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Cheap flights from Ontario to San Francisco Bay Area from C$ 253

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 22/8. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SFO
3 Sep — 10 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to San Francisco Bay Area

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to San Francisco Bay Area
Explore the most affordable flight options available from Ontario to San Francisco Bay Area. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 August 2026.

Thu 3/99:45 a.m.
YYZ
-
SFO
Nonstop5h 35m
Porter Airlines
Thu 10/91:20 p.m.
SFO
-
YYZ
Nonstop5h 05m
Porter Airlines
Deal found 31/7C$ 435
Thu 3/912:00 p.m.
YYZ
-
SFO
2 stops12h 55m
WestJet
Thu 10/96:00 a.m.
SFO
-
YYZ
2 stops10h 55m
WestJet
Deal found 31/7C$ 437
Mon 14/98:35 p.m.
YYZ
-
SFO
1 stop14h 39m
Multiple Airlines
Mon 21/92:28 p.m.
SFO
-
YYZ
1 stop13h 11m
Multiple Airlines
Deal found 31/7C$ 439
Thu 3/99:00 a.m.
YYZ
-
SFO
1 stop10h 40m
WestJet
Wed 9/96:00 a.m.
SFO
-
YYZ
2 stops10h 55m
WestJet
Deal found 2/8C$ 441
Thu 3/99:45 a.m.
YYZ
-
SFO
Nonstop5h 35m
Multiple Airlines
Wed 9/96:00 a.m.
SFO
-
YYZ
2 stops12h 35m
Multiple Airlines
Deal found 1/8C$ 445
Fri 21/85:50 p.m.
YYZ
-
SJC
1 stop8h 54m
Delta
Sat 29/87:00 a.m.
SJC
-
YYZ
2 stops13h 18m
Delta
Deal found 29/7C$ 446
Wed 16/99:55 a.m.
YYZ
-
SFO
1 stop11h 29m
Multiple Airlines
Wed 23/96:00 a.m.
SFO
-
YYZ
2 stops10h 55m
Multiple Airlines
Deal found 30/7C$ 446
Tue 15/96:15 p.m.
YYZ
-
SJC
1 stop19h 38m
American Airlines
Tue 22/92:36 p.m.
SJC
-
YYZ
1 stop20h 23m
American Airlines
Deal found 3/8C$ 448
Wed 16/99:55 a.m.
YYZ
-
SFO
1 stop11h 29m
Multiple Airlines
Thu 24/96:00 a.m.
SFO
-
YYZ
2 stops10h 55m
Multiple Airlines
Deal found 30/7C$ 448
Wed 16/99:45 a.m.
YYZ
-
SFO
Nonstop5h 35m
Multiple Airlines
Sat 19/96:00 a.m.
SFO
-
YYZ
2 stops10h 55m
Multiple Airlines
Deal found 2/8C$ 449
Thu 17/99:45 a.m.
YYZ
-
SFO
Nonstop5h 35m
Multiple Airlines
Tue 22/96:00 a.m.
SFO
-
YYZ
2 stops10h 55m
Multiple Airlines
Deal found 30/7C$ 451
Thu 20/86:15 a.m.
YYZ
-
SJC
2 stops10h 59m
Delta
Thu 10/96:19 p.m.
SJC
-
YYZ
2 stops11h 34m
Delta
Deal found 3/8C$ 452

Find flight deals from Ontario to San Francisco Bay Area

Keep the following information in mind while searching for Ontario to San Francisco Bay Area flight deals. Data was last updated 4 August 2026.

Round-trip from

C$ 435

One-way from

C$ 253

Popular in

July

Cheapest in

November

Average price

C$ 649
Porter Airlines
  • Porter Airlines
  • 3/9-10/9
  • Nonstop
  • 10h 40m total
  • Ontario to San Francisco Bay Area
Search Deals
American Airlines
  • American Airlines
  • 22/8
  • 1 total stop
  • 19h 22m total
  • Ontario to San Francisco Bay Area
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 103 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to San Francisco Bay Area 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, Cheapflights users made 629,999 searches. Data last updated 4 August 2026.
Use the filters below to find and compare flights from Ontario to San Francisco Bay Area that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Fri 21/8

6:10 a.m.-4:06 p.m.

2 stops12h 56m

San Jose

Sat 29/8

7:00 a.m.-11:18 p.m.

2 stops13h 18m

C$ 446

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Wed 9/9

6:15 a.m.-3:44 p.m.

2 stops12h 29m

San Jose

Mon 14/9

10:50 p.m.-10:23 a.m.

1 stop8h 33m

C$ 446

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Tue 15/9

12:08 p.m.-7:51 p.m.

2 stops10h 43m

San Jose

Tue 22/9

12:51 p.m.-11:59 p.m.

1 stop8h 08m

C$ 452

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Wed 2/9

6:15 a.m.-12:27 p.m.

1 stop9h 12m

San Jose

Wed 9/9

6:19 p.m.-8:53 a.m.

2 stops11h 34m

C$ 452

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Tue 1/9

6:15 a.m.-12:27 p.m.

1 stop9h 12m

San Jose

Tue 8/9

6:19 p.m.-8:53 a.m.

