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Cheap flights from San Diego to Ontario from C$ 144

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Diego to Ontario departing on 10/3. 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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Find the cheapest flights from San Diego to Ontario

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:08 p.m. - 6:13 a.m.
SAN
-
YYZ
13h 05m
2 stops
Multiple Airlines Logo
8:00 p.m. - 1:13 p.m.
YYZ
-
SAN
20h 13m
1 stop
C$ 350Multiple Airlines
Wed, 11 Mar - Mon, 23 Mar
Multiple Airlines Logo
9:07 p.m. - 6:13 a.m.
SAN
-
YYZ
30h 06m
2 stops
Multiple Airlines Logo
8:00 p.m. - 1:13 p.m.
YYZ
-
SAN
20h 13m
1 stop
C$ 353Multiple Airlines
Thu, 12 Mar - Mon, 23 Mar
American Airlines Logo
1:03 p.m. - 11:44 a.m.
SAN
-
YUL
19h 41m
1 stop
American Airlines Logo
12:30 p.m. - 11:33 p.m.
YUL
-
SAN
14h 03m
1 stop
C$ 467American Airlines
Tue, 7 Apr - Sat, 18 Apr
Air Canada Logo
7:00 a.m. - 3:33 p.m.
SAN
-
YUL
5h 33mdirect
Air Canada Logo
5:45 p.m. - 8:39 p.m.
YUL
-
SAN
5h 54mdirect
C$ 469Air Canada
Tue, 14 Jul - Sun, 19 Jul
Air Canada Logo
8:25 a.m. - 8:50 p.m.
SAN
-
YUL
9h 25m
1 stop
Air Canada Logo
5:45 p.m. - 8:39 p.m.
YUL
-
SAN
5h 54mdirect
C$ 477Air Canada
Tue, 14 Jul - Sun, 19 Jul
American Airlines Logo
1:03 p.m. - 11:44 a.m.
SAN
-
YUL
19h 41m
1 stop
American Airlines Logo
12:30 p.m. - 11:33 p.m.
YUL
-
SAN
14h 03m
1 stop
C$ 485American Airlines
Tue, 7 Apr - Sat, 18 Apr
WestJet Logo
3:30 p.m. - 7:50 p.m.
SAN
-
YKF
25h 20m
1 stop
WestJet Logo
6:00 a.m. - 1:20 p.m.
YKF
-
SAN
10h 20m
1 stop
C$ 550WestJet
Thu, 18 Jun - Wed, 24 Jun
WestJet Logo
3:30 p.m. - 5:15 p.m.
SAN
-
YHM
22h 45m
1 stop
WestJet Logo
6:10 p.m. - 2:10 p.m.
YHM
-
SAN
23h 00m
1 stop
C$ 575WestJet
Mon, 4 May - Thu, 7 May
United Airlines Logo
10:52 a.m. - 9:35 p.m.
SAN
-
YOW
7h 43m
1 stop
United Airlines Logo
6:00 a.m. - 11:16 a.m.
YOW
-
SAN
8h 16m
1 stop
C$ 674United Airlines
Wed, 22 Apr - Sun, 26 Apr
United Airlines Logo
10:15 p.m. - 9:21 p.m.
SAN
-
YXU
20h 06m
2 stops
United Airlines Logo
9:40 a.m. - 9:23 p.m.
YXU
-
SAN
14h 43m
2 stops
C$ 1,012United Airlines
Fri, 6 Mar - Mon, 9 Mar

