Cheap flights from Ontario to San Diego from C$ 230

In general, May is the cheapest month to fly from Region of Ontario to San Diego. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 587. If you are unable to visit San Diego during the month of May, then departing from Region of Ontario during the month April is also very affordable. Most momondo users find prices during this month for around C$ 611.

The cheapest day to depart on your flight to San Diego is on a Friday when prices can be found for as low as C$ 639. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to San Diego on Sunday is C$ 852.

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

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 C$ 680 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 C$ 579 on momondo.

There are 3 cabin classes available to choose from on Region of 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.

You could potentially save up to 30% on your flight if you consider stops on a Region of Ontario to San Diego flight.

WestJet, Air Canada, and United Airlines are the most popular carriers operating from Ontario to San Diego

Air Canada, United Airlines and Delta are the top three most popular airlines that fly to San Diego from Region of Ontario according to our data. Air Canada is the first choice among our users, with 55% of people opting to fly with this airline when travelling to San Diego. Keep in mind that there are 6 different airlines that fly to San Diego on a routine basis, so you have a few additional options to choose from.

The number of flights available between Region of Ontario and San Diego is 2 per day as of August 2026. The most frequent departure time is 9:00a.m., with 100% of daily flights leaving at noon.

The number of flights available between Region of Ontario and San Diego is 14 per week as of August 2026. The most frequent departure day is Mon, with 29% of weekly flights leaving on this day.