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Cheap flights from Ontario to San Francisco Bay Area from C$ 224

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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SFO
21 Apr — 28 Apr1
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 22 March 2026.

Fri 22/512:25 p.m.
YOW
-
SFO
2 stops12h 30m
WestJet
Fri 29/56:05 p.m.
SFO
-
YOW
1 stop8h 30m
WestJet
Deal found 18/3C$ 377
Fri 5/612:25 p.m.
YOW
-
SFO
2 stops12h 30m
WestJet
Sun 14/66:05 p.m.
SFO
-
YOW
1 stop8h 30m
WestJet
Deal found 17/3C$ 390
Fri 17/49:50 a.m.
YYZ
-
SFO
Nonstop5h 55m
Porter Airlines
Fri 24/41:45 p.m.
SFO
-
YYZ
Nonstop4h 57m
Porter Airlines
Deal found 18/3C$ 395
Fri 1/511:10 p.m.
YYZ
-
SFO
2 stops15h 50m
WestJet
Fri 8/56:00 a.m.
SFO
-
YYZ
2 stops10h 55m
WestJet
Deal found 18/3C$ 396
Wed 20/59:45 a.m.
YYZ
-
SFO
Nonstop5h 35m
Multiple Airlines
Thu 25/66:05 p.m.
SFO
-
YYZ
1 stop8h 40m
Multiple Airlines
Deal found 17/3C$ 398
Wed 20/59:45 a.m.
YYZ
-
SFO
Nonstop5h 35m
Multiple Airlines
Mon 25/56:00 a.m.
SFO
-
YYZ
2 stops10h 55m
Multiple Airlines
Deal found 18/3C$ 399
Fri 1/56:15 a.m.
YYZ
-
SFO
1 stop8h 45m
Multiple Airlines
Tue 5/51:20 p.m.
SFO
-
YYZ
Nonstop5h 05m
Multiple Airlines
Deal found 17/3C$ 401
Fri 1/56:15 a.m.
YYZ
-
SFO
1 stop8h 45m
Multiple Airlines
Thu 7/510:40 p.m.
SFO
-
YYZ
2 stops18h 25m
Multiple Airlines
Deal found 17/3C$ 402
Thu 16/49:50 a.m.
YYZ
-
SFO
Nonstop5h 55m
Porter Airlines
Mon 20/41:45 p.m.
SFO
-
YYZ
Nonstop4h 57m
Porter Airlines
Deal found 17/3C$ 403
Tue 28/46:15 a.m.
YYZ
-
SFO
1 stop8h 45m
WestJet
Fri 1/56:00 a.m.
SFO
-
YYZ
2 stops12h 35m
WestJet
Deal found 18/3C$ 405
Sat 25/49:50 a.m.
YYZ
-
SFO
Nonstop5h 55m
Porter Airlines
Sun 26/41:45 p.m.
SFO
-
YYZ
Nonstop4h 57m
Porter Airlines
Deal found 17/3C$ 406
Sat 25/49:50 a.m.
YYZ
-
SFO
Nonstop5h 55m
Multiple Airlines
Tue 5/510:40 p.m.
SFO
-
YYZ
2 stops23h 25m
Multiple Airlines
Deal found 17/3C$ 407

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 22 March 2026.

Round-trip from

C$ 377

One-way from

C$ 224

Popular in

December

Cheapest in

April

Average price

C$ 561
WestJet
  • WestJet
  • 22/5-29/5
  • 3 total stops
  • 21h 00m total
  • Ontario to San Francisco Bay Area
Search Deals
WestJet
  • WestJet
  • 8/6
  • 2 total stops
  • 12h 30m total
  • Ontario to San Francisco Bay Area
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 23 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 22 March 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
Quickest round-trip

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Tue 12/5

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

Nonstop5h 35m

San Francisco

Wed 13/5

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

Nonstop5h 05m

C$ 418

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Fri 5/6

7:20 a.m.-4:40 p.m.

1 stop12h 20m

San Francisco

Sun 14/6

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

1 stop8h 15m

C$ 425

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Fri 24/4

1:00 p.m.-10:41 p.m.

1 stop12h 41m

San Jose

Tue 28/4

3:45 p.m.-1:42 p.m.

2 stops18h 57m

C$ 454

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Fri 24/4

7:45 a.m.-10:01 p.m.

2 stops17h 16m

San Jose

Tue 28/4

6:00 p.m.-8:56 a.m.

2 stops11h 56m

C$ 454

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Wed 1/4

6:20 a.m.-9:33 p.m.

2 stops18h 13m

San Jose

Wed 8/4

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

1 stop7h 32m

C$ 455

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Wed 29/4

10:15 a.m.-10:41 p.m.

1 stop15h 26m

San Jose

Fri 1/5

12:56 p.m.-9:54 a.m.

2 stops17h 58m

C$ 455

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Mon 20/4

1:30 p.m.-9:45 p.m.

1 stop11h 15m

San Jose

Tue 28/4

6:00 p.m.-8:56 a.m.

2 stops11h 56m

C$ 455

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Fri 24/4

12:16 p.m.-10:01 p.m.

2 stops12h 45m

San Jose

Mon 4/5

9:37 a.m.-11:10 p.m.

2 stops10h 33m

C$ 455

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Tue 21/4

6:15 a.m.-12:21 p.m.

1 stop9h 06m

San Jose

Tue 5/5

8:20 p.m.-12:19 p.m.

2 stops12h 59m

C$ 457

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Mon 15/6

1:30 p.m.-10:53 p.m.

1 stop12h 23m

San Jose

Thu 25/6

10:56 p.m.-1:25 p.m.

1 stop11h 29m

C$ 458

Flights are sorted by cheapest round-trip flights first.

Deals found on 21/3

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, August is the cheapest month in which you can book a flight from Region of Ontario to San Francisco Bay Area (average of C$ 218). Flying from Region of Ontario to San Francisco Bay Area in December is currently the most expensive (average of C$ 347). 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 22 March 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 52% 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 14 March 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 22 March 2026.

The most flights from CAON to zzXIH are scheduled on a Monday (21 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 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 Porter Airlines, WestJet, and United Airlines 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 7h 06m. 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$ 167 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 Alaska Airlines, with prices starting from C$ 204 and C$ 222, 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, August is the cheapest month in which you can book a flight from Region of Ontario to San Francisco Bay Area (average of C$ 218). Flying from Region of Ontario to San Francisco Bay Area in December is currently the most expensive (average of C$ 347). 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 22 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Flair AirlinesCheapestC$ 115AverageC$ 469FlexibilityNo cancel feeOn-timeN/A
Search Flair Airlines flights
Air CanadaCheapestC$ 199AverageC$ 577FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 218AverageC$ 437FlexibilityNo cancel feeOn-time60%
Search WestJet flights
American AirlinesCheapestC$ 255AverageC$ 612FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapestC$ 257AverageC$ 509FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Alaska AirlinesCheapestC$ 289AverageC$ 443FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Porter AirlinesCheapestC$ 308AverageC$ 508FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 346AverageC$ 661FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air TransatCheapestC$ 377AverageC$ 556FlexibilityNo 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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