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Cheap flights from Ontario to San Francisco Bay Area from C$ 228

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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SFO
5 Mar — 12 Mar1
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 3 February 2026.

Tue 14/49:35 a.m.
YYZ
-
SFO
1 stop10h 17m
Multiple Airlines
Wed 22/43:31 p.m.
SFO
-
YYZ
2 stops25h 05m
Multiple Airlines
Deal found 2/2C$ 363
Fri 27/29:00 p.m.
YYZ
-
SFO
1 stop15h 30m
Multiple Airlines
Mon 16/38:09 p.m.
SFO
-
YYZ
1 stop7h 34m
Multiple Airlines
Deal found 2/2C$ 365
Mon 13/48:00 p.m.
YYZ
-
SFO
1 stop21h 26m
Multiple Airlines
Mon 20/42:01 p.m.
SFO
-
YYZ
1 stop13h 19m
Multiple Airlines
Deal found 2/2C$ 367
Tue 31/35:50 a.m.
YHM
-
SFO
1 stop9h 20m
WestJet
Tue 28/46:00 a.m.
SFO
-
YHM
1 stop8h 15m
WestJet
Deal found 2/2C$ 369
Tue 31/39:35 a.m.
YYZ
-
SFO
1 stop12h 02m
Multiple Airlines
Wed 8/410:14 p.m.
SFO
-
YYZ
1 stop29h 29m
Multiple Airlines
Deal found 3/2C$ 372
Tue 14/49:35 a.m.
YYZ
-
SFO
1 stop10h 17m
Multiple Airlines
Sun 19/42:01 p.m.
SFO
-
YYZ
1 stop13h 42m
Multiple Airlines
Deal found 2/2C$ 374
Wed 25/210:00 a.m.
YYZ
-
SJC
1 stop26h 39m
Multiple Airlines
Mon 9/38:20 p.m.
SJC
-
YYZ
2 stops20h 16m
Multiple Airlines
Deal found 1/2C$ 374
Thu 26/38:00 p.m.
YYZ
-
SFO
1 stop14h 58m
Multiple Airlines
Mon 30/310:48 p.m.
SFO
-
YYZ
2 stops17h 48m
Multiple Airlines
Deal found 3/2C$ 376
Thu 12/38:00 p.m.
YYZ
-
SJC
1 stop16h 25m
Multiple Airlines
Mon 16/37:42 p.m.
SJC
-
YYZ
1 stop8h 01m
Multiple Airlines
Deal found 2/2C$ 377
Thu 5/38:00 p.m.
YYZ
-
SFO
1 stop14h 58m
Multiple Airlines
Tue 10/37:32 p.m.
SFO
-
YYZ
2 stops21h 04m
Multiple Airlines
Deal found 3/2C$ 382
Fri 22/510:50 a.m.
YYZ
-
SFO
1 stop8h 50m
WestJet
Mon 25/56:00 a.m.
SFO
-
YYZ
2 stops12h 10m
WestJet
Deal found 2/2C$ 384
Thu 19/312:30 p.m.
YYZ
-
SFO
2 stops22h 28m
Multiple Airlines
Mon 23/38:09 p.m.
SFO
-
YYZ
1 stop7h 34m
Multiple Airlines
Deal found 3/2C$ 385

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 3 February 2026.

Round-trip from

C$ 362

One-way from

C$ 228

Popular in

December

Cheapest in

April

Average price

C$ 482
WestJet
  • WestJet
  • 31/5-6/6
  • 3 total stops
  • 21h 15m total
  • Ontario to San Francisco Bay Area
Search Deals
WestJet
  • WestJet
  • 10/3
  • 1 total stop
  • 9h 20m total
  • Ontario to San Francisco Bay Area
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 49 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 3 February 2026.
Use the filters below to find and compare flights from Ontario to San Francisco Bay Area that are best for you.

Fly from

Ontario

Fly to

San Francisco Bay Area

Route

Depart

Return

Price

TorontoSan Francisco

YKF - SFO

YKFSFO

Toronto Region of Waterloo Intl

Tue 10/3

6:20 a.m.-12:10 p.m.

