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Cheap flights from Ontario to San Diego from $78

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Ontario to San Diego

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
2:23 pm - 7:35 pmONT  Ontario-SAN San Diego
5h 12m1 stop Las Vegas Harry Reid Intl
Frontier Logo
11:26 am - 7:36 pmSAN  San Diego-ONT Ontario
8h 10m1 stop Las Vegas Harry Reid Intl
$155Frontier
Thu, Nov 19 - Thu, Nov 26
Frontier Logo
10:35 am - 11:57 pmONT  Ontario-SAN San Diego
13h 22m2 stops Las Vegas Harry Reid Intl Denver Intl
Frontier Logo
8:20 pm - 9:40 amSAN  San Diego-ONT Ontario
13h 20m1 stop Las Vegas Harry Reid Intl
$159Frontier
Wed, Nov 11 - Mon, Nov 16
Frontier Logo
11:52 am - 11:57 pmONT  Ontario-SAN San Diego
12h 05m1 stop Denver Intl
Frontier Logo
8:20 pm - 9:40 amSAN  San Diego-ONT Ontario
13h 20m1 stop Las Vegas Harry Reid Intl
$177Frontier
Wed, Nov 11 - Mon, Nov 16
Frontier Logo
10:35 am - 11:57 pmONT  Ontario-SAN San Diego
13h 22m2 stops Las Vegas Harry Reid Intl Denver Intl
Frontier Logo
8:20 pm - 9:40 amSAN  San Diego-ONT Ontario
13h 20m1 stop Las Vegas Harry Reid Intl
$178Frontier
Wed, Nov 11 - Mon, Nov 16
Frontier Logo
10:35 am - 11:57 pmONT  Ontario-SAN San Diego
13h 22m2 stops Las Vegas Harry Reid Intl Denver Intl
Frontier Logo
7:38 pm - 4:21 pmSAN  San Diego-ONT Ontario
20h 43m2 stops Phoenix Sky Harbor Intl Las Vegas Harry Reid Intl
$182Frontier
Wed, Nov 11 - Mon, Nov 16
Frontier Logo
10:00 am - 6:38 pmONT  Ontario-SAN San Diego
32h 38m2 stops Las Vegas Harry Reid Intl San Francisco
Frontier Logo
4:53 pm - 9:40 amSAN  San Diego-ONT Ontario
16h 47m2 stops Denver Intl Las Vegas Harry Reid Intl
$188Frontier
Sat, Nov 14 - Tue, Nov 17
Frontier Logo
2:23 pm - 7:35 pmONT  Ontario-SAN San Diego
5h 12m1 stop Las Vegas Harry Reid Intl
Frontier Logo
8:50 am - 7:36 pmSAN  San Diego-ONT Ontario
10h 46m1 stop Las Vegas Harry Reid Intl
$193Frontier
Thu, Nov 19 - Tue, Nov 24
Frontier Logo
6:30 am - 3:58 pmONT  Ontario-SAN San Diego
9h 28m1 stop Denver Intl
Frontier Logo
8:20 pm - 9:40 amSAN  San Diego-ONT Ontario
13h 20m1 stop Las Vegas Harry Reid Intl
$200Frontier
Wed, Nov 11 - Mon, Nov 16
Frontier Logo
10:35 am - 11:57 pmONT  Ontario-SAN San Diego
13h 22m2 stops Las Vegas Harry Reid Intl Denver Intl
Frontier Logo
7:38 pm - 4:21 pmSAN  San Diego-ONT Ontario
20h 43m2 stops Phoenix Sky Harbor Intl Las Vegas Harry Reid Intl
$204Frontier
Wed, Nov 11 - Mon, Nov 16
Frontier Logo
10:00 am - 6:38 pmONT  Ontario-SAN San Diego
32h 38m2 stops Las Vegas Harry Reid Intl San Francisco
Frontier Logo
4:53 pm - 11:51 pmSAN  San Diego-ONT Ontario
6h 58m1 stop Denver Intl
$206Frontier
Sat, Nov 14 - Tue, Nov 17

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Frontier flights from Ontario to San Diego

Our best Frontier deals on Ontario to San Diego flight tickets
Frontier
Dec 3
ONT8:00 amOntario
10h 10m
2 stops
SAN6:10 pmSan Diego
Dec 6
SAN8:57 amSan Diego
9h 34m
1 stop
ONT6:31 pmOntario
$149
Frontier
Dec 17
ONT9:00 amOntario
3h 29m
1 stop
SAN12:29 pmSan Diego
Dec 20
SAN7:56 pmSan Diego
11h 11m
1 stop
ONT7:07 amOntario
$153
Frontier
Nov 11
ONT10:35 amOntario
13h 22m
2 stops
SAN11:57 pmSan Diego
Nov 16
SAN8:20 pmSan Diego
13h 20m
1 stop
ONT9:40 amOntario
$159

