Cheap flights from Ontario to San Francisco Bay Area from C$ 252

In general, April is the cheapest month to fly from Region of Ontario to San Francisco Bay Area. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 470. If you aren’t able to travel during the month of April, then book flights to San Francisco Bay Area from Region of Ontario during May instead. Flights to San Francisco Bay Area in May, while not as cheap as those in April, still average around C$ 490.

The cheapest day to depart on your flight to San Francisco Bay Area is on a Friday when prices can be found for as low as C$ 823. This is often the case because there is less demand to fly during this day of the week. Flights from Region of Ontario to San Francisco Bay Area on a Sunday will generally be more expensive and average around C$ 1,213. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Our most recent data shows that the best time of day to fly to San Francisco Bay Area is at noon. Flights from Region of Ontario to San Francisco Bay Area during this time can be as low as C$ 666. In the evening is when there is more demand to fly to San Francisco Bay Area, so prices are often more expensive at around C$ 1,393 per ticket.

Fly from Toronto Pearson Intl to San Francisco for the best Ontario - San Francisco Bay Area flight prices

You are more likely to see cheaper flights to San Francisco Bay Area from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco Bay Area for around C$ 519 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco Bay Area from Region of Ontario for as low as C$ 433 on momondo.

There are 4 cabin classes available to choose from on Ontario to San Francisco Bay Area flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

WestJet, American Airlines, and Delta are the most popular carriers operating from Ontario to San Francisco Bay Area

Porter Airlines, Air Canada and United Airlines are the top three most popular airlines that fly to San Francisco Bay Area from Region of Ontario according to our data. Porter Airlines is the first choice among our users, with 40% of people opting to fly with this airline when travelling to San Francisco Bay Area. Keep in mind that there are 9 different airlines that fly to San Francisco Bay Area 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 Francisco Bay Area is 12 per day as of March 2026. The most frequent departure time is 6:00p.m., with 53% of daily flights leaving at noon.

The number of flights available between Region of Ontario and San Francisco Bay Area is 90 per week as of March 2026. The most frequent departure day is Fri, with 28% of weekly flights leaving on this day.