Diego

Tue 1/6

9:44 am-3:09 pm

1 stop5h 25m

$199

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Sat 1/31

4:03 pm-10:07 am

1 stop18h 04m

San Diego

Mon 2/2

8:42 pm-3:08 pm

1 stop18h 26m

$204

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Fri 2/27

4:02 pm-11:03 pm

1 stop7h 01m

San Diego

Sat 2/28

6:15 am-11:32 pm

1 stop17h 17m

$226

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Thu 12/25

6:07 pm-12:38 pm

1 stop18h 31m

San Diego

Mon 12/29

7:21 pm-5:22 pm

1 stop22h 01m

$230

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Thu 12/18

6:17 pm-12:38 pm

1 stop18h 21m

San Diego

Mon 12/22

7:21 pm-5:22 pm

1 stop22h 01m

$235

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

Sun 1/25

11:53 am-10:07 am

1 stop22h 14m

San Diego

Fri 1/30

8:42 pm-3:08 pm

1 stop18h 26m

$246

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 $239. Flights in the afternoon are often more expensive with an average ticket price of $275.

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

Fastest flight time	5h 51m
Direct flights	None

The fastest flight from Ontario to San Diego takes 5h 51m

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 4h 16m.
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

Poway

La Mesa

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.