$192 Find Cheap Flights from Ontario to San Diego - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to San Diego departing on 9/27. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Ontario to San Diego

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to San Diego that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to San Diego

Fri, Oct 16 - Mon, Oct 19
WestJet Logo
6:10 am - 2:10 pm
YXU
-
SAN
11h 00m
1 stop
WestJet Logo
3:30 pm - 5:20 am
SAN
-
YXU
10h 50m
1 stop
$272WestJet
Tue, Oct 20 - Thu, Oct 22
WestJet Logo
7:20 am - 2:10 pm
YOW
-
SAN
9h 50m
1 stop
WestJet Logo
3:30 pm - 5:35 am
SAN
-
YOW
11h 05m
1 stop
$328WestJet
Fri, Oct 2 - Mon, Oct 5
Air Canada Logo
7:30 am - 4:12 pm
YUL
-
SAN
11h 42m
1 stop
Air Canada Logo
7:00 am - 3:27 pm
SAN
-
YUL
5h 27mnonstop
$330Air Canada
Fri, Oct 2 - Mon, Oct 5
Air Canada Logo
5:45 pm - 8:36 pm
YUL
-
SAN
5h 51mnonstop
Air Canada Logo
7:00 am - 3:27 pm
SAN
-
YUL
5h 27mnonstop
$330Air Canada
Tue, Oct 6 - Wed, Oct 7
United Airlines Logo
6:35 pm - 10:17 am
YUL
-
SAN
18h 42m
1 stop
United Airlines Logo
1:24 pm - 8:16 am
SAN
-
YUL
15h 52m
1 stop
$367United Airlines
Fri, Oct 2 - Mon, Oct 5
United Airlines Logo
9:45 am - 10:41 pm
YUL
-
SAN
15h 56m
1 stop
United Airlines Logo
10:20 pm - 1:09 pm
SAN
-
YUL
11h 49m
1 stop
$373United Airlines
Tue, Sep 15 - Sat, Sep 19
Delta Logo
6:10 am - 2:10 pm
YXU
-
SAN
11h 00m
1 stop
Delta Logo
3:30 pm - 5:20 am
SAN
-
YXU
10h 50m
1 stop
$403Delta
Wed, Sep 23 - Sat, Sep 26
American Airlines Logo
3:13 pm - 11:25 pm
YYZ
-
SAN
11h 12m
1 stop
American Airlines Logo
10:46 pm - 12:35 pm
SAN
-
YYZ
10h 49m
1 stop
$418American Airlines
Wed, Oct 7 - Tue, Nov 3
American Airlines Logo
11:40 am - 9:44 pm
YYZ
-
SAN
13h 04m
1 stop
American Airlines Logo
10:40 pm - 2:33 pm
SAN
-
YYZ
12h 53m
1 stop
$418American Airlines
Thu, Sep 3 - Wed, Sep 9
Delta Logo
7:00 am - 5:04 pm
YUL
-
SAN
13h 04m
1 stop
Delta Logo
12:52 pm - 11:50 pm
SAN
-
YUL
7h 58m
1 stop
$423Delta
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Good to know

Low season

October

Cheapest flight

$192
Best time to beat the crowds but there is an average 16% increase in price.
Most popular time to fly with an average 4% increase in price.
Flight from Ottawa to San Diego

FAQs for booking flights from Ontario to San Diego

  • How does KAYAK find such low prices on flights from Ontario to San Diego?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to San Diego.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to San Diego?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Diego from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to San Diego?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Diego with an airline and back to Ontario with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to San Diego?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Diego from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
National City
Julian
Borrego Springs
Poway
Alpine
Santee
Lemon Grove

Everything you need to know for your flight to San Diego

Information on the airport you'll fly into in San Diego

San Diego (SAN)