Air Canada flights from San Diego to Region of Ontario

Our best Air Canada deals on San Diego to Region of Ontario flight tickets
Air Canada
14 Jul
SAN7:00 a.m.San Diego
5h 33m
YUL3:33 p.m.Montreal Pierre Elliott Trudeau Intl
19 Jul
YUL5:45 p.m.Montreal Pierre Elliott Trudeau Intl
5h 54m
SAN8:39 p.m.San Diego
C$ 469
Air Canada
14 Jul
SAN8:25 a.m.San Diego
9h 25m
1 stop
YUL8:50 p.m.Montreal Pierre Elliott Trudeau Intl
19 Jul
YUL5:45 p.m.Montreal Pierre Elliott Trudeau Intl
5h 54m
SAN8:39 p.m.San Diego
C$ 477
Air Canada
17 Apr
SAN1:10 p.m.San Diego
8h 21m
1 stop
YUL12:31 a.m.Montreal Pierre Elliott Trudeau Intl
2 May
YUL5:45 p.m.Montreal Pierre Elliott Trudeau Intl
5h 58m
SAN8:43 p.m.San Diego
C$ 488

United Airlines flights from San Diego to Region of Ontario

Our best United Airlines deals on San Diego to Region of Ontario flight tickets
United Airlines
22 Apr
SAN10:52 a.m.San Diego
7h 43m
1 stop
YOW9:35 p.m.Ottawa
26 Apr
YOW6:00 a.m.Ottawa
8h 16m
1 stop
SAN11:16 a.m.San Diego
C$ 674
United Airlines
11 Mar
SAN5:00 p.m.San Diego
14h 20m
1 stop
YUL10:20 a.m.Montreal Pierre Elliott Trudeau Intl
16 Mar
YUL6:25 p.m.Montreal Pierre Elliott Trudeau Intl
20h 13m
1 stop
SAN11:38 a.m.San Diego
C$ 682
United Airlines
5 Jun
SAN6:55 p.m.San Diego
12h 08m
2 stops
YOW10:03 a.m.Ottawa
8 Jun
YOW6:00 p.m.Ottawa
8h 40m
1 stop
SAN11:40 p.m.San Diego
C$ 688

momondo Fare Finder

 
Customize your flight search to find flights from San Diego to Region of Ontario 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 96,600 searches. Data last updated 8 February 2026.
Use the filters below to find and compare flights from San Diego to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Wed 11/3

2:08 p.m.-6:13 a.m.

2 stops13h 05m

Toronto Pearson Intl

Mon 23/3

8:00 p.m.-1:13 p.m.

1 stop20h 13m

C$ 350

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Thu 12/3

9:07 p.m.-6:13 a.m.

2 stops30h 06m

Toronto Pearson Intl

Mon 23/3

8:00 p.m.-1:13 p.m.

1 stop20h 13m

C$ 353

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Tue 7/4

1:03 p.m.-11:44 a.m.

1 stop19h 41m

Montreal Pierre Elliott Trudeau Intl

Sat 18/4

12:30 p.m.-11:33 p.m.

1 stop14h 03m

C$ 467

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Tue 14/7

7:00 a.m.-3:33 p.m.

Nonstop5h 33m

Montreal Pierre Elliott Trudeau Intl

Sun 19/7

5:45 p.m.-8:39 p.m.

Nonstop5h 54m

C$ 469

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Tue 14/7

8:25 a.m.-8:50 p.m.

1 stop9h 25m

Montreal Pierre Elliott Trudeau Intl

Sun 19/7

5:45 p.m.-8:39 p.m.

Nonstop5h 54m

C$ 477

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Tue 7/4

1:03 p.m.-11:44 a.m.

1 stop19h 41m

Montreal Pierre Elliott Trudeau Intl

Sat 18/4

12:30 p.m.-11:33 p.m.

1 stop14h 03m

C$ 485

San DiegoToronto

SAN - YKF

SANYKF

San Diego

Thu 18/6

3:30 p.m.-7:50 p.m.

1 stop25h 20m

Toronto Region of Waterloo Intl

Wed 24/6

6:00 a.m.-1:20 p.m.

1 stop10h 20m

C$ 550

San DiegoHamilton

SAN - YHM

SANYHM

San Diego

Mon 4/5

3:30 p.m.-5:15 p.m.

