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Cheap flights from Ontario to San Francisco Bay Area from C$ 198

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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SFO
15 Oct — 22 Oct1
1 adult
1 adult, Economy

Cheap 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 15 September 2025.

Round-trip from

C$ 337

One-way from

C$ 198

Popular in

December

Cheapest in

April

Average price

C$ 569
WestJet
  • WestJet
  • 6/10-12/10
  • 2 total stops
  • 17h 44m total
  • Ontario to San Francisco Bay Area
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WestJet
  • WestJet
  • 12/12
  • 1 total stop
  • 9h 12m total
  • Ontario to San Francisco Bay Area
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 46 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 20 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to San Francisco Bay Area

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 15 September 2025.

Mon 6/106:00 a.m.YHM - SFO
1 stop8h 54mWestJet
Sat 11/1012:50 p.m.SFO - YHM
1 stop8h 50mWestJet
Deal found 15/9C$ 334
Mon 6/106:00 a.m.YHM - SFO
1 stop8h 54mWestJet
Sun 12/1012:50 p.m.SFO - YHM
1 stop8h 50mWestJet
Deal found 15/9C$ 336
Tue 7/106:00 a.m.YHM - SFO
1 stop8h 54mWestJet
Thu 9/1012:50 p.m.SFO - YHM
1 stop8h 50mWestJet
Deal found 14/9C$ 347
Mon 6/106:00 a.m.YHM - SFO
1 stop8h 54mWestJet
Thu 9/1012:50 p.m.SFO - YHM
1 stop8h 50mWestJet
Deal found 15/9C$ 348
Wed 15/106:00 a.m.YHM - SFO
1 stop8h 54mWestJet
Wed 22/1012:50 p.m.SFO - YHM
1 stop8h 50mWestJet
Deal found 15/9C$ 351
Wed 1/106:00 a.m.YHM - SFO
1 stop8h 54mWestJet
Wed 8/1012:50 p.m.SFO - YHM
1 stop8h 50mWestJet
Deal found 14/9C$ 358
Tue 30/96:00 a.m.YHM - SFO
1 stop8h 54mWestJet
Wed 1/1012:50 p.m.SFO - YHM
1 stop8h 50mWestJet
Deal found 15/9C$ 362
Tue 30/96:00 a.m.YHM - SFO
1 stop8h 54mWestJet
Tue 7/1012:50 p.m.SFO - YHM
1 stop8h 50mWestJet
Deal found 14/9C$ 369
Mon 6/106:00 a.m.YHM - SFO
2 stops30h 30mMultiple Airlines
Sat 11/1012:50 p.m.SFO - YHM
1 stop8h 50mMultiple Airlines
Deal found 15/9C$ 374
Tue 30/99:30 a.m.YYZ - SFO
1 stop14h 51mMultiple Airlines
Sun 12/1010:15 a.m.SFO - YYZ
1 stop11h 28mMultiple Airlines
Deal found 15/9C$ 374
Fri 24/106:00 a.m.YHM - SFO
1 stop8h 54mWestJet
Tue 28/101:00 p.m.SFO - YHM
1 stop25h 17mWestJet
Deal found 14/9C$ 376
Thu 23/1012:00 p.m.YYZ - SFO
2 stops12h 24mMultiple Airlines
Mon 27/101:40 p.m.SFO - YYZ
Nonstop4h 57mMultiple Airlines
Deal found 15/9C$ 376

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 15 September 2025.
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

HamiltonSan Francisco

YHM - SFO

YHMSFO

Hamilton

Wed 15/10

6:00 a.m.-11:54 a.m.

1 stop8h 54m

San Francisco

Wed 22/10

12:50 p.m.-12:40 a.m.

1 stop8h 50m

C$ 351

HamiltonSan Francisco

YHM - SFO

YHMSFO

Hamilton

Wed 1/10

6:00 a.m.-11:54 a.m.

1 stop8h 54m

San Francisco

Wed 8/10

12:50 p.m.-12:40 a.m.

1 stop8h 50m

C$ 358

HamiltonSan Francisco

YHM - SFO

YHMSFO

Hamilton

Tue 13/1

5:45 a.m.-12:12 p.m.

1 stop9h 27m

San Francisco

Tue 10/2

1:00 p.m.-5:16 p.m.

1 stop25h 16m

C$ 363

HamiltonSan Francisco

YHM - SFO

YHMSFO

Hamilton

Fri 24/10

6:00 a.m.-11:54 a.m.

1 stop8h 54m

San Francisco

Tue 28/10

1:00 p.m.-5:17 p.m.

1 stop25h 17m

C$ 376

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Tue 14/10

10:25 p.m.-11:54 a.m.

1 stop16h 29m

San Francisco

Tue 21/10

7:30 a.m.-6:52 p.m.

1 stop8h 22m

C$ 380

HamiltonSan Francisco

YHM - SFO

YHMSFO

Hamilton

Wed 1/10

6:00 a.m.-11:54 a.m.

1 stop8h 54m

San Francisco

Sun 5/10

7:30 a.m.-12:40 a.m.

1 stop14h 10m

C$ 396

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Fri 24/10

9:45 a.m.-9:29 a.m.

1 stop26h 44m

San Francisco

Mon 27/10

1:40 p.m.-9:37 p.m.

Nonstop4h 57m

C$ 402

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Fri 6/3

3:11 p.m.-11:14 p.m.

1 stop11h 03m

San Francisco

Sat 14/3

5:15 a.m.-9:18 p.m.

2 stops13h 03m

C$ 405

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 19/11

11:10 a.m.-7:07 p.m.

1 stop10h 57m

San Francisco

Sun 23/11

7:10 p.m.-3:23 p.m.

2 stops17h 13m

C$ 405

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 30/10

7:30 p.m.-1:15 a.m.

1 stop8h 45m

San Francisco

Thu 13/11

7:10 p.m.-3:23 p.m.

2 stops17h 13m

C$ 405

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/9

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, January is the cheapest month in which you can book a flight from Region of Ontario to San Francisco Bay Area (average of C$ 276). Flying from Region of Ontario to San Francisco Bay Area in December is currently the most expensive (average of C$ 368). 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 15 September 2025.

When flying from Region of Ontario to San Francisco Bay Area, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 15 September 2025.

The most flights from CAON to zzXIH are scheduled on a Monday (22 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 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, United Airlines, and Porter Airlines fly from Region of Ontario to San Francisco Bay Area in about 5h 55m. The time it takes to get you to your destination can typically vary by up to 5h 08m. 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$ 209 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on United Airlines and Air Canada, with prices starting from C$ 235 and C$ 240, 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$ 276). Flying from Region of Ontario to San Francisco Bay Area in December is currently the most expensive (average of C$ 368). 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 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 15 September 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 242AverageC$ 429FlexibilityNo cancel feeOn-time60%
Search WestJet flights
American AirlinesCheapestC$ 257AverageC$ 589FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapestC$ 299AverageC$ 506FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapestC$ 305AverageC$ 578FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 334AverageC$ 667FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 338AverageC$ 475FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Alaska AirlinesCheapestC$ 389AverageC$ 645FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Air TransatCheapestC$ 425AverageC$ 512FlexibilityNo 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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