Southwest flights from Ontario to San Diego

Our best Southwest deals on Ontario to San Diego flight tickets
Southwest
Nov 3
ONT3:05 pmOntario
4h 30m
1 stop
SAN7:35 pmSan Diego
Nov 7
SAN7:15 amSan Diego
4h 05m
1 stop
ONT11:20 amOntario
$567
Southwest
Nov 3
ONT1:30 pmOntario
4h 35m
1 stop
SAN6:05 pmSan Diego
Nov 7
SAN9:20 amSan Diego
6h 00m
2 stops
ONT3:20 pmOntario
$572
Southwest
Oct 30
ONT9:45 amOntario
4h 30m
1 stop
SAN2:15 pmSan Diego
Oct 31
SAN6:35 amSan Diego
6h 25m
1 stop
ONT1:00 pmOntario
$733

momondo Fare Finder

 
Use the filters below to find and compare flights from Ontario to San Diego that are best for you.

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Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

OntarioSan Diego

ONT Ontario - SAN San Diego

ONTSAN

Ontario

Thu 11/19

2:23 pm-7:35 pm

1 stop5h 12m

San Diego

Thu 11/26

11:26 am-7:36 pm

1 stop8h 10m

$155

OntarioSan Diego

ONT Ontario - SAN San Diego

ONTSAN

Ontario

Wed 11/11

10:35 am-11:57 pm

2 stops13h 22m

San Diego

Mon 11/16

8:20 pm-9:40 am

1 stop13h 20m

$159

OntarioSan Diego

ONT Ontario - SAN San Diego

ONTSAN

Ontario

Wed 11/11

11:52 am-11:57 pm

1 stop12h 05m

San Diego

Mon 11/16

8:20 pm-9:40 am

1 stop13h 20m

$177

OntarioSan Diego

ONT Ontario - SAN San Diego

ONTSAN

Ontario

Wed 11/11

10:35 am-11:57 pm

2 stops13h 22m

San Diego

Mon 11/16

8:20 pm-9:40 am

1 stop13h 20m

$178

OntarioSan Diego

ONT Ontario - SAN San Diego

ONTSAN

Ontario

Wed 11/11

10:35 am-11:57 pm

2 stops13h 22m

San Diego

Mon 11/16

7:38 pm-4:21 pm

2 stops20h 43m

$182

OntarioSan Diego

ONT Ontario - SAN San Diego

ONTSAN

Ontario

Sat 11/14

10:00 am-6:38 pm

2 stops32h 38m

San Diego

Tue 11/17

4:53 pm-9:40 am

2 stops16h 47m

$188

OntarioSan Diego

ONT Ontario - SAN San Diego

ONTSAN

Ontario

Thu 11/19

2:23 pm-7:35 pm

1 stop5h 12m

San Diego

Tue 11/24

8:50 am-7:36 pm

1 stop10h 46m

$193

OntarioSan Diego

ONT Ontario - SAN San Diego

ONTSAN

Ontario

Wed 11/11

6:30 am-3:58 pm

1 stop9h 28m

San Diego

Mon 11/16

8:20 pm-9:40 am

1 stop13h 20m

$200

OntarioSan Diego

ONT Ontario - SAN San Diego

ONTSAN

Ontario

Wed 11/11

10:35 am-11:57 pm

2 stops13h 22m

San Diego

Mon 11/16

7:38 pm-4:21 pm

2 stops20h 43m

$204

OntarioSan Diego

ONT Ontario - SAN San Diego

ONTSAN

Ontario

Sat 11/14

10:00 am-6:38 pm

2 stops32h 38m

San Diego

Tue 11/17

4:53 pm-11:51 pm

1 stop6h 58m

$206

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Diego from

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

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 Thursday. Travelers who choose to depart for San Diego on a Thursday will often find tickets for as low as $249. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $467. 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 afternoon when flights can be purchased for as low as $269. Flights at noon are often more expensive with an average ticket price of $369.

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

Best Price Found

$78

Fastest flight time

3h 34m

Direct flights

None
The best one-way flight to San Diego from Ontario in the past 72 hours is $78. The best round-trip flight deal from Ontario to San Diego found on momondo in the last 72 hours is $155.
The fastest flight from Ontario to San Diego takes 3h 34m
There are no direct flights from Ontario to San Diego. There are no popular flight routes from Ontario to San Diego.
Search flight deals

Frequently asked questions about flying from Ontario to San Diego

  • 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 3h 34m.

  • 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.

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
Chula Vista
El Cajon
Coronado
National City
La Mesa
Julian
San Ysidro
Poway
Santee
Imperial Beach
Alpine
Lemon Grove
Borrego Springs

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.

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