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.

$84 Cheap Flights from San Diego to Ontario in 2026

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Find the cheapest flights from San Diego to Los Angeles

Round-trip

One-way

Cheap round-trip flights

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12:23 pm - 11:59 pm

SAN

ONT

11h 36m

1 stop

6:00 am - 12:08 am

ONT

SAN

18h 08m

1 stop

$139Frontier

Sat, Feb 21 - Sat, Feb 28

8:00 am - 7:14 pm

SAN

ONT

11h 14m

2 stops

6:00 am - 12:08 am

ONT

SAN

18h 08m

1 stop

$150Frontier

Sat, Feb 21 - Sat, Feb 28

6:15 am - 10:44 pm

SAN

ONT

16h 29m

1 stop

12:02 pm - 9:49 pm

ONT

SAN

9h 47m

1 stop

$267Alaska Airlines

Tue, Feb 24 - Wed, Feb 25

7:00 am - 11:52 pm

SAN

ONT

16h 52m

1 stop

7:37 pm - 8:26 am

ONT

SAN

12h 49m

1 stop

$353Alaska Airlines

Wed, Feb 18 - Sat, Feb 21

7:00 am - 11:52 pm

SAN

ONT

16h 52m

1 stop

6:08 pm - 11:59 pm

ONT

SAN

5h 51m

1 stop

$363Alaska Airlines

Wed, Feb 18 - Thu, Feb 19

3:45 pm - 11:32 pm

SAN

ONT

7h 47m

1 stop

6:14 am - 4:46 pm

ONT

SAN

10h 32m

1 stop

$364Alaska Airlines

Thu, Mar 12 - Sun, Mar 15

12:05 pm - 10:44 pm

SAN

ONT

10h 39m

1 stop

6:14 am - 3:46 pm

ONT

SAN

9h 32m

1 stop

$373Alaska Airlines

Wed, Mar 11 - Sun, Mar 15

9:14 pm - 3:42 pm

SAN

ONT

18h 28m

1 stop

12:48 pm - 8:47 am

ONT

SAN

19h 59m

1 stop

$398Alaska Airlines

Sun, Apr 12 - Sat, May 2

9:10 am - 6:30 pm

SAN

ONT

9h 20m

1 stop

3:22 pm - 7:49 am

ONT

SAN

16h 27m

1 stop

$403Alaska Airlines

Wed, Jun 3 - Sun, Jun 14

9:24 am - 2:42 pm

SAN

ONT

5h 18m

1 stop

3:22 pm - 7:49 am

ONT

SAN

16h 27m

1 stop

$415Alaska Airlines

Sat, Jun 13 - Mon, Jun 15

Frontier flights from San Diego to Ontario

Our best Frontier deals on San Diego to Ontario flight tickets

Frontier

Feb 21

SAN12:23 pmSan Diego

11h 36m

1 stop

ONT11:59 pmOntario

Feb 28

ONT6:00 amOntario

18h 08m

1 stop

SAN12:08 amSan Diego

$139

Frontier

Feb 21

SAN8:00 amSan Diego

11h 14m

2 stops

ONT7:14 pmOntario

Feb 28

ONT6:00 amOntario

18h 08m

1 stop

SAN12:08 amSan Diego

$150

Frontier

Feb 22

SAN2:52 pmSan Diego

26h 56m

1 stop

ONT5:48 pmOntario

Mar 1

ONT10:14 pmOntario

14h 51m

1 stop

SAN1:05 pmSan Diego

$174

Alaska Airlines flights from San Diego to Ontario

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

Alaska Airlines

Feb 24

SAN6:15 amSan Diego

16h 29m

1 stop

ONT10:44 pmOntario

Feb 25

ONT12:02 pmOntario

9h 47m

1 stop

SAN9:49 pmSan Diego

$267

Alaska Airlines

Feb 18

SAN7:00 amSan Diego

16h 52m

1 stop

ONT11:52 pmOntario

Feb 21

ONT7:37 pmOntario

12h 49m

1 stop

SAN8:26 amSan Diego

$353

Alaska Airlines

Feb 18

SAN7:00 amSan Diego

16h 52m

1 stop

ONT11:52 pmOntario

Feb 19

ONT6:08 pmOntario

5h 51m

1 stop

SAN11:59 pmSan Diego

$363

Fly from

Fly to

Route

Depart

Return

Price

San DiegoOntario

SAN - ONT

SANONT

San Diego

Sat 2/21

12:23 pm-11:59 pm

1 stop11h 36m

Ontario

Sat 2/28

6:00 am-12:08 am

1 stop18h 08m

$139

San DiegoOntario

SAN - ONT

SANONT

San Diego

Sat 2/21

8:00 am-7:14 pm

2 stops11h 14m

Ontario

Sat 2/28

6:00 am-12:08 am

1 stop18h 08m

$150

San DiegoOntario

SAN - ONT

SANONT

San Diego

Tue 2/24

6:15 am-10:44 pm

1 stop16h 29m

Ontario

Wed 2/25

12:02 pm-9:49 pm

1 stop9h 47m

$267

San DiegoOntario

SAN - ONT

SANONT

San Diego

Wed 2/18

7:00 am-11:52 pm

1 stop16h 52m

Ontario

Sat 2/21

7:37 pm-8:26 am

1 stop12h 49m

$353

San DiegoOntario

SAN - ONT

SANONT

San Diego

Wed 2/18

7:00 am-11:52 pm

1 stop16h 52m

Ontario

Thu 2/19

6:08 pm-11:59 pm

1 stop5h 51m

$363

San DiegoOntario

SAN - ONT

SANONT

San Diego

Thu 3/12

3:45 pm-11:32 pm

1 stop7h 47m

Ontario

Sun 3/15

6:14 am-4:46 pm

1 stop10h 32m

$364

San DiegoOntario

SAN - ONT

SANONT

San Diego

Wed 3/11

12:05 pm-10:44 pm

1 stop10h 39m

Ontario

Sun 3/15

6:14 am-3:46 pm

1 stop9h 32m

$373

San DiegoOntario

SAN - ONT

SANONT

San Diego

Sun 4/12

9:14 pm-3:42 pm

1 stop18h 28m

Ontario

Sat 5/2

12:48 pm-8:47 am

1 stop19h 59m

$398

San DiegoOntario

SAN - ONT

SANONT

San Diego

Wed 6/3

9:10 am-6:30 pm

1 stop9h 20m

Ontario

Sun 6/14

3:22 pm-7:49 am

1 stop16h 27m

$403

San DiegoOntario

SAN - ONT

SANONT

San Diego

Sat 6/13

9:24 am-2:42 pm

1 stop5h 18m

Ontario

Mon 6/15

3:22 pm-7:49 am

1 stop16h 27m

$415

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 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?

Alaska Airlines is the most popular carrier 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 54% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 5 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	5h 18m
Direct flights	None

The fastest flight from San Diego to Ontario takes 5h 18m

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

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How far is San Diego to Ontario by plane?
The distance between San Diego and Ontario is about 97.3 mi. 5h 18m 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.