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Cheap flights from Ontario to San Diego from $154

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to San Diego departing on 5/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Ontario to San Diego

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
6:00 am - 1:20 pm
YOW
-
SAN
10h 20m1 stop
WestJet Logo
2:05 pm - 5:28 am
SAN
-
YOW
12h 23m2 stops
$254WestJet
Mon, May 25 - Mon, Jun 1
WestJet Logo
5:15 pm - 1:20 pm
YOW
-
SAN
23h 05m2 stops
WestJet Logo
2:05 pm - 5:28 am
SAN
-
YOW
12h 23m2 stops
$270WestJet
Mon, May 25 - Mon, Jun 1
American Airlines Logo
12:31 pm - 9:59 pm
YYZ
-
SAN
12h 28m1 stop
American Airlines Logo
10:35 pm - 12:30 pm
SAN
-
YYZ
10h 55m1 stop
$273American Airlines
Wed, Feb 25 - Wed, Mar 4
American Airlines Logo
4:44 pm - 10:26 pm
YYZ
-
SAN
8h 42m1 stop
American Airlines Logo
9:41 pm - 10:19 am
SAN
-
YYZ
9h 38m1 stop
$274American Airlines
Tue, Jan 27 - Tue, Feb 17
Air Canada Logo
3:00 pm - 8:43 pm
YYZ
-
SAN
8h 43m1 stop
Air Canada Logo
1:15 pm - 9:11 pm
SAN
-
YYZ
4h 56mnonstop
$275Air Canada
Tue, May 26 - Thu, May 28
United Airlines Logo
2:57 pm - 9:25 pm
YYZ
-
SAN
9h 28m1 stop
United Airlines Logo
10:30 pm - 8:58 am
SAN
-
YYZ
7h 28m1 stop
$276United Airlines
Fri, Feb 27 - Sat, Mar 7
Air Canada Logo
7:45 am - 5:24 pm
YOW
-
SAN
12h 39m1 stop
Air Canada Logo
6:05 pm - 6:43 am
SAN
-
YOW
9h 38m1 stop
$277Air Canada
Mon, Mar 2 - Mon, Mar 9
United Airlines Logo
6:45 am - 11:38 am
YYZ
-
SAN
7h 53m1 stop
United Airlines Logo
2:10 pm - 11:59 pm
SAN
-
YYZ
6h 49m1 stop
$277United Airlines
Fri, Feb 27 - Tue, Mar 3
Multiple Airlines Logo
7:45 am - 9:49 pm
YYZ
-
SAN
17h 04m2 stops
Multiple Airlines Logo
2:52 pm - 6:43 am
SAN
-
YYZ
12h 51m1 stop
$283Multiple Airlines
Wed, Feb 25 - Sun, Mar 1
Multiple Airlines Logo
8:25 am - 5:51 pm
YTZ
-
SAN
12h 26m2 stops
Multiple Airlines Logo
7:35 am - 10:10 pm
SAN
-
YTZ
11h 35m1 stop
$327Multiple Airlines
Thu, Feb 19 - Mon, Feb 23

Delta flights from Region of Ontario to San Diego

Our best Delta deals on Region of Ontario to San Diego flight tickets
Delta
Feb 28
YYZ12:11 pmToronto Pearson Intl
9h 05m
1 stop
SAN6:16 pmSan Diego
Mar 8
SAN10:10 pmSan Diego
7h 55m
1 stop
YYZ9:05 amToronto Pearson Intl
$276
Delta
Feb 13
YYZ5:15 pmToronto Pearson Intl
8h 47m
1 stop
SAN11:02 pmSan Diego
Feb 21
SAN10:10 pmSan Diego
10h 08m
1 stop
YYZ11:18 amToronto Pearson Intl
$278
Delta
May 14
YYZ2:15 pmToronto Pearson Intl
10h 29m
1 stop
SAN9:44 pmSan Diego
May 18
SAN10:30 pmSan Diego
7h 25m
1 stop
YYZ8:55 amToronto Pearson Intl
$297

Alaska Airlines flights from Region of Ontario to San Diego

Our best Alaska Airlines deals on Region of Ontario to San Diego flight tickets
Alaska Airlines
Feb 27
YYZ4:45 pmToronto Pearson Intl
24h 42m
2 stops
SAN2:27 pmSan Diego
Mar 6
SAN7:26 pmSan Diego
17h 09m
1 stop
YYZ3:35 pmToronto Pearson Intl
$329
Alaska Airlines
Feb 27
YYZ4:45 pmToronto Pearson Intl
9h 18m
1 stop
SAN11:03 pmSan Diego
Mar 7
SAN10:29 amSan Diego
25h 06m
2 stops
YYZ2:35 pmToronto Pearson Intl
$331
Alaska Airlines
Feb 24
YYZ4:45 pmToronto Pearson Intl
17h 32m
2 stops
SAN7:17 amSan Diego
Mar 6
SAN12:36 pmSan Diego
23h 59m
2 stops
YYZ3:35 pmToronto Pearson Intl
$332

momondo Fare Finder

 
Customize your flight search to find flights from Region of Ontario to San Diego that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated January 8, 2026.
Use the filters below to find and compare flights from Ontario to San Diego that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OttawaSan Diego

