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Cheap flights from Ontario to San Diego from $177

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 12/11. 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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Cheap round-trip flights

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WestJet Logo
8:00 am - 11:47 amYYZ-SAN
30h 47m2 stops
WestJet Logo
12:35 pm - 5:58 amSAN-YYZ
14h 23m2 stops
$344WestJet
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So, Feb 22 - Mi, Feb 25
American Airlines Logo
6:00 am - 2:16 pmYYZ-SAN
11h 16m1 stop
American Airlines Logo
6:15 am - 9:29 pmSAN-YYZ
12h 14m1 stop
$345American Airlines
Find Deal
Fr, Dez 12 - So, Dez 14
Multiple Airlines Logo
10:15 pm - 11:45 amYYZ-SAN
16h 30m2 stops
Multiple Airlines Logo
8:16 am - 7:55 pmSAN-YYZ
8h 39m1 stop
$348Multiple Airlines
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Sa, Jan 17 - Sa, Jan 24
Multiple Airlines Logo
7:55 pm - 12:11 pmYYZ-SAN
19h 16m1 stop
Multiple Airlines Logo
9:44 am - 6:20 amSAN-YYZ
17h 36m1 stop
$349Multiple Airlines
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Sa, Jan 3 - Sa, Jan 10
American Airlines Logo
7:00 am - 8:36 pmYUL-SAN
16h 36m1 stop
American Airlines Logo
2:01 pm - 3:08 pmSAN-YUL
22h 07m1 stop
$350American Airlines
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Di, Jan 13 - Sa, Jan 24
Alaska Airlines Logo
4:45 pm - 7:19 pmYYZ-SAN
29h 34m1 stop
Alaska Airlines Logo
6:15 am - 3:35 pmSAN-YYZ
30h 20m1 stop
$355Alaska Airlines
Find Deal
Sa, Jan 24 - Di, Feb 3
Delta Logo
1:02 pm - 10:31 pmYUL-SAN
12h 29m1 stop
Delta Logo
10:00 pm - 12:12 pmSAN-YUL
11h 12m1 stop
$379Delta
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Do, Jan 22 - Do, Jan 29
Delta Logo
12:50 pm - 10:45 pmYUL-SAN
12h 55m1 stop
Delta Logo
11:43 am - 11:12 pmSAN-YUL
8h 29m1 stop
$380Delta
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Do, Jan 29 - Sa, Feb 7
United Airlines Logo
2:15 pm - 8:47 pmYOW-SAN
9h 32m1 stop
United Airlines Logo
7:52 pm - 2:27 pmSAN-YOW
15h 35m2 stops
$419United Airlines
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Do, Jan 29 - Mo, Feb 2
United Airlines Logo
9:45 am - 6:36 pmYOW-SAN
11h 51m2 stops
United Airlines Logo
7:52 pm - 2:27 pmSAN-YOW
15h 35m2 stops
$420United Airlines
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Do, Jan 29 - Mo, Feb 2

Delta flights from Region of Ontario to San Diego

Our best Delta deals on Region of Ontario to San Diego flight tickets
Delta
Dec 10
YYZ6:30 amToronto Pearson Intl
10h 46m
2 stops
SAN2:16 pmSan Diego
Jan 5
SAN10:00 pmSan Diego
8h 04m
1 stop
YYZ9:04 amToronto Pearson Intl
$367
Find similar
Delta
Jan 8
YYZ6:00 amToronto Pearson Intl
9h 15m
1 stop
SAN12:15 pmSan Diego
Jan 28
SAN6:55 pmSan Diego
11h 09m
2 stops
YYZ9:04 amToronto Pearson Intl
$378
Find similar
Delta
Jan 29
YUL1:02 pmMontreal Pierre Elliott Trudeau Intl
8h 59m
1 stop
SAN7:01 pmSan Diego
Feb 10
SAN10:30 pmSan Diego
10h 15m
1 stop
YUL11:45 amMontreal Pierre Elliott Trudeau Intl
$380
Find similar