2 stops11h 34m

C$ 452

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Thu 20/8

6:15 a.m.-6:29 p.m.

2 stops15h 14m

San Jose

Sun 23/8

12:32 p.m.-11:57 p.m.

1 stop8h 25m

C$ 452

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Wed 16/9

12:25 p.m.-8:41 p.m.

1 stop11h 16m

San Jose

Sun 20/9

6:40 a.m.-9:59 p.m.

1 stop12h 19m

C$ 452

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Fri 21/8

6:10 a.m.-4:06 p.m.

2 stops12h 56m

San Jose

Fri 28/8

7:00 a.m.-11:57 p.m.

2 stops13h 57m

C$ 465
Quickest round-trip

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Wed 9/9

9:45 a.m.-12:20 p.m.

Nonstop5h 35m

San Francisco

Tue 13/10

1:20 p.m.-9:25 p.m.

Nonstop5h 05m

C$ 508

TorontoSan Francisco

YKF - SFO

YKFSFO

Toronto Region of Waterloo Intl

Tue 22/9

8:40 p.m.-12:00 p.m.

1 stop18h 20m

San Francisco

Tue 29/9

6:00 a.m.-7:50 p.m.

1 stop10h 50m

C$ 515

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/8

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Ontario to San Francisco Bay Area

Have a flexible travel schedule? Discover the best time to fly to San Francisco Bay Area from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to San Francisco Bay Area

What is the cheapest month to book a flight from Region of Ontario to San Francisco Bay Area?

Currently, January is the cheapest month in which you can book a flight from Region of Ontario to San Francisco Bay Area (average of C$ 515). Flying from Region of Ontario to San Francisco Bay Area in July is currently the most expensive (average of C$ 668). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ON to XIH?

Find hourly flight availability from Ontario to San Francisco Bay Area. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 4 August 2026.

It’s optimal to fly from Region of Ontario to San Francisco Bay Area in the morning. By choosing this option you can save up to 70% on the cost of your flight, compared to a flight at noon.

Weekly flight availability from Region of Ontario to San Francisco Bay Area

Explore weekly flight availability from Ontario to San Francisco Bay Area. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 4 August 2026.

The most flights from CAON to zzXIH are scheduled on a Saturday (24 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (20 on average).

How far ahead should I book a flight from Region of Ontario to San Francisco Bay Area?

Booking 79 days in advance of your planned departure date is, on average, the best time to get cheap flights from Region of Ontario to San Francisco Bay Area. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest day to fly from Region of Ontario to San Francisco Bay Area?

Use this chart to determine the cheapest time to fly round-trip from Ontario to San Francisco Bay Area. Price data was last updated on 1 August 2026.

Travelers seeking maximum savings on their Region of Ontario to San Francisco Bay Area flight should consider departing on Wednesday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

Find useful and relevant information for your journey from Ontario to San Francisco Bay Area. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Region of Ontario to San Francisco Bay Area?

    Airlines like Delta, Porter Airlines, and WestJet fly from Region of Ontario to San Francisco Bay Area in about 5h 35m. The time it takes to get you to your destination can typically vary by up to 12h 45m. Airlines will cover a distance of 3626 km. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Region of Ontario to San Francisco Bay Area one-way?

    C$ 165 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Porter Airlines and Air Transat, with prices starting from C$ 215 and C$ 228, respectively.

  • Can I find deals for flights from Ontario to San Francisco Bay Area that include hotel bookings?

    Yes. In addition to deals on Ontario to San Francisco Bay Area flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to San Francisco Bay Area?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to San Francisco Bay Area.

  • Can I find deals for business class flights from Ontario to San Francisco Bay Area?

    Yes. Cheapflights offers flight deals from Ontario to San Francisco Bay Area by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Region of Ontario to San Francisco Bay Area?

    Currently, January is the cheapest month in which you can book a flight from Region of Ontario to San Francisco Bay Area (average of C$ 515). Flying from Region of Ontario to San Francisco Bay Area in July is currently the most expensive (average of C$ 668). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 8 airlines flying from Ontario to San Francisco Bay Area

Discover the top 8 airlines that operate flights from Ontario to San Francisco Bay Area. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 4 August 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 224AverageC$ 517FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 259AverageC$ 666FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 289AverageC$ 533FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Alaska AirlinesCheapestC$ 295AverageC$ 404FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Porter AirlinesCheapestC$ 319AverageC$ 542FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
American AirlinesCheapestC$ 354AverageC$ 659FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air TransatCheapestC$ 372AverageC$ 581FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
United AirlinesCheapestC$ 411AverageC$ 654FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Ontario to San Francisco Bay Area?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to San Francisco Bay Area from Ontario today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Ontario to San Francisco Bay Area?

Cheapflights simply makes it quick and affordable to book flights from Ontario to San Francisco Bay Area by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Ontario to San Francisco Bay Area with no change fees?

Need flexible booking options for your flight to San Francisco Bay Area from Ontario? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Ontario to San Francisco Bay Area become cheaper?

Yes! Start tracking prices for Ontario to San Francisco Bay Area flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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