YOW - SAN

YOWSAN

Ottawa

Mon 5/25

6:00 am-1:20 pm

1 stop10h 20m

San Diego

Mon 6/1

2:05 pm-5:28 am

2 stops12h 23m

$254

OttawaSan Diego

YOW - SAN

YOWSAN

Ottawa

Mon 5/25

5:15 pm-1:20 pm

2 stops23h 05m

San Diego

Mon 6/1

2:05 pm-5:28 am

2 stops12h 23m

$270

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Wed 2/25

12:31 pm-9:59 pm

1 stop12h 28m

San Diego

Wed 3/4

10:35 pm-12:30 pm

1 stop10h 55m

$273

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Tue 1/27

4:44 pm-10:26 pm

1 stop8h 42m

San Diego

Tue 2/17

9:41 pm-10:19 am

1 stop9h 38m

$274

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Tue 5/26

3:00 pm-8:43 pm

1 stop8h 43m

San Diego

Thu 5/28

1:15 pm-9:11 pm

Nonstop4h 56m

$275

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Fri 2/27

2:57 pm-9:25 pm

1 stop9h 28m

San Diego

Sat 3/7

10:30 pm-8:58 am

1 stop7h 28m

$276

OttawaSan Diego

YOW - SAN

YOWSAN

Ottawa

Mon 3/2

7:45 am-5:24 pm

1 stop12h 39m

San Diego

Mon 3/9

6:05 pm-6:43 am

1 stop9h 38m

$277

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Fri 2/27

6:45 am-11:38 am

1 stop7h 53m

San Diego

Tue 3/3

2:10 pm-11:59 pm

1 stop6h 49m

$277

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Wed 2/25

7:45 am-9:49 pm

2 stops17h 04m

San Diego

Sun 3/1

2:52 pm-6:43 am

1 stop12h 51m

$283

TorontoSan Diego

YTZ - SAN

YTZSAN

Toronto Island

Thu 2/19

8:25 am-5:51 pm

2 stops12h 26m

San Diego

Mon 2/23

7:35 am-10:10 pm

1 stop11h 35m

$327

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 Region of 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 month to fly to San Diego?

If you are unable to visit San Diego during the month of April, then departing from Region of Ontario during the month March is also very affordable. Most momondo users find prices during this month for around $271.

What is the cheapest day to depart on your flight to San Diego?

The cheapest day to depart from Region of Ontario to San Diego is on a Friday. Travelers who choose to depart for San Diego on a Friday will often find tickets for as low as $272. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around $473. 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 evening when flights can be purchased for as low as $286. Flights in the morning are often more expensive with an average ticket price of $347.

What is the cheapest Ontario to San Diego flight route?

Fly from Toronto Pearson Intl to San Diego for the best Ontario - San Diego flight prices

How far in advance should I book a flight to San Diego?

You are more likely to see cheaper flights to San Diego from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around $370 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Diego from Region of Ontario for as low as $308 on momondo.

What cabin class options are available on Ontario to San Diego flights?

There are 3 cabin classes available to choose from on Ontario to San Diego flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Region of Ontario to San Diego flights?

You could potentially save up to 19% on your flight if you consider stops on a Region of Ontario to San Diego flight.

Cheap Region of Ontario to San Diego flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to San Diego

Best Price Found

$262

Fastest flight time

5h 15m

Direct flights

Every day

Airports in San Diego

1 airport
The best one-way flight to San Diego from Region of Ontario in the past 72 hours is $262. The best round-trip flight deal from Region of Ontario to San Diego found on momondo in the last 72 hours is $497.
The fastest flight from Region of Ontario to San Diego takes 5h 15m
Direct flights go from Region of Ontario to San Diego every day.
There is 1 airport in San Diego. From Region of Ontario there are direct flights to San Diego (SAN).
Search flight deals

  • When did momondo last update prices for flights from Ontario to San Diego Airport?

    Prices for flights from Ontario to San Diego Airport refresh daily.

  • How many operators does momondo search for flights from Ontario to San Diego Airport?

  • How old do you have to be to fly from Ontario to San Diego Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario to San Diego Airport.

  • What documentation or ID do you need to fly to San Diego Airport?

    The travel and health documents required for your trip to San Diego Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at San Diego Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Region of Ontario to San Diego?

Best airlines flying from Region of Ontario to San Diego

Compare and see reviews for airlines that fly from Region of Ontario to San Diego with momondo
Airline
Rating
Free Cancellation
Price
Porter AirlinesPriceFrom $142Free CancellationRating
8.0
406 reviews
Search Porter Airlines flights
Air CanadaPriceFrom $243Free CancellationRating
7.1
10,603 reviews
Search Air Canada flights
United AirlinesPriceFrom $255Free CancellationRating
7.4
9,142 reviews
Search United Airlines flights
DeltaPriceFrom $264Free CancellationRating
7.9
8,032 reviews
Search Delta flights
Air TransatPriceFrom $288Free CancellationRating
7.7
491 reviews
Search Air Transat flights

Traveling to a place near San Diego?

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

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to San Diego?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to San Diego for you.

Can I find flights from Ontario to San Diego with flexible booking policies on momondo?

All flight searches from Ontario to San Diego on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Ontario to San Diego?

Once all potential Ontario to San Diego flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Ontario to San Diego right now. Can momondo alert me if prices change?

If you are simply researching potential flights to San Diego, momondo offers a useful price alert feature which will track prices for flights to San Diego from Ontario and alert you when they change.

An easier way to manage your San Diego trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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