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
Dec 10
YYZ4:45 pmToronto Pearson Intl
29h 48m
1 stop
SAN7:33 pmSan Diego
Jan 5
SAN9:24 pmSan Diego
15h 11m
1 stop
YYZ3:35 pmToronto Pearson Intl
$375
Find similar
Alaska Airlines
Dec 10
YYZ4:45 pmToronto Pearson Intl
25h 21m
1 stop
SAN3:06 pmSan Diego
Jan 5
SAN9:24 pmSan Diego
15h 11m
1 stop
YYZ3:35 pmToronto Pearson Intl
$376
Find similar
Alaska Airlines
Dec 13
YYZ4:45 pmToronto Pearson Intl
20h 28m
1 stop
SAN10:13 amSan Diego
Jan 17
SAN2:20 pmSan Diego
22h 15m
1 stop
YYZ3:35 pmToronto Pearson Intl
$384
Find similar

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 November 21, 2025.
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

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

So 2/22

8:00 am-11:47 am

2 stops30h 47m

San Diego

Mi 2/25

12:35 pm-5:58 am

2 stops14h 23m

$344

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Fr 12/12

6:00 am-2:16 pm

1 stop11h 16m

San Diego

So 12/14

6:15 am-9:29 pm

1 stop12h 14m

$345

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Sa 1/17

10:15 pm-11:45 am

2 stops16h 30m

San Diego

Sa 1/24

8:16 am-7:55 pm

1 stop8h 39m

$348

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Sa 1/3

7:55 pm-12:11 pm

1 stop19h 16m

San Diego

Sa 1/10

9:44 am-6:20 am

1 stop17h 36m

$349

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Di 1/13

7:00 am-8:36 pm

1 stop16h 36m

San Diego

Sa 1/24

2:01 pm-3:08 pm

1 stop22h 07m

$350

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Sa 1/24

4:45 pm-7:19 pm

1 stop29h 34m

San Diego

Di 2/3

6:15 am-3:35 pm

1 stop30h 20m

$355

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Do 1/22

1:02 pm-10:31 pm

1 stop12h 29m

San Diego

Do 1/29

10:00 pm-12:12 pm

1 stop11h 12m

$379

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Do 1/29

12:50 pm-10:45 pm

1 stop12h 55m

San Diego

Sa 2/7

11:43 am-11:12 pm

1 stop8h 29m

$380

OttawaSan Diego

YOW - SAN

YOWSAN

Ottawa

Do 1/29

2:15 pm-8:47 pm

1 stop9h 32m

San Diego

Mo 2/2

7:52 pm-2:27 pm

2 stops15h 35m

$419

OttawaSan Diego

YOW - SAN

YOWSAN

Ottawa

Do 1/29

9:45 am-6:36 pm

2 stops11h 51m

San Diego

Mo 2/2

7:52 pm-2:27 pm

2 stops15h 35m

$420

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 February is also very affordable. Most momondo users find prices during this month for around $278.

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 $264. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around $460. 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 at noon are often more expensive with an average ticket price of $582.

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 $355 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 $307 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 17% 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

$234

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 $234. The best round-trip flight deal from Region of Ontario to San Diego found on momondo in the last 72 hours is $427.
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 near San Diego: 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 $115Free CancellationRating
8.0
393 reviews
Search Porter Airlines flights
Air CanadaPriceFrom $219Free CancellationRating
7.1
10,463 reviews
Search Air Canada flights
Air TransatPriceFrom $234Free CancellationRating
7.8
475 reviews
Search Air Transat flights
United AirlinesPriceFrom $236Free CancellationRating
7.4
9,028 reviews
Search United Airlines flights
DeltaPriceFrom $264Free CancellationRating
7.9
8,002 reviews
Search Delta 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
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?

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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1 adult
So 12/21
So 12/28
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