1 stop22h 45m

Hamilton

Thu 7/5

6:10 p.m.-2:10 p.m.

1 stop23h 00m

C$ 575

San DiegoOttawa

SAN - YOW

SANYOW

San Diego

Wed 22/4

10:52 a.m.-9:35 p.m.

1 stop7h 43m

Ottawa

Sun 26/4

6:00 a.m.-11:16 a.m.

1 stop8h 16m

C$ 674

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Fri 6/3

10:15 p.m.-9:21 p.m.

2 stops20h 06m

London

Mon 9/3

9:40 a.m.-9:23 p.m.

2 stops14h 43m

C$ 1,012

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 Ontario from

How to get the cheapest flight ticket from San Diego to Region of 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 month to fly to Region of Ontario?

In general, March is the cheapest month to fly from San Diego to Region of Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 394. If you are unable to visit Region of Ontario during the month of March, then departing from San Diego during the month April is also very affordable. Most momondo users find prices during this month for around C$ 403.

What is the cheapest day to depart on your flight to Region of Ontario?

The cheapest day to depart from San Diego to Region of Ontario is on a Friday. Travellers who choose to depart for Region of Ontario on a Friday will often find tickets for as low as C$ 254. The most expensive day to fly to Region of Ontario is Saturday, with ticket prices averaging around C$ 529.

What is the cheapest time of day to depart on your flight to Region of Ontario?

Our most recent data shows that the best time of day to fly to Region of Ontario is at noon. Flights from San Diego to Region of Ontario during this time can be as low as C$ 381. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 438 on average. Flights to Region of Ontario from San Diego in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest San Diego to Ontario flight route?

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

How far in advance should I book a flight to Region of Ontario?

You are more likely to see cheaper flights to Region of Ontario from San Diego when booking weeks ahead of your departure date. In general, you can expect to find flights to Region of Ontario for around C$ 571 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Region of Ontario from San Diego for as low as C$ 394 on momondo.

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

There are 3 cabin classes available to choose from on San Diego to Ontario 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 San Diego to Region of Ontario flights?

You could potentially save up to 41% on your flight if you consider stops on a San Diego to Region of Ontario flight.

Cheap San Diego to Region of Ontario flight deals and tips

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

Best price found

C$ 314

Fastest flight time

4h 50m

Direct flights

Every day

Airports in Region of Ontario

123 airports
The best one-way flight to Region of Ontario from San Diego in the past 72 hours is C$ 314. The best round-trip flight deal from San Diego to Region of Ontario found on momondo in the last 72 hours is C$ 148.
The fastest flight from San Diego to Region of Ontario takes 4h 50m
Direct flights go from San Diego to Region of Ontario every day.
There are 123 airports in Region of Ontario. From San Diego there are direct flights to Montreal Pierre Elliott Trudeau Intl (YUL), Toronto Pearson Intl (YYZ).
Search flight deals

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

    Prices for flights from San Diego Airport to Ontario were last updated today.

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

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

    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 San Diego Airport to Ontario.

  • What documentation or ID do you need to fly to Ontario?

    The travel and health documents you'll need for your trip to Ontario may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from San Diego to Region of Ontario

Compare and see reviews for airlines that fly from San Diego to Region of Ontario with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom C$ 217Free CancellationRating
7.4
9,254 reviews
Search United Airlines flights
Porter AirlinesPriceFrom C$ 276Free CancellationRating
7.9
412 reviews
Search Porter Airlines flights
Air CanadaPriceFrom C$ 417Free CancellationRating
7.1
10,697 reviews
Search Air Canada flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from San Diego to Ontario. momondo saves you time and could save you money on your trip.

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

Flights from San Diego to Ontario with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo provides multiple filters to help you find the best flight to Ontario from San Diego. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes momondo offers price alerts on flights to Ontario from San Diego. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Region of Ontario 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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Find better results for your trip to Ontario

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