1 stop8h 50m

San Francisco

Sun 15/3

1:00 p.m.-5:29 a.m.

1 stop13h 29m

C$ 373

TorontoSan Francisco

YKF - SFO

YKFSFO

Toronto Region of Waterloo Intl

Tue 31/3

6:20 a.m.-12:10 p.m.

1 stop8h 50m

San Francisco

Tue 28/4

1:00 p.m.-7:50 p.m.

1 stop27h 50m

C$ 408

HamiltonSan Francisco

YHM - SFO

YHMSFO

Hamilton

Wed 15/4

6:10 p.m.-12:10 p.m.

1 stop21h 00m

San Francisco

Mon 27/4

6:00 a.m.-5:15 p.m.

1 stop8h 15m

C$ 408

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Sat 28/2

4:45 p.m.-10:59 p.m.

1 stop9h 14m

San Jose

Mon 9/3

6:03 p.m.-3:35 p.m.

1 stop18h 32m

C$ 417

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Fri 27/2

10:05 a.m.-8:53 p.m.

2 stops13h 48m

San Jose

Tue 3/3

6:20 a.m.-3:59 p.m.

1 stop6h 39m

C$ 419

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Wed 25/2

4:45 p.m.-9:22 a.m.

1 stop19h 37m

San Jose

Mon 2/3

6:03 p.m.-3:35 p.m.

1 stop18h 32m

C$ 419

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Thu 5/3

10:05 a.m.-8:53 p.m.

2 stops13h 48m

San Jose

Tue 10/3

1:25 p.m.-11:57 p.m.

1 stop7h 32m

C$ 421

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Thu 26/2

7:50 a.m.-9:18 p.m.

2 stops16h 28m

San Jose

Mon 2/3

9:10 p.m.-11:07 a.m.

2 stops10h 57m

C$ 421

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Sat 28/2

12:20 p.m.-9:18 p.m.

1 stop11h 58m

San Jose

Mon 9/3

10:50 p.m.-1:36 p.m.

2 stops11h 46m

C$ 421

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Wed 25/2

12:07 p.m.-9:18 p.m.

2 stops12h 11m

San Jose

Thu 5/3

5:45 a.m.-10:54 p.m.

2 stops14h 09m

C$ 421

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/2

Showing 1-10 of 60 results
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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, April is the cheapest month in which you can book a flight from Region of Ontario to San Francisco Bay Area (average of C$ 197). Flying from Region of Ontario to San Francisco Bay Area in December is currently the most expensive (average of C$ 346). 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 3 February 2026.

It’s optimal to fly from Region of Ontario to San Francisco Bay Area at noon. By choosing this option you can save up to 51% on the cost of your flight, compared to a flight in the evening.

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 31 January 2026.

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

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 3 February 2026.

The most flights from CAON to zzXIH are scheduled on a Monday (16 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (6 on average).

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 WestJet, Alaska Airlines, and Delta fly from Region of Ontario to San Francisco Bay Area in about 8h 50m. The time it takes to get you to your destination can typically vary by up to 4h 58m. Airlines will cover a distance of 3566 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$ 160 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 Canada, with prices starting from C$ 194 and C$ 213, 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, April is the cheapest month in which you can book a flight from Region of Ontario to San Francisco Bay Area (average of C$ 197). Flying from Region of Ontario to San Francisco Bay Area in December is currently the most expensive (average of C$ 346). 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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Alternative routes for Ontario to San Francisco Bay Area

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from Ontario to San Francisco Bay Area

Discover the top 9 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 3 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Flair AirlinesCheapestC$ 115AverageC$ 467FlexibilityNo cancel feeOn-timeN/A
Search Flair Airlines flights
WestJetCheapestC$ 196AverageC$ 415FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 198AverageC$ 547FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapestC$ 254AverageC$ 572FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapestC$ 256AverageC$ 510FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Porter AirlinesCheapestC$ 304AverageC$ 447FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 330AverageC$ 640FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Alaska AirlinesCheapestC$ 331AverageC$ 508FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Air TransatCheapestC$ 362AverageC$ 518FlexibilityNo cancel feeOn-time50%
Search Air